🔧 BUILD Broke EF turbo LS SC400 Build

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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.




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.

I had the gauge cluster fixed/updated with white LED's.

Fixed up the wiring that was kind of hacked up from the alarm. Changed the steering wheel, etc. etc.

I then updated the climate control, and put in a nice head unit.

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.

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.


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.


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

Stripped of all of the brittle loom and crappy electrical tape.

Unfortunately I ended up having to move it around after I had stripped off all of the crap, and it got pretty tangled.

So I decided to just fully depin everything since I only need a few things from that mess.

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.

And here is everything all apart, ready to be cleaned, routed, extended, and loomed.

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.


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)

Next up I pulled the oil pan off my motor so I could drop it in and see what I am working with.

Bit of wishful thinking seeing of the truck intake would clear the hood. It wont.

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


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)

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

TA style

Inside forward facing

Outside forward facing

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.


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.




Next up I wanted to see what I was working with on the exhaust manifolds.

Driver side is actually hitting the frame, but that is fine since I always planned on v-banding them anyway.

Plenty of space on the passenger side

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.

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.

That was about it. Got the car back on the ground and pushed back out of the way for now.

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.


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

New tensioner

New power steering pump pulley

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

The stainless steel adapter from the weird 3-5/8" outlet of the turbo to 4" tubing.


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.

They are very nice with indexed flanges built in

Quick release clamps, another nice touch!

GM reman power steering pump came the other day as well

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.




For reference, here is a pic of the garage when we did our inspection (before we bought the house)

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.

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.

Detail of the 4" v-band

And one of the clamshell clamps pulled apart.

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.


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.


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.

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.

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.


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!)


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.


Then I got the new poly bushing installed in the new rack

Then got it put in for now.

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!

Ahhhh thats better

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

Then I hacked off the end of the driver side manifold

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.


Broke EF

TCG Elite Member
Dec 8, 2017
The sticks
Well I just looked over my data logs from the last two runs at Cordova. A few things to note

1. I only ever launch with about 2psi of boost
2. I shift too early usually (may need a light)
3. I made a peak of 21.9lbs on my second run :D
4. I love the scramble button!!

I need to drop the trans and converter, and find out once and forall where my mystery leak is coming from. I am not looking forward to doing that at all, but it was a big mess as the week went on. I also really want to get the car on a dyno to better dial in the tune, and safely find the cars limits. I can probably do it on track, but not before I get suspension. I was talking to some people about suspension yesterday, and I need to make a decision on what route to go with. The downside of these cars is there are basically 3 very different options for rear ends/suspension, all with pros and cons, all very expensive, and none of them are interchangeable at all. So I need to pick a path, and then stick to it.

Also, I am blown away at the amount of people who are confused about my removable wheel hanging on a hook. Car people, and non car people alike are very confused by it.
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Broke EF

TCG Elite Member
Dec 8, 2017
The sticks
Just a reminder :D

Nevermind the mess

So yesterday I wanted to take it out. Partly was to check that I fixed the massive issue I discovered after sick summer. The other part was I just want to drive it!! Well I had some runing around to do, and I took the SC

Went to autozone, then UPS store and grabbed some lunch. I got some weird looks from some old people, made me laugh.

ANYWAY, my major issue was indeed fixed. However, my trans is still leaking and seemingly getting worse. Today I drove it around to warm it up. Maybe, or maybe didnt make a full hit for the hell of it, and then drained the oil and the trans fluid.

Oil looked GREAT!

Trans fluid, also great!

I dropped the exhaust, and then decided to go work on the Supra instead. I really dont want to pull the trans out of this thing LOL.

Broke EF

TCG Elite Member
Dec 8, 2017
The sticks
Did the trans need to be freshened?
No, but its had a leak that just wont go away. Its between the bell housing and the main body. It got bad on Sick Summer, so I figured I should get it taken care of.

So yesterday I finished assembling the trans jack. I couldnt find my 12mm allen socket the other day, but I found it yesterday before I spent an hour going to Harbor Freight. Then got the trans up on there.

The downside of being tall...

That is the trans jack as high as it goes. The lift is as high as I can go with my ceilings, but in a perfect world I would actually go up one more lock. The way it is on the lift I can walk under standing up, but I have to duck under the ramps and the ends (or bash my head all the time). All that is to say I had to lower the car down quite a bit to be able to use the jack. I also had the trans on there wrong, so I had to drop it all down and move it all around.

I got it in last night, and buttoned up everything under the car.

It was still a pain in the ass but it was easier with the new jack. I ended up not installing the RIFE block yet. I didnt realize its -3 AN, and I only have a couple fittings for that. I need to get some adapters and line, hose ends etc. That will probably happen over winter when I install the I/O Expansion.

Today I cleared out under the car and then filled up all the fluids.


Filling the trans SUCKS with the hood on! Took me forever, but got it done. I took it for a short drive to get some gas. Everything seems pretty good, but I think I need to adjust the shifter cable a bit.



Got some parts coming this week so stay tuned.

Broke EF

TCG Elite Member
Dec 8, 2017
The sticks
What heat wrap is that in the trans tunnel?
Its from DEI, it was specifically for trans tunnels from what I remeber. Its really nice stuff, but expensive.

I saw a cool filler setup on FB, maybe it was M&M who sells it. basically a nice funnel.

Did you figure out how to fix the leak?

Also did you end up running a diaper on the car, how did that go.

Yeah the M&M funnel is nice, but expensive for what it is. Also probably wont really help me with the hood on.

I didnt figure out shit, but the trans guy did :D Seems to be finally fixed, it was still a bit wet the other day but that is probably from one of the cooler lines.

I did not run a diaper, but I do have one.
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Broke EF

TCG Elite Member
Dec 8, 2017
The sticks
So over the weekend I decided to do a bit of maintence. I usually dont bother, but last time I had it out it was missing a little so I figured I may as well.

Gapping them all, and looking over the old set

This car is actually pretty easy to do plugs on, only have to move the downpipe. I also double checked the manifold bolts while I was in there.

I also found the one pushlock line off again, which was probably what caused the miss. So I replaced it, and mounted the block AGAIN. I am going to replace all the pushlock with AN soon to eliminate that issue completely. I took it out for a rip after, and dman :D I have a video, but I probably shouldnt post it.

This weekend I am going to work on getting my 60' times down. Starting with some brand new struts.

It will make sense later why I am doing these, but just know its temporary. I also got new pads and rotors for the rear supra brakes. New extended wheel studs for all 4 corners. I am going to roll the fenders, which is something I am not looking forward to. That is all basically just to fit these guys.

I also got some traction rods and toe rods, but I dont think I am going to put those on yet. I have more suspension parts I want to get sooner than later, and all of them will requre me to align the car so I am leaning toward doing that once.

I am planning on getting back to the track soon to get that ET down where it should be. I also want to just take it out more and get more miles on it, so what is coming up that I should come out to?!

Broke EF

TCG Elite Member
Dec 8, 2017
The sticks
So today is the day to get the 15's on the car finally. I had been looking at these things, and gathering parts for this for months. The plan was to roll the fenders, and maybe also flare them slightlty. Then tear off the stock rear brakes, install the ARP extended wheel studs, and put on the NA Supra rear brakes with new pads and rotors. I got up, made a killer brealfast and then got to work!

First up, rolling the fenders!

This was going terrible, and eventually it came apart. This thing is cheap, and it shows. It actually was working fine, but I needed to do it a bit different than how I was. Since the brakes were out of the way, I figired I would throw a wheel on to see how it fits with the right tire, and fully seated anyway.


It really looks like I wont have a problem YET with the stock suspension. It was good enough for me to say fuck it, lets get to those brakes!

Before we move on, this is my old wheel and tire set up vs the new ones.


Old is a 245/50R16 Nitto NT555RII New is 275/60R14 Mickey Thompson ET Street SS.

It took some fucking around, but new brakes are on. I had to steal the new brake lines off the Supra. The caliper has a hole for a pin on the line, and its in a different spot, the aftermarket lines dont have a locating pin.


So one side done, on to the next!

Many hours later, still fucking around, but almost done with the other side.


While doing the studs on that side the new tool I got for those fell apart. So I was 2 for 2 on killing new tools today :D

I got the other side done, and then bled the brakes with the help of my neighbor. Then I FINALLY bolted up the new wheels and got them torqued down. Dropped the car down, fired it up and.... it wouldnt move.

Turns out that the wheels HIT THE FUCKING BRAKES!!!!!! I swear the brakes I installed today are the same fucking brakes I just took off, which according to the internet is 100% not the case.

I am so annoyed, but honestly that is how fucking EVERYTHING goes on this fucking car. I have no idea if its because these are 15X8 (which people have run of course), if its the specific wheel, if its the brakes and for some reason a 1995 NA supra has the bigger rear brakes, of who knows what else it could be. I am not sure what I want to do to fix this. I may just grind them down, I may buy drag brakes. I may light the car on fire.
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