The Ford Barn - 425 potvin cam idle rpm

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4tford

07-02-2014 03:54 PM

425 potvin cam idle rpm

425 potvin cam in the 304 cu in. What should the idle rpm be set at. Street engine. Thanks Bill

36fordguy

07-02-2014 04:02 PM

Re: 425 potvin cam idle rpm

I have a Howard M14 that is a radical cam and it idles at 950 to 1000 rpm. I had a fuel dragster with a Potvin 425 , on the can of nitro it would idle at about 1200

Pete	07-02-2014 05:06 PM

Re: 425 potvin cam idle rpm

Quote:

Originally Posted by 4tford (Post 903805)

425 potvin cam in the 304 cu in. What should the idle rpm be set at. Street engine. Thanks Bill

Wherever you prefer it.
It will idle at 600 but will have better off idle throttle response from
900 to 1200.

Walt Dupont--Me.

07-02-2014 06:41 PM

Re: 425 potvin cam idle rpm

1000-1100 rpm, Idle good with 3 carbs, blocked power valves, 94's 52 jets. Walt

Kahuna

07-02-2014 07:31 PM

Re: 425 potvin cam idle rpm

Before I had a lifter fail and destroy Pete's nice cam, I found the idle speed to be ideal @ 800 RPM with the timing advanced to 12 degrees initial and 24 all in. The throttle response was fantastic and I expect the new cam, after I send another core to Pete, to be the same.

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