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Old 12-07-2017, 06:38 PM   #13
6>8 Plugless........

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Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 15,185
Re: Cummins swap, I know there is a search button but the info is burried in many thr

Originally Posted by randy500 View Post
I’m not going to be able to measure the rear end today but found in pirate 4x that it should be about 69.5 wide which would make it about the same width as the front, might be usable, 4.1gesrs puts 65 mph rpm at 1850 rpm or so, I guess that would be ok, not ideal tho
You'd have to have 35s to get the RPMs down to 1850 at 65mph with 4.10s with a NV4500.

I saw in your thread that you have 33s. The NV4500 has an OD ratio of .73. So with 4.10s and 33s you're looking at 1981rpm@65mph. 2133@70, and 2286@75. Not horrible. Better than with 235s for sure. Haha
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1976 K30 CC SWB Build Thread

Tired of spark plugs? Check this out.

Last edited by Dieselwrencher; 12-07-2017 at 06:49 PM.
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