1slow01Z71

iTrader: (36)

3.622 stroke you should bore it to 3.905 which is the standard aftermarket piston bore for the LS1s. You can throw up to a 4" stroke, I think the 4.100 like what Im running you would have to clearance the bottoms of the cylinders for the rod bolts.

SRT10KLLR

iTrader: (11)

Yes that is the soone(hopefully) to be released 427ci(LS7) Silverado.

SRT10KLLR

iTrader: (11)

OK so the 4" stroke with the 3.905 bore will give me 393ci.

What is the stock cr and should I change it? I plan on only going about 15 lbs of boost with the STS kit. I have read that the stock block can easily handle 10 psi and with proper tune 15-20 is possible.

SRT10KLLR

iTrader: (11)

Can I keep the stock cr and still do 10-15 psi safely? I would prefer this because I would have more pep off boost. If I have to lower cr to be safe though I will do it.

Stoichiometric

iTrader: (10)

If you were forged @ 9:1 you could do 15psi. That would be a killer set-up.

TurboBerserker

iTrader: (1)

SRT10 - what's the stock compression? I ran 10psi on 10.1:1 all day and all night. No intercooler then either I had meth and tuned myself, though.

I wouldn't go 15psi on a stock low end.

SRT10KLLR

iTrader: (11)

The 5.3 has a 10:1 cr then? Is 15 psi ok with a 9.5:1 cr and an intercooler? I might add a meth kit also.

If I add a meth kit would it damage any sensors(MAP, MAF, AIT etc.) that come after it?

TurboBerserker

iTrader: (1)

Not sure what the 5.3 has. The LQ9 (HO 6.0) is 10.1:1.

Nope meth won't damage a thing. Run 100% imo.

SRT10KLLR

iTrader: (11)

How is your FLT Level 5 holding up. Everyone says go with the 80 conversion but I was hoping to not go through the expense or hastle.

SRT10KLLR

iTrader: (11)

I came accross a LQ4(iron 6.0) for $600 plus $200 for the heads if I want them. Is that a good deal? Should I use the heads as is or have them p&P? Would there be any benefit since I will be runing 15 psi?

What intake would you guys recommend?