one problem may be with the 32x12x15 Hoosier , when Goodyear stopped making for inventory a number of part numbers , one was the designed for JrFuel racers 31x12x15 light weight [ 26lbs] tire and since the JF rules and A/ND & B/ND Comp rules are 12" max wide tires , I called all the slick makers to see what they have. Hoosier said they had 31, 32and 33 tall 12" tires, BUT the 32 tall may not work for 2 speed dragsters , because Hoosier mad that tire with a softer compound for heavy door cars where they deadhook, shift, deadhook, shift, deadhook, not getting some tire speed like FED to keep the egine RPM in the power range. Also tire shake seams to come with not enough power or too much bite. Which a couple of slick makes agree that the trend of tracks spraying too much VHT, so that makes the tires dead hook and shake. Don Enriquez engine builder/tuner asked one ot our Heritage tracks to not spray any more VHT before JF races, it worked and A/F liked it better too.
One of the quickest running A/ND & B/ND Comp cars runs a 29x10.5x15 MT and just ran a 6.79 in St Luis. On our JrFuel car I'm about to try M&H 30.5x10.5[ 11.25] x15 on 12" rims next season. M/T, Hoosier, M&H all have stiffer sidewalls and are at least 32 lbs . Rotating weight takes more power to turn.
You could try lower tire pressure , it help getting more tire speed. With our Goodyears we have run as low as 4 3/4 lb on 12" rims. We started out on 10" rims then when we added power we needed more bite , so 11" then 12".
I hope this helps.
