Biggraz

Cars setup currently on a 17" setup with a M&H race master, made a little under 800 to the wheel on a mustang dyno. From 40 at 20psi (hot) I cannot get any traction with brand new tires. Don't know what to do, didn't think I would need a 15" setup with this power level? What are you guys doing?

Dude_man

What mph do you actually start hooking? I had a hard time hooking with 17s unless it was concrete and at least a 60 roll(when brake boosting).

Biggraz

Like 80-90 maybe, this particular spot I usually run is concrete.

Dude_man

Suspension, and sway bars?

Nino S

when was the last time it was aligned?

Biggraz

car was aligned very recently, all suspension and sway bars are stock

Dude_man

Base, gs, z51, z?

Biggraz

Grandsport

corvettepower

I have a gs also I'm having same trouble I was just gone go to 15's and see what happens

Dude_man

Add some Viking struts and a zr1 sway bar

Biggraz

I am Viking crusader double adjustables soon, was hoping that would work before I spend the 4K on 15s....

Slo-Poc

Are your saying your spinning at 80mph, as in your in third gear and your hit it and it's spinning. Now if your talking about doing a dig run and just blasting through first and second then put it in third at 80 and its hooking than I could see that. Ran the same setup at 930 and it hooked all of third. On blower I was almost hooking 2nd at 855. Try around 18psi and clean them off alittle before you go run.

Biggraz

If I launch at 60 out of third I will spin a little bit but it will stop around 80, if I launch out of 2nd gear it will obliterate the tires in all 2nd gear and third for like half the gear and that's pedaling it drastically. I always clean them before I make a pass. I will spin the tires all second gear not even half throttling the car. I'm sure my car on a dynojet is closer to 870-880. I'm on 16.5lbs with a great blower cam and lots of meth. I honestly don't know what to do if suspension and 15s can't get the car to hook I'm getting rid of it.

Detoxx03

I run the same tires and ridetech shocks with zr1 sways and hook 60 fine

neverstop

maybe everyone here is running lower psi with more heat? not sure how much experience you have with M&H and drag radials so maybe redundant but both my MT ET street R and even my 19" nt05r were transformed when aired down and got them nice and hot. Cold at 27psi I can spin the nt05r in 4th sometimes without even trying, hot and at 20psi they generally will even hook up 3rd pretty well.

Biggraz

How much power are you doing with a 19" rim? My car with mickeys on the 19" factory wheel would spin crazily all third gear. I'm starting to think my issue is a suspension issue not so much the tire. Can't believe I'm almost the only one with this problem.

neverstop

was at 870whp and now at 907whp. The Nt05r has to be very warm and aired down a lot to have any hope of hooking up 3rd for me. Even when everything is perfect it still hazes them just a touch through 3rd. It is a dramatic change from normal 26psi and street temps though, zero chance of hooking any part of third in normal street driving.

Biggraz

That's a ton of power for a 19" setup sounds like you hook better than me with it lol

95vettski

345/35/18 MT here and can only put power down in third and that's on a hot day and concrete road. About 22psi hot is where I have them.
Only other alternative is a 15" tire setup.

What's your rear camber set to? Try zero camber and toe in the rear and see if that helps.

neverstop

spinning 4th gear on the street is not hooking up well! hahah.....my car does not hook up well compared to other similar power level cars.

I'm with slopoc on this one, I'd say air the tires down to 17psi and get them super hot and then see if that makes a difference. Literally 1-2 psi less air on both the nt05r and ET street R made a noticeable difference in traction.