Boost on stock ls3?
Thread Starter
Instructor
Joined: Jan 2015
Posts: 140
Likes: 9
Boost on stock ls3?
I have a stock bottom end ls3 in my 2010 c6. I'm wanting to know how much boost it will hold reliably on pump gas with meth until I can do a forged lsx swap looking at purchasing a procharger stage 2 kit with a blow off valve and F1R head unit I a couple weeks. Also what will the factory fuel injectors and fuel system support. I will be upgrading to a fire triple pump return system with id2000 injectors but was wanting to wait until I do a complete lsx swap
Current mods:
Vengeance racing cam
Btr 660 spring with titanium retainers
Trunion upgrade
Comp hardened push rods
Arp rod bolts
Melting oil pump
C5R timing chain and gear
Fast 102 with fuel rails
Nick Williams 102
Nitrous outlet plate kit with lnc 2000 and window switch
Kooks long tubes 1&7/8 to 3inc
kooks 3" x pipe no cats
Stainless works 3" axle back
Current mods:
Vengeance racing cam
Btr 660 spring with titanium retainers
Trunion upgrade
Comp hardened push rods
Arp rod bolts
Melting oil pump
C5R timing chain and gear
Fast 102 with fuel rails
Nick Williams 102
Nitrous outlet plate kit with lnc 2000 and window switch
Kooks long tubes 1&7/8 to 3inc
kooks 3" x pipe no cats
Stainless works 3" axle back
Le Mans Master
Joined: Dec 2003
Posts: 5,047
Likes: 252
From: San Diego
Hello, the LS3 takes boost well. Now adding F1R to a stock bottom end LS3 will be tricky but can be done. I my opinion I would stay under 8 to 10 psi with meth and a safe tune. I had a F1A Procharger on a stroker motor and it was a monster and the F1R is a larger head unit than the F1A.
Thread Starter
Instructor
Joined: Jan 2015
Posts: 140
Likes: 9
Yeah I'm going run a big pulled and blow off valve along with the current cam in the car which has some overlap to help bleed boost. I think I am regulate it with the waste Gate to keep the boost down. I'm going f1r so I don't out grow the head unit bc I'm going to have a lme 427 lsx built to handle big boost with a 300 shot from my nitrous system I currently have. I want a 1400-1500 hp car on the bottle with boost lol
Intermediate
Joined: Aug 2008
Posts: 46
Likes: 2
i have a supercharged meth injected cam ls3 tuned mild at 673 to tire and 2 days ago put a rod through the side of the block. i keep hearing that doesn't happen with a ls3 but it did. 22000 miles. now i don't know what to put in it. was thinking a ls3 525 crate with no supercharger.
Thread Starter
Instructor
Joined: Jan 2015
Posts: 140
Likes: 9
i have a supercharged meth injected cam ls3 tuned mild at 673 to tire and 2 days ago put a rod through the side of the block. i keep hearing that doesn't happen with a ls3 but it did. 22000 miles. now i don't know what to put in it. was thinking a ls3 525 crate with no supercharger.
Race Director
Joined: Jul 2005
Posts: 12,034
Likes: 3,568
From: Central MO
I've got 69k trouble free MP112 Magnacharged miles at 8-1/2 psi on the LM7 in my Avalanche. It's got to be harder on the engine to push a 6k pound pig off the line than a Vette. I know plenty of people who have had zero issues with 10 psi on a stock LS-based engine. A good tune is the most important item.
Last edited by BadAV; Sep 25, 2015 at 09:21 PM.
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Melting Slicks
Joined: Jun 2006
Posts: 2,492
Likes: 261
From: Miami Florida
i have a supercharged meth injected cam ls3 tuned mild at 673 to tire and 2 days ago put a rod through the side of the block. i keep hearing that doesn't happen with a ls3 but it did. 22000 miles. now i don't know what to put in it. was thinking a ls3 525 crate with no supercharger.
This is an ls3 block lsa pistons and rods ls9 heads mildly hand ported single turbo.