some turbo ???'s
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On The Tree
Joined: May 2005
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From: GA
some turbo ???'s I'm getting ready to go the dark side! I'm swapping my car from N2O to turbo.
95' T/A lt1/ m6 /12 bolt moser w/ 4:10's
stock pcm, car shouldn't see over 7,000 rpm's
my goal is around 800rwhp streetable
Mods that I will be running are:
forged 383 LT1
ported trick flow heads (should flow 300+ on the intake)
port matched lt1 intake
my questions are:
What type and size turbo should I run?
Should I run solid roller or hydra-rev kit?
What would be a good size cam?
What comp. ratio should I run?
All the turbo and innercooling piping will be custom fabed.
I understand that this will not be a smooth street car so don't hold back!
95' T/A lt1/ m6 /12 bolt moser w/ 4:10's
stock pcm, car shouldn't see over 7,000 rpm's
my goal is around 800rwhp streetable
Mods that I will be running are:
forged 383 LT1
ported trick flow heads (should flow 300+ on the intake)
port matched lt1 intake
my questions are:
What type and size turbo should I run?
Should I run solid roller or hydra-rev kit?
What would be a good size cam?
What comp. ratio should I run?
All the turbo and innercooling piping will be custom fabed.
I understand that this will not be a smooth street car so don't hold back!
well that depends on if you want it on race fuel or pump gas.
if its pump gas you will prob neet a gt55 or somewhat bigger on that size motor as im expecting around 700 rwhp on pump in my 408 turbo. if its race fuel, you can prob get away with a 76gts ( i think thats it).
decent cam would be like a 228/228 or maybe bigger depending on if you have 91 or 93.
good compression ratio will prob be 8.5 or higher, maybe 9:1 that way you have the bigger cam to make up for the drop in compression.
Thats my 2 cents...
if its pump gas you will prob neet a gt55 or somewhat bigger on that size motor as im expecting around 700 rwhp on pump in my 408 turbo. if its race fuel, you can prob get away with a 76gts ( i think thats it).
decent cam would be like a 228/228 or maybe bigger depending on if you have 91 or 93.
good compression ratio will prob be 8.5 or higher, maybe 9:1 that way you have the bigger cam to make up for the drop in compression.
Thats my 2 cents...
Originally Posted by lt1fbody355
I'm getting ready to go the dark side! I'm swapping my car from N2O to turbo.
95' T/A lt1/ m6 /12 bolt moser w/ 4:10's
stock pcm, car shouldn't see over 7,000 rpm's
my goal is around 800rwhp streetable
Mods that I will be running are:
forged 383 LT1
ported trick flow heads (should flow 300+ on the intake)
port matched lt1 intake
my questions are:
What type and size turbo should I run?
Should I run solid roller or hydra-rev kit?
What would be a good size cam?
What comp. ratio should I run?
All the turbo and innercooling piping will be custom fabed.
I understand that this will not be a smooth street car so don't hold back!
95' T/A lt1/ m6 /12 bolt moser w/ 4:10's
stock pcm, car shouldn't see over 7,000 rpm's
my goal is around 800rwhp streetable
Mods that I will be running are:
forged 383 LT1
ported trick flow heads (should flow 300+ on the intake)
port matched lt1 intake
my questions are:
What type and size turbo should I run?
Should I run solid roller or hydra-rev kit?
What would be a good size cam?
What comp. ratio should I run?
All the turbo and innercooling piping will be custom fabed.
I understand that this will not be a smooth street car so don't hold back!
I am currently doing a 1995 Z28 M6 383 LT1 with homemade T76 Q tim setup. I wanted little to no lag and 700rwhp @ 12-15psi on pump gas. If I could have started over I would have done a 355ci so th turbo will be more efficient, but I got my fully forged 383 sitting here...so its a go! I am using LE ported AFR210's/LT4 manifold/monoblade TB and will probably get a 226/226 cam. If you have any questions regarding my combo pm me.
if its for streetish driving, id ge the t-76gts, it will spool faster, make almost the same HP as a 88 and gets you into power sooner.
theres no reason not to get the 76gts in my opnion. hell i did.
theres no reason not to get the 76gts in my opnion. hell i did.
Originally Posted by SS00Blue
street needs T76
Track needs T-88
There is NO comparison between the two. The 88 will beat down the 76 by 300hp on a mid-range cube (370 LS2 and 383 LT1),
Track needs T-88
There is NO comparison between the two. The 88 will beat down the 76 by 300hp on a mid-range cube (370 LS2 and 383 LT1),
I believe the difference in the PTK car was 60rwhp between the two, but the lag outweighs the power difference. Here are the track mph I found with the same vehicle:
150.29mph with the T76 @ 20psi
156mph with the T88 @ 24psi
Less boost was run on the smaller turbo too...
So much for 300hp difference on a 355ci anyway...
Last edited by RealQuick; Aug 26, 2005 at 11:28 AM.
Originally Posted by RealQuick
Really? PTK made almost the exact same power on their 355ci PTK setup T76 GTS versus the T88. You have any data to back up what your saying??
I believe the difference in the PTK car was 60rwhp between the two, but the lag outweighs the power difference. Here are the track mph I found with the same vehicle:
150.29mph with the T76 @ 20psi
156mph with the T88 @ 24psi
Less boost was run on the smaller turbo too...
So much for 300hp difference on a 355ci anyway...
I believe the difference in the PTK car was 60rwhp between the two, but the lag outweighs the power difference. Here are the track mph I found with the same vehicle:
150.29mph with the T76 @ 20psi
156mph with the T88 @ 24psi
Less boost was run on the smaller turbo too...
So much for 300hp difference on a 355ci anyway...
well isnt that interesting.
I thought I remembered this info from somewhere, but I didnt care to go look it up.
Also Jose reccomended the T-76GTS as he thought it was a better turbo all around for the setup I had. Hmm guess it all applies.
wow
Ed
firebird455@gmail.com
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Originally Posted by JZ 97 SS 1500
76GTS for the street and strip. 88 if you want to get stupid 
The peak #'s for the 76GTS and PTE88 were both at 24psi. Now what is deceptive is the 987rwhp with the 76GTS was a spike to 24psi, it could not hold anymore, and the boost would drop back to 20-22 on the top side after the intial spike. The 88 though would climb to 24psi as well, but held strong to the redline. So the peaks were similar, but the area under the curve above the peak hp was better for the 88. BUT, on the street the 76GTS manners and response are much more friendly on a daily basis. I have an 88 on my car and though its an awesome piece for making stupid power, if I was looking for a nice combo of both street and strip, I would go 76GTS.
Jose
Jose
As for getting a larger downpipe through the K-member, it maybe possible, but its going to be dang tight. As for a GT47, no way will you get it through the K-member and keep all the accessories. Just ask Mightymouse, he is running a 3.5" DP and he says the clearence is very tight as is. A 5" DP....no way.
Jose
Jose
TECH Fanatic
Joined: Mar 2002
Posts: 1,044
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I can't explain the power seen being the same for both turbo unless it's the kit or tuning. Definitely not the turbo. As for them being the "same" somehow, I know of a high eight second car doing it easily with the 88. But the kit was designed correctly. Never seen a slammer do eights with any kind of 76.
Jose knows what he's talking about. The 88 can make STUPID power.
I stand corrected about the difference in ratings. Precision rates the mid-88 at 1250hp, and the GTS 76 at 1100. It's only 150 difference, not 300. Sorry.
SC-
Jose knows what he's talking about. The 88 can make STUPID power.
I stand corrected about the difference in ratings. Precision rates the mid-88 at 1250hp, and the GTS 76 at 1100. It's only 150 difference, not 300. Sorry.
SC-