390 RPM's
May 4, 2004 | 08:35 PM
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From: St. Libory
390 RPM's
Does anyone know what kind of RPM's a 390 with a C6 and a D60 3.54 on 31x10.5 tires would be runnin at about 65? (It's in a '69 F-250 if that makes any difference) I know there is some long formula because i read it once but I was too young to care and forgot it
Thanks in advance!!!
Last edited by jseim44; May 4, 2004 at 09:10 PM .
May 4, 2004 | 09:12 PM
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From: Brea CA
May 20, 2004 | 11:37 AM
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From: SANDIEGO
www.cvsr.net and go into the games and go to gear heads. this will give you the exact speed and rpm. but you need you tranny gear ratios
May 20, 2004 | 01:18 PM
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From: Cheney, Wa
3rd gear in a c6 is 1.00:1
May 20, 2004 | 03:28 PM
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From: Smith Mountain Lake, VA
I come up with about 2,450 RPM @65 MPH...
May 20, 2004 | 04:36 PM
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From: Iowa
i come up with 3680 rpm's at 65 mph with 4.11's, seems high.
May 20, 2004 | 04:42 PM
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From: Smith Mountain Lake, VA
Fordman but he's running 3.54s
May 20, 2004 | 04:46 PM
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From: Smith Mountain Lake, VA
4.11s would be about 2,850 @ 65 MPH
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May 20, 2004 | 04:47 PM
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From: Smith Mountain Lake, VA
Have to make another reply... Cant have that 666 up there!!
May 20, 2004 | 05:31 PM
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From: Iowa
Quote:
Originally Posted by RapidRuss
Fordman but he's running 3.54s
sorry about that russ i was running my combo, when i typed in 25" tires, 4.11 gears at 65 mph it said 3860rpms.
why didnt you want to see 666 for your # of posts
May 20, 2004 | 05:47 PM
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From: I live in Calif. near S.F
I"ve got a 75 F250 2x4 3/4 ton CS, running a 390 , c6, D60 , my tires are 32"x16, at 65 mph, i"m around 3300 RPMs.
May 20, 2004 | 05:50 PM
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From: Brea CA
There used to be a time when the post counter only incremented once for all your replies in the same thread, it was a lot harder to jack them up back then.
May 20, 2004 | 06:07 PM
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From: iowa
Quote:
Originally Posted by BB
There used to be a time when the post counter only incremented once for all your replies in the same thread, it was a lot harder to jack them up back then.
Hey that wasn't too long ago!
May 20, 2004 | 06:32 PM
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From: Smith Mountain Lake, VA
Oh..I wasnt trying to get more replies..just that one that had the 3 - 6s on it!
The mark of the devil...... Sorry Guys?
May 20, 2004 | 07:56 PM
Joined: Feb 2000
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From: Brea CA
I understood what you were doing Russ and completely agree… don’t mess the devil!