Hello everyone.
I drive a CB7/h22a daily, but have recently noticed engine knocking. It reminds me of my very first car and the noise it made before the engine seized up.
So, I'm doing my homework ahead of time. I know an intermediate amount of stuff about NA engines and what they can do and what I can expect from them. I know a fair bit about brakes, suspension and the like, but my knowlege of forced induction setups is beginner at best. I've done some reading, but still have more questions than answers.
I know that the H22A has a high compression ratio and that this complicates turbocharging efforts. I know that the FRM cylinder walls don't play well with the lower compression alu. pistons I'd need to fix the compression ratio. I don't know what the H22's squish zone or whatever, is like. I know that Crower makes a turbo cam for the H, and that, according to Crower tech support, the cam would give a 60-80hp advantage over a stock cam at 10psi. I'm guessing this is because the high overlap on the VTEC lobes would be counterproductive - that the boost would essentially flow *through* the engine, right into the exhaust...? I've heard that the H22 is an OK engine to turbocharge, but really doesn't hold a candle, even after a complete rebuild/buildup, to a stock 4G63 or EJ20 or SR20DET, etc, let alone a built engine like that...
Sorry for the long post so far... I guess my question is, can the H22 be turned into a good turbo'able engine, or is it not worth the money? I just don't want to go NA, spend thousands of dollars just to get 30 more hp and almost no torque... AND, if I'm spending thousands and thousands of dollars for FI, I'm not sure if I'd want to be stuck with a potentially unreliable monster.
Thoughts?
I drive a CB7/h22a daily, but have recently noticed engine knocking. It reminds me of my very first car and the noise it made before the engine seized up.
So, I'm doing my homework ahead of time. I know an intermediate amount of stuff about NA engines and what they can do and what I can expect from them. I know a fair bit about brakes, suspension and the like, but my knowlege of forced induction setups is beginner at best. I've done some reading, but still have more questions than answers.
I know that the H22A has a high compression ratio and that this complicates turbocharging efforts. I know that the FRM cylinder walls don't play well with the lower compression alu. pistons I'd need to fix the compression ratio. I don't know what the H22's squish zone or whatever, is like. I know that Crower makes a turbo cam for the H, and that, according to Crower tech support, the cam would give a 60-80hp advantage over a stock cam at 10psi. I'm guessing this is because the high overlap on the VTEC lobes would be counterproductive - that the boost would essentially flow *through* the engine, right into the exhaust...? I've heard that the H22 is an OK engine to turbocharge, but really doesn't hold a candle, even after a complete rebuild/buildup, to a stock 4G63 or EJ20 or SR20DET, etc, let alone a built engine like that...
Sorry for the long post so far... I guess my question is, can the H22 be turned into a good turbo'able engine, or is it not worth the money? I just don't want to go NA, spend thousands of dollars just to get 30 more hp and almost no torque... AND, if I'm spending thousands and thousands of dollars for FI, I'm not sure if I'd want to be stuck with a potentially unreliable monster.
Thoughts?


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