Thread: what compression?

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2010-09-23 20:07:37

#21

Raceworx

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how can SR20VE 20v pistons be 11:1 in a 2.0 and the 1.6.. SR16VE pistons are 11:1 in the 1.6 and 13:1 in the 2.0..

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2010-09-23 20:09:06

#22

Kyle

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They have the same chamber volume. The piston crown is what is different.

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2010-09-23 20:16:38

#23

Raceworx

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yeah but theres 400cc difference so you not compressing as much air.. so compression drops in the 1.6

SR20VE 20v pistons would be like 9:1 in an SR16VE

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2010-09-23 20:19:28

#24

Kyle

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Are you stroking it or not? I am getting more confused now, I'll leave this one alone.

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2010-09-23 21:51:42

#25

gtswrx

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Originally Posted by Viprdude

Are you stroking it or not? I am getting more confused now, I'll leave this one alone.

The first post is clear, he is talking about a 20VE, 2.0lts, 1998cc, SR16VE "stroked" to SR20VE with SR20VE crank..........

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2010-09-25 13:19:07

#26

niZmo

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Originally Posted by Viprdude

OEM SR20VE pistons are 10.4:1 compression ratio.

20V pistons are 11:1 compression ratio.

Where is the proof? I have always heard 10.3:1. A website also showed me 11:1

peace

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2010-09-25 13:32:21

#27

D-Unit121

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Originally Posted by niZmo

Where is the proof? I have always heard 10.3:1. A website also showed me 11:1

peace

x2. im just getting in to the vvl world and i allrdy wana boost it but info like this would help alot

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2010-09-25 19:22:06

#28

BlueRB240

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.....................

Originally Posted by Raceworx

what compression are these in a 20VE :-

Piston, 2.0 VVL (20V), This is the OEM piston from the SR20VVL 20V. Comes with pin and clips.

are they 11:1?

Raceworxs what kind of gas do you have where you live? I have SR16 pistons in my SR20VE. If you live some place where they have 92 octane pump gas you can prob get away with it better. We only have 91 out here so I had to do some major ignition map tuning to get it run without pinging.

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2010-09-25 21:28:36

#29

Raceworx

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i can get 95 97 or 99RON uk fuel.. dont know how that compairs to us fuel specs..

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2010-09-25 21:42:53

#30

BlueRB240

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Originally Posted by Raceworx

i can get 95 97 or 99RON uk fuel.. dont know how that compairs to us fuel specs..

your 95 is about my 91 so 97 would be a little better to run but 99 should make it very nice to drive and you can keep more timing in the low end vs on 95ron. This also makes the amount you pay per tank go up a lil lol.

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