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what pushrod length for trex???

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Old Jun 7, 2006 | 03:09 PM
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pushrod length for a trex what is it. doing one for a friend and want to make sure that i hav the correct length, stock long block just a cam. i've searched but no luck, thanks guys
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Old Jun 7, 2006 | 03:48 PM
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any body?
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Old Jun 7, 2006 | 04:13 PM
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Thunder Racing should be able to tell you.
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Old Jun 7, 2006 | 05:26 PM
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Depends on if you have milled heads or not also. I doubt it since you are running the tight clearances with that cam already in stock deck height form. The 7.400, or 7.350 should be fine depending on what the base circle of the cam is and how quiet you want your valvetrain to be.
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Old Jun 7, 2006 | 05:50 PM
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7400 on my trex when i had it
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Old Jun 7, 2006 | 06:56 PM
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What's the base circle? if its around 1.450 then you could use anywhere from 7.400 to 7.450. 7.450 would get you closer to stock lifter preload.
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Old Jun 7, 2006 | 08:42 PM
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Running 7.425 here, I don't think the base cirlce was on my cam card, but I messured mine with a caliper and the base ccirle was ~.030 smaller (if I remember right) than my stock 02 cam.
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Old Jun 7, 2006 | 11:20 PM
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When I was researching the TREX, Thunder Racing said they recommend a stock length pushrod, which is 7.400.
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Old Jun 7, 2006 | 11:29 PM
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Originally Posted by GuitsBoy
What's the base circle? if its around 1.450 then you could use anywhere from 7.400 to 7.450. 7.450 would get you closer to stock lifter preload.
Like I said that is the information that you need.
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Old Jun 8, 2006 | 12:06 AM
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7.400 as per TR advice/recomendation.heads milled 3-5 thousandth.cleaned up job.good luck.
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Old Jun 8, 2006 | 12:07 AM
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exellent thanks much for the help guys!
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Old Jun 8, 2006 | 12:14 AM
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Thunder recommends 7.400 but a lot of guys get the "sewing machine" tick with that size. I am going to go with 7.425 to be on the safe side.
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