Optimum Turbo Street 6 speed Setup?
Thread Starter
Joined: Nov 2001
Posts: 8,259
Likes: 4
From: Valrico, Florida
Optimum Turbo Street 6 speed Setup? I am just curious what you guys would consider the best street turbo motor setup for a 6 speed? Say your horsepower goals are 800rwhp MAX on pump gas. Which motor would you choose? 346 LS1, 364 LS2, 370 LQ9, 402 LS2, or 408 LQ9. Say this motor was going in a C5. Also try to guess how much boost you would need for each to reach 800rwhp MAX on pump gas. Assume optimum heads and cam.
346ci LS1=xxpsi=800rwhp on pump gas
364ci LS2=xxpsi=800rwhp on pump gas
370ci LQ9=xxpsi=800rwhp on pump gas
402ci LS2=xxpsi=800rwhp on pump gas
408ci LQ9=xxpsi=800rwhp on pump gas
Which would you consider would give you the most enjoyment.
346ci LS1=xxpsi=800rwhp on pump gas
364ci LS2=xxpsi=800rwhp on pump gas
370ci LQ9=xxpsi=800rwhp on pump gas
402ci LS2=xxpsi=800rwhp on pump gas
408ci LQ9=xxpsi=800rwhp on pump gas
Which would you consider would give you the most enjoyment.
The bigger the motor, the bigger the turbo needed. With a 408, youd need a 88mm to feed the air requirements and thats a BIG turbo to fit in a Vette. Id stay with a 346 LS1. Its proven to hit that mark many times with a T76 with meth. PSI, isnt important. Its CFM. A lot of thing will determine the PSi needed, such as intercooler, pipe size, routing, restrictions, etc..
I like option 2, the ls2 364. I know the stock LS2 is strong engine powerwise, and I think a turbo version would be a great setup. Basically same benefits of a 346 with a little extra power.
FWIW, I want that combo for my car in the future, with a good set of heads (maybe AFR) and a well matched cam I think it would make awesome power.
FWIW, I want that combo for my car in the future, with a good set of heads (maybe AFR) and a well matched cam I think it would make awesome power.
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TECH Enthusiast
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Bigger is better for a street turbo motor IMHO. More cubes mean quicker spool and better off-boost drivability. I'm very close to starting a 444 inch build now that blew my 414 incher. If 414 is better than 360, then 444 has to be better than 414.
Originally Posted by eviltwins
Bigger is better for a street turbo motor IMHO. More cubes mean quicker spool and better off-boost drivability. I'm very close to starting a 444 inch build now that blew my 414 incher. If 414 is better than 360, then 444 has to be better than 414.
and a 444? what block and what stroke is that I have a 422 using a slp block and it needed a little prep work Not bashing slp it was a 402 had a golden chance to up the cubes Befor I even used the motor
A smaller bore will be less prone to detonation. This is one of the reasons the Mod Motors do so well on boost. I'd say either 346 or all stroke 383.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
What I would build and why...
+408ci, 8.5:1 compression
+AFR 225's or comparable head
+Twin 66mm turbos
+LS2 90mm OEM intake
I'd go bigger turbos becaus a little lag would be a good thing, my 02 Z06 on drag radials would be a deathtrap if it made crazy midrange power. And you can't fit a big single front mounted turbo on C5's.
+408ci, 8.5:1 compression
+AFR 225's or comparable head
+Twin 66mm turbos
+LS2 90mm OEM intake
I'd go bigger turbos becaus a little lag would be a good thing, my 02 Z06 on drag radials would be a deathtrap if it made crazy midrange power. And you can't fit a big single front mounted turbo on C5's.
Thread Starter
Joined: Nov 2001
Posts: 8,259
Likes: 4
From: Valrico, Florida
Originally Posted by Pro Stock John
What I would build and why...
+408ci, 8.5:1 compression
+AFR 225's or comparable head
+Twin 66mm turbos
+LS2 90mm OEM intake
I'd go bigger turbos becaus a little lag would be a good thing, my 02 Z06 on drag radials would be a deathtrap if it made crazy midrange power. And you can't fit a big single front mounted turbo on C5's.
+408ci, 8.5:1 compression
+AFR 225's or comparable head
+Twin 66mm turbos
+LS2 90mm OEM intake
I'd go bigger turbos becaus a little lag would be a good thing, my 02 Z06 on drag radials would be a deathtrap if it made crazy midrange power. And you can't fit a big single front mounted turbo on C5's.
