70TWO NOVA

iTrader: (2)

Hey guys, I finished the build on a 5.3 LM7 and was curious what kind of HP and TQ numbers you think it would put out to the flywheel.

The specs;
2004 LM7 bottom end.
4.8L speed pro flat top pistons (static CR approx; 9.7:1)
ARP rod bolts
317 heads milled .030" (approx 66cc chambers now)
LS6 "yellow" springs
LS7 lifters
.730" comp cam pushrods
.051" thick LS2 head gaskets
02+ LS6 Cam (204/218 dur. @ .050", .551"/.547" lift, 117 LSA)
LS6 Intake manifold and injectors
Ported LS6 throttle body
LS1 coils/wires
Edelbrock Long tube headers
2 1/2" exh with H-pipe

I have heard so many "ideas" of what people think it will make, I would just like some better educated estimates of what you guys think this combo will make.

Steve68

iTrader: (23)

I'll bid 400-430HP.

Pocket

iTrader: (22)

Nah

4.8 pistons bump up compression, large chamber heads drop it back down. Large bore gaskets drop it a tad farther. Should be right at or just under stock CR for a LM7

Only real stand out mods are LS6 cam, LS6 intake, ported TB and LTs. Rest are supporting. Mild 5.3 still

70TWO NOVA

iTrader: (2)

So what are you saying? what do you think it will make? I know for a fact the cr is not right at stock 5.3. Its def lower like i said 9.75:1. The heads are about 5ccs larger than the stock 5.3s