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-   -   Rpm=mph ???? (http://www.peachparts.com/shopforum/tech-help/204022-rpm%3Dmph.html)

John_B 11-01-2007 02:39 PM
Rpm=mph ????
 
New to the forum.

I recently purchased a 1988 300E from the US and imported it to Canada. Some of the guages where not working so I changed the instrument cluster for one in KM and the speed reading does not seem correct. Can anyone give me the RPM/MPH at 2500/3000/3500 RPMs? I can do the conversion.

Great forum used it before I purchased.

MTUpower 11-01-2007 08:02 PM
Use a hand held GPS to determine speed.

John_B 11-02-2007 01:33 PM
I tried that, my GPS shows approximately +5MPH on my 190E and my wife's Sable wagon

RBYCC 11-02-2007 06:04 PM
Quote:
Originally Posted by John_B (Post 1662832)
New to the forum.

I recently purchased a 1988 300E from the US and imported it to Canada. Some of the guages where not working so I changed the instrument cluster for one in KM and the speed reading does not seem correct. Can anyone give me the RPM/MPH at 2500/3000/3500 RPMs? I can do the conversion.

Great forum used it before I purchased.
300E should have a 3.07 rear end ratio

gear / ratio / mph per 1000rpm
1 / 3.68 /6.3
2 / 2.44 / 9.7
3 / 1.44 /16.2
4 /1.00 / 23.3


2360 RPM in fourth gear would equate to 55MPH

Arthur Dalton 11-02-2007 08:09 PM
<<Can anyone give me the RPM/MPH at 2500>>

If you have stock tires [ 195/65/15] and proper PSI, you should see 60 MPH @2500RPM....+/- 1 MPH

John_B 11-03-2007 08:34 AM
thank yo very much it is appreciated.


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