Well I think 138 is just a touch optimistic, or if they really tested
it, then they had a very, very, very strong engine. I just ran a few
numbers through CarTest, which is pretty bang on with most mags test
results. I didn't have the CD for the truck, but in order for it to
reach 138MPH it would need a CD of .34, which is better than a Corvette
:-). I'm guessing that it has a CD of around .40 to .45, in which case
120-125 is the top end. I used the frontal area and ground clearance
numbers for an R/T (just happens to be one in my parking garage just
made a quick trip downstairs with my tape measure :-), as well as the hp
and torque specs for the 5.9 with a 3.92 rear end. Speed drops off a
couple of MPH with the 3.55...
Gotta remember that while the trucks may be quick off the line, they are
bricks. Also increases in top end require exponentially more power, so
if 50hp gets you 20mph on the top end, 100hp won't get you 40mph.
Craig
-----Original Message-----
From: Bert.W.Loy-1 [mailto:Bert.W.Loy-1@ou.edu]
Sent: March 28, 1999 11:52 PM
To: dakota-truck@buffnet.net
Subject: Re: DML: Actual Top Speed of an R/T
This doesn't pertain to R/T's completely but it might help out a
little. I read
in a book that the top speed of a reg.cab 318/5-spd would reach a
topspeed of 138mph
if it weren't for that stupid governor! For the six-cylinders, it was
134 or 135??
Can't remember. Anyone try to tackle the govenor problem?
Bert Loy
97' blck Dak/318/5-spd/3.55 posi
MSD wires/coil
Bosch Plat. gapped to .05
Edelbrock Headers
Flowmaster muffler
14x3 K&N
JET chip
Lakewood traction bars
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