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Pushrod Length tool why less turns?

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Old 08-20-2012, 06:26 AM
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Default Pushrod Length tool why less turns?

So with my comp cam Hi-tech pushrod length checker I found my length required 12 3/4 turns. In the comp instructions, they say to zero out the checker so the lines match up, before you begin to count your turns. If I did it that way my length would be a bit shorter.....and this doesnt seem right. Which is the correct way? You can see the difference in total length below:



12 (.050) = 7.4 + .075 preload = 7.475

12 3/4 (.050) = 7.4375 + .075 preload = 7.512

Thanks in advance
Old 08-20-2012, 11:51 AM
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They should be the same. Difference is likely establishing zero lash.
Old 08-20-2012, 02:40 PM
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i believe they mean to zero out and line the lines up with it all the way in and count the turns out since it looks like you are running trick flow heads going off you measurments i would run a 7.5 pushrod which is common for them heads and will put you at .063 preload
Old 08-20-2012, 04:17 PM
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Oh I see what your sayin. The video Comp posted shows them basically not counting a 3/4 turn so I was confused but I got it now. I just picked up a set of 7.500 from the local shop.




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