rpms vs mph

[unclemarc]

Greetings everyone from the frying pan they call Arizona,I finally installed the isspro tack that I purchased about 6 weeks ago. What I was wondering is what would be a normal reading at 70 mph,my tach reads 1,950 to just under 2,000 rpms,also just wanted also to see if the trans is in good shape or if it's slipping more than it should. thanks for any replies unclemarc

 

[Rebel Ram]

That sounds about right.

 

[cerberusiam]

Depending on tire size, thats in the ball park with mine.

 

[JRussell3176]

Yep, right about the same as mine.

 

[jimnance]

Exactly the same as my RPM at that speed.

 

[unclemarc]

rpm vs mph

Thats good to know that I'm right in there with other rigs. I'm running 265/75-16 size tires,I feel good knowing my transmission is still good My next step is a isspro pyrometer any thoughts on the best place to buy? unclemarc.

 

[MBergman]

Unclemarc,

I got mine at www.dieselmanor.com. Give them a call and tell them you are a tdr member. Very nice company to deal with.

Marc

 

[BushWakr - RIP]

The Cummins engine really likes that rpm range ..... I guess it's the design specs or something technical like that... . independant testing has also shown best milage is in/at/around the 1700 - 1800 RPM range... ... ... . go figure...



pb. .

 

[unclemarc]

rpm vs mph

Thanks for the info guys,Thanks for the link on the pyro MBergman. I'm embarrased to say I went directly to isspro for my tach and needless to say I paid dearly for it :{ Oh well live and learn,from now on I'm listening to the braintrust on here unclemarc