LS 441/442ci N/A Questions - Page 3

Miker · 10-03-2013, 08:59 PM

I'm about to roll 100k miles on my stock LS2 bottom end so I've been thinking of a 441/2ci LS7 build. I know you guys have way more real world experience then normal internet people so I want some opinions and suggestions. The square 4.125x4.125 setup is the ultimate for a road race setup. Aiming for 11.5:1 or so compression; I like RPM so even tho it is a torque monster I would like to be able to get at least 7,500 out of it.

Planned parts

New LS7 block
RHS Pro Elite LS7 heads (69cc)
Scat 4.125 Stroke Crank (Opinions and suggestions? Motor will always be N/A so can I go light weight?
Scat 4340 H-beam 6.125 rods
Wiseco -2.8cc Pistons
LS7 head gasket
Lunati High RPM Lifters
ARP Head Bolts (Studs are a PITA with the GTO brake booster)
Fast 102
Nick Williams 102
Ported LSA Oil Pump

I need opinions on Valves and Springs.
Will stock rockers with trunion upgrade work? They are light weight and don't seem to fail like the roller rockers do.
How much injector will I need?
I currently am running a comp cams double roller. I have cam signal issues during startup sometime so I need another option.

Cam would be spec'ed by the builder; I trust him.

4l65e would prob turn into a face plated t56 or maybe a PPG converted 1-4 t56 dogbox.

10-03-2013, 08:59 PM	#1
Miker Senior Member Join Date: Mar 2010 Location: Goose Creek, SC Posts: 811	LS 441/442ci N/A Questions I'm about to roll 100k miles on my stock LS2 bottom end so I've been thinking of a 441/2ci LS7 build. I know you guys have way more real world experience then normal internet people so I want some opinions and suggestions. The square 4.125x4.125 setup is the ultimate for a road race setup. Aiming for 11.5:1 or so compression; I like RPM so even tho it is a torque monster I would like to be able to get at least 7,500 out of it. Planned parts New LS7 block RHS Pro Elite LS7 heads (69cc) Scat 4.125 Stroke Crank (Opinions and suggestions? Motor will always be N/A so can I go light weight? Scat 4340 H-beam 6.125 rods Wiseco -2.8cc Pistons LS7 head gasket Lunati High RPM Lifters ARP Head Bolts (Studs are a PITA with the GTO brake booster) Fast 102 Nick Williams 102 Ported LSA Oil Pump I need opinions on Valves and Springs. Will stock rockers with trunion upgrade work? They are light weight and don't seem to fail like the roller rockers do. How much injector will I need? I currently am running a comp cams double roller. I have cam signal issues during startup sometime so I need another option. Cam would be spec'ed by the builder; I trust him. 4l65e would prob turn into a face plated t56 or maybe a PPG converted 1-4 t56 dogbox. __________________ 06 GTO-aro AutoXer Printing my car's CARFAX uses a lot of toner. Last edited by Miker; 10-03-2013 at 09:01 PM.