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Registered
Join Date: Sep 2005
Location: Monrovia, CA
Posts: 167
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Changing cams
I have a 2.4T CIS motor that I changed to carbs. Can I simply swap out the CIS cams for E or S cams keeping the CIS pistons?
Kev |
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07-19-2011, 08:31 PM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Nossir,..those other cams have much more valve lift and the intake valves will strike the CIS piston domes.
You need to install E or S pistons to accomodate a cam change like that.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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07-19-2011, 09:37 PM
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Registered
Join Date: Jun 2003
Location: Camarillo, Ca.
Posts: 2,418
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Hi Kev,
About the best you can do is a 20/21 or equivalent from DR racing cams.
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Aaron.  F.S. 1965 Solex engine w carbs/cleanerBurnham Performance https://www.instagram.com/burnhamperformance/ |
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07-21-2011, 07:13 AM
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Try not, Do or Do not
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You can pocket the CIS pistons to allow for the installation of more aggressive cams. This lowers the compression slightly but the increase in performance far exceeds the performance loss from the compression reduction.
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Henry Schmidt SUPERTEC PERFORMANCE Ph: 760-728-3062 Email: supertec1@earthlink.net |
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07-21-2011, 07:26 AM
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Porsche
Retor 911
Scarab
Riley
