Lq4 compression ratio with stock 706 heads?
#1
Lq4 compression ratio with stock 706 heads?
Been trying to figure out what the compression ratio will be with a lq4 with stock .051 6.0 head gaskets and a set of stock 706 heads ?
Lq4 compression ratio with 317's with a 71cc chamber is 9.6:1
706 heads are exactly 10ccs less . 61cc .
Why can I not fugure this out lol
Am I just stupid today ?
It would go up to around 10.5:1 right or am I way off
Lq4 compression ratio with 317's with a 71cc chamber is 9.6:1
706 heads are exactly 10ccs less . 61cc .
Why can I not fugure this out lol
Am I just stupid today ?
It would go up to around 10.5:1 right or am I way off
#2
TECH Senior Member
Check out Summit's Compression calculator. Easy to use (even I figured it out lol).
Using that, I come up with 10.72:1
Using that, I come up with 10.72:1
#3
TECH Fanatic
iTrader: (7)
Been trying to figure out what the compression ratio will be with a lq4 with stock .051 6.0 head gaskets and a set of stock 706 heads ?
Lq4 compression ratio with 317's with a 71cc chamber is 9.6:1
706 heads are exactly 10ccs less . 61cc .
Why can I not fugure this out lol
Am I just stupid today ?
It would go up to around 10.5:1 right or am I way off
Lq4 compression ratio with 317's with a 71cc chamber is 9.6:1
706 heads are exactly 10ccs less . 61cc .
Why can I not fugure this out lol
Am I just stupid today ?
It would go up to around 10.5:1 right or am I way off
#4
12 Second Club
I came up with 11.43:1 compression with the .051 head gaskets. The LQ4/9 has flat top pistons, so there's no "piston top volume". I used this calculator: https://www.rbracing-rsr.com/compstaticcalc.html
#5
TECH Senior Member
Don't forget to figure the piston will be OUT of the hole .004. Not everyone knows this.
#6
TECH Resident
I came up with 11.43:1 compression with the .051 head gaskets. The LQ4/9 has flat top pistons, so there's no "piston top volume". I used this calculator: https://www.rbracing-rsr.com/compstaticcalc.html
#7
TECH Senior Member
Summit's spec page shows 6.7cc dish on LQ4 pistons.
Trending Topics
#8
Been trying to figure out what the compression ratio will be with a lq4 with stock .051 6.0 head gaskets and a set of stock 706 heads ?
Lq4 compression ratio with 317's with a 71cc chamber is 9.6:1
706 heads are exactly 10ccs less . 61cc .
Why can I not fugure this out lol
Am I just stupid today ?
It would go up to around 10.5:1 right or am I way off
Lq4 compression ratio with 317's with a 71cc chamber is 9.6:1
706 heads are exactly 10ccs less . 61cc .
Why can I not fugure this out lol
Am I just stupid today ?
It would go up to around 10.5:1 right or am I way off
Last edited by andy burdess; 03-21-2019 at 09:02 PM.