n/a freak?

[towtruckdave]

With the torque an IDI churns out, 10 second zero to 60mph times are just a matter of having a light enough truck.

That orange 6.9 scout probably will do it.

On top of truck weight being a big factor, another thing to consider is that no two cylinders are exactly alike. Some hit harder than others. With 8 cylinders worth of variables, it is no wonder some engines run better or worse than others.

A good machine shop can build an engine that hits extra hard and evenly on all 8 by squaring up and evening out the critical internal geometries. ICANFIXALL was just posting about that last night in the smokey black truck thread.

Some factory engines just come out better than others.

 

[towtruckdave]

Deeproots has a good running truck:

http://s68.photobucket.com/albums/i6/DeepRootsNursery/?action=view&current=MVI_0409.mp4

 

[rjjp]

When mine was stock it would do 0-60 in just under 11.

Im sure a 3:55 gear truck w stock tires and an OD is capable of 100+ MPH

A 4.10 equipped truck with overdrive is capable of breaking 100 with 32" tires,
E4OD=3100 RPM (assuming no slip)
ZF5=3350 RPM

ON EDIT:
Factory tire size for my 2wd F250 is 31.7" according to the sticker on the drivers side door jamb (235/85R16=31.7x9.3/16).

 

[91dirtydiesel]

http://www.youtube.com/watch?v=LQf7p0LiOiI

 

[Ididriver]

http://www.youtube.com/watch?v=LQf7p0LiOiI

pretty fast for such a big truck.
last time i clocked my 0-60 it was right at 12.5 seconds. but thats turbo and maxed pump not NA. going to do another run when i get my intercooler back on.

 

[DeepRoots]

Deeproots has a good running truck:

http://s68.photobucket.com/albums/i6/DeepRootsNursery/?action=view&current=MVI_0409.mp4

Technically "had" a good running truck... it's sold now.
I think that video was good for what 11-12 seconds or something. The speedo was correct as per gps.

The biggest factor with these trucks, is there is at least a 5000lb variance in different models, setups, etc.
For example at the time of that video I had my truck stripped down and weighted right at 6,000lbs. That is about as light as you can get an extended cab truck. Not to mention I only weight 150lbs

Of course now I have a 3,800lb F100 with a 390 which does 0-60 a wee bit faster It is getting lighter all the time as I pull out useless stuff.

Drew

 

[Danoflapper]

I've been told mine's pretty speedy for what it is.

http://www.youtube.com/watch?v=47-wDinKhng

 

[Diesel_brad]

Deeproots has a good running truck:

http://s68.photobucket.com/albums/i6/DeepRootsNursery/?action=view&current=MVI_0409.mp4

That was turboed,moose pumped, 2wd, auto ,and, stock tires.

Big difference between that and the OP truck.

 

[blown84]

my truck has only 97,*** original miles. the PO was REALLY good about keepin things in good shape, mechanically, as he used it to pull his camper. i have advanced the timin to bout where i think it should be (maybe im one of those lucky ones who hits 8.5 degrees advance by sheer luck?), and i have not turned it up at all. it has a 3" strait pipe for exhaust, and i roll on 315/75/R16s (35x12.5s) with 3.54 gears, and shift my own gears via the T(urd)19. i waited until that last instant before the IP hits the governor to shift. when i have more time, one of these days, ill take it out and shoot a vid usin the GPS to verify.

also, because it was mentioned early, accordin to my GPS, the top speed for a 3300 governed/T19/3.54 truck on 35" round stock is 89 mph, downhill. bout 87 on the level.

 

[towtruckdave]

That was turboed,moose pumped, 2wd, auto ,and, stock tires.

Big difference between that and the OP truck.

Yes, I hear you Brad, they are different in many ways that make a pretty big difference in 0-60.

My truck is more like the OP's and it moves out ok but nowhere near 0-60 in ten.

 

[Diesel_brad]

when i have more time, one of these days, ill take it out and shoot a vid usin the GPS to verify.

also, because it was mentioned early, accordin to my GPS, the top speed for a 3300 governed/T19/3.54 truck on 35" round stock is 89 mph, downhill. bout 87 on the level.

GPS is a waste of time, it takes to long to correctly read the speed. There is at least a 2 second delay.

Go to a drag strip. That is the ONLY way to get accurate results.

Even those handheld 1/4 miles gizmose leave room for error

 

[snaponprofile]

Anyone know the top speed of a ZF with 4:10's?

 

[Sw1tchfoot]

When you are the one driving, the seconds go by faster than it seems.

 

[blown84]

Anyone know the top speed of a ZF with 4:10's?

Bout 110-115 mph.

 

[Diesel_brad]

Anyone know the top speed of a ZF with 4:10's?

Copied from site on the net
First we need to figure out your tire diameter in inches (TD abbreviated from now on) using the following formula:

285/75/16 (Tire Diameter_
TD = 31.8

Now we're gonna use the next formula to get a numeric value we'll need for the last equation. Formula is:

GR = Final Drive Ratio * Gear Ratio

For Gear Ratio plug in which gear you want to calculate, 1st, 2nd, 3rd, etc. gear ratio...

For 5th gear:

GR = 4.10 * 0.77
GR = 3.157

Now we're ready for the formula to calculate top speed in your chosen gear. Formula is:

MPH = (RPM * TD (Tire Diameter from above)) / (GR * 336)



MPH = (3300 * 31.8) / (3.157 * 336)

MPH = 104940 / 1060.752

MPH = 98.93