|
|
|
|
| Author |
|
|
Registered
Join Date: Jul 2001
Location: Thunder Bay, ON
Posts: 4,551
|
What Power Increase from Compression Ratio?
I was looking at replacement pistons and was wondering....
All things being the same, what would be the effect from an increase in the compression ratio for a 2.7L RS Spec engine? Can anyone guestimate the following? 2.7RS w/ 8.5 comp ratio = 210 hp 2.7RS w/ 9.0 comp ratio = ?? 2.7RS w/ 9.5 comp ratio = ?? 2.7RS w/ 10.0 comp ratio = ?? 2.7RS w/ 10.5 comp ratio = ?? 2.7RS w/ 11.0 comp ratio = ?? Regards, Andrew M
__________________
1970 911E - track / weekend car 1970 911S - under restoration 1986 930 Slant Nose - fun car |
||
04-21-2003, 06:21 PM
|
|
|
Registered
Join Date: Feb 2001
Location: Ottawa
Posts: 786
|
equation for engine efficiency is 1-(1/CR)^0.4
for 8.5:1 you get 57.5% for 11:1 you get 61.7% a net gain of 7.3% or 225Hp @ 11:1
__________________
Tony '78 911SC with BITZRACING EFI conversion kit |
||
|
04-21-2003, 07:29 PM
|
|
