Road & Track used to publish figures for the 2500 ft/min engine speed.
I'm looking at a June, 1961 copy of R&T where they reprinted their road
tests on the TC, TD and TF (1250). Here's what they said:
Rpm @2500 ft/min TC=4230 TD=4230 TF=4230
equivalent MPH TC=65.6 TD=63.0 TF=66.2
R&T Wear Index TC=88.2 TD=101 TF=87.0
Bud Krueger
52TD
Bob Howard wrote:
>Skip,
> Thanks for the exact RPM for 2550 ft/min. 4130 seems a small %
>different from 4000 though. Carl Cedarstrand, in his booklet about gear
>exchanges, that some XPAG engines driven at high RPM over long distances
>experienced premature wear. Is this still a consideration with bearings
>and the oils available today?
>Bob
>
>
>On Wed, 27 Aug 2003 08:56:08 -0700 Skip Kelsey
><kelsey@shadetreemotors.com> writes:
>
>
>>Bob:
>>
>>2550 ft. per min. of piston speed equates to 4130 RPM in the Xpag
>>and Xpeg engine.This should not be exceeded for long periods of time
>>
>>
>if you
>
>
>>want longevity of your engine. You can safely cruise all day at 4000
>>
>>
>RPM
>
>
>>with out problems.>
>>Skip
>>Kelsey................................................................
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/mg-t
|