Compression

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Aug 26, 2002 | 05:06 PM

AllRoy

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Compression

What is the normal compression on a stock FD engine?

Aug 26, 2002 | 05:10 PM

jspecracer7

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From: Where there's only two seasons, hot and wet! I love Okinawa

I've heard 9 kg/cm2 is a good, healthy engine...but I could be wrong

Aug 26, 2002 | 05:15 PM

Dont_Be_A_Rikki

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from 6.5 to 8.0 is good to me. I have yet to see a reman other than mine to have a high compression.

Aug 26, 2002 | 05:23 PM

AllRoy

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What was your compression?

Aug 26, 2002 | 10:16 PM

AllRoy

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is it 9 or 6.5 to 8?

Aug 26, 2002 | 10:21 PM

jspecracer7

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From: Where there's only two seasons, hot and wet! I love Okinawa

Quote:

Originally posted by AllRoy
is it 9 or 6.5 to 8?

6.5 to 9 is what you want.

Aug 26, 2002 | 10:38 PM

AllRoy

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Thanks!

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Aug 27, 2002 | 01:42 AM

Nathan Kwok

Rotary Enthusiast

Joined: Feb 2001

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From: Huntington Beach, CA, USA

8.5 kg/cm^2 is the factory new spec, not 9. Why EVERYONE thinks its 9 i have no idea. 9.0:1 c/r maybe? So, a brand new engine should have 8.5 kg/cm^2 all around. If you've read results higher than that, its probably because it was tested cold, which boosts results by almost exactly 1.0kg/cm^2 all around, in the example I saw. The minimum is 6, so, basically 6-8.5 is the valid range. This is at 0 ft, 250rpm, HOT engine.

May 7, 2003 | 07:18 PM

DaedelGT

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Joined: Nov 2002

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From: LSU - Baton Rouge, Louisiana

Sorry to revive this ancient thread

I'm looking to buy an FD with 50,000 original miles and he just got his compression check done this afternoon.

Quote:

Here are the results of the test...

9.5 9.6 9.3 244RPM
8.7 9.0 9.0 243RPM

They said that was pretty good. Im not really sure what it should be???

Let me know if you're still interested.

Thanks,
Paul

Judging from the above posts this seems pretty good. He wants 12k for it. Good boost pattern (10-8-10) and pretty good interior. Fading paint on the bumper and rear view mirrors. Clunk from the hatch. Completely stock other than the boost guage.

Thanks for any opinions