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Registered User
Join Date: May 2015
Posts: 2
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2.2 to 2.7 intake/exhaust port size question
Have a 2.2e engine. I recently rebuilt and have 2.7l cam, rods, cylinders and JE 9.5:1 Pistons. I currently have 2.2 heads (stock is 32/32 ports, 46/40 valves) that have the intake port bored out to 35mm and had the exhaust ports cleaned up however still 32mm.
Essentially my engine is now a 2.7. I have the same intake port size and same valve sizes however smaller exhaust. Please give me your opinions on this setup. Also, I am not very interested in getting a new set of heads cause my heads are already rebuilt. Getting a rebuilt set of 2.7 heads would prob be 2k+. Opinions? Last edited by Chily89; 05-13-2015 at 05:54 PM.. |
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05-13-2015, 05:13 PM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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Port the exhaust out to 35 and you are good.
Still E cams? MFI? Maybe some matching of the manifods to the heads is in order.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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05-14-2015, 12:02 PM
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Registered
Join Date: Jul 2012
Location: Simi Valley, Ca.
Posts: 265
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2.2 engines have a 66mm crankshaft stroke. If you do not have the later 2.4 crankshaft (70.4mm) you will not have 2.7L displacement. 90mm bore X 66mm stroke = 2.5L displacement. If you do have the 70.4mm crank, never mind. If you don't, time to re-calculate the CR.
Bob B Last edited by NICE 69 S; 05-15-2015 at 02:07 PM.. |
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05-15-2015, 11:24 AM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,696
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Quote:
Agreed. The factory ran 35/35 and 36/35 (intake/exhaust port sizes) on the 911S and RS engines, so would probably work well. If your heads are already built and it would be a pain to port them at this point, just run it as is ... |
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05-23-2015, 04:10 AM
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My Garage
1971 Porsche 911
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