cheekychimp
Well-known member
I'd be interested to hear what compression ratios most of you are using and specifically if you are using a higher than standard compression ratio together with a little info on your setup (i.e. displacement, type of fuel, type of turbocharger, amount of boost pressure you run etc).
I understand the basic principles involved here and I realize that guys running large snails at very high boost pressures are going to want lower compression pistons, I'm just wondering how far people have actually gone 9.5:1, 10:1, 10.5:1 or higher and specifically what the driving characteristics were like and if it was worth the effort to do it and tune it.
FWIW I'm really trying to pep up the driving characteristics of the daily driver after a lot of consideration and short of going to a twin scroll setup or a six speed transmission, I think I'm getting there. I'm just wondering if going higher than 8.8:1 (or whatever it is the EVO pistons are rated at) is a viable option, or if it is going to create more problems that it solves. I'm really looking at improving the idle to 3,000 rpm area and short of going stroker or adding compression I'm not sure what else I can do here. Any tuning tricks with timing or fueling that I could utilize if I installed DSMLink or ECMLink on this car?
I understand the basic principles involved here and I realize that guys running large snails at very high boost pressures are going to want lower compression pistons, I'm just wondering how far people have actually gone 9.5:1, 10:1, 10.5:1 or higher and specifically what the driving characteristics were like and if it was worth the effort to do it and tune it.
FWIW I'm really trying to pep up the driving characteristics of the daily driver after a lot of consideration and short of going to a twin scroll setup or a six speed transmission, I think I'm getting there. I'm just wondering if going higher than 8.8:1 (or whatever it is the EVO pistons are rated at) is a viable option, or if it is going to create more problems that it solves. I'm really looking at improving the idle to 3,000 rpm area and short of going stroker or adding compression I'm not sure what else I can do here. Any tuning tricks with timing or fueling that I could utilize if I installed DSMLink or ECMLink on this car?
Last edited: