I'm very curious how consistent these vehicles are.

I would like to know at 2k rpms your MPH

When I'm on cruise at 2k rpms I'm right at 75mph
factory 3.55LS with factory 265 70 17s.

Engine rotation to Wheel rotation is solid except for the torque convertor. I would expect to see pretty consistent numbers in common vehicles, however who knows?

 

LOCOSCREW,
Same RPM and MPH here too. Same on axle and wheels/tires.
That's two! How's that for consistency?

 

Got 3.73's with LS in my HD special and 4R100 tranny and 275 x 45 x 20 tires. @ 2k I'm running about 69 mph. Just a tad over 2k at 70mph.

 

Same wheel and tire size. Same MPH. 18 MPG - 50%city and 50% hiway


2000 SuperCab Flareside 4X2
XLT w/Sport package
5.4 Auto
Bright Red ‘Radio Flyer’
2/4 Drop
BedRug
Lund Soft Tonneau
White Faced Gauges
Power Rear Slider
Flowmaster Cat Back and Y-pipe

 

I am at about 1800 at 75, Course I just put 285/75/16's on and that changed my ratio, I have a 3.55LS

 

2k on the tach is around 79-80mph in my truck. 235/70/16's and 3:08's in the rear end.

 

With the stock tires 255/70-16 and the 3.55 gears you should be at 2000 exactly....at 70 mph...

Now the SCrew i just bought withe the same driveline and 4.6 you can tell that it is optomistic because the speedo says 73 at 2000...this is wrong as I have been radared a couple of times and I am not going that fast....I am at 70mph....

 

I'm at 2k rpm in overdrive at 70 I have the 3.55 open rear end and the stock 255/70 16 tires.

 

I have a 2001 supercab 4.6, 3.55 LS, with 255-70-16 stock tires and at 2000 rpm im doing 72 mph. I also average 18-20 mpg on the highway.

Larry.

 

I just made a trip fromDetroit MI to Brunswick GA and checked the mileage carrfully. Results:

I-75 south to I-16 east to I-95 south 20.1 MPH (includes a small seven mile backup trying to get into Tenn from Kentucky - took almost 2 hous of crawling and sitting)

I-95 north to I26 west to I-77 north to I-80 west to I-75 north 20.2 MPH.

Best mileage - going downhill on 77 in West Virginia and Ohio 22.3

Worst mileage - going uphill on 77 in the Carolinas virginia and West Virginia 17.75

Not bad for a full sized pickup with the 'big' engine (they can't fool me, it's still a small block).


2000 SuperCab Flareside 4X2
XLT w/Sport package
5.4 Auto
Bright Red 'Radio Flyer'
2/4 Drop
BedRug
Lund Soft Tonneau
White Faced Gauges
Power Rear Slider
Flowmaster Cat Back and Y-pipe

 

Same tires, same wheels, same axle. 4.6 and damn if it aint the same RPMs (go figure)

 

Cool. Consistency! Thats the way it should be!

 

76.5mph at 2000rpm w/ 2001 SCREW XLT 5.4, off road,3.55LS