2.2l Group Buy Feeler
Senior Member
Joined: Nov 2001
Posts: 1,269
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I really doubted about posting here; but then thought "well these threads are for us to learn above anything else" so...
Wouldn't it be a problem to have an even larger stroke than we already have in our 2.0 engines? If with OEM stroke it's not safe to go over 7000rpm because of excess wall load, then at the increased stroke what would be the "safe" rpm limit? 6700? 6500? 6300???????
I don't mean to distort your Group Buy by any means, it's the oposite, I thought maybe others also have this thoughts... then clarifying this would help it.
GL with the GB
Wouldn't it be a problem to have an even larger stroke than we already have in our 2.0 engines? If with OEM stroke it's not safe to go over 7000rpm because of excess wall load, then at the increased stroke what would be the "safe" rpm limit? 6700? 6500? 6300???????
I don't mean to distort your Group Buy by any means, it's the oposite, I thought maybe others also have this thoughts... then clarifying this would help it.
GL with the GB
Thread Starter
Senior Member
Joined: Sep 2004
Posts: 267
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Good question, but easy answer...A safe redline for this kit is actually about 7300 rpm.
This is due to the rotating assemblies much smaller mass and the fact that when you build an engine you blueprint and balance everything to the best tolerances possible, so the engine actually does not have a detrimental redline setback.
Also, even with the redline at only 6500 it would not make much of a difference since the engine will produce so much more torque over a wider power band than the 1.8 or 2.0 models with hotter cams running at 7500-8k.
Finally, the 2.2l kit chugging at 6500 with 15psi should make the same overall hp as a 2.0l running at about 7500 rpm just because of the amount of airflow the engine consumes will be the same.
This is due to the rotating assemblies much smaller mass and the fact that when you build an engine you blueprint and balance everything to the best tolerances possible, so the engine actually does not have a detrimental redline setback.
Also, even with the redline at only 6500 it would not make much of a difference since the engine will produce so much more torque over a wider power band than the 1.8 or 2.0 models with hotter cams running at 7500-8k.
Finally, the 2.2l kit chugging at 6500 with 15psi should make the same overall hp as a 2.0l running at about 7500 rpm just because of the amount of airflow the engine consumes will be the same.
Senior Member
Joined: Oct 2002
Posts: 381
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well if this offer is still in the air, let me know whats up also. i am very interested in this. i have been trying to talk to rpw about this and cams but they have been gaffing me off.
i am kind of weary about using them now so if we do get a locked on group buy, i want some sort of insurance to get my money back in case we get the good old south african screw of no delivery, but from australia.
i am kind of weary about using them now so if we do get a locked on group buy, i want some sort of insurance to get my money back in case we get the good old south african screw of no delivery, but from australia.
