I'm wondering if maybe I should put the new tires on my 10" rims.....although that might be a tad wide for a 9" tire.....

14# seemed to be what the car liked last season....I went up to 15# late Saturday during time trials but that was as far as I got by the end of the day.

I killed a set of hoosier qtps in less than 20 passes!
Heavy car with a stick.
But same symptoms as you have.
Hooked good and then next race didnt even try.
I was going from 1.7 60s to 2.0!!!

I run the Hoosier radial 30 x 9 slick at about 16 psi. Seems to work good for me but the radial is different then the bias tire and I believe the radials have a stiffer sidewall. Ron

I just never had the time to try 16-17#'s Ron....looking at the picture, I can see the rim is just killing the tire. The car weighs 3650 with me in it, so it's definitely a heavy weight. I ran 295/65 15 ET street radials at Pinks All Out with 17# in them and it hooked violently !!! It's just that I run at a couple of strips that (just like Dustin says), have track prep issues. The BIG tired cars don't have much issue, but I'm not cutting up a virgin Challenger's wheel wells to get some meat in there.
I'm just trying to get rid of !!!

It still hooked good at Mission Raceway last September, but their track prdep could have been masking my up-coming issue.

I think Mike (Mr P Body) has hit the nail on the head.

My car punishes the sidewalls as well. I would reccomend you install tubes with the new tires.

Just ordered some Dustin.....Thanks you guys !! It'll be 3 weeks or so before I can report back, but I'll be sure to do so.

You have to screw the tires to the wheel with tubes, otherwise you run the risk of ripping the valve stem out.

All my tires are screwed to the rims. My 10" rims still have what's left of some 29 x 10's on them with tubes. Learned the hard way once before!

Here is my 30 x 9 Hoosier radial slicks that look to have stiffer sidewalls. I do not use tubes and do not screw the tire to the rim. No Cal Tracs for me just SS springs. I like the radial slicks as they usually seem to hook ok even when the track is not prepped well. I hear others say they dont work as good for them on a track not prepped good. This pic is with 16 to 17 lbs of air. But my best 60 ft is a 1.50 at 3700 lbs and a 9.5 Dynamic converter. I guess not bad for a leaf spring steret car. I wonder how your car could would work with radial slicks ? Course I drive on the street with them also as I like this size because nothing rubs even on turns but no one makes the 30 x 9 in drag radials. Do you usually run at the same track or can you try another track with them ? And you car 60's good going in the 1.40's is very good for the et and weight. Ron

The car hits hard Ron.... And I had the converter tightened a bit last August.It used to flash to about 4800 and now it's more like 4300. I leave at 1800 RPM on the footbrake....I'd hate to see what the tires would look like if I had a Trans brake and letting things go at 4000 !!! Mission Raceway isn't open yet because of the track being ripped up and resurfaced...Probably not going to get any 1/4 mile runs until August. So I'm stuck with my normal tracks. I will have new tires and tubes next week.
What the heck...it's only money ain't it ???

You are right as its only money. And I never have enough of it. Let us know when you go back to the track on the new tires. Good luck , Ron

i think your engine is a lot more sharper now with the single on it and it is smackin the tyres harder

You are probably right Ian.....It's definitely more responsive off the line so I'm sure the tires are feeling the brunt of everything. I was about 1 MPH faster this weekend than normal even with the tire spin and a headwind.
I'll get this SOB figured out....Tubes are here and tires by the weekend.....the beer budget kinda took a BIG hit !!!

Head wind.......?

Honestly Richard, I think it's 2 things. Very little track prep, and your making more power.

I tried NOT to make any changes til Sat afternoon, atleast there was a "starting line" by then.

You'll get it.

It was later Saturday before elims that I tried to mow the grass......right out of shape to the left partially off the track. I never did find any "Track"......I think they forgot the VHT completely !!!

At the beginning on Saturaday, there was a fair bit of wind. It died down around 1:00

Well.... here it is in a nut shell.....

Put a new set of 30 x 9 Hoosier's and new tubes on my 10" Prostars.

First pass was a best 6.80 @ 103.60
Second pass was 6.75 @ 103.78
Then back-to-back 6.77's lifting in eliminations.

Car got the 60 foots back to 1.45 and tracked straight as an arrow !!!

I think I found my gremlins!!! Thanks for the feedback guys....