I'm just a little curious.

I realize lowering the tire pressures in the rear of the car enables you to maximize the grip of the tire, and give it more of a flat surface.

Though what I can't seem to understand is why people add to their front tires? Is it basically to tilt the car and thus putting more of the weight to the rear of the car to grab more traction or is it something else?

I'm still new to the whole drag racing thing, so again don't go throwing spears or anything.

Thanks,
Menace.

 

I posted this morning, but obviously it's been bumped away. So here's my bump, and hopefully someone can fill me in.

 

I have tried several differnt pressures in the rear and find 22lbs to work the best. At 20 I get wheelhop even with my suspension mods. People keep the front pressure high to reduce drag. Always just leave mine at 35psi. I guess it might make a very minute difference.

 

I suppose that if you lower your tire pressure to some extent MAYBE you might get better traction but the lower the pressure is, the more the tire will cup and you will get less traction as the only part of the tire touching is the outside edges... The converse is true... if you over inflate the fronts, only the center of the tire will be running on the track and that gives you less friction...
all in all, set up your suspension... this stuff aint going to help ya a lot...

 

I did notice an improvement by lowering to 22lbs. My 60 ft time was better and less launch spin. I have full race LCA's and Panhard. Just ordered my Steeda 3rd link and Steeda Frame Rail & Torque Box Brace (3-Point). Can't wait for the brown truck to pull up! Now for the e.t.streets!
As for the fronts, you are right Randy. That why people run the skinnys on the front.

 

youll love the et streets...

 

Hope so. Right now 2nd won't hook at all.

 

when you get your suspension mods on and the et streets youll hook... then the issue is clutches and transmissions....

 

Yea, I see that coming[:@]

oh well, wanna play gotta pay![sm=gears.gif]

 

with the stock pirelli's my 60' went from 2.01 to 1.84 just by lowering the rear air pressure to 23psi. raising the fronts probably doesn't do much but i figure every little bit helps. front air pressure is very critical when dealing with rollout for reaction times though. if you redlight too much lower the fronts 5-10 lbs. or so and try that. the opposite is true if you are late on the tree...just up them 5-10lbs. larger diameter tires will give more rollout and also improve e.t.'s. you may notice some NHRA stock eliminator class cars running 28" tall or taller front tires(skinnies). this is almost always done to improve e.t. since they run on an index and every thousandth of a second counts for them.