Ok guys so my Evo 9 pistons are bad (yes it sucks) so I was thinking since the motor is coming out why not do it right and build it. So I would like to know what compression ratio Pistons do you guys recommend? Some ppl say I can use the stock crankshaft is this true? How did you guys do your set up...

 

what fuel are you planning on running?

 

Need to know your power goals, and what fuel you plan on running. Stock crank is typically fine.

 

I'm runing 93 because bearly drive the car once or twice a month, my goal is 400whp current mods are TBE, intake, FMIC, 1000cc injectors, 255 fuel pump, GSC S1, stock turbo@26psi

 

9.0:1 compression will do you well

 

And you should consider swapping out those S1's for some S2's unless you have no desire to upgrade the valve springs

 

S1's will be fine to make the 400whp he wants.

 

Ok fellas I appreciate the help hopefully goes well

 

400whp goal quickly becomes 500whp. Then 600whp... On this basis I would also go the S2's or similar with springs and retainers, future proof your set up

 

He already has the S1's though. Might as well leave them for now. They'll suit the future 500whp goal just also. 600 will be the goal that needs an upgrade.

 

Yes but there's always the desire for more lol

 

I bought a bare block from Mitsu dealer, Manley forged crank, Manley Turbo Tuff I beam rods, and AMS Custom spec JE pistons. Have your stock crank inspected by a machine shop before deciding to run it. They are known to have small hairline cracks in them. Last time I checked a fully assembled bottom end was $2500 list price from Mitsu. A stock bottom end will hold 400whp.

 

What brand internals did you guys go with your build? Manley, eagle ect. Also when I retune it should I stay at 26psi or can I go higher? What about redline stay at 7k?

 

You're limited on boost due to the fuel you're using. You can only get so much out of pump gas. If it's really good 93 you may be able to get 28 or 30, it's been done before. As for what internals you're going to get different answers from everyone. Some people like aluminum rods, others like steel. Personally I would use a oem 88mm crank, some Manley turbo tuff rods, and some 9.0:1 wiseco pistons. You could even get longer rods and shorter pistons and run a long rod setup which essentially decreases side load on the piston thus will help it live better in the high rpms. people like english racing and buschur have taken their 2.0L's past 10,000rpm. Of course this will be pointless on your car if you're only gonna use the stock turbo.

 

Yea I know 10k is pointless but I at least wanna do 8,000rpm. That setup you mention is the one I have in mind, I wanna do H-beam rods but I just wasn't sure if I should go long rod or short rod, I don't track or launch my car just drive it once in a while so I don't wanna over due my build you know...