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Tractor Pulling Discussion Forum

M FARMALL exhaust tuning

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wants to get in

01-10-2005 10:57:21




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Anyone have dyno figures for size and length of collector @different rpms? talking div 1 thru 3 no more than say 370 cubes.As I dont haave ready access to a dyno I would like to get ageneral idea as a start.I know there are umteen varibles but any info is appreciated.Also any Hank Steel Johnson repro vs stock in and ex?How about Dennys tubular ones?




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ChadS

01-16-2005 09:53:36




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 Re: M FARMALL exhaust tuning in reply to wants to get in ballpark, 01-10-2005 10:57:21  
If you are not turning 2500 rpms or more, use the stock manifold. the tube headers dont flow right under 2500rpm, leaves the outside 2 plugs lite brown, and the center 2 spark plugs white. So there is a problem with flow in the denny header. The reproduction LP intakes are really good! Just a bit larger than stock ports, and can handle up to 2500 rpm, with alot of gains in torque. If you can get one, do it! otherwise, stick with stock, lightly port and polish it, and run. Im saying this for engines that are not stroked, under 200 psi of compression and less than 20% over rpm. Just my .01 cents worth. ChadS

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