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Good Compression Numbers

Old Mar 27, 2009 | 10:34 PM
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Good Compression Numbers

I have searched, this forum is a HUGE wealth of info, and I've read that anywhere between 100-120PSI on both rotors is good. Also, pulses around 30-35PSI is important. My question is, for a 13b twin, what should numbers be around for a non abused, well maintained 1994 with 74,000KM?

Any advice is greatly appreciated.
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Old Mar 28, 2009 | 12:56 AM
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You already have your answer. 100+ psi combined (3 x ~33 psi individual) is generally considered to be great compression. 90+ psi is good, and anything below that will need a rebuild fairly soon.
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Old Mar 29, 2009 | 09:30 PM
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Originally Posted by RotaryRocket88
You already have your answer. 100+ psi combined (3 x ~33 psi individual) is generally considered to be great compression. 90+ psi is good, and anything below that will need a rebuild fairly soon.
Thanks man. The car checked out great! I now have an FD sitting in my garage! Couldn't be happier. I'll be posting some pics tomorrow if you want to check it out.
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Old Mar 31, 2009 | 10:11 AM
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Here are a few pictures right after I got the car back to my house. It has a few scuffs from shipping, but overall I couldn't be happier with the car considering it is 15 years old and has traveled half way around the planet. Let me know what you guys think!









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Old Apr 4, 2009 | 12:52 AM
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Looks nice man..congrats.
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