halerazor

are you guys kidding me, i pulled a v10 ext cab with my 96 2500 and it only had a #6 plate. we pulled in the dirt and both of us just spun, then we took it to the street and i didn't even know he was behind me except for the glare of his brake lights in my rear view. it wont even be close

CTD NUT

Something is wrong if you can't bust the rears loose!! If my Comp is on 5x5, I have no trouble peelin' out on pavement with a hard 2nd gear launch and I don't even have big injectors like you. My 2500 hooks up much better and will launch MUCH harder and clearly takes more power to bust the rears free.....but it does do better burn outs since it has so much more power. With the dually you are cutting the contact pressure in half because you doubled the area. Sure, the dually looks intimidating with the 4 rears but don't be fooled - the weight will be much more important in the tug o' war........it is still anyones pull, IMO.

RustyJC

I understand your point completely. If that's true, then why doesn't a top fueler run skinny tires to "get more traction"?

On pavement, the rubber conforms to the aggregate irregularities in the asphalt, making the tire-to-pavement connection more similar to a rack (road) and pinion (tire) gear arrangement than the classical physics coefficient-of-friction model. In this case, the shear strength of the rubber and the amount of rubber in contact with the asphalt (i.e., more gear teeth) determine traction. That's why race cars use wide tires/slicks - to get MORE rubber in contact with the road.

Rusty

Mcmopar

Be sneaky, make sure your hitch is higher than his, you will pull his rearend up and he will pull yours down-exerting more downforce on your tires.

cincydiesel

I do have the anti spin diff, and he does as well. I have driven his truck and pulled with it several times and you can really feel a difference in power between the two. The Cummins has twice the power...

CTD NUT

You hit it on the head with the coefficient of friction......since it is ultimately the friction that determines traction. Drag slicks run incredibly soft rubber compounds that create the required friction instead of relying on contact pressure. On a dually, the rubber compound isn't anywhere near soft enough to generate the same coefficient of friction the the single wheel truck achieves by higher contact pressure.

RustyJC

Not really. If you re-read my prior post, the conformance of the rubber around the aggregate (gravel) and other irregularities in the asphalt creates a system that behaves more like a geared model than a static or sliding coefficient of friction model. If tire traction were governed by the coefficient of friction, a race car could never pull over 1.0G in acceleration, deceleration or cornering, but they do this routinely. This is only possible because there's a gear-type mechanical "lock" between the tires and road irregularities.
The soft compounds better conform to the irregularities in the pavement and, thus, make a more efficient "geartrain" through which forces are transmitted. As I said above, if it were strictly a coefficient of friction model, 1.0G is the maximum force a tire could transmit, since 1.0G is the static vertical force imposed on the vehicle due to gravity and transmitted to the ground through the tires. In a gear type model, the limiting factor is (1.) the amount of force each gear tooth (tire conformity) can transmit before shearing and (2.) the number of gear teeth involved in the power transmission (bigger, softer tires).

Rusty

CSAGrey1

All fine and well but what it really amounts to is BLAH BLAH BLAH. Just hook the dang thing up and give it a whurl! If you lose then you know you got same more work to do.

blackdiesel

sorry, but my dually just wont do it. And dad has a truck just exactly like mine and his wont do that either. Now if i went out and chaned it down and blocked the front tires and had a dd clutch and bullet proof drive train, if i could get em spinning, i could roast em off of there. but just tryin to go out and lay a nice set of black marks, it aint gunna happen.

RustyJC

Excuse me. I'll not bother anyone else with my windbag posts. Go hitch it up and get it on.

Rusty

CTD NUT

You can continue to bother me. I find your posts interesting and educational.....Although I did ok in physics classes, I have not retained as much information as I would have liked. Let them hitch up and pull their trucks apart.....if that is how they have fun, so be it, but I hope you still have some air left in your windbag for those of us who are interested!

CTD NUT

Well, it don't get much more heavy duty than a D80, 1410 u-joints and a NV5600.....that is a drivetrain with a lot of beef!.....Let 'er rip!!

blackdiesel

lemmie find some chains and some blocks!

blackdiesel

im gunna haveta agree. (with the hitch it up and get it on part) catch it on video!!

blackdiesel

Well did you ever hook em up??