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Tractor Pulling Discussion Forum

Cam Question for Drew and WTW.

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Zeke Miller

02-10-2007 06:31:55

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Who would you guys recommend for grinding the cam on John Deere A with a power block and heisler head combination?

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Drew

02-11-2007 19:57:05

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Re: Cam Question for Drew and WTW. in reply to Zeke Miller, 02-10-2007 06:31:55

I get my cams Murphy's Motor Service (573-696-3655). You may also want to look into a set of high ratio roller rockers. I saw an increase of 4 hp on a 60 w/ +.125 M&W pistons @ 540PTO speed with the rocker arms.

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DPG

02-12-2007 07:37:03

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Re: Cam Question for Drew and WTW. in reply to Drew, 02-11-2007 19:57:05

Drew,

Was the 4 hp with the improved cam or without?

Thanks!

Doug

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Drew

02-12-2007 10:38:04

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Re: Cam Question for Drew and WTW. in reply to DPG, 02-12-2007 07:37:03

Stock cam and 2.0:1 rockers gained 4hp over baseline.

Reground cam and stock rockers was 5hp over the baseline.

I havent dynoed the reground cam with the 2.0:1 rockers yet. Im waiting to get a power block finished up and installed with another head that has some work done around the eyebrows and the valve guides worked on to allow more lift.

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DPG

02-12-2007 14:24:38

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Re: Cam Question for Drew and WTW. in reply to Drew, 02-12-2007 10:38:04

Thanks Drew,

I'd enjoy hearing what the latest combination produces....I assume that would be after this upcoming pulling season ;>)

Thanks again,

Doug

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Zeke Miller

02-12-2007 04:57:50

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Re: Cam Question for Drew and WTW. in reply to Drew, 02-11-2007 19:57:05

Thanks for the input.

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