Compression ratios? - RX8Club.com

Sep 18, 2007 | 05:21 PM

ashwins

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From: Raleigh

Compression ratios?

Anybody knows what is the typical compression ratio of an rx-8 rotary engine? How are the rotary engines tested ?

Sep 18, 2007 | 05:41 PM

nycgps

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From: Planet Earth

See the Picture.

and read the Service Manual.

Attached Thumbnails

Sep 19, 2007 | 08:34 AM

champi0n

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From: Portland, ME

I think its 10:1? or something... and they'd be tested the same way as another car, the guage is screwed into a spark plug hole.

Sep 19, 2007 | 09:01 AM

nycgps

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From: Planet Earth

*sigh* ...

Sep 19, 2007 | 10:03 AM

ashwins

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From: Raleigh

Quote:

Originally Posted by champi0n

I think its 10:1? or something... and they'd be tested the same way as another car, the guage is screwed into a spark plug hole.

what is the safe level of variance? I read somewhere else that a compression ratio of 7 meant that the engine is dying?

Sep 19, 2007 | 10:06 AM

tajabaho1

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From: (swartsnegga state)

?? I read somewhere on this forum its 9.4:1?

Sep 19, 2007 | 11:32 AM

Joe_914

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This is just too easy I couldn't pass it up.

the static compression ratio be it 9.4:1 or 10:1 has absolutely no relation to the numbers you get from conducting a compression test with a gauge in the spark plug hole and rolling the motor over with the starter.