Wow, Supercat, I'm impressed, 1,000 hp on a NA alky FED, the only JrFuel cars I know that make that kind of power is Scott Parks, and Brian Darcy. And they run 6.70's. What size is your motor and are you running nitro ? Another question, why does your car/ driver weigh 1760-1780. Our JrFueler weighs 1440 with an all iron motor and driver, where is your extra 300 lbs ?
Ok, back to your question, most fast JF cars are running 12" wide wheels, because anything narrower it gets loose at start or after the shift to half track. We ran 10" rims for years, then found out we needed more traction at Bakersfield when sun went down and the track got loose. Then as we made more power we ran the 11" [ nite time Bakersfield] wheels were need more often, so I put together a set of our 31x12x15 GoodYears on 12" rims, which is what we run most of the time now in JrFuel "B". Downside to 12" rims is the tires will not grow as much so we get a little slower top speed [ 187 mph instead of 189]. Most slick guys say don't go over/under 1" difference on the rims than tire width. But I know a number of racers are running 12" tires on 10" rims, just lower HP cars.
I just talked to a RED Comp racer this week-end while we were racing Comp at the Div 7 race in Sonoma, and I sold him a pair of used 33x12x15 GoodYears because his 33x12x15 Hoosiers get loose at half track and they don't grow as much as the GY's. But the Hoosiers have softer compound rubber.
I have a set of 33x10.5 x15 M/T but I have heard they need to be on 14" wide rims to work. Too bad our rules limit us to a max of 12" rims, plus they are REAL heavy, like 45 lbs on wheels EACH. Our 31x12x15 GY's weigh 26 lbs each, mounted. It takes more power to rotate that extra 20 lbs each.
Anyway that's my 2 cents.
Have Fun, Jon Hansen, Hayden Wheels
BTW we run allot of 7.0's using a 8700 rpm converter, and 4.88 rear gears and 1.68 first gear PG