nick14003

Throwing out buying new tires...

Whats the best PSI for a drag race on stock runflats?

Do you think it will make any difference 20psi vs 35 psi on runflats?


I'm thinking high psi up front 35-38 and low psi in rear 25-28, but these are just numbers i'm throwing out. I don't know if it will make any difference at all especially on runflats, wanting to hear what you all think


P.S. I slip ALOT, getting rid of that would help greatly and if its as simple as PSI that would be amazing. Also I avoid the waterbox as I've been told by experts that street tires slip more if you burn out due to oils etc coming out.

lebvette

It will not make much difference. Runflats are just too hard.

Dcasole

I was looking for the same answer last summer as I too can blaze the tires at will which are New Michelin Pilot Super Sports ( with the traction control on )

I am trying to figure out how to best launch the car and I figured more than enough guys here on the forum have already figured it out

I was right
Most guys that drag race on run flats gave me the exact info that you posted above as far as air pressure , the guys with A6's stated that they put the car in competition mode and then brake torque the car at around 1200 rpm ... I am not so sure about that one as I think I might just blaze the tires off of my car if I do this but we will see

Been a long time since I have been to the track , cant wait ... but I am sure the biggest hold back is not going to be the car, its going to be the driver lol lol

Dave

irok

your just beating your head against the wall running runflats or non runflats.I ran 1.76 60ft once only on stock runflats.car goes 1.45 60ft on drag radial

LMB-Z

Just start in 3rd gear.

Dcasole

I just want to see what the car will do in street trim ... if its that bad I will get drag radials but I think I will need a " DRIVER MOD" to get a 1.45 60 ft time .... that's great

Dave

HOXXOH

I ran 30 psi all around when bone stock on OEM RF's.
Best 60' w/o burnout and idle punch - 2.18
Best 60' w/short burnout and idle punch - 2.03
Best 60' w/short burnout and 1200 stall launch - 1.99

Then came the mods (still stock converter) and the best 60' on RF's was 1.90

Just for reference, the best 60' on street tires (any brand and any mods) - 1.74.

Best 60' with DR's - 1.48

The driver mod will always produce better times on street tires than a psi change. With more practice, I'm sure the 1.74 on street tires could be beaten.

The key is to roll into the throttle from a higher than idle launch without spinning. A lot easier said than done.

ben dover

Absolutely.

lebvette

I would not drag race in 'comp mode'. It gives you less nannies to keep you out of the rails. Hit the button once and take off the traction control, but keeps all the nannies on to help keep you on the track.
Competition Mode is more for the road racer.

nick14003

turning off traction control also disables active handling

competition mode turns off traction control and reduced active handling effects,

Turning off traction control/active handling means you are on your own and is the most likely option to end you in a wall

HOXXOH

Not sure I agree, since there have been several occasions when I've turned off TC to do a burnout at the track and active handling kicked in, including that the DIC warning message appeared.

The only time I ever came remotely close to losing control, was when the preceding car broke a radiator hose shortly after the 1000' mark and I hit water well over 110 mph. I instinctively attempted to correct a slide, but active handling beat me to it and then over-corrected before straightening again.

ProfessorDeath

Launch/roll off in 2nd.

INTRCUL

A lot had to do with keeping water off the tires and learning how fast to release the clutch and how quick to roll into the gas. Stock run flats can get a C6Z06 or ZR1 well into the 1.7's range so it's doable, but less consistent than just getting drag radials.