Im goin to Moroso (drag strip) on fri niight...if anyone here else in south florida is going pm me.......and was just wondering if everyone thinks this is what i should do to setup for it:

1) take out spare tire and any other excess weight
2) run on 1/4 tank of gas
3) Should i run to as empty as i can and then put race gas (100 oct.) in my car? or will it just mess up my engine's timing/and it will be a waste because im not f/i?
4) drop tire pressure to 25-27 psi?
5) heat up stock tires some
6) and launch well....and avoid rev limiter this time lol

7) are these assumptions right?...any other suggestions?

 

yes. everything is correct....and never mention race gas in a stock car again.

 

im not stock i have injen intake and borla exhaust now

 

thats stock enough

 

i think you would have to move into the f/i + higher boost to warrant any consideration of race gas... (or am i wrong?)

 

or have a lot of timing advance. until your playing with the big dawgs you dont need 100 oct.

 

take the brake light fuse out so u can do a nice burnout. Around 10sec long is what i do. got me a 2.0 60

 

The brake light fuse? How does that how Anthony?

 

you do burn out with the stock tires ?

 

I do a burnout on street tires and pull low 1.9s, when I don't im in the 2.0-2.1 range.

 

interesting ,
I was told you're not supposed to do burn outs with the stock tires... gotta try this , thx

 

i only do it for about 3-5 secs of smoke though, not a big fatty

 

There is no sense in lowering the psi of your stock tires. The sidewalls are too stiff with the low pressure only the outside edges of your tires will grip the track. The middles will bow in towards the rim. People with drag slicks lower the pressure because they are designed with wrinkle wall or less stiff sidewalls so they have their give their rather than in the middle of the tread.

 

I thought the opposite is true. I understand your explanation but can you give us more details on how this info was obtained? Also, if other stock tires sidewall isn't as stiff will the mid tire bow in towards the rim as well?

 

when you have proof, like sub 1.9 60' times on street tires at 30+psi, you can say there is no sense in it. until then, let real info spread so people can pull the best times out of their cars and don't post your hear say to confuse.

I run 25psi in mine

 

I agree. Just spin enough to clean the tires. Some tires (ES100) might need to be warmed up a bit more, but most just need to be clean and not cold. I like to do a good burn, but some tires don't stick very good if you over do it.

I agree on pressure too. Drop it some but not too much.

I hit high 1.7s on streets and consistant low 1.8s in cooler weather....and different tires than I currently have on the car.

My car isn't a 350Z, but tire prep is similar regardless of car. Exact psi, obviously, will vary even on the same car with different tires.

 

Dropping the pressure too much with the stock tires will not benefit you, as overdeflection will occur.

It will hurt your acceleration and your braking. One thing I look for in an accident, as a contributing factor, are underinflated tires.

Generally you can tell if they are underinflated because the outside edges of the skid mark will be very pronounced, while the inside will be much lighter, or leave no mark at all.

The same goes for an acceleration scuff mark, except its not as pronounced since the force of the spinning tire tends to make more contact towards the center.

The recommended tire pressure works best, unless you have drag radials, or slicks, which are designed to work better with lower pressure.

I have experimented with this myself, with many different cars, fwd and rwd. I always found the best traction with the stock pressure. I even hit a 1.9 60' with Good Year Eagle RS-A's on my FWD GTP, running 38 lbs of pressure.

2.0's are pretty easy with the Bridgestones on my Z, and with a little more practice I will hit a 1.9.

Burn outs don't help much either, as it may cause the compound to become hard and or blistered from overheating.

A couple of quick spins to clean off the tires, and heat them up, is all you need, a few seconds at best.

Now if you have drag radials, they are meant to be heated up with a burn out, as are slicks.

 

I've hit 1.7s on street tires 8 lbs under recommended pressure. I think I went too low last time because I'd gone to a lower profile same width tire. Conditions were worse, but I still shouldn't be running 2.00s. The sidewalls are undoubtedly stiffer.

Everyone should experiment for themselves. Don't drop to 20 psi like I saw someone suggest in another thread, upper twenties is probably as low as most should go on low profile tires.

I find driving through sand (hardpack or hard dirt) a good way to check for even weight distribution across the width of the tire. If under inflated the tread pattern will be shallower in the center.

 

I have only run 8ths cause thats all we have that in near where I live. I run 35 psi, its high but I dont do a crazy burn out. I did a 9.2, 2.176 60ft rt was .462. Is this any good?