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Tractor Pulling Discussion Forum

chads

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bnuhart

05-05-2007 16:11:17




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when setting valves with compression gauge do you set both vales the same or one at a time, if so is one usually tighter than the other.




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ChadS

05-06-2007 05:50:45




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 Re: chads in reply to bnuhart, 05-05-2007 16:11:17  
One at a time, test after each adjustment you make. this can tell you if your overcammed, or under cammed. usually on the IH"s, the intakes are looser than the ehxaust and gains in cyl pressure are seen. Start with all the intakes, then run it till it warms back up, then, go back and do the ehxuast. Chad



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ChadS

05-11-2007 16:36:14




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 Re: chads in reply to ChadS, 05-06-2007 05:50:45  
I got a email from you, I think it was you,,,, tried replying, but got return to sender. I was messing around with lash adjustments one day, on a farmall H, trying to see where I could get peak cyl pressure. If a camshaft grind, is dead on, the peak cyl pressure will be at the book, or spec sheet for that cam, make or model on the lash adjustments. If the adjustment gets tighter, and the pressure goes up, or HP goes up on the dyno, it could mean that you could use a slightly bigger cam. Possibly more lift, duration,,, when the lash is tight, the valve is open longer, and faster than a looser lash setting. If the cyl pressure increases when you loosen the lash up, it can mean alot of things, like too big of cam for the engine combo, compression ratio too low for the larger grind. So other options may be needed to get the cyl pressure higher to produce more power. Milling the head, stroker cranks, etc etc. Then try the adjustment again to see which way the lash goes to get the most out of what you have. But, if its a stroker motor, it can be a different ball game to set up,,, so more info would be needed to know more. Chad

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