The Sr20/Sr22vet thread

[jr_ss]

Originally Posted by brndck

I'm fortunate that WPC is near me in Torrance. I go through a shop called MKS/Bluemoon for that service. Bluemoon has built many engines for formula D cars

I went way overboard, but just having them do bearings is very beneficial and quite cheap.

What did it cost you for bearings and Pistons? I've been on the fence about doing it on my next motor. Did you do rings as well? I need to throw my 9.0:1 VE pistons I got from you up for sale. I've changed my mind and want to go 10:1.

[PoorMans180SX]

Originally Posted by jr_ss

I need to throw my 9.0:1 VE pistons I got from you up for sale. I've changed my mind and want to go 10:1.

IMHO this is a silly decision. 9:1 and 10:1 really aren't that different on a turbo engine, I seriously wouldn't worry about it. Keep the pistons, you'll make the same power. I make the same kind of decisions all the time and always end up kicking myself in the butt because all I did was waste time I could have been driving the car.

[RalliartRsX]

Originally Posted by PoorMans180SX

IMHO this is a silly decision. 9:1 and 10:1 really aren't that different on a turbo engine, I seriously wouldn't worry about it. Keep the pistons, you'll make the same power. I make the same kind of decisions all the time and always end up kicking myself in the butt because all I did was waste time I could have been driving the car.

In all honesty, I somewhat disagree with this. The high compression ALWAYS yields a much better power curve and increases the area under the curve. Outright power is a side benefit, but the biggest benefit is definitely area under the curve and all around better drivability (especially out of boost and boost transition phases). Is it worth the trouble?? 50/50 on this as if he has the means and cost is minimal, why not!

What I find silly however is people still building 8.5:1 and 8:0:1 compression engines. Tuning technology and fuel technology allow us to really approach the knock limit and still be within a safe region. I mean, the damn Honda boys have been running 9.5:1 and above compression engines for YEARS and once the tuning solutions were figured out, I see so many people running 10:1 compression on E85!!

My 9.5:1 SR20 with a T3/T04E 0.64 back end and 50 trimmed wheel had similar throttle response to my 8.5:1 SR20DET with a GT28R on there in addition to area under the curve. The T3 9.5:1 had much better out of boost throttle response and drivability.