Truckstr<<<<

[chevjayfsd]

How do i attach it to a pm????
and The tires are Front:225/70/15
Rear:270/60/15
weight: I think the Swb is 4000? maybe dunno, but yeah yours is close enough..
Try it With 3.73 first then 4.11 or 4.10

[chevjayfsd]

TTT

[Truckstr]

Hey, sorry it's taken me so long to get back to you. This morning was very busy.

I've seen a lot of different weights quoted for our trucks. 4000 is on the upper end of the range of weights that I've "heard". I tend to think that the SWB trucks weigh around 3400-3500 while the LWB trucks weigh 3600-3800 plus the driver. But then again, I've never actually weighed one.

Anyone else out there know for sure?

I'll also need to know the tire diameter, as this is part of the effective gear ratio formula. The width that you gave me is fine. That's a component of the dynamic coefficient of friction.

Everything else is there. I'll give you calculations on both ends of the weight range and times.

I don't know how to attach the DD2000 file, or any others, to a PM. Hopw about if I go out on a limb and let you just e-mail me the file? truckstr@iwon.com (now, watch 'em come out of the proverbial woodwork with requests from people to run their files ).

See ya,
Jeff

[chevjayfsd]

29 inches tal and 8 inches wide
youll have mail in a sec

[Truckstr]

chevjayfsd,

I tried to upload a picture of the Drag 2000 screen, but I'm apparently not too good at it. So...

I did the Drag 2000 testing and used a:

3.23 gear with your setup and... got a 13.661 @ 97.5,
0-60 in 5.183, 0-100 in 13.864

3.54 gear and got a 13.612 @ 96.6, 0-60 in 5.099, 0-100 in 13.815

3.73 gear and got a 14.124 @ 98.6, 0-60 in 5.835, 0-100 in 14.327

4.10 gear and got a 14.066 @ 100.1, 0-60 in 5.675, 0-100 in 14 flat

So, as you can see - for your setup - that the 3.54 gear gives the lowest 0-60 and 1/4 mile e.t.

FYI, I used 3800 lbs. as the weight (with driver), 38% of the weight over the drive wheels, front area of 28 sq. ft. and a drag coeff. of 0.50. These are the best numbers that I have and, I believe, will suffice.

If anyone has any different opinions on the input numbers, then please feel free to say so.

I hope that this helps.

Later,
Jeff



P.S.: Incidently, your combo was doing 5297 RPM at the end of the 1/4 with the 4.10 gear and 4503 RPM w/ the 3.54 gear. All with a 2800 RPM stall convertor.

[chevjayfsd]

ttt

Now all i have to do is find the 3.54 posi setup and i will be on my way....Anyone????

[Truckstr]

Wish I could help ya there, but I can't. Sorry.

Jeff