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-   -   993 HE's Too Big for 3.0 MFI? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/336560-993-hes-too-big-3-0-mfi.html)

1972_911T 03-19-2007 12:28 PM
993 HE's Too Big for 3.0 MFI?
 
Im in the process of building a 3.0 MFI engine using large port SC heads. I have a set of 993 HE's with flipped flange for use on the early heads. Are these too large for use on a 3.0 MFI engine? I have heard that these engine benefit from some back pressure.

Regards Steve

jluetjen 03-19-2007 01:45 PM
What sort of cams will you be running?

Porschekid962 03-19-2007 09:53 PM
FWIW the ID. of the 993 heat exchangers is identical to the SC RS and RSR 3.0 header which happens to be 42mm or 1 5/8th inches. If you have smoothed your heads out and are running some hot cams it should work out pretty well.


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