You know. Now that you mentioned it. When I went to the track 2 weeks ago. I did notice my tires spun more when I deflated my tires. I thought it was just my imagination or the track suddenly got really slippery but my tires definitely spun more when I deflated my tires. I never really disputed this because everyone keeps telling me that it helps to deflate it. Next time I'll try it again. Thanks!

 

You failed to mention that some of those cars also had other mods done to them at the same time...

 

true, but i think most of them had the normal, somewhat minor mods (i/y/e) but then again i think some of them were stock and/or only had an intake. dont you think those real life numbers mean at least something?

 

true, but i think most of them had the normal, somewhat minor mods (i/y/e) and i think some of them were also stock and/or only had an intake. dont you think those real life numbers mean at least something?

 

To Newman & Quicksilver both of you are making valid statements and provide nice evidence of your cases but I think the only way for anyone to really solve this issue is for one car with mods & one without go to the track. Both will make runs with tires properly inflated and underinflated and then we will see which one is the better times.

You guys know of anyone who has done this and has proof to back up their claim either way?

 

quicksilver did a good job pointing out the weakness in your argument... the cars had other mods. You later said you "think" some of them were stock... which? And how do you account for people getting 'better' at driving their cars? It only makes sense that by the time people start modding they're usually better at driving their car...so of course times drop.

There is something that I haven't read posted here yet... I agree it may help to deflate your tire AS LONG AS you stay in the recommended tire pressure range. People here talk about lowering their pressure to 20lbs on a street tire... that's nuts.

And my "proof"...you can find as many more of these as you like:
http://www.albeedigital.com/supercou...racing102.html
"...street tires ...NEVER deflate them under the recommended pressure"

 

three of the cars in the 5 links i gave you are autos. 1 with just an intake and one with no mods. so, mods arent an issue. and driver ability isnt an issue. as for mods, yes some of the cars i linked had mods, but dont dozens and dozens of other cars on maxima.org? like i said before, the cars i am siting stand out because they have better 60' times in comparison to all other comparable cars on maxima.org. and keep in mind those 5 links arent my only sources, they were just a seclect few i decided to link in this thread.

oh and you might want to check out the whole paragraph you were quoting:
"This is a very touchy area, so pay very close attention! If you are running street tires at the track you should NEVER deflate them under the recommended pressure, or over inflate them above the recommended pressure range printed on the tire. Doing this can cause a tire to wear excessively or cause it to fail. Tire failure can cause you to loose control, and that can result in you damaging your vehicle or yourself! Need I Say More?

On the other hand, adjusting your tire pressures within the appropriate range of the tire can greatly effect the tires ability to grab (hook-up). If you are spinning the tires to much, or even uncontrollably ... lowering the pressure in the tire can help it hook-up better. If you can't get them to spin at all, or very little ... raise the pressure a pound or two. This will free up the tire and make it spin easier."

first off, the reason they say NEVER to deflate your tires is because it may damage the tires and/or cause them to fail. they dont say not to deflate them because it will have a negative effect on traction.

and lookie here, in that very same section on the website: "lowering the pressure in the tire can help it hook-up better"

thanks for giving me the proof i apparently was lacking before.

 

I read the whole article, did you read my whole post? Apparently not because you quoted the article but ignored that I SAID THE SAME THING!

My post you didn't fully read: "I agree it may help to deflate your tire AS LONG AS you stay in the recommended tire pressure range."

The article you didn't fully read: "NEVER deflate (tires) under the recommended pressure".

Yes, it says in the same paragraph underinflated tires may fail but it also says "adjusting your tire pressures within the appropriate range of the tire can greatly effect the tires [/u]ability to grab."

I never said keep the drive wheels at 44lbs, but if the recommended operating range is 34-44, putting 24lbs will not give the best traction. See above... "ability to grab"... see that? Means if you go lower than the recommended pressure IT WON'T GRAB AS WELL.

Read my posts again... I think you're confusing me saying underinflating (which to me means putting less than the recommended pressure) with lowering the pressure (which to me means putting in the lowest amount recommended).

...so I'll say it again... lower the pressure down to the lowest recommended number if you want but you're hurting yourself if you go lower.

 

Just for fun, I've experimented with 24psi to 32psi (street psi) on the track and there was absolutely no change in 60' or 330'. Don't waste your time deflating the tires because radial tires are NOT slicks. No burnouts on street tires either unless you want to make the tires slicker (burnouts on street tires release oils from the rubber). The only pressure you should change is the rear tires. Take them up to the max recommended psi to reduce rolling resistance.


As for the 14.9@93mph in the 6 speed, that's nothing to be worried about. Contrary to what you read on the Org, most 2k2+ 6 speeds do not go low 14s stock. The 93mph trap is slow, but weather, skill, and 60' play a large roll. Mid 14s @ 96-97mph traps are attainable once you learn how to launch, shift, and find cold weather.


Dave

 

i think we are both too nitpicky about what the other is saying. the refutes could be neverending. you may be right in the fact that i was confusing the use of underinflating and lowering tire pressure. not because i didn't realize the difference but i thought the terms were being used interchangably in this thread.

i was under the impression that you were standing strong about the fact that lowering tire pressure most definitely does not help whatsoever. your comment: "I find it very funny how people still hold on to their misconceptions in the face of proof their wrong., but do nothing to try to prove their side." got on my bad side and it seemed to me that you disagreed completely with what i said. i may be wrong but it seems like we both agree that lowering the pressure helps traction but we may have differing opinions on the point where it goes from helpful to harmful (as far as traction is concerned)

my conclusion: i still think that lowering front tire pressures on our cars will help launching.

just how low should the pressure be? maybe not as low as i first thought but i still feel like the two of us cant really be 100% sure about that. ive seen 2.1XX 60's from stock cars with 18-20 PSI but then again there are also 2.1XX 60's from cars with 28-32 PSI. it doesnt seem to be an exact answer.

 

agreed... I wasn't writing clearly on that first page, either... lower it within the tire specs then fudge your way around and see what happens.

 

Go rent two Maximas (identical setups), take them to the track, and run one with 22 PSi, and the other with 32 PSi. Make sure to do as many runs as possible!