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Join Date: Sep 2007
Location: Fresno, CA
Posts: 158
JE pistons

I had bought these JE pistons for my 2.7L engine years ago but forgot what the compression ratio was. Does anyone have a good guess. I don't see any markings to say except 89m on the inside.

Old 08-30-2017, 11:05 PM
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Originally Posted by hipdoc View Post
I had bought these JE pistons for my 2.7L engine years ago but forgot what the compression ratio was. Does anyone have a good guess. I don't see any markings to say except 89m on the inside.
Here's some photos of the Pistons.
Old 08-30-2017, 11:09 PM
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Measure the compression height and dome height, then call JE and someone may be able to help.
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Steve Weiner
Rennsport Systems
Portland Oregon
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www.rennsportsystems.com
Old 08-31-2017, 08:19 AM
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Steve,
How do you measure the compression height?
Old 08-31-2017, 03:06 PM
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Have a look at JE's custom piston ordering form:

http://www.jepistons.com/PDFs/OrderInfo/custompistons-orderform.pdf

They provide images on how to measure what Steve mentioned.

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-Jayson
1976 911S Signature Edition - 3.2SSt (JE 98mm 9.5:1 pistons, 964 Cams, ARP Rod Bolts, Big Port SC Heads, 3.2 Carrera Manifold, ID725's, B&B Headers, TS HyperGate45 Gen V, TS RacePort, BW S360, AEM Infinity 506, E85)
IG: Signature_911
Old 08-31-2017, 04:26 PM
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