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914World.com _ 914World Garage _ 94mm vs 96mm

Posted by: seanery Jun 23 2004, 06:07 PM

The engine I'm taking apart has 94mm euro pistons in it. Would there be any difference using 96mm flat tops? I mean would there be any seat of the pants feeling?

Posted by: McMark Jun 23 2004, 06:27 PM

Displacement versus compression. Good question. If you have 96 flat tops, you can build compression in the head and have the best of both worlds.

Posted by: Jake Raby Jun 23 2004, 06:40 PM

Yep, about a 10% power change , especially if the cam is not stock..

Posted by: Bleyseng Jun 23 2004, 06:47 PM

Soo lets see, if a stock 2.0l dynos at 80 rear wheel hp then you would get 88 rear wheel hp. Damn thats pretty good.
The best my 2.1 djet motor dyno'd was 95hp at the rear wheels.

Geoff

Posted by: seanery Jun 23 2004, 07:09 PM

Jake,
the cam is a webcam 494, with dual idf 40s.

Posted by: Jake Raby Jun 23 2004, 07:21 PM

VERY Nice cam... Not great for HP off the shelf but wow is it torquey and smooth.

Run that sucker at 9:1 with those 96s and its good for 115HP, with stock valved heads..

Posted by: ruddyboys Jun 24 2004, 11:27 AM

I know the PO replaced the cam, is there a way to know what cam I have without splitting the case?

Posted by: Jake Raby Jun 24 2004, 12:18 PM

Remove the oil pump and see whats stamped on the cam drive flange..