 Compression changes |
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| -JR- |
 Dec 16 2004, 07:42 PM
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Life goes faster at 150MPH  Group: Members Posts: 276 Joined: 12-May 04 From: Victoria BC Canada Member No.: 2,055  |
Having never worked on a air cooled engine before I'm wondering if it's possible to increase compression of these motors in the same way you do with a conventional watercooled engine.
IE - Head shaving or piston changes? I've got all the bits from a 2L transporter engine that I'm going to put on my 914 EC case motor. However this will mean I will only have 7.3 : 1 compression still. I'd "like" to see it around the 9.0 region but I'm not sure if I can accomplish this without pistons. Has anyone got some feedback? Can I pull this off? Thanks! |
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| Mueller |
Dec 16 2004, 07:55 PM
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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if I figured it out correct, you'd have to move the pistons .08" closer to heads
now if your motor has the head gaskets, those can be removed (and recommened), thickness of those are about .02", you can remove material from the top of the cylinder to increase the compression...of course now you'll have to check the pushrods since they might be too long (they might work as is if just building a "beater" engine) if you can weld, you can close up the combustion chambers to increase the compression.... as far as I know, no easy or cheap method to do this........ |
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Posts in this topic
-JR- Compression changes Dec 16 2004, 07:42 PM
nebreitling i'm thinking you're gonna want pistons.
a... Dec 16 2004, 07:50 PM -JR- Thanks for the tips so far.
I imagine that I CAN ... Dec 16 2004, 08:11 PM Mueller the cylinder heads can be cut, but it's the sa... Dec 16 2004, 08:17 PM -JR- Thanks Mueller. I just thought you might have tho... Dec 17 2004, 03:10 AM Joe Ricard Just measure your deck, Then like me measure abou... Dec 17 2004, 06:47 AM redshift I just put a sponge in there to take up some space... Dec 17 2004, 07:00 AM Jake Raby Don't think about increasing CR with the stock... Dec 17 2004, 09:09 AM -JR- Thanks Jake. I've heard the 2.0L heads were b... Dec 17 2004, 02:46 PM Dave_Darling Yeah, you really want to be careful about flycutti... Dec 17 2004, 06:02 PM -JR- Thanks Dave, I've read Tom Slider's web pa... Dec 17 2004, 07:14 PM
scruz914 ... Dec 17 2004, 07:47 PM |
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