416 LS3 Heads and cam help - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

feh_pexoto · 04-29-2026, 03:37 PM

Hello guys, I have an 416 stroker LS3, and I'm willing to upgrade heads and cam.
What would you recommend for 600rwhp while still NA?
Chatgpt (

) recommended Frankestein M311 and a custom cam 255/267 duration .660 lift 113 LSA, is this really appropriate?
Also, what is good practice when changing those? Timing chain only? or gaskets aswell?

joshnmn · 04-30-2026, 06:32 PM

You’re not hitting that mark N/A. 525-535, maybe.

CamaroDreams76 · 04-30-2026, 09:44 PM

Check out Whammo in the last page of this thread. Your looking at a max effort NA build.

https://www.camaro5.com/forums/showt...114824&page=55

1JEWLDSSRS · Yesterday, 10:31 AM

Quote:

Originally Posted by CamaroDreams76

Check out Whammo in the last page of this thread. Your looking at a max effort NA build.

https://www.camaro5.com/forums/showt...114824&page=55

Yep. I would contact Andrew,"acammer", member on the forum who works with GPI and they have a "max effort" kit you can get, and he has it installed on his Camaro. You won't see 600 with an NA build as stated above.

04-29-2026, 03:37 PM	#1
feh_pexoto Drives: 2010 Camaro 2SS w/ RS pack Join Date: Sep 2024 Location: Brazil Posts: 7	416 LS3 Heads and cam help Hello guys, I have an 416 stroker LS3, and I'm willing to upgrade heads and cam. What would you recommend for 600rwhp while still NA? Chatgpt () recommended Frankestein M311 and a custom cam 255/267 duration .660 lift 113 LSA, is this really appropriate? Also, what is good practice when changing those? Timing chain only? or gaskets aswell?

04-30-2026, 09:44 PM	#3
CamaroDreams76 Tri-County Camaro SWFL Drives: 2013 IOM 2SS/RS/1LE Join Date: Apr 2013 Location: South West FL Posts: 3,581 View My Garage	Check out Whammo in the last page of this thread. Your looking at a max effort NA build. https://www.camaro5.com/forums/showt...114824&page=55 __________________ Just bolt ons........ https://www.camaro5.com/forums/showthread.php?t=343023

04-30-2026, 06:32 PM	#2
joshnmn 2&THEHIT Drives: 5th Gen Camaro; 5th Gen Ram 3500 Join Date: Mar 2018 Location: Garner, NC Posts: 1,107 View My Garage	You’re not hitting that mark N/A. 525-535, maybe.