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These tires are so close to the same size, 14.5R20 has a loaded radius of 21" Ok, so at 2500 rpm with the OD kit and 14.5R20 mph = 67.35, changing to 395's increases it to 70.56, 3.2 mph more. I think you will notice a little less power on hills, but on the level it will just about not matter.

how tall is a 395? or more to the point for accuracy what is the loaded radius?

thanks guys, I was at least 3 years late getting the OD to market and a lot of people started going to bigger tires. Demand has been a lot less than anticipated, but I didn't do it to make money. Probably have an a/c compressor mount kit in the spring.

exactly! plus there are affordable solutions. trans OD kit is probably less than bigger tires and does not sacrifice performance but even larger tires on stock rims buy some more speed. speed is expensive any way you do it, given that to make the truck safe at a higher speed there are other...

many people confuse high volume pumps. they think it is something special or something very desirable. they could not be further from the truth. you can add a pump that will pump 4 times the volume, but in reality most of the time the oil pressure regulator is just dumping the extra oil back...

original max rpm was 2200 when used in a tractor (white) increasing the rpm is always a case of diminishing returns higher rpm always = lower reliability shorter engine life. on top of that there is no good reason to ever run more than 2500 rpm.

chuck, well i have an old bosch tester and will have to try gasoline etc. where are you in maryland? tom

patrick, i didn't realize you had been so wild, back when. tom

chuck, have you ever seen a MF injector on a test pump? i have a tester and they seem to put out the same mist that other injectors do. just wondering, injectors in cat and cummins spray almost sideways across the piston top while the MF sprays down into the cup. i wonder if that fact alone is...

you are trying to compare gas engines to diesels. true that many formulas will work, but the rods are MUCH heavier and the moment of mass as they swing must be pretty high. now let me say a few things that i think many overlook because they want to go fast or they have no experience or they have...