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Showing results for tags 'high compression'.
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Ok, I have read many forums with many conflicting replies with the following pursuit. A Ej25 block with EJ22 heads for higher compression. The following are my perameters of the build that I hope you guys can help me with. 1). I have limited room for this build. This is not going into subaru, so I have a maximum engine width to be 28 1/2", rocker cover to rocker cover. so I believe I will need phase 1 heads to do this. 2). I would like it to be SOHC. not DOHC not enough room and heavier. 3). It must be NA, so no forced induction of any kind please. 4). I would like it use existing available parts from donor. 5). Which ECU for up to 6500rpm? 6). Which head gaskets and will I need? And will I need to port the combustion chamber to match the cylinders? 7). Any other info that would help? 8). What would the estimated compression come to? What is the best way to start this project and with what phases,1 or 2 and years of these heads and blocks I would like the outcome to be around 185 crank hp or more if possible. And be a more mid range rpm. I don't require a high revving motor.
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Motor: EJ 251 block, stock pistons EJ 25D heads, STI headgaskets Transmission: 5mt 4.11 ends Hey folks, I have a question about RPMs and oil pressure. I have noticed that if I am to drive with RPMs above 3k, say on the highway or if I'm accelerating aggressively often that my oil level will drop quickly. I know that I am leaking from the lower half-moons on each lower-rear corner of the heads, and the rear main is leaking as well. If I am to drive around like a grandmother, and stay under 70 mph (under 3k rpm) on the interstate, that the oil leak is very slow, and I can last a month (two fuel fill-ups) before needing to add any additional oil. Could I be at too high of oil pressure when I'm in the higher RPM ranges? If I'm running a #9 oil pump, would this have any effect? I've yet to check the PCV valve, as it's maybe three years old. I will have this motor out in about a month or two, and was going to re-seal (and mate to 5mt from '05 GT-t wagon) it, but I'd like to try and address the theory now. Are there PCVs that work better for high compression options, if this is a contributor? Any thoughts or suggestions will be appreciated. Greg
