Thread: 8.5:1 DET/8.3:1 GTIR pistons in RR - what CR?

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2010-10-22 00:15:21

jagy

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8.5:1 DET/8.3:1 GTIR pistons in RR - what CR?

As title says. Thanks

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2010-10-22 00:17:29

cortrim1

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Originally Posted by jagy

As title says. Thanks

gtir pistons are 8:5:1.

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Mike
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2010-10-22 00:38:25

mekitch

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Hi
if i put 8.5:1 det pistons into RR motor, what final compression will it get?

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2010-10-22 15:30:30

bbekov

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May be close to 8.8-9.0:1 , because the RR head chamber has less volume.

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2010-10-22 15:50:57

Andreas Miko Online/offline status of Andreas Miko is unknown

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Originally Posted by cortrim1

gtir pistons are 8:5:1.

DET Pistons are all the same part number,

DET pistons in a GTIR is 8.3 to 1

DET pistons in a standard DET is 8.5 to 1

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2010-10-22 19:08:54

jagy

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Thanks, but that was not my question.

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2010-10-22 21:31:44

cortrim1

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yes the answer is above the cr will be slightly higher due to the rr head.

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Mike
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2010-10-22 22:14:55

jagy

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I know. But i think its more like 9.3:1. But Andreas should know better.

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2010-10-22 22:46:15

cortrim1

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Originally Posted by jagy

I know. But i think its more like 9.3:1. But Andreas should know better.

iirc rr pistons are 9:5:1.

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Mike
92 SE-R SR20VE-T 6262 Powered 535whp and 380lbft @22psi
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2010-10-22 22:50:38

#10

jagy

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All EUDM RR are 10:1.

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