Ford CMP axle ratios?

[Grant Bowker]

Originally Posted by Hanno Spoelstra

Grant, does the AEDB list 9.00-16 tyre diameters so we can compute F15 and F15A engine rpm @ 25 mph?

More tire sizes:
9.00-16, between 34.8 and 35.7 inches
8.25-10 27.8
9.00-13 30.7 to 31.5
9.25-16 33.3 to33.4
14.00-20 47.5 to 47.7

All of the above are from the table for "Regular Pneumatic - Cross Country Tread Design". There are separate tables for "Regular Pneumatic - Highway Tread Design" and "Run Flat - Cross Country Tread Design". Technically, a more accurate road speed to engine speed relationship would be obtained by using "loaded radius" rather than the quoted "free diameter" however the difference between the values will vary with vehicle weight/load, inflation pressure, tire wear etc.

[Hanno Spoelstra]

Thanks Grant for the tyre dimensions.

Tony, I did not realise the power curve of the Ford V8 was that steep!

[Tony Smith]

Originally Posted by Hanno Spoelstra

Tony, I did not realise the power curve of the Ford V8 was that steep!

I would like to see an official GM chart of the 216 power and torque curve should any Chev enthusiasts have one available to compare?

All the online sources I can find mainly deal with the later 216/235/261 on post-war fuel and compression ratios, and how to "Hot-rod" them.

[Phil Waterman]

Hi Tony

I've searched in the past and this is what I found.

http://canadianmilitarypattern.com/2...ifications.htm

Basically as the engine developed they revved higher and produced their power at higher RPM. One of the reasons the 261 is such a nice replacement for the 216.

Will try and find the original source and save the data to post directly.

Cheers Phil