jkwalkercchs

iTrader: (21)

Compression: 64cc - 10.23, 66cc - 9.56, 70cc - 9.77
Compression Height: 1.315
Bore: 3.902
Rod: 6.125
Pin Size: .927 x 2.500 - 118 Gram Pin
Ring Grooves: 1.5mm 1.5mm 3mm
3.0cc Valve Reliefs
Manufactured from Forged 2618 High Strength Alloy.

im totally lost any help would be appreciated
my heads are 57ccs so what would this equal??

405HP_Z06

iTrader: (11)

What bore, stroke, and how far down is the top ring from the piston crown? What head gasket do you plan on running?

jkwalkercchs

iTrader: (21)

stock gm gasket
idk i havent bought them yet i just need a rough draft estimate
stock stroke
that bore size 3.902

jkwalkercchs

iTrader: (21)

can the 5.3 be bored to 3.902

405HP_Z06

iTrader: (11)

The stock bore on the 5.3 is 3.780" so I don't think your going to get to 3.902".

jkwalkercchs

iTrader: (21)

well people get to the ls1 bore how much more is that

405HP_Z06

iTrader: (11)

Stock LS1 bore is 3.898". I'm not familiar with the 5.3, so maybe you can get 3.902".

jkwalkercchs

iTrader: (21)

yea maybe theres alot of cylinder wall on those people bore them to 3.898 all the time

405HP_Z06

iTrader: (11)

Just because people do it doesn't mean much. Has anyone done this and had the bores sonic checked for adequate thickness?

jkwalkercchs

iTrader: (21)

hmm idk u are right
wouldnt that be a slighty bored or maybe even honed ls1 bore

405HP_Z06

iTrader: (11)

3.902 is a honed LS1 bore.

jkwalkercchs

iTrader: (21)

ok so i think that is achievable

JimMueller

iTrader: (9)

I come up with 11.197:1, not accounting for the space between the top ring and the piston crown so it might be a smidgeon lower.

Chamber 57cc
OEM compressed gasket .056
Gasket bore 3.902
Deck clearance .007 above deck
Stroke 3.622
Bore 3.902
Piston 3cc dish
Rod 6.125

jkwalkercchs

iTrader: (21)

i think they are flat tops

405HP_Z06

iTrader: (11)

Assumptions:
1. stock 5.7L head gasket
2. piston .007 above the deck

jkwalkercchs

iTrader: (21)

hey thats cool where did u get that?
thats totally achievable on pump gas with a good tune right

405HP_Z06

iTrader: (11)

Compression Ratio Calculator - Performance Trends,Inc.

11.2:1 is no problem on pump gas assuming the tune is right. I'm currently running 11.31:1 and have no issues whatsoever.

jkwalkercchs

iTrader: (21)

well theres a gas station in town they sale 97 would it hurt to mix a couple gallons with 93

405HP_Z06

iTrader: (11)

Wouldn't hurt, but won't help either unless you optimize your tune for it. If you have issues with knock or timing retard, than it would help. Otherwise, your wasting your money.

jkwalkercchs

iTrader: (21)

o ok
im still tryin to decide if i want this motor in my truck or a gbody