Stepping Up My Game
Thread Starter
Safety Car
Joined: Apr 2007
Posts: 3,582
Likes: 137
From: SoCal CA
Stepping Up My Game
Well I finally pulled the trigger today on upgrading my head unit and ordered a YSI along with an 8rib conversion. Ordered it with a 3.0 pulley to be in the 15-18psi range. See how close that gets me to 800-850rwhp on e85. Currently I'm at 700rwhp at 11psi with my V2si. What do you guys think, should I be in that ballpark?
2002 coupe. Motor is a LS3 (still 376ci) with forged pistons and rods. Stock heads and intake. 1 7/8 headers.
I'm pretty excited, car should be a beast.
2002 coupe. Motor is a LS3 (still 376ci) with forged pistons and rods. Stock heads and intake. 1 7/8 headers.
I'm pretty excited, car should be a beast.
Racer
Joined: Mar 2009
Posts: 380
Likes: 5
From: Sanford NC
I switched from the V3 Si with 8 rib and overdrive balancer making 14 psi (3.47 pulley) to the YSI and a 3.125 pulley and it now makes 19-20 psi. Motor is a 347 with rods and pistons, and stock heads. Was well worth it also couldn't be happier. Good luck to ya. I wish E85 was more readily available where I live. I don't think you will have an issue making 800-850 RWHP.
AMP Racing
Joined: Aug 2006
Posts: 10,757
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
My buddy has a forged 347. Trickflow 220s ported by our local guy.
Tooley cam.
YSi 8"/3" pulleys
C6Z 6 speed
C6Z 3.42 diff.
E85
22lbs boost.
920 to the tire.
Good luck and have fun with the upgrade!
Tooley cam.
YSi 8"/3" pulleys
C6Z 6 speed
C6Z 3.42 diff.
E85
22lbs boost.
920 to the tire.
Good luck and have fun with the upgrade!
Last edited by C5 Pete; Mar 28, 2016 at 10:18 PM.
Thread Starter
Safety Car
Joined: Apr 2007
Posts: 3,582
Likes: 137
From: SoCal CA
I switched from the V3 Si with 8 rib and overdrive balancer making 14 psi (3.47 pulley) to the YSI and a 3.125 pulley and it now makes 19-20 psi. Motor is a 347 with rods and pistons, and stock heads. Was well worth it also couldn't be happier. Good luck to ya. I wish E85 was more readily available where I live. I don't think you will have an issue making 800-850 RWHP.
