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 5.9L rev limit
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C.HARDY
Advanced Member

354 Posts

Posted - 06/04/2013 :  4:04:25 PM  Show Profile  Click to see C.HARDY's MSN Messenger address  Reply with Quote
I am working on a mechanical 5.9L and was curious to what the maximum speed that engine can run at full throttle. I know some of my other 6 cylinders top out around 2700-2900 rpms. There isnt a tag on this engine to go by. Right now it tops out at 2500-2600. Just curious if that is all its supposed to do it just seems a little slow. Thanks

05ICCE
Senior Member

USA
67 Posts

Posted - 06/04/2013 :  6:03:02 PM  Show Profile  Visit 05ICCE's Homepage  Reply with Quote
Our 1993 Thomas / Ford with a 5.9 tops at 2600.

Mr. Scott, "because he drives a COOL BUS"
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C.HARDY
Advanced Member

354 Posts

Posted - 06/06/2013 :  4:34:28 PM  Show Profile  Click to see C.HARDY's MSN Messenger address  Reply with Quote
Well I'm working on a 1995 Ford so I guess thats about the right then. What kind of top end speed do you have on that bus?

"Hardybusman"
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05ICCE
Senior Member

USA
67 Posts

Posted - 06/08/2013 :  1:03:32 PM  Show Profile  Visit 05ICCE's Homepage  Reply with Quote
The govenor was disconected when we purchased it used from a dealer. It was from Loudoun County VA. It tops out at 59-61 depending on the terrain. It must be gear ratio related.

Mr. Scott, "because he drives a COOL BUS"
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C.HARDY
Advanced Member

354 Posts

Posted - 06/11/2013 :  6:04:09 PM  Show Profile  Click to see C.HARDY's MSN Messenger address  Reply with Quote
Ohhh that bus has a 6.6L. I too have a 93 from Loudon County. 6.6L is a good engine but yes these Fords are slow pokes. I think my 95 bus has a 5.18 ratio and just seems like it shoiuld do a little more than 55-57.

"Hardybusman"
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05ICCE
Senior Member

USA
67 Posts

Posted - 06/13/2013 :  4:43:26 PM  Show Profile  Visit 05ICCE's Homepage  Reply with Quote
Doesn't the Ford 6.6 have a one piece common valve cover? My bus has six valve covers.
When i started at the school in 03 they had 3 89 Ford chassis short buses that were not fit to drive though the 6.6 liters all ran great.

quote:
Originally posted by C.HARDY

Ohhh that bus has a 6.6L. I too have a 93 from Loudon County. 6.6L is a good engine but yes these Fords are slow pokes. I think my 95 bus has a 5.18 ratio and just seems like it shoiuld do a little more than 55-57.


Mr. Scott, "because he drives a COOL BUS"

Edited by - 05ICCE on 06/13/2013 4:46:19 PM
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C.HARDY
Advanced Member

354 Posts

Posted - 06/13/2013 :  7:12:33 PM  Show Profile  Click to see C.HARDY's MSN Messenger address  Reply with Quote
hmmm yes you are right about the valve cover and the air compressor is gear driven too. My bus is a 1993 from Loudon County but it has a 6.6L. Maybe they ordered some 5.9Ls later in the year. Thats interesting.....Yes our bus has a little over 230k miles and runs great. I add about 2 quarts of oil between changes and it does pretty good on fuel milage and great for cold starts in the winter.

"Hardybusman"
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