Having trouble hooking my car with my ET street radials. The conditions have to be just right or I blow the tires off. I had it close at Thompson and made some spring and shock adjustments and went to Quaker and made eleven passes on three days the 60' were all from 1.50-1.54 and life was good. I go back to Thompson Wens. I was all over 1.80,1.73,1.80,1.69. I'm thinking about trying Hoosier Q.T.P people say they are a little more forgiving. My ET radials are 315/60 with a rollout of 94" and the Q.T.P. tire 29/13.5 is 92". Will I notice a change?

Its not the tire....

What are your thoughts?

Thanks for the advice but I have used 130#,150#,170# springs works best with the 150#. I have adjusted the shocks from 1 through 5 on my QA-1s. I have ran the psi from 18 all the way down to 12 psi. I have left from idle to all the way up on the convertor so you can see it's not like I went out one time and spun. The only place I fall short is the front end where the up grade is a set of QA-1 adjustables and thats it. I would like to make the car work with a set of $400 tires before I would spend major money on the front suspension. I have used these tires on other cars and they worked fine but like you said not all cars are the same.

Just another point to consider. Whilst I can't comment on M/T Drag Radials, I have used M/T Radial slicks. I found these to be very dependant on the track prep. On a good track they hooked better than the regular bias ply but the bias ply are more forgiving on a less well prepared surface. HTH's

I am running a pro drag radial on my Challenger. It is not a street tire but radials are way less forgiving than regular bias slicks. I can race my car at four out of the five local tracks we have around here. The other track I can never get down without just completely blowing the tires off of the car. They are dependent on a good surface. The track prep at the track your having problems with is most likely the cause.

Whats the travel on the front... what rear suspension...
take video... its the only true way to see whats happening

i,d be lookin at thompson not the tires.

Thompson doesn't prep their track on Wednesday nights. That has always been their "grudge night" where you race what ya brung. Kids show up in anyhing from their mommies Toyota to pick-up trucks dropping mud all over the track. I've pretty much given up on T&T'ing there.

On my car I had to change the setup a lot to get the radials to work on a consistant basis. My rear shocks are set to full soft on both compression and extension. When the traction is really good in cooler weather I can tighten the compression some. I also have front coilovers and have been going to lighter and lighter front springs to store more energy. I also put the front of the ladder bars up a hole to hit the tire harder. These radials since they don't rinkle really need to be hit hard. Also put a little weight in the trunk. Hope some of this helps. I run the pro drag radials because when they hook they are deadly consitant so getting them to be happy every pass is the name of the game for me. Good luck.

Here is a good program I found that can show you effect of tire size and staging depths, which I have found to be very accurate on my car: http://performancetrends.com/Drag_Race_Practice_Tree.htm

Thats what I was looking for,I know they are good tires but want to go out and just race and have fun. I think the Hoosiers from what I have been told may be a little more forgiving on a track with poor prep. Want to set it and race.Just don't know how much 1/2 inch shorter tire will change things. Understand the size is a fitment issue not trying to solve the problem with tire size.

Around 1984 I bought a Challenger from a friend who had fabricated a home-made chassis and suspension for it. It ran fairly well and I was winning races, but it was not quite as consistent as thought it could be. Putting an extra 130 lbs in the trunk help consistency a lot and didn't slow it down much. (Just install it safely and securely, by the rules.)

The car is back halved and with the fuel cell not to much room back there. Wish I could get more movement out of the front, it seems like it spins before the front tries to do anything.