sprag or spragless?

[spitzerscott]

 Here it is , I'm looking at converters.  We have a 1500# R.E.D.  336 c.i. chevy, we are going to leave the line at 5000-5500, we have a 4:10 gear, so let's hear it.  Sprag or Spragless. We do drive the car to the lanes and back to the pits.  Let me have it!!!!

[jeff/21]

how big are your tires ? your running 366" and only 4:10 gears? as for the converter talk to your guy I have only run sprag type with small motors.

[BK]

I would think sprag. Your going to need all the torque multiplication you can get.

[gregm784]

I've run 331 - 387" blown motors.  4.10 gear, 32" tire, 1910# car.   Every converter guy i know says i don't need a spragless.  I took the sprag out years ago, saw no change in performance.  It repeats very well without it. 

we run a 7.60 index btw.

[JrFuel Hayden]

Yes, our coverter people have said don't run spragless. We run 7.0's @ 188-190 mph with injected alky 400 ci SBC, weighing 1435 lbs
Greg I did not know you are at 1910 lbs, and don't you run the 12" NTF tires, are they only 32" tall ?
Hope to see you at CHRR.

Jon

[spitzerscott]

Tires are 14.5x32 and the 4.10 gear is what was in it.  Most good race converters say, heavy duty sprag.    Thanks Guys.

[bikeguy307]

Every combo is different. Some work better with some without and some it seems to make no difference. Talk to your converter people and see what they say. In a perfect world we could try both and see what works best.

[gregm784]

Yes, our coverter people have said don't run spragless. We run 7.0's @ 188-190 mph with injected alky 400 ci SBC, weighing 1435 lbs
Greg I did not know you are at 1910 lbs, and don't you run the 12" NTF tires, are they only 32" tall ?
Hope to see you at CHRR.

Jon

I have the 13.00x16 NTF tire, it's 101", works out to about 32" tall.

[jeff/21]

spitzerscott is your 336 blown or NA?

[spitzerscott]

jeff21,  N/A  850 Quick Fuel alcohol carb.

[jeff/21]

ran 160 " fed 406 sbc with a 850 33x10.5 hoosiers ran 4.86 gears slowed when we changed to 4.10 now changed from the carb to injection have yet to race it since the  need a new block cracked in the rear camshaft and life has gotten in the way. all the big blocks ran 4.10 or 3.90 gears

[gregm784]

I broke a stator last month in my old trusty converter, so i had it cut apart to take a peak. 

Years ago, i had PDQ converters in Sacramento remove the sprag and go spragless.

Found out Friday, that they never did what i paid them to do, and my sprag was indeed slipping. 

PDQ sux.