Thread: 3.8rs
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Bill Verburg Bill Verburg is offline
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Join Date: Dec 2000
Posts: 23,131
Start w/ the crankcase, spiggot holes need to be bored from stock 107mm to 109mm and a groove for the profile rings needs to be machined into them. 110.72x3.53mm profile ring seals will be installed there.

p/c are 993 103 915 42(43,45,46,47,48) depending on weight class

conrods are stock 993 there are h/d versions available

the heads have larger ports, you neeed too port a stock 993 head

intake valves are larger, Na cooled on both I/O, 51.5/43.5 mm note the exhaust valve is the same size as a stock v-ram but has Na cooled stems


some other relatively minor harware and accessory things are also different but not that important.

the lower v-ram intake tract is larger as are the injection blocks
Bill Verburg
'76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone)
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Old 08-23-2005, 06:33 AM
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