1320Video

I have a 2000 Mustang GT SOHC 4.6

I was wondering what the stock compression ratio is on the motor?

I've heard 9.2 and I've heard 10.5

Thanks!

P.S. I have searched on these forums and on google and couldn't find solid facts.

1320Video

anyone?

Mustoke

info i received from a guy in ford power train:
99-00 9.0 to 1
01-04 9.4 to 1
from other sources 01's might be 10.1 to 1, if they have the same heads as the bullits.
then again i could be wrong. but i looked, i might have the jpeg of the ford guys' info somewhere.
Mustoke

grimwolf

a guy i work with has a mach1 2004 he says my car is a 8 to 1 and his is a 9 to 1...i have a gt 2004 so
i dono thats just what i heard im probly wrong lol

1320Video

noone seems to know for sure... I've read a couple places that the P.I. heads that the 99-00 have will raise your CR

But that could be wrong still

redass02gt

if you take a non-pi and do a pi swap, your cr will be higher than a 99+ gt.
I was under the impression the all 99-04 4.6 motors were the same specs.

redass02gt

http://www.stangbangers.com/4.6L_OHC_Engine.htm

it says 9.0:1, published in 2002.

jdaniel

Thats wrong. The compression ratio was 9.1:1 from 99 to 01 and they upped it to 9.4:1 in 2002 to 2004 and now the 2005 models have a 9.8:1 CR.

Thats your answer.

redass02gt

last time I believe anything from Mustang Times. friggin' garbagio. Why'd they change the compression ratio?

Guest

When did you get a Mustang, Kyle?