Zombie

iTrader: (2)

This is my old t67 at 10 psi vs the T76 at 14 psi

lock down

nice numbers

CAT3

iTrader: (9)

no dyno reading expert, why are there two big dips? Will be nice without those in there and noticeably better pulling I bet. Congrats.

99SS-T

iTrader: (5)

ya what the hell is that dip? Otherwise that is some nice numbers. Kinda confusing since you have the dark blue line as the HP bt the dark red line as the TQ. How come you spun it alot higher with the old turbo but cut off at 6k with the new one? GL man


John

MTBDOC

iTrader: (1)

IMPRESSIVE!!! Your numbers are better from 3000rpm up...so this bigger turbo is spooling well.

Having looked at a number of your posts, I am not clear about the 'custom mounted' part...what have you done differently on your plumbing? I am curious as I've just finished my STS install on my LS2GTO. I went w/ a GT67 turbo...and have both .81 and .96 exhaust housings to play with for comparison. This is the first STS on an LS2 engine...so the 'optimum' is unknown. The hard part is waiting for another week until I get this thing tuned down in Mobile @ RWTD...don't like having to 'baby' it around.

LSs1Power

iTrader: (5)

If you are running a EBC they can cause dips like that if you passed the limit you set them at. For example if you set them for 14psi and they see 15psi they will pull boost out which can cause dips like that. Just my 02 cent.

Zombie

iTrader: (2)

the dips are where it spun on the dyno. It needed to be strapped down better. I stopped the pull early because it didn't feel right, I also noticed it was starting to lean out pretty good.

Zombie

iTrader: (2)

The custom part of my setup is basically the whole setup now. It started off as a STS kit, but most of the original stuff has been changed. I only have one pipe left on the car that was originally STS. Everything else including the oil pump is different.

The .96 a/r housing is probably going to be too big for the setup. The .81 should work nice though. If I was going to reccomend a turbo for a LS1 based car i'd suggest a .68 a/r T70. The .68 housing makes it a lot more fun to drive. Good luck with the LS2 project. If you can lower the comp down to somewhere in the 9's it will be a lot more fun. The other choice is more octane. Methanol is AMAZING.

CAT3

iTrader: (9)

Zombie, what was the max you dyno'd or ran the T67 at? I know it was a stock bottom. Thanks

Charlie

Zombie

iTrader: (2)

507 on 10 psi, i was pushing it to 15-16 at times though, but never ran at the track or dyno'd. Most of the time I ran at the track was 13 and sometimes 14 if it would get there.

I'm still on a stock bottom end.

gametech

iTrader: (1)

As far as street driving impressions, did the 76 give up any power on the low end? On my gto I'm not going for best track times, I'm going for most fun daily driver.

Zombie

iTrader: (2)

Actually feels like it increased, according to the dyno I posted it did. I just put the 76 on to see how well it would work with the .70 a/r since on the .81 a/r it wouldn't spool very well at all due to the turbine wheel being so large and some leaks on my setup.

This turbo will be going on my 408 when ever I build it.

RealQuick

iTrader: (14)

nice!

JZ 97 SS 1500

iTrader: (2)

Get a smaller A/R on that thing. You have a crazy amount of lag for a 346ci motor. Here is a 2JZ with a 76GTS, non Ball bearing turbo and .81A/R.

Jose

Zombie

iTrader: (2)

The housings cost way to much $300 I'm use to them being much cheaper. I'll live with it the way it is for now. My solution is not a smaller housing, just a larger motor. I'm probably going to leave the .70 a/r on it initially and see how it works. I'll most likely tap into the exhaust and install a gage so I can monitor back pressure.

I'm still having wastegate issues. I have a 9 psi spring in there but it's only showing the same as my 6 psi spring. Time for a 11psi spring to see if that increases spool. The car will not hit full boost on the dyno.

I agree with you though, it could use a smaller housing. I think all the STS 67's should have a .68 housing to be sized properly. The .81/s they are shipping them with just seem to laggy for a p-trim 67.

It's one of the down sides to having the turbo in the back. The plus side is that I have a turbo on my car though and thats a HUGE plus

JZ 97 SS 1500

iTrader: (2)

Ditching the R-trim wheel would help a good bit. Its a very heavy wheel/shaft combo.

Jose

Zombie

iTrader: (2)

I agree, a Q or S wheel would be better, but I will have a 408 pushing it by the end of the year and I already own this setup.

socalstreetracer

iTrader: (4)

sweet numbers, how much timing are you running?

red91z

iTrader: (25)

I run the .96 housing on the 67 turbo and it made almost 20HP over the .81. That is on a stock long block ls1.

Zombie

iTrader: (2)

20 peak, you traded area under the curve. Area under the curve is way more important than a big peak number.