Clutchless trannys in SS Modified NHRA
 

What does NHRA allow in SS Modified, Clutchless 4 speeds or 5 speeds or both. Any help would be appreciated. Thank you, Mike

Mike Galuk
JOE COOL RACING
M/SA-2000

Re: Clutchless trannys in SS Modified NHRA
 

Recent rule change; you can now run clutchless in traditional SS and that trickles to the modified. Traditional SS still has to run the correct number of forward gears as per OEM.

Re: Clutchless trannys in SS Modified NHRA
 

are you sure about that last sentence??? lol I thought the 55-56's bel air's could run 4speeds now....

Re: Clutchless trannys in SS Modified NHRA
 

55's and 56's are allowed to run 4-speeds. The Modified classes are allowed to run 5-speeds.

Re: Clutchless trannys in SS Modified NHRA
 

This is true, in any car that came with a 3sp manual standard, can now have a 4spd. BUT, this only came about AFTER nhra allowed powerglide combo's only, can have a 3spd auto. Man what a mess....I think there is a weight break diff between the Sticks and Autos in SS Modified? That needs to be lifted.

Robert

Re: Clutchless trannys in SS Modified NHRA
 

I still think modified stock is still limited to 4 gears, i thought that might be lifted beings i think lots of the newer cars come with 5 gears. Correct me if i'm wrong.

Re: Clutchless trannys in SS Modified NHRA
 

Yep, forgot about those 3-speed manual exclusions. So how much did those pick up with the 4-speed conversion? It sounds like those that lost the PG in exchange for a turbo type trans picked up a bunch.

Re: Clutchless trannys in SS Modified NHRA
 

I replaced the ultimate Rossler PG in my GT/IA (327/250/258 - 3300 lbs) car last year with an ultimate Rossler Turbo 350 and picked up .................................................. .. Nothing!
Nothing in 60', 330, 660, 1000 or 1320.
Dave Smith, who built the Pro-trans in my son's GT/BA Camaro, watched several runs at Bakersfield and swore the car LOOKED faster but comparing time slips showed NO difference. He felt perhaps flogging ratios or converters might find something, but it would be insignificant. Now this was just my combo. Your results may vary. The PG is back in mine since the Winters, just in time to trash my last set of 520 heads.
The fun never ends.

Re: Clutchless trannys in SS Modified NHRA
 

I was talking to Kip Martin and he said the SS/LA really made some ground on his SS/L Mustang. Of course that is a class populated by the small V-8's, 283 & 289 and I would think a Turbo would provide more benefit than a larger mid-size V8.
But as you've found out, you've got to open up that wallet to find out! But now you know...