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-   -   Stock 79sc 3.0 big port intake port size (http://forums.pelicanparts.com/porsche-911-technical-forum/897066-stock-79sc-3-0-big-port-intake-port-size.html)

jimtweet 01-02-2016 03:20 PM
Stock 79sc 3.0 big port intake port size
 
Can anyone confirm what size intake port I have

1979sc 3.0 big port with 4R on intake runner

c2kid 01-02-2016 03:51 PM
port spec
 
looks like 38mm to me. I tried to measure one with a vernier caliper but I cant find my readers. cheers, geoff

jimtweet 01-02-2016 04:08 PM
Quote:
Originally Posted by c2kid (Post 8941136)
looks like 38mm to me. I tried to measure one with a vernier caliper but I cant find my readers. cheers, geoff
ok I am reading 38mm and 39mm just trying to confirm, but thats close enough

boyt911sc 01-02-2016 05:23 PM
Large and small intake CIS.......
 
Quote:
Originally Posted by jimtweet (Post 8941106)
Can anyone confirm what size intake port I have

1979sc 3.0 big port with 4R on intake runner


Jim,

The '78 - '83 SC's are generally classified into two categories. The large intake runners (38 mm) and small intake runners (34 mm).

Tony


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