Stock Cam Size
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Post Fiend
Joined: Feb 2001
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From: Missouri
Stock Cam Size
[font size="1" color="#FF0000"]LAST EDITED ON 17-Feb-01 AT 05:06 PM (EST)[/font][p][font size="1" color="#FF0000"]LAST EDITED ON 17-Feb-01 AT 05:05 PM (EST)[/font]
I have a 1970 ford f-100 with a 1974 stock 390 in it. I was wondering what the lift and duraton of the stock cam is because I am going with a big cam and was wondering how much bigger I will be going. If anybody has this info I would appeciate it. Also if anybody knows the compression ratio and cc of the heads I would like that too.
I have a 1970 ford f-100 with a 1974 stock 390 in it. I was wondering what the lift and duraton of the stock cam is because I am going with a big cam and was wondering how much bigger I will be going. If anybody has this info I would appeciate it. Also if anybody knows the compression ratio and cc of the heads I would like that too.
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Joined: Jan 2000
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Stock Cam Size
These figures are for a '68 390 and should give a good indication for you application.
The stock compression ratio was 8.6:1 with stock heads having combustion chambers ranging from 67.1 to 70.1 cc's ('74 had larger combustion chambers, hence lower compression...I presume). I can't remember the duration of the stock cam, albeit the gross valve lift is .427 int. and .430 exh.
The stock compression ratio was 8.6:1 with stock heads having combustion chambers ranging from 67.1 to 70.1 cc's ('74 had larger combustion chambers, hence lower compression...I presume). I can't remember the duration of the stock cam, albeit the gross valve lift is .427 int. and .430 exh.
