M&H 14X32X15 tires

[aafa760]

Hello Everyone,
Has anyone run the 14X32X15 tire from M&H on there dragster?
Bruce? Rooman ?

Car will need new  slicks so looking at all the options.

4:30 gear 56% 2 SPD BBC 9000 RPM trap.
7.0 pro car to start

Best Regards
Bryan

[dreracecar]

Always ran a 33 x 12 x 15 tire on a 10" rim, never had any issues so no need to change to something else. I dont believe in the old BS about running a wider tire for a bad track, ran bad tracks and the 14" guys had more issues than me

[aafa760]

Thanks Bruce,
It has 14 x 32 15 hoosiers on it is why I was going to go back with same tire,

As you may remember this car it is Rick Whites old A-Fuel car before bead locks were required so he probably ran them.
I don't think the guy who I got it from ever ran it down the track but once or twice.

maybe the 33 X 12 would plant better
 
how much growth do you figure in a tire 33 grows to 37
Bryan

[dreracecar]

every inch of growth is 200rpm  so at 37" 8000rpm is 204mph, But thats hooked up tight, you will lose 15mph with a converter so you will need 8400rpm in the lights to hit 200mph (average 7.0 mph w/ converter)

its not plant as much as its getting up on the tire, My car was fairly light at 1640 (3.90 gear) with driver and I left off the hand brake at high idle. Thats what I found worked for me

[aafa760]

Rooman ,Bruce
Looks like I need some new rear rims
So might try and see what bead locks everyone runs in 7.0
I read the a-fuel limited to 15" wide
16 or 15 diameter rims?
Ultimate class is a-fuel but need to get use to the new long car.

Any suggestions.

[dreracecar]

The problem with BL is that you must run a smaller dia brake rotor to move the caliper away from the locking ring. It was a big surprise to the AF guys when this stupid rule was put in place. Was not a problem for the fuel guys because they run 16" and have 1/4" caliper to ring clearance with the large dia rotor.

[aafa760]

Bruce
Wow never heard that they had issue
So does anyone make 15 liners?
Does not appear so
Does a-fuel guys run 16 dia rim or 15?

Man the aa/fa we run liners but 16 rim
And tried BL in CIFCA day but hurt reaction times.
So went back to the liner.

A-fuel requires BL right?

[dreracecar]

AF started requiring BL after a racer in AF had a tire come off a rim While backing up, Zero ivestagation as to low/leaking air pressure, damaged rim, no screws, Just some Screwball tech wannabe throwing out a bad solution. Having worked on many N/TF cars and knowing the clearence between caliper and rim was tight, I questioned him how that was going to work with a 1" smaller dia wheel?? Strange already has a smaller dia rotor because they use the same rotor for everything. The M/W and SPE units all were running the larger dia rotor. Racers were grinding on the calipers and the beadlock rings to get to fit untill those companys made the smaller rotors and caliper mounts.

 No Manuf. makes a suitable rear tire for AF in a 16" dia and the 15" NASCAR liners are not wide enough

[JrFuel Hayden]

Kin Bates , with a Dean Adams [ Gene's son] early Hemi has won all but one of the Heritage Championships in A/F and for the last 3 years racing with the M&H N/TF 12x16 tire. The reason they switched was Kin would shake his fillings out with tire shake with the 14.5x15 or 15x15 Goodyear and Hoosier.
Tried the N/TF tire and shake went away, I think the best they have run is 6.19 @ 230 mph on their injected Nitro FED.

Jon Hansen, Hayden Wheels

[aafa760]

Hey Jon
Thanks for the information.
I will see if I can find a test to see if they might fit.