Originally Posted by Worf

evo 9 motor compression is 8.8:1
Ralliart compression is 9.5:1

really the diffrence is not that much....and its not as extreme as you put it...

we are not comparing 11:1 compression here...


due to the higher displacemnt of Ralliart the motor will be ok...

its the pistons and rods that are more prone to failure once you hit past 6-7psi boost which puts Ralliart at 245whp/265wtq as dynoed by RRM....
similar numbers to Evo 8 i beleive stock.

once you are changing the pistons and rods(bottom end of the motor) you can build it with lower compression...so it would not be an issue....would be interesting to see R/A build up to handle the boost the Evo 8/9 guys pushing thru the motors to actually see what it dynoes at....

but there is no point to do that to RA>..much better platforms on the market to put a lot of money into.
thow i speculate that it would put RA around 500whp at 20psi...but i could be completely wrong.

I thought i saw a post somewhere with RA from Puerto Rico pushing 700hhp....

Originally Posted by GPTourer

But the turbo was still in the way, blocking the exhaust. You still had timing and fuel maps for boost and it would probably either be running ridiculously rich, or you'd hit fuel cut. It is not the same as being naturally aspirated. A 1G GS or EDM Ralliart would have smoked your car.

Originally Posted by feldguy

...but I doubt anyone would ever do this.