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BUILD Broke EF turbo LS SC400 Build


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Well, not a bad day. Drove the car about 170 miles, to work then GLD then home. I wish I got more passes, but on my second (and last pass) I managed a 10.8 @ 128 mph with some tire spin through first. I was even able to data log it
 

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Seen this thing at the track tonight, looked good!!! There are some pix on Facebook I can post on here or pm you if you want that one of the photographers took
 
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Seen this thing at the track tonight, looked good!!! There are some pix on Facebook I can post on here or pm you if you want that one of the photographers took
You should have said hi! I was there by myself, so I just stayed parked in the back. Post up whatever you have :D I only saw one pic from Allan so far.
 

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You should have said hi! I was there by myself, so I just stayed parked in the back. Post up whatever you have :D I only saw one pic from Allan so far.
It was chaotic with trying to get runs in and help with a friend with his car. I was referring to Alan so I'm sure you have seen what he uploaded. Next time I see ya I will make sure to say hi! I was telling my friends how I have followed your build on here lol
 
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It was chaotic with trying to get runs in and help with a friend with his car. I was referring to Alan so I'm sure you have seen what he uploaded. Next time I see ya I will make sure to say hi! I was telling my friends how I have followed your build on here lol
Yeah, I know how it goes. I am sure I will see you out and about. I am always suprised people actually follow the build LOL

So I just started looking over the data, and I can say there is plenty to improve on :D For example I left on 0.2 PSI of boost. I also short shifted 1-2 by about 500 RPM or so. The good news is the fuel pump seems to still be keeping up. Not sure how much it has left, but pressure is staying stable.
 

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Yeah, I know how it goes. I am sure I will see you out and about. I am always suprised people actually follow the build LOL

So I just started looking over the data, and I can say there is plenty to improve on :D For example I left on 0.2 PSI of boost. I also short shifted 1-2 by about 500 RPM or so. The good news is the fuel pump seems to still be keeping up. Not sure how much it has left, but pressure is staying stable.
What are you shifting at? I feel like I’ve been shifting way low on mine
 
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Welp, I went to the track last weekend and had a terribe time. Mainly because I was there ALL DAY and only got in two runs. I can go into the details of that shit show if anyone cares, but Ill skip it for now. The other sucky part was that the car went really slow. My first pass I actually left on a couple lbs of boost, but the car was still dog shit slow. The logs showed I was down on boost a good amount. I gave the car a quick once over since I didnt really have much with me anyway, and then decided to try another pass with the car cooled down. I didn't expect it to fix itself or anything, but I wanted to verify it was down on boost, and work on my launch more. Little did I know I would be in the lanes for over 4 hours (first car in line too) before I got that second run. It ended up blowing the tires off right at the hit. The MPH was better, but it was still slow as fuck. I just left after that, and didnt look at the logs till I got home. Boost was down about the same, everything else looked fine.

Well the car sat all week, just too busy with work. Yesterday some friend came out, so I took them out in the car since neither had seen it even running yet. It sounded weird to me, and looked like it was smoking which it never has. When I got on it it was slow as fuck. Quick glance at the screen showed it was even further down on boost than when I was at the track. When we got back to the house, I got out and spotted the problem right away...



Moved the Supra off the lift and got the SC up in the air for a better look



I think I found the problem :ROFLMAO: Now I need to decide how I want to go about fixing it (so this doesnt happen again) and if I want to try and get it fixed (temporary, or otherwise) to get the car out one last time this year.
 

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Let me guess, you went to Byron?
 
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Let me guess, you went to Byron?
Yeah, which I personally like better than GLD for a handful of reasons. What started the long as fuck wait was someone oiling down the entire track with gear lube. Not the tracks fault, and also terrible to clean up. After that though I should have run pretty quckly and when I didnt that was when I started to get annoyed. When they ran the lane next to me twice I was fucking pissed.
 

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Yeah, which I personally like better than GLD for a handful of reasons. What started the long as fuck wait was someone oiling down the entire track with gear lube. Not the tracks fault, and also terrible to clean up. After that though I should have run pretty quckly and when I didnt that was when I started to get annoyed. When they ran the lane next to me twice I was fucking pissed.
Sounds like a typically run day at Byron to me, sadly.
 

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Out if curiosity is the WG tube and the exhaust pipe made from the same material? Sucks to see a weld fail in that way but at least it should be a simple fix.
 
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Out if curiosity is the WG tube and the exhaust pipe made from the same material? Sucks to see a weld fail in that way but at least it should be a simple fix.
Yeah, they are both stainless. I am not 100% sure the grade of each, but I think they are both 304. What can I say, sucks to suck :D I know I have a lot of room to improve in my welding for sure. I really should spend the money on a better welder, which wont make me any better but also wont hurt.

I need to figure out how I want to fix this. I like that new Motion cast stainless deal, but its for a 60 or 66mm gate, and mine is only a 45. I can of course adapt it down, but I wouldnt want to. Changing to a larger gate is a lot of cost, and probably not needed since its been controling just fine.
 

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Yeah, they are both stainless. I am not 100% sure the grade of each, but I think they are both 304. What can I say, sucks to suck :D I know I have a lot of room to improve in my welding for sure. I really should spend the money on a better welder, which wont make me any better but also wont hurt.

I need to figure out how I want to fix this. I like that new Motion cast stainless deal, but its for a 60 or 66mm gate, and mine is only a 45. I can of course adapt it down, but I wouldnt want to. Changing to a larger gate is a lot of cost, and probably not needed since its been controling just fine.
add a rib? move it in closer for less leverage? double up the pipe there? Put a thicker pipe like a weld el in?

Rando thougts
 

Turbocharged400sbc

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If you did not back Purge it then it's very likely that it oxidized a good bit on the back side contributing to weakness in the heat affected zone. You can do a small little 45 degree gusset to spread the bending loads out but it might not help much unless you fill the pipe with Argon before you weld it
 
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Let me guess, you went to Byron?
add a rib? move it in closer for less leverage? double up the pipe there? Put a thicker pipe like a weld el in?

Rando thougts
Yeah I have had those same thoughs :)

If you did not back Purge it then it's very likely that it oxidized a good bit on the back side contributing to weakness in the heat affected zone. You can do a small little 45 degree gusset to spread the bending loads out but it might not help much unless you fill the pipe with Argon before you weld it
I back purged it.
 

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