Posted by T in NE on May 06, 2013 at 20:56:37 from (75.235.205.188):
In Reply to: Would Be A Cummin posted by geok on May 06, 2013 at 17:48:12:
A P-pumped or VE-pumped 12-valve? The P7100 has a higher HP potential but the timing advance and tunability of the VE44 makes it a better MPG prospect. Turning the governed speed from 2700 to 3200 is pretty simple as well, there is one spring to change in the VE44, and two to change in the P7100.
Then you can get a cam from Colt or Hamilton, get peak torque at a lower RPM, that will help with fuel mileage. A timing spacer from M&H, which allows more timing advance at top end, while not sacrificing low-end torque- makes a bit of difference.
Unless you are planning to really pull some weight behind the camper, chances are you'd end up re-gearing as well, or getting a Gear Vendors unit.
You can make some changes and make the swap work for fuel economy, but you are going to spend a lot of money doing it, especially if you need to buy the motor.
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