MT ET Street Radial Tires

[1989TransAm]

Doing a couple of engine mods than back to the track. I have the MT ET Street Radials on my car with an A4 transmission. From what I have heard they do not require much of a burnout.

I have been lowering the pressure and the last run was the best at 15psi. Next time out I plan on going to 14psi. So the questions would be what length of tire burn out is best and what air pressure has worked best?

[jeff swisher]

how much air pressure depends on vehicle weight tire width and rim width..I will do a dry burnout just leave a couple of black marks on clean concrete and look at the pattern if it is darker and more dense in the middle than the sides i will let some air out
If it is darker on the outsides i will add air untill it is all even....As far as burn out i usually listen to the tire to change pitch and a dry hop to see if i got it ...but that all depends on vehicle.....Start with short burnouts and work your way up till you find your sweet spot

[1989TransAm]

Thanks Jeff. Going to the track here in SoCal you are lucky if you get 3 passes a day. Got to make the most of it.

[jeff swisher]

have fun our track opens sunday weather permitting at least that is what my son told me....maybe i should take my E150 and put a whoopin on his turbo Z

[DOTracer]

Start at 16 psi and go UP. Radials are meant to be run at higher pressures, not low.

The sweet spot is usually between 18-22 psi cold. I have run 3 different M/T sizes and now testing Hoosiers new DOT D/R. All have worked well with 17.5 to 18 psi cold which puts them at 19 psi hot.

I do a short burnout. I run a th400 starting in second gear, immediately going to high and count to 3 or 4 at most. If it's real hot, I shorten that up to a 1 or 2 count.

Best 60' thus far has been 1.289 footbraking a N/A 461 bbc in a 3400 lb car.

[1989TransAm]

Thanks for the reply. With as little track time as I get I was hoping to get a short cut to the sweet spot from others experinces.