hello all!
getting my forged pistons soon and jus wondered what compression ratio i should go for?
i have a gt3071r turbo, hks 264 cams, 800cc side feeds, rmr inlet manifold and want to make around 400bhp! rev2!
recomendations cheers!
piston compression ratio
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Century Motorsport
- Posts: 3103
- Joined: Wed Oct 12, 2005 6:03 pm
- Location: Fenny Compton (Warwickshire)
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Re: piston compression ratio
Up to how you want to build it really.
Everyone has their own views.
I'd personally say go with 9.0:1 but the next person may recommend 8.0:1..
Everyone has their own views. I'd personally say go with 9.0:1 but the next person may recommend 8.0:1
..Builders of the the UK's first 9second MR2 - 9.722 @ 148 MPH ----- 07947883103 ---- www.centurymotorsport.com
- 9.722 @ 148 MPH ----- 07947883103 ---- www.centurymotorsport.comRe: piston compression ratio
And just to comelette the set, I went for 8.5:1 
January 2014
May 2015
Still in the garage...
May 2015
just have this niggling thought that if I rip out the wiring, then the car will never get out of the garage again.
Still in the garage.
..Re: piston compression ratio
WTF is comelette! Complete!
January 2014
May 2015
Still in the garage...
May 2015
just have this niggling thought that if I rip out the wiring, then the car will never get out of the garage again.
Still in the garage.
..-
Fourveesix
- Posts: 110
- Joined: Mon Nov 27, 2006 11:35 am
Re: piston compression ratio
Base it on a known good specification id say, at least you stand a good chance of achieving what you want rather than trying to guesstimate it. 
Re: piston compression ratio
Century Motorsport wrote:Up to how you want to build it really.
I'd personally say go with 9.0:1 but the next person may recommend 8.0:1
this.
Re: piston compression ratio
You have to design the engine to start with. Once all that work is done it will come up with the c/r you will need.
You cannot just pick a number out of the air and no two engine designs will be the same so any information you get here will just be guessing.
If you are going to run on road fuel with stock revs then 8.0:1 will be on the high side of what you need
Once all that work is done it will come up with the c/r you will need.You cannot just pick a number out of the air and no two engine designs will be the same so any information you get here will just be guessing.
If you are going to run on road fuel with stock revs then 8.0:1 will be on the high side of what you need
Designer for turbo set ups on F1 cars, and Nitrous Oxide Systems of the USA in the 80s
