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-   911 Engine Rebuilding Forum (http://forums.pelicanparts.com/911-engine-rebuilding-forum/)
-   -   36/39 head porting questions (http://forums.pelicanparts.com/911-engine-rebuilding-forum/1054742-36-39-head-porting-questions.html)

Wu.wei 04-01-2020 10:24 AM
Quote:
Originally Posted by rgofast (Post 10804059)
We are running 37 intake 39 exhaust on a short stroke 2.7 with modified S cams and 9.4 to one compression, and it runs great.
Im curious, what was the theory behind this build?

thank you guys for all your responses!

Focker 04-06-2020 09:49 AM
with respect to head porting, on racing motorcycles certain models are modified using epoxy to reshape the ports.

Maybe this is an option instead of having to buy new heads?

stownsen914 04-06-2020 05:32 PM
Quote:
Originally Posted by Focker (Post 10813416)
with respect to head porting, on racing motorcycles certain models are modified using epoxy to reshape the ports.

Maybe this is an option instead of having to buy new heads?

Good point. I know of a Porsche shop that uses a specialized epoxy to repair damaged ceramic inserts on later 911 exhaust ports. Another option to reduce oversized ports is to machine them to accept an insert.


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