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Registered
Join Date: May 2002
Location: Snoqualmie, WA
Posts: 601
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Another big "boring" question...
Hey there,
Up late, again. I was reading the archives about big bore on a 1.7. If the heads have been flycut for 96mm p's, can you fit smaller (94's) and not leak?  Is my insomnia making me not think straight? Thanks 
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Dave Korijo 73 Olympic Blue 914 1.7L (2L /4 back in progress) 69 Highlander Bug 1776 93 GL EV 2.8L The Van ™ 914club.com Member #914 |
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11-17-2002, 02:29 AM
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Registered
Join Date: Jun 2002
Location: Bristol, England
Posts: 157
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Yes you can, the 96mm barrels are bored out from 94mm two litre so the outside diameter is exactly the same.
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11-17-2002, 03:40 AM
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914 Geek
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Nope, not all are. Some of the 96es are actually (more or less) bored-out 90s, and have a very thin cylinder wall. These are not recommended for longevity, but they are a bolt-on for a 1.7 motor.
You'll have to check the diameter of the head register (the area the cylinder seats to) to see what you've got. I think that the original 90mm cylinders fit in a head register that is 98mm or thereabouts. The larger cylinders may have had a 100mm register. I think. I'm very fuzzy on the exact numbers though, hopefully someone with some experience will speak up and tell us what the actual numbers are. --DD
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Pelican Parts 914 Tech Support A few pics of my car: http://www.pelicanparts.com/gallery/Dave_Darling |
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11-17-2002, 11:26 AM
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74 Porsche 914 2.0 
