Garrett GT45 single turbo ls1
05-14-2008, 08:24 PM
#7
i have the gt42-76 1.12 ar.
I dont see how people can say it should be fine to 8 psi or so... 8 psi is cool with a tc76, but with a s91 8 psi is not gonna be cool. People usually say stock ls1's are safeish to around 500 whp. Id imagine 5-6 psi from a gt45 is about all that i would do safely on a stock ls1. And the turbo is going to be barely working at that point. I understand the idea of doing a nice turbo that doesn't need to be upgraded then doing the motor down the line, but the turo will spool on the slow side, and on a tc76 you can easily hit 700+ to the wheels.. Id say figure out what you want and go for it. If you had a built motor get the gt45
Just my 2 cents..
Chris
Ps @ 6psi without an air filter/ and with my valve springs fixed im damn close to 500rwhp on a mustang dyno through an m6 with 4.10 gears.. 8 psi should put me mid 5's easy. I will probably tune it very rich, and safeish around 500.
I dont see how people can say it should be fine to 8 psi or so... 8 psi is cool with a tc76, but with a s91 8 psi is not gonna be cool. People usually say stock ls1's are safeish to around 500 whp. Id imagine 5-6 psi from a gt45 is about all that i would do safely on a stock ls1. And the turbo is going to be barely working at that point. I understand the idea of doing a nice turbo that doesn't need to be upgraded then doing the motor down the line, but the turo will spool on the slow side, and on a tc76 you can easily hit 700+ to the wheels.. Id say figure out what you want and go for it. If you had a built motor get the gt45
Just my 2 cents..
Chris
Ps @ 6psi without an air filter/ and with my valve springs fixed im damn close to 500rwhp on a mustang dyno through an m6 with 4.10 gears.. 8 psi should put me mid 5's easy. I will probably tune it very rich, and safeish around 500.
Trending Topics
05-15-2008, 07:31 PM
#11
Staging Lane
Thread Starter
Join Date: Nov 2006
Location: illinois
Posts: 77
Likes: 0
Received 0 Likes
on
0 Posts
Im going to build an ls1 block and upgrade many other things and should take me about 2 months after the turbo is on. And i plan on getting around 800+ hp by fall
05-15-2008, 11:00 PM
#12
Banned
iTrader: (2)
Join Date: Feb 2004
Location: Springfield Mo
Posts: 250
Likes: 0
Received 0 Likes
on
0 Posts
My lil orange car has been on 13psi on a T6 gt47-80 numerous times, and on 10 almost everyday....on a 100% stock bottom end 6.0 that had 108k miles on it when pulled and just LOVES IT!!! and thats with l92 heads so she is movin some air.
