Hey William!
Just to give you a gage, here are my numbers on the '01. I'm running the
3.92 gears with P255/65R16 tires. @2500rpm, I'm at 83mph.
It all comes down to how much highway travel you do. I can cruise all day
@75 and the engine is not working. I'm around 19.5-20 mpg with a tonneau, no
other "mods" except Mobil-1. Third gear @5200 is around 85 mph too. Put it
in 4th @ 3500rpms and it climbs without trying. This thing pulls hard!
Note: not a regular occurrence! Just had to try it once ;^P
Sean
'92 RC Sport 3.9L 5spd - 250,000mi!
'01 CC SLT+ 4.7L 5spd 3.92 LSD Mobil-1!
-----Original Message-----
From: William H. Hiatt III [mailto:william@hiatt.net]
Sent: Monday, April 16, 2001 9:54 PM
To: DML
Subject: DML: RPMS
Well, I'm droppin' the Dakota soon (Full Hotchkis). Currently, I have 4.10
gears, with 275/60R17. I'm thinking about going with 275/55R17's, but am
getting worried about the gears! Currently I'm running these RPM's at MPH:
70MPH - 2410
80MPH - 2755
90MPH - 3099
With the new tires, I'd be running:
70MPH - 2501
80MPH - 2859
90MPH - 3216
Is this ok? How much will this hurt my mileage? How about a 1/4 mile run?
Would it improve it, or hurt it? Any advice is welcome! Thanks for your
help!
william
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