F15 diff swap

[gareth]

It is fitted with 16" wheels, I have thought of fitting 20" if I could find a set. I absolutely love the sound of this engine when burbling through town or down slow country roads, but when you are trying to keep up with jeeps, dodges and gmc on a 6 hour journey on the motorway, it can be just a little tiring.
I always have a mp3 player going in my ears, it's not the noise so much, it just feels like I am pushing it to hard and i cannot relax and enjoy the journey!
Maybe I should sell and buy another dodge wc, Gareth.

[Phil Waterman]

Hi Gareth

The topic of changing the gearing to lessen the noise and lower the revs has come up before but I can seem to find the Thread.

Couple of the points that, stick in my head, from the earlier threads is that it really is more about slowing the engine and drive train down to reduce noise and possibly help gas mileage.

Those who have re-engined or reworked the engines will I think general say with more usable RPMs you don't really improve top speed much particularly with the shorter wheelbase 101" the trucks with a relatively high center of gravity. They really get squirrelly at anything much above 55 MPH. CMP brakes if properly setup seem to be much better than many trucks of the `40s and could handle the speed.

One of the things I've notice with CMPs is that the fans are basically designed for the truck to be running at full load up a 40% grade in 100F+ temperature so that a lot of the noise comes from the fan. So reducing noise from the fan, check out some of the Ford V8 Hot Rod catalogs to see if there is a solution that works.

Can anybody remember the old thread so we can tap into that knowledge as well.

Cheers Phil

[gareth]

I have, in the past, fitted a thermostatically controlled electric fan with much success in the noise department but not so good for cooling, so back to the fan which does a great job.
Like I said I can put up with the fan noise, I would just love another gear, like having overdrive and be able to cruise at about 40-45 mph and enjoy the ride, I think 20" wheels would probably be the ideal soution, now, anybody got a spare set in the UK?, what other vehicle wheels will fit? Morris? Bedford?
Regards, Gareth.

[Richard Coutts-Smith]

5 Speed thread from 2008
http://www.mapleleafup.net/forums/sh...ight=overdrive
Top Speed
http://www.mapleleafup.net/forums/sh...ight=overdrive
And while Gareth has read this before, for the sake of discussion I will include:
http://www.mapleleafup.net/forums/sh...ight=overdrive

Rich

[Mike K]

Tim Vibert installed a White scout car diff in his F15 many years ago....and the 302 Windsor .

Mike

[Keith Webb]

Originally Posted by Mike Kelly

Tim Vibert installed a White scout car diff in his F15 many years ago....and the 302 Windsor .

Mike Cecil did the same with his F15 - sans the Windsor.

[Howard]

I, too, am looking at stretching the legs of the old girl...
I believe that the white scout car centres will fit... but not without a lot of work. From what I have been told, it all sounds a bit hard.
I have obtained a diff out of a jailbar, time will tell if it fits, also if the ratio is more favorable!