cam size question?
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Junior Member
Joined: Sep 2011
Posts: 71
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From: Ontario, Canada
Car: 87 Iroc
Engine: built 355, 450HP
Transmission: built 700r4
Axle/Gears: 3.27
cam size question?
When telling someone the size of your cam what number do you go by?
lift at cam or lift at valve?
Im a newbe @ rebuilding engines and was reading my cam card.
lift at cam or lift at valve?
Im a newbe @ rebuilding engines and was reading my cam card.
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: cam size question?
Usually people will describe a cam by lift at valve not at lobe, and use .050" duration numbers.
A 306/314 advertised duration 246/252 at .050" duration, .400/.400" lobe with a 1.6 rocker is .640" lift at valve
So when guys ask i say i have a 246/252 .640" cam
A 306/314 advertised duration 246/252 at .050" duration, .400/.400" lobe with a 1.6 rocker is .640" lift at valve
So when guys ask i say i have a 246/252 .640" cam
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