🔧 BUILD Broke EF turbo LS SC400 Build

General Information

I may have never posted on here before, but for some reason I am inspired to post my build up here. I am going to copy and paste from another site to get us all up to speed. I will try and clean up anything that was specific to the thread I am pulling from. Now that I am getting started on the main fab work I will update this thread in real time.

For anyone who doesn't want to read it all here is the short version. I bought the car on a whim in June of 2016. It is a 1993 SC400 that was from this area, and was meticulously maintained at the dealer. I was going to stay with the original 1UZ so you will see I started installing a procharger on it. I ended up selling off the stock motor, trans, ecu and harness to a local guy and got an iron gen 3 5.3 motor. I am doing a Precision LS-7675 turbo with a truck manifold based kit (more or less). It will be backed up by a TH400, and for now will use a stock ECU with HP Tuners.

Alright, time for the massive dump of info.


A couple years ago I picked up a 1993 SC400. I wasn't really looking for a car, but a late night search found this one, and I have always liked them. I decided to go down and give it a look in person, and it was even cleaner than it looked in the pics so I bought it. Here are a couple pics of when I first got it.

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I wont bore you with all of the middle shit, just hit you with the highlights.

I removed a couple tons of wiring that used to be an alarm system.
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I had the gauge cluster fixed/updated with white LED's.
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Fixed up the wiring that was kind of hacked up from the alarm. Changed the steering wheel, etc. etc.
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I then updated the climate control, and put in a nice head unit.
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Just a bunch of little changes and fixing up small things here and there. The car was extremely well maintained and really did not NEED much. My plan was always to make it fast of course, and do drag week with it. The factory 1UZ motor is a very good starting point and can make some really solid HP. The stock trans can be built to live as well. Packaging was kind of a nightmare as you can see, but other than that it was a good option.

I ended up stumbling upon a great deal on a procharger kit that was actually on an SC400 locally. It was a P1SC that came with some shitty piping, a way too small intercooler, but a Tial blow off valve that actually had the right spring it it! I started installing that setup.
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You can see one of the things that was constantly in the back of my mind for making this a drag week car. Look how complicated that engine looks! If I had a problem on the road not only would parts be an issue, but just the time to do simple repairs is a nightmare. For example the starter is under the intake manifold in the valley.

So when a local kid hurt the motor in his SC I offered mine up to get him back on the road since that is his only car. We struck a deal and I ripped that shit out the next day.
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It happened to work out that a 5.3 LS came up for sale for the same money I just sold my old motor for, so I jumped on it.
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Its update time! Nothing really exciting, but I have been slowly chipping away at things.

First up was wiring. I am planning on using the stock ECU for a little bit with HP Tuners, so I had some wiring work to do.

Harness as I got it with the motor
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Stripped of all of the brittle loom and crappy electrical tape.
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Unfortunately I ended up having to move it around after I had stripped off all of the crap, and it got pretty tangled.
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So I decided to just fully depin everything since I only need a few things from that mess.
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Here is the pile of junk I didn't need from that harness. There is actually a bit more, but that is 99.99% of it.
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And here is everything all apart, ready to be cleaned, routed, extended, and loomed.
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Next up I got some mounts for the LS from Dan Perlenfein. He even made me a custom trans mount for the TH400. These are very nice pieces, and I got them really quickly.
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Got them set in the car, fit like a glove! (BTW they are not bolted down in any of these pics, just have the nut on the other side a few turns)
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Next up I pulled the oil pan off my motor so I could drop it in and see what I am working with.
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Bit of wishful thinking seeing of the truck intake would clear the hood. It wont.
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So keep in mind that the mounts are not 100% bolted down yet. I need to get my trans from my buddy so I can get that in place before locking everything in place (just to take it all back out again). Once I have put the trans in then I can check a few things, and it can all come back out. Engine bay is going to get cleaned up, and the motor will get some TLC as well. I am still planning on trying to get it running and driving this year, but we will see if it happens. I am not one to let things be "good enough" so I may end up spending a bunch of money and time on the motor even though it will remain a stock bottom end.

Anyway I am really happy with the fitment, and how much space I have! This seems to be more room than I remember in an F-body (on the sides) even with a tubular K-Member. Should be able to get a big single in there no problem with a 4" down pipe to run out back. I am really glad I went LS!



Well time for a small update on the thread that nobody follows :) I got the trans, and a converter from my buddy a while back. Turns out the trans was shot, and needs a rebuild. That pretty much killed my plans for just getting it running this year. The good news is that I will be able to use it as a core to verify the trans mount, and hold everything in place so I can do all the fab work and wiring. I need to get un-lazy and move the car over in the garage so I can get the trans in one of these days. Its been hot as balls, and until I got my turbo there hasn't been much of a reason to bother getting it done. That excuse is out the window now though, since this came in last week

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Its nothing special, just a Precision LS 7675, which is a cast wheel journal bearing 76mm. It should be able to max out the 5.3 though, so it will do for now. This weekend (it was hot as balls) I went out to the garage for a bit to try and get some idea where I was going to place the turbo so I can start getting an idea for a materials list. First up I got the radiator sitting in place (close enough)
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These were the most obvious positions (turbo would need to be clocked differently for most) that I snapped some pics of not in any particular order.

Inside forward facing 45
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TA style
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Inside forward facing
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Outside forward facing
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That is really about all I got right now. I guess I also got the LS6 intake since my last update. That is still sitting on the truck steam ports which is why it isn't flat. I also got a set of non-EGR truck manifolds to use as the base of the turbo kit.

So right now I need to get everything mounted temporarily. That includes the trans, front accessories, exhaust manifolds, intake manifold, etc. Then I can lock down the turbo placement 100% and order material to start work. I also need to delete the ABS so I can mount the ECU over there and get started on the wiring. Well that's all for now, thanks for following along the journey of me seeing how dirty I can get my car.



Time for a small update, just because why not :)

I needed to get the trans in so I could check the fitment of the mount, as well as get everything locked into position for fabricating. Doing a trans by yourself is no fun, worse when you don't have a lift, and worse yet when you have to do some modifications for it to even fit. I ended up grabbing a trans jack from Harbor Freight to make my life a million times easier.
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The only downside to it is that it is quite a bit taller than having the trans on my regular jack, but other than that it was SO MUCH BETTER. I could slowly move it into position and make small changes to angle and overall position with ease. Not to mention how nice it is to have the trans stable as you are moving around to get a good look at everything. It turns out it only needed a little massaging to get it bolted into place. Again, that is without a shield on it (or a bell) but I was glad I didn't have to spend hours hammering overhead.

Ignore the mess, the garage is in process of getting a lot of work as well.

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Next up I wanted to see what I was working with on the exhaust manifolds.
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Driver side is actually hitting the frame, but that is fine since I always planned on v-banding them anyway.
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Plenty of space on the passenger side
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Next up was trying to get an idea of what to do for accessories. There are about a million options out there these days. I started by trying to place the stock truck pieces just to get some idea.
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Clearly those weren't going to work, but it was worth a shot. I have since figured out what I am going to do, but I will post more about that when I get all the parts. After that I reassembled the main fuse box under the hood. I need to patch where I cut for the procharger bracket, but the car is going to be outside for a bit while we finish the garage so I wanted to close off the fuses and wiring.
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That was about it. Got the car back on the ground and pushed back out of the way for now.
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Not really a crazy update, but progress none the less. While we are finishing the garage I will get the rest of the parts needed for the accessory drive setup. Once that is all in place I can start on fab work (FINALLY!), so hopefully the garage wont take too long. That's all I got for now, thanks for following along!



Nothing exciting, but parts have been coming in lately. I had to figure out and order up all of the front accessory drive components. Luckily there are a LOT of options for that kind of stuff these days. I ended up with a set of ICT billet brackets that will use a mix of F-body and Truck pieces.

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While I am at it, I got all new everything else too since most of it required f-body pieces anyway.

New tensioner
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New power steering pump pulley
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I have a new water pump, but no pic of it. The new power steering pump will be here early next week as well. I haven't ordered an alternator yet, but I will later when I get a crank pulley.

Next up is some of the fabrication pieces for the turbo kit. I have only ordered the parts and pieces for the hot side so far.

All stainless steel T4 flange, four 2.5" 90's for the crossover, and a 4" 90 for the start of the down pipe
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The stainless steel adapter from the weird 3-5/8" outlet of the turbo to 4" tubing.
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I am still waiting on the 2.5" stainless v-band assemblies and the stainless O2 bung. I will also run another section of stainless on the downpipe, then a bellows, then adapt to aluminum for the rest of the exhaust. I probably wont start on that until after I do the cold side piping, which I will hopefully be able to start directly after the hot side fabrication is done. My garage is currently being finished, so I wont be able to start work for a couple weeks still, but its great to see parts coming in! That's all I got for now, thanks for following along.


Here are the 2.5" stainless steel v-band assemblies and the stainless steel O2 bung.
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They are very nice with indexed flanges built in
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Quick release clamps, another nice touch!
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GM reman power steering pump came the other day as well
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I was a bit surprised to see that the pump did not come with the pulley bolt, or the reservoir cap. Not a big deal, just slightly annoying. That is all I have for now. The garage is taking longer than expected, but I have also been working on the wife's car anyway. Sometime next week I will probably stock up on welding supplies so I can be ready to go. I should have enough to get started, but I know I will need some soon.




On to a bit of news, my garage is 90% done!! Paint went on last night, so now I can trim it this weekend and move everything back. Here are a couple quick pics.

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For reference, here is a pic of the garage when we did our inspection (before we bought the house)
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It had a single light bulb, and the opener was plugged into an outlet next to the switch with an extension cord duct taped to the drywall.

Here is a shot after we had added the sub panel, lights, and pulled down the drywall. I then insulated everything, and put up new 5/8" drywall.
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I know not car related, but it has been a massive project that has delayed the car so I figured I would throw it in there now that I can see light at the end of that tunnel. Next update will be all car!



Well nothing too exciting to report still. I have been busy as hell finishing the garage, and getting our house ready for a party this weekend. I did however order up a bunch more material and pieces. I should have everything to build the intercooler piping except the intercooler (which is on backorder). I have all of the material to build my exhaust, but will probably need a couple v-bands so I can section it. Anyway, here are a couple pics.

Half stainless, half aluminum 4" V-band. I have two stainless steel 90's to come out of the turbo and get me to about the firewall, then it will be aluminum from there to the bumper. The other three pieces are 3" aluminum clamshell clamps for the intercooler piping.
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Detail of the 4" v-band
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And one of the clamshell clamps pulled apart.
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I also got two boxes of piping as well. Those have a single stainless steel 4" 90, ten 3" aluminum 90's, six 4" aluminum 90's, two 4" aluminum 45's, two 2' long aluminum straight sections, a 3" silicone coupler, and a 3" to 3.5" silicone adapter with T-Bolt clamps. I am really hoping to start fabrication next weekend now that I should be done with all of these other projects. My pile of parts/material is starting to take up too much space!




Finally time for a bit of an update! After busting our asses on Friday night, the garage is now 99% done. All that really means for non OCD people is that I have more than 2 outlets (a LOT more) and don't need to drag extension cords all over! Let me back up a second, I needed to get the steering rack out of the car since it was wore out and I got a replacement for it. I also wanted to take the motor out to make taking the rack out easier, and so I could do some things with it on the stand. Thursday night I got under the car and pulled the trans.

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Pretty easy to do with nothing really connected at all. Friday the car and the bike went outside while my buddy and I did the massive amount of electrical work in the garage. Saturday got mostly eaten up cleaning the garage from the previous nights thrashing. In the evening I got the car pulled back into the garage and was able to get back to work on it.

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I let the snow melt off and dry up a bit before getting to work pulling the motor. Not terribly hard (again, nothing to disconnect or move), but kind of a pain in the ass since I have to come at it from the side.
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So one of the first things I wanted to try, was see about fitting AC. I don't think I would run it this year, but if I could build with it in mind it would make things easy down the road. I grabbed a bracket and a junk compressor from a buddy so I could mock it up. He also had this manifold laying around, so I took that as well.
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It is clearly a tight fit, but I think I could make it work. It pretty much kills running a 4" downpipe on the passenger side though, so I grabbed a piece of tubing to see what it looked like on the driver side.
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Again, very tight but I should be able to make that work if I need to. I still haven't decided if I am going to mess with it or not, but its good to know about options. Next up was getting the front accessory drive all installed.

All laid out on the bench (minus the water pump since I forgot where I put it!)
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Unfortunately I have the wrong tensioner, and I clearly still need parts (balancer, thermostat housing, alternator, etc.) but I can move forward with fabrication for now. Once that was done I pulled out the old rack.
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Then I got the new poly bushing installed in the new rack
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Then got it put in for now.
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I am going to change the "EVO component", intermediate shaft, and outer tierods but its in the car so I can fabricate around it for now and keep it out of my way.

Then I got busy organizing all of my material so I could clear the space under my bench.

Pile of tubing!
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Ahhhh thats better
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At that point I was going to call it a night, but I decided to dive in and try and get something done. So I busted out the big boy grinder
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Then I hacked off the end of the driver side manifold
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Unfortunately, that was where I had to end it. Its been so long since I have welded, the batteries in the hood were dead! I am going to stop and get some on my way home today, and I am also waiting on some welding supplies. It was great to FINALLY be working on the car again! Like I said I am still unsure on the whole AC deal, but I think for now I am going to cut up that manifold and see whats up. I will also be putting the motor back in the car as soon as I get my new steering parts (that is a whole story on its own). Thats all I have for now, thanks as always for following along!




WHEW, that was a lot of info! I ended up having to pull the post from a site I had already done this same thing on. So I again apologize if it doesn't make a ton of sense since it was a catch up on a catch up. Going forward this will get updated in real time though. I have some tools and supplies coming this Friday, so hopefully I can get a good jump on some of the fab work. I guess we will see how it goes. Look for an update later in the weekend, or Monday. Hope you guys enjoy the build, I look forward to hearing from you guys.


Thanks,
Sean

Broke EF

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It's definitely gettin there man (y) You know now is not the time for shortcuts, so when it does fire up you know it'll be good to go. Cant wait for it!
Thanks! I try not to ever take shortcuts. I do like the idea of being able to fire it abd basically just be able to take off if I wanted. I dont know if it will be THAT fuinished when it starts, but the longer it goes the closer it gets.
 

Broke EF

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Its update time!! I have no idea why, its still not running, but I feel compelled to post here I guess :) It is getting SO CLOSE, and yet I have been super unmotivated to work on it lately. Today I got a decent amount of little stuff done, so lets bring you guys up to speed.

I started tying up the lines under the car a while back.
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I used stainless steel rivnuts with some red locktite on them to help hold them in place. Then balck stainless hardware, and stainless clamps. The undercoating on this car kills me. I had to grind it off around every point and its so thick in sposts its making the lines sit weird.

Then I started getting the battery mounted finally. I made up this piece (not my finest work) to support the battery.
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I decided to put a ground stud on it. My MIG welder was fucking up when I tacked it in, so ignore that :)
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I fully welded it in, and threw a coat of paint on it. While it was drying I started on my air system.
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That is all mounted on isolators, plumbed etc. I stil lneed to wire it, and run the push lock line up front.

Just working on the battery/wiring/kill switch
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So this pic you can see the 1/0 main power from the battery to the swicth, and from the switch to the circuit breaker. Then its a 2 from the switch to the relay board, and a 4 draped over the top that is for the alternator. For some reason I dont have a pic of it all finished.

Here you can see the 1/0 from the circuit breaker going to the front of the car
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Here you can see the main 1/0 for power up front as well as the 4 from the alternator being run with my trans cooler lines
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Qucik shot of the fuel pump wired up. This may end up being temporary, not sure. For anyone wondering its 12ga wire.
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I pretty much wrapped up the back of the car, and got the wiring pulled up front. I needed to get the Supra back on the lift so I shuffled everything around.
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Current pic of under the hood, just because.
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And swapped
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Thats about it, just lots of tedius little things lately. It is getting very close, I just need to buckle down and really get after it. I am going to get back to working on it after work which helps a lot more than you think.

Still trying to be ready for the track rental on the 6th. Fingers crossed
 

Broke EF

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Damn! That wiring is THICKKK

Electric/hybrid/turbo LS1!!
Yeah, its massive overkill. Basically it was the same price as 2ga from another place I was getting stuff from so I was like GO BIG OR GO HOME!!! Then I got the spool and was like, FUCK.

Its alright, between that and the battery I have given myself a lot of places to make improvements (remove weight) LOL
 
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Broke EF

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That fuel pump seems small for the caper you're running here. Is it just a booster for an in tank or am I missing something?
No, you're not missing anything, its just small(ish). It is basically an inline "044" pump which means iIt should support a decent amount of power, probably close to what the injectors can handle. It's kind of a toss up on which will run out of room first between the two. I knew I wouldn't be able to run the car very fast legally this first year, so I went with a more budget pump. Technically I can only run 11.49 with no cage or rollbar in the car. I HOPEFULLY dont need 1,000 WHP to do that :)

Bigger pump, and injectors are on the list for winter upgrades. I should be good on the -10 feed and -8 return for a while at least.
 
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Mr_Roboto

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No, you're not missing anything, its just small(ish). It is basically an inline "044" pump which means iIt should support a decent amount of power, probably close to what the injectors can handle. It's kind of a toss up on which will run out of room first between the two. I knew I wouldn't be able to run the car very fast legally this first year, so I went with a more budget pump. Technically I can only run 11.49 with no cage or rollbar in the car. I HOPEFULLY dont need 1,000 WHP to do that :)

Bigger pump, and injectors are on the list for winter upgrades. I should be good on the -10 feed and -8 return for a while at least.

Certainly enough pump to get you kicked off the track at 5 psi. :rofl:
 

Broke EF

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The 044 is a good piece.

It's just the old version of the modern turbine pump with straight blades on the Impeller.

The new stuff is just fancy brushless motors and curved plastic impellers
Yeah, its a good pump. Like I said it will do for this year. I want to get it changed to something big over winter along with injectors. Then the turbo should be the limiting factor, which is also around as far as I trust the stock bottom end.
 

Broke EF

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Just a small update for you guys. Starting with yesterday, my only goal was to just fire the damn car already. So I started with some of the wiring. I got my front distorbution block in place, landed the main power, and the starter. The rest of everything was just temped in place. Then I moved onto the coil packs, which are kind of a problem, but I just set them in place with some cheap stock wires to fire it. Then I ran and got more gas since it was pumping some air which I thought was weird. I think I had put 5 gallons in before. Anyway I got another 5 gallons and got it in the car. I turned on the power and was setting up the Holley and had to cycle it so I went to the back of the car...

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Fucking great.

So I pulled off the return (already off in this pic) and pumped out as much as I could the long way round. Only got about 5 gallons, which explains why I was pumping air before. Got the tank pulled out, and found a small pin hole on the back/bottom of the tank. Must have grounded out there when I was welding the fittings and burned through a small spot. Super annoying. I patched it up, back in the car, and so far it seems to be holding. I really should have just done a fuel cell from the start. Also, ignore the mess, and I am planning on redoing that line/valve set up out of the tank. Anyway, it started and ran, and had oil pressure. So overall it was a success even though I wasnt all that thrilled about it.

After that I went and got a new alternator finally. I went with the 145 amp unit to make sure I have enough juice for fans, pumps, system, etc.

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You can see the janky coil pack location for fire up :)
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Moving on to today, I decided to just keep chipping away at the wiring and other small things.
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So alternator is wired, starter is wired, main power to front of car is wired. I started on the wiring to the stock fuse box.
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Fianlly got the right belt for the car (6th times a charm)
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Just kind of cleaned some stuff up after that. Fixed my fan/radiator hose issue so I could get the radiator in. I also added insulation over the oil feed to the turbo, changed from the gauge (now that base pressure is set) to a pressure transducer for fuel, some other small things.
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Then I moved everything around so I could get something done on the supra again. I clerenced the tunnel in the couple of areas that needed it, and swung the enginge and trans back in. It looks like it should be good to go now, so I can finally start making progress on that thing again!!

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There is still so much to do to my car, but its getting very close. I am hoping by this weekend it can move under its own power for the first time in over 3 years! My main hangup is the damn coil packs/plug wires. It may look like there is plenty of room for them, but I assure you, there isnt. I am going to have to figure out some place inside the car. Once I do I can measure for plug wires and get those ordered. I also have some fab work to do still that I keep putting off.

Thats enough babbling for now. Hope you guys enjoy, and I hope to make it out to some stuff SOON!!!
 

Broke EF

TCG Elite Member
Dec 8, 2017
1,724
4,345
The sticks
Small victory, I figured out my coil packs. I actually went out to the garage yesterday and just started cleaning up some, then worked on the Supra a bit. Then for some reason I cant think of right now I took the intercooler off the SC. Then I was like wait a minute, this looks like it could work!!!

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That is finally done! I ordered up some Firecore 50 wires today which should be here later this week.

Next up is routing that line and wiring of course. I started running it on the driverside already, but its just pulled through and way long right now.

Anyway, just a small update. The location of the coil packs has been a pain in my ass for a while now, so I am happy its sorted out.
 

Broke EF

TCG Elite Member
Dec 8, 2017
1,724
4,345
The sticks
What a productive/eventful weekend! Probably not all that interesting, but here goes. Saturday was a LONG day to say the least. I got after it early and just worked on lots of tedious stuff. I did manage to figure out, and fabricate the new piece up to the trubo. One of those projects I have been putting off, which wasn't all that bad.

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However it seemed like this was the weekend that everyone I know wanted to come by and hang out. So I did get side tracked a bit. A good example of getting side tracked...

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Doesn't look as bad as it was, but thats down in a creek. My buddy took it for a spin with his daughter and decided to check out the un mowed field with 4' tall grass that he had never been in before. He was turning around and found the creek that boarders the one side and down they went. Both were OK, just a little banged up and shaken. Had to go do some recovery for a bit.

The good news is when he called me to come get him, he said come quick. And since he was on my ATV, I had to drive my truck most of the way back in there. I can now say I have taken it off road :)
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That is my buddy (not the one who crashed) backing it back out of the trails while I was riding back the ATV.

Once that ordeal was over, I saw that I got some packages including my FireCore 50 plug wires :D So I figured since I had a few friends over, I may as well slap it together enough to fire it up for everyone. I ran it for about a minute which was nice. Then I started working out my temporary exhaust, more on that later. We eneded up going by the neighbors for a fire, but when we came back I finished up welding the "exhaust" before I called it a night.

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Today I got back on wiring, and smaller tedious things. My neighbor voulenteered himself to help do the throttle cable last night, so he came by and started on that. He thought he was going to help hand the cable through. but he had to modify the pedal, make a bracket, etc. I gave him some guidance here and there, and also did the welding, but it turned out great and my pedal works perfect now. That was another project I was delaying :) While he was working on that I got the O2 bung in the exhaust, worked on wiring, got some stuff run etc. Its all pretty boring, and I only took a couple pics so here ya go.

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Clearly there is still wiring work to be done. I do have some stuff wired to the relay packs, kind of to test them out. But right now I do have key on power to the ECU, the ECU is handling the fuel pump (but the wiring is run poorly), and the starter trigger is janky. I still need to wire the fans (wire on left) the trans cooler, trans brake, and so on. Most of what is left is smaller projects that are good for after work. I think I am going to be able to fully heat cycle the motor in the next couple of days. Then I should be able to move it back to the lift to deal with a few things under the car like a couple small leaks and some final wiring. Making it to the track day Friday seems like a bit of a strech, but I am not writing it off yet. I maybe will just come out and get some miles on the car, but we will see how the week goes.

BTW this is the only forum getting updates :D I really need to get videos edited up and posted. I just have been spending every second on the car for the last few months. Anyway thats all for now.
 

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