nidyanazo

Well.....My tires spin from a dig. The car is pretty damn light, no interior, no a/c emmisions, bumper supports, front sway bar....blah blah blah...I have some mods on the motor, and more coming constantly. I'm at 42psi on my cheap kuhmos....No suspention upgrades, but the car is lowered. So what would the best psi be for acelleration? I go slow around corners

nape

iTrader: (1)

It's going to depend on a lot on what tires you're using. If it's a true street tire, it's going to be hard to hook anyway.

Another thing that's hampering you is that you lowered the car and haven't installed LCA relocation brackets. Without the LCARBs the geometry is off.

If you want the car to hook, get some LCARBs and a pair of M/T Drag radials, and go run some sub 2.0 60' times.

DJP87Z28

How did you come up with 42 PSI for tires on a street driven car??????

vsixtoy

Depends on the tire and the weight of the car.

I run 49psi front (hot) 46.5 psi rear (hot). Have had that pressure on the Goodyear F1 GS-D3 245/50-16 tires on the car for about 1 1/2 years on this set and perfect wear. I have about 20,000 miles on them.

nidyanazo

30psi seems to be good Alot less wheel spin

White91GTA

For daily driving...I keep all my tires at 32psi

When I go to the track...I set the fronts at 50psi and the rears at 18-20psi.

This is on a set of Kumho Ecsta Supra 712s. I run the same tires on the track and the street. Those pressures are set when the tires are cold.

DJP87Z28

To high of a pressure for everyday driving even if checked Hot.

vsixtoy

So why don't you tell me what you would recommend for my car without seeing it or driving it in person- Explain to me WHY its too high of pressure. Read again what I wrote- I swear, some people.

KagA152

iTrader: (5)

i always run 30 in my tires. have a set of bfg drag radials for at the track which are usually between 12 and 15. my car had a set of kuhmo 712s on it when i bought it, good tire for a daily driver, those things would need super glue to hook though

DJP87Z28

Read mfg's recommendations and whats on your car door or go to tirerack for tire pressure numbers . The pressure you are running is meant for competition driving on a TRACK. But I forgot, because you might be one of those nuts who think the street is the track. MERRY XMAS

White91GTA

That is so true. I had a hard time getting it to hook until I started dropping the pressure in the rear tires. IIRC, I got my best 60' with the pressure at 20psi....2.00 60'.

vsixtoy

Every time I see you post on a thread that I have posted on, You have misimformation- You are misleading people with answers due to your lack of knowledge and experience. You happen to think FACT because your door reads that pressure. Aren't you one of EDE's buddies and have a vendetta against me because I have countless times embarassed you in the past?

Let me explain something to you (Let this hopefully be a lesson about everything else you post strongly around here) That MFG rating on the door is for the tires that came on the car 15 years ago. That rating is brand specific for those tires and that delivered weight of the vehicle.

1) These are not the same tires that came on the vehicle
2) Technology has come a LONG WAY in 15 years (18 in my case) Tire design, rubber compound (use of mulitple rubbers on one tire)
Belting, sidewall ribbing, etc etc- Many factors comtribute to a lighter weight tire that can and NEEDS to run higher pressure to maintain the tread flat on the road without distrortion
3) take that outdated tire these cars came with and run it at 49psi on the front and you'll wear the center tread out in about 5,000 miles
4) take my tire on the front and run it at 32psi and you'll wear the outer edges in about 10,000 miles

My tires are not competition tires. My tires fir your information street tires and do not compare to a racing R coumpound tire in traction when heated on a race course- My tires get greasy just like any other street tire would.

Your first clue above was when I stated I have PERFECT wear after 20,000 miles at those PSI setting. Change that with the particular weight of my car and the brand of tires I am running and they WILL wear unevenly- NOW WHY WOULD I DO THAT?

vsixtoy

DIP87, Let me show you a way to check proper edge grip, even tread wear, proper alignment, and proper tire pressure. Its called "chaulk" or "white shoe polish"

Get the tires warm first (drive a few blocks) Then, mark the inside and outside treads of every tire and then drive the car mildly like you would on the street. After a few miles, check the scrub on both inside and outside marks to see if they are even over the edge of the tire. If they are even, but rolling over too far- your pressure is too low. VIsa versa. If the scub is uneven inside and out, camber needs to be added or subtracted first, then recheck after camber is corrected and then set the PSI as stated previously.

DuronClocker

iTrader: (1)

FWIW, I liked having my Supra 712s set at 35psi for street driving. That was more or less for the handling aspect than the straight line aspect. I never tried higher, though probably 38psi or so would've done even better for handling.

Its amazing what tires can do though. Now I have a set of 225/60R16s on my car and it rides so smooth compared to the 50-series summer tires I had. Next season, I'm putting 275/40R17s on thanks to nape Can't wait for that harsh ride and amazing handling

DJP87Z28

I forgot it was the guy thats been banned and now has a new username vsixmisinfo.:hail: :hail: :hail: for all your good info that suits your own personal V6 toy. Now you can rant again.:lala: :lala: :lala:

iggy1991

well why don't you just drop the pressure over several runs at the track and see what the times show then you can set them up whichever way you want instead of being a smartass when someone gives you a suggestion.

nape

iTrader: (1)

No problem, black GTA wheels are too sexy to pass up

91formulaSS

Do not go by what it says on the car door. Go by what it says on the tire that you are using, and by how it feels to you. I run BFG G-Force KDW's 275 40 17 the max pressure rating is 44 psi. I run them around 40 psi hot. The tread wear is perfect after around 15,000 miles. Still plenty of meat on them too, and the ride is not harsh.

nolanr0413

.

DuronClocker

iTrader: (1)

What the hell guys? Before this gets locked, I'd just like to say leave him alone. I listen to his suspension advice before I make any decisions at all. To me, it seems he does a lot of research and trail/error type stuff. If it works for him, it works for him, even if the numbers do seem a bit high.

vsixtoy

Well F*ck you too pr*ck.

I have no idea what the f*ck brought this on by you? A word of advice though- this car is running 15.8 seconds right now with only MINOR modifications to the motor. The new motor that I am building (Not wasting my time with the 2.8) is a 3.5L V6 and will kick the crap out of your TPI 15.25 car .- Think again Cowboy- Oh yes- did I say to F*ck yourself?

nidyanazo

Oh g*d damnit.

vsixtoy

For the record, My brakes are going on on friday. Anyone that wanted to see pictures of them can thank this ******* for kind response to me and the event of him getting me banned- Can't believe the ignorant misinformed *******s around here- I post facts with useful and straight forward info on how to check yoou own setups for optimum levels and asswipes like this have totry and degrade me for my wimpy little V6 all because I'm being helpful

I just dont f*ckin get it anymore.

nidyanazo

24psi is working good for now. Are there any possible bad side effects to running a street radial at too low a pressure?

DuronClocker

iTrader: (1)

Of course. The shoulders of the tire will wear more than the center of the tire. I wouldn't say 24psi would be good for street driving, but again it depends on the tire. I would think, that with street tires, at that pressure, would have very weak handling characteristics (though maybe good straight line).

3rdGenBlackBird

30-35 psi is a little low for modern tires (regular street driving). Dean's pressures are much closer to what most modern tires need. Especially if you drive in the rain.

The crap that's on your door jamb doesn't mean jack unless you car still has the factory tires on it. The easiest correct way to check is what Dean posted. That's the standard way to check proper pressure, not something he made up for his v6....

The guys arguing against him are spitting out stuff that hasn't been correct for years. If you think he's wrong, post why you think your advice is more correct than his.

Scott

3rdGenBlackBird

Like others have said, keep dropping the rear pressure until you get your best launches.

CrazyHawaiian

I run 34psi front and rear on the street on all my cars. I dont really pound it from a stop so I'm not sure about off the line traction at that setting. Thats the pressure that feels the best for cruzing through twisties (not racing, cruzing) and the treadwear seems to be normal, so I stick with it. When I drift I run 38 in the front and between 40 and 55 in the rear, extra in the front to try reduce sidewall flex, extra in the rear to reduce the contact patch (easier to induce oversteer).

Sorry to hear about that stuff Dean. I'm always looking forward to seeing what you're up to with your suspension project.

dimented24x7

iTrader: (2)

In addition to excessive sidewall wear and mushy handling, you can have trouble in the rain. Without enough tire pressure, the center of the tread will cave in under hydrolic pressure when your going through water. This will cause hydroplaning at lower speeds then you would encounter with a tire thats properly inflated. If nothing else, on the street I wouldnt run anything less then whats recommended by gm, unless the tire manufacturer says otherwise.

Joez88Camaro

=

I keep my tires at 35psi

Ragtop89

I've been POLITELY saying that for years.


I put air in my tires.
Sometimes I put a lot in.
Sometimes I let some air out.
Sometimes I leave the tires alone and just drive my car.
Do whatever you need to do for whatever goal you're trying to accomplish.

:lala:

:mansechs: