700 HP Yenko and Panther by SLP.. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Reelgrinder · 07-20-2015, 07:40 AM

Why are most threads here and the vette forums saying not to supercharge the 427 LS7's because the thin cylinder walls yet SLP does it.. Or is it because they stay at a certain power level?

BTW what is safe for a LS7 block.. not the internals psi or hp?

I assume the liners are somewhat better in a LS7 than a LS3 since most people only go to max 4.080 when supercharging LS3's and don't take then to 4.125?

I was thinking one of these since most of the work is done tha I want to do!

Unreal · 07-20-2015, 09:47 AM

Liners are worse. They just have different, thinner liners. LS3 can take a lot more power. That being said, Ls7 block isn't as weak as some make it out to be. You can make 800-850rwhp with forged parts and a good tune, but there is ZERO reason to buy one to build for a FI motor compared to all the other options. The blocks are not cheap. Just get an aluminum truck motor/ls2/ls3 and sleeve it, and it is still less than a stock ls7 block and can now handle 1500rwhp.

CamaroSS45 · 07-26-2015, 03:45 PM

ERL

07-20-2015, 07:40 AM	#1
Reelgrinder Drives: 2016 SS Join Date: Oct 2014 Location: DFW Posts: 228	700 HP Yenko and Panther by SLP.. Why are most threads here and the vette forums saying not to supercharge the 427 LS7's because the thin cylinder walls yet SLP does it.. Or is it because they stay at a certain power level? BTW what is safe for a LS7 block.. not the internals psi or hp? I assume the liners are somewhat better in a LS7 than a LS3 since most people only go to max 4.080 when supercharging LS3's and don't take then to 4.125? I was thinking one of these since most of the work is done tha I want to do! __________________ 2016 SS with Eforce 2300 Borla Headers Borla Atak

07-20-2015, 09:47 AM	#2
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Liners are worse. They just have different, thinner liners. LS3 can take a lot more power. That being said, Ls7 block isn't as weak as some make it out to be. You can make 800-850rwhp with forged parts and a good tune, but there is ZERO reason to buy one to build for a FI motor compared to all the other options. The blocks are not cheap. Just get an aluminum truck motor/ls2/ls3 and sleeve it, and it is still less than a stock ls7 block and can now handle 1500rwhp. __________________ Nick Corvette Z06 -1200ish rwhp

07-26-2015, 03:45 PM	#3
CamaroSS45 Annihilator Drives: 2012 45th ERL-427 F1X Join Date: Aug 2011 Location: KY Posts: 334	ERL __________________ ERL M3 Superdeck 427 Forged, Dragon Slayer Crank, Black Label Heads : ProCharger F1X Cog - Holley HighRam : Jakes4L80e CircleD - DSS 9" 1400 axles/shaft, BMR Suspension : Extreme Innovations 15 : Squash, Bosch 127lb FI : ALKY Twin Meth