We are building a car that may compete in NDRA's Power Street class. And to
be honist I know nothing about drag radials. It looks like BFG is the tire to use.
My question has to do with rim width, tire pressure, and suspention setup. If it
had slicks I'd know what to do! Any idea what kind of 60 foot times can be had
with these tires?

Thanks in advance!

Steve

the best I have pulled in full PW/S trim is 1.8's on the 225/60/15 BFG's at about 11-12psi cold. they like a lot of heat in em. they are on 15x6.5's

on the 235/60/15's I mounted on some steelies slowed me down but eliminated most of the wheel hop I had in 1st gear and pulled 1.9's on em for the 3 passes I used em. these are on 15x6 heavy steelies.

those 60fts were all on stock ITR suspension with 99k miles on it

steve, with boost i would think you can dial in for 1.7-1.8's
in seet stock (all motor) we cut 1.8-1.9's low rpm launches on 225's with decent burnout and 10-11psi.

the newer the bfg's the tougher they will be until you break them in overtime.

Greg

Ive cut consisten 1.8s with 225 50 15 drag radials in my power street car
with a spoof at atco against jim hucks i cut a 1.78 60s

so 60s can be had on these but suspension and tire pressure track play a big part

and when tracks are bad there very bad with the radials

good luck racer steve

see ya at the races

dan

Consistent 1.42's on the 275/60/15 mickey thompsons, vs. 1.50's with an OCCASIONAL 1.49 on the same size BFG's for my car, to give you an idea of how much better the MT's hook. MT is supposedly coming out with 225/50/15 size, so if you can get some of those that would be stellar. Not sure what the class rules are, but would a 235/60/16 be allowed?

NOT aloud the run the MT becuase there more like a bias ply tire
unless there coming out with a new one that will get approved

were basically stuck with NITTO , BFG's (i think) Hoosiers are allow now

i dont even know what other ones there are

good luck
dan

BFG's work out great for Sam Mahdavi. His Supra run's 9.4's on a 315/35/17 BFG w/ FACTORY IV wheels.




Modified by R.S.AKIMOTO at 7:06 PM 6/6/2006

205-50-15 bfg 12psi 1.71 60'....the balder the better.....2 inch lowering springs....
as long as you can take away the torque steer with suspension mods 1.7 - 1.9 easily obtained.....

Max tire size is 235 whatever.... The rules say Nitto, BFG, and Dunlop Direzza.

http://ndra.nopi.com/2006/ndra_sportsman_rules.pdf

Hmmm, so 1.7's are doable on a porky 2600 pound car? This could be fun..... Is there a way to tune around the awful tire shake I've gotten
in the past with radials?

Sams' been cutting 1.5 60ft. on this BFG's

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R.S.AKIMOTO &raquo;</TD></TR><TR><TD CLASS="quote">Sams' been cutting 1.5 60ft. on this BFG's</TD></TR></TABLE>

I used to cut 1.5s in a RWD Miata, but that is RWD. a 1.7x would be a good 60ft in a Turbo FWD.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RacerStev &raquo;</TD></TR><TR><TD CLASS="quote">Max tire size is 235 whatever.... The rules say Nitto, BFG, and Dunlop Direzza.

http://ndra.nopi.com/2006/ndra_sportsman_rules.pdf

Hmmm, so 1.7's are doable on a porky 2600 pound car? This could be fun..... Is there a way to tune around the awful tire shake I've gotten
in the past with radials? </TD></TR></TABLE>

not that I have found. pretty much just ride the crap out of the clutch to get it to hook smoother.

1.7 is killa for FWD w/ radials!

I was just giving PROPS to the BFG's!!

This one will be a automatic....

i never had any shakewith drag radials,,never....my car was about 2700 with me....ran 13.5@109 for a full year before i nuked my t3 and the wife made me retire the beast...

Any other advice for cutting good 60's on the BFG's? I have a set of worn 205/50/15 BSG's that are pretty bald but also a couple years old. Second gear burnout and 10psi cold as I have read on here netted me a 1.97 and a 1.98 at Atco. I want something more like a 1.8. I was launching at 3k and pretty much just letting the clutch out fast. Any higher and I just spun. I know I need to work on riding the clutch out and maybe a little higher of a launch rpm.

Would stiffer springs in the rear help that much? I have adjustable coilovers dialed full stiff in the rear. Its a street car/semi-daily driver so I don't want to go to 1k spring rates or anything. Is there a compromise that is still streetable but will help on the 60 ft?

Should I keep playing with the 205's or just bite the bullet and get a set of 225's? I have another set of new 205's from another project so I wouldn't mind getting the 205's to work. On the other hand the car is only going to be making more power so eventually I know I will have to go up in tire size.

remember spinning is not necessarily bad, accessive spinning is bad, spinning and accelerating is good

tighter the suspension better the 60s to a point, preload also will help 60ft, its a combination of things that makes 60s come down, lots of heat, and constant forward movement

dan