The Ford Barn

4tford · 07-02-2014, 03:54 PM

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

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

Quote:

Originally Posted by 4tford

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

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

Kahuna · 07-02-2014, 07:31 PM

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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.

07-02-2014, 03:54 PM	#1
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,337	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

07-02-2014, 04:02 PM	#2
36fordguy Member Join Date: May 2010 Posts: 74	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

07-02-2014, 06:41 PM	#4
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: 425 potvin cam idle rpm 1000-1100 rpm, Idle good with 3 carbs, blocked power valves, 94's 52 jets. Walt

07-02-2014, 07:31 PM	#5
Kahuna Senior Member Join Date: May 2010 Location: NorCal Posts: 2,617	Re: 425 potvin cam idle rpm Sponsored Links (Register now to hide all advertisements) 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.