Will a gear change help a redlighting problem in my bracket car?

Mark Yacavone · 06-01-2009, 06:36 PM

Quote:

Originally Posted by Everett Vassar

I have trimmed maybe half of the rubber stoppers off.Think I will just take them out.Sat I had 27lbs air in front.Can I safely go down to 20? Mark What if i cant get a light on a .5 pro tree Does that tell me I'm anticipating and leaving with the bottom yellow? Sure doesnt seem like it.Am going to T&T Wed to try a couple things.-----But still--will going from 4:56 to 3:91 slow down the cars R/T? with everything else being the same? I have a new converter here I just got (BTE) Havent had time to swap it out.Will a looser converter slow down R/T?

Yes, to the question directed to me. Some of the guys over on the .90 side (Super Street ) are coming out WFO at 5-6000 to get a light on the .5 tree.

The gear change effect would be miniscule, the way I see it.
Yes, it is possible to tailor a converter flash loose and then hit hard, but I don't think that's your problem.
Won't the car idle at 1500?

Everett Vassar · 06-01-2009, 06:43 PM

Won't the car idle at 1500?

Maybe. Was having a hard time keeping it at 1800 Soon as you do anything it wants to go to 2000 Before Wed T&T I think I will pick up a stiffer throttle return spring and drop the air to 22 or 20 lbs

HawkBrosMav · 06-01-2009, 08:48 PM

I just went from a 4.56 to a 4.33 in my bracket car has about the same 60's and runs 6.90's in the 1/8th. Mind you i have a glide in mine but even this small change moved my spot on the bulb a noticeable amount. I went from having to hang on the bulb just a bit to being able to just let go like it was the top bulb. car weighs 2850 with driver. this is with a small block leaving at 3000 Rpm. with 32lbs of pressure in the fronts. 26" tall fronts. car wont yank the tire out of the beam so if yours is already picking it up out of the beams i dont know whether the gears will help.

doorslammer · 06-02-2009, 12:49 AM

I know this is big motor , what the intake center line, whats the duration , Tying down the front end .Try slowing down the carburator . Can you post your et and mph in the quarter . Does this car wheel stand .

Doorslammer

Chris1529 · 06-02-2009, 05:16 AM

The car will stall higher if you drop the gear ratio.

Rory McNeil · 06-02-2009, 07:45 AM

I don`t know if anybody still makes them, but about 15 years ago, a buddy ran a bracket 70 Duster with a 440, and the headers that he used were from Bill Bagshaw, all the tubes went inside the frame rails, (I think) so that tire fitment was not an issue.

Mike Pearson · 06-03-2009, 06:01 AM

The vast majority of bracket racers use a delay box. This is a sure fire way to correct your red lighting problem.

HawkBrosMav · 06-03-2009, 08:08 AM

"The car will stall higher if you drop the gear ratio."

ummm can you explain this theory to me?

"The vast majority of bracket racers use a delay box. This is a sure fire way to correct your red lighting problem."

i beg to differ... there are just as many racers that run in a "footbrake" or "No-e" class and delay boxes are illegal. there is more to bracket racing than big block dragsters.... i still have no idea how some people consider bracket racing different from stock/SS yea there are more rules as far as motor and car combo but the 99% of the rules on the track are exactly the same....

Everett Vassar · 06-02-2009, 11:07 AM

I just went from a 4.56 to a 4.33 in my bracket car has about the same 60's and runs 6.90's in the 1/8th. Mind you i have a glide in mine but even this small change moved my spot on the bulb a noticeable amount. I went from having to hang on the bulb just a bit to being able to just let go like it was the top bulb.

This exactly what I want right here! The courage to rip it without fear as long as I know I HAVE to see it come on.
So does this prove my theroy that changing rear gear ratios will have the same overall effect as changing gear ratios in the trans? Just a lot cheaper Maybe a 4:30 or 4:10 will be enough.

DOORSLAMMER: Its a .550 lift Crower flat tappet Cant remember the other specs right now.Better not have to change my cam to fix this car------ALTHOUGH this motor used to be in a heavier car and I selected this small cam because the other car was a real dog footbraking.
When you say "slow down the carb" You talking a heavier spring?

sst1226 · 06-02-2009, 02:01 PM

Do you have adjustable shocks in the rear? Perhaps softening them up a few clicks would also soften the "hit" of the car coming out of the hole?

06-01-2009, 06:43 PM	#2
Everett Vassar Member Join Date: Jun 2004 Location: Kennedale,Tx Posts: 227 Likes: 0 Liked 2 Times in 2 Posts	Re: Will a gear change help a redlighting problem in my bracket car? Won't the car idle at 1500? Maybe. Was having a hard time keeping it at 1800 Soon as you do anything it wants to go to 2000 Before Wed T&T I think I will pick up a stiffer throttle return spring and drop the air to 22 or 20 lbs

06-01-2009, 08:48 PM	#3
HawkBrosMav Member Join Date: Apr 2009 Posts: 362 Likes: 6 Liked 302 Times in 73 Posts	Re: Will a gear change help a redlighting problem in my bracket car? I just went from a 4.56 to a 4.33 in my bracket car has about the same 60's and runs 6.90's in the 1/8th. Mind you i have a glide in mine but even this small change moved my spot on the bulb a noticeable amount. I went from having to hang on the bulb just a bit to being able to just let go like it was the top bulb. car weighs 2850 with driver. this is with a small block leaving at 3000 Rpm. with 32lbs of pressure in the fronts. 26" tall fronts. car wont yank the tire out of the beam so if yours is already picking it up out of the beams i dont know whether the gears will help.

06-02-2009, 12:49 AM	#4
doorslammer Junior Member Join Date: Mar 2005 Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: Will a gear change help a redlighting problem in my bracket car? I know this is big motor , what the intake center line, whats the duration , Tying down the front end .Try slowing down the carburator . Can you post your et and mph in the quarter . Does this car wheel stand . Doorslammer

06-02-2009, 05:16 AM	#5
Chris1529 VIP Member Join Date: Dec 2006 Location: West Virginia Posts: 1,367 Likes: 6 Liked 70 Times in 29 Posts	Re: Will a gear change help a redlighting problem in my bracket car? The car will stall higher if you drop the gear ratio. __________________ Chris Bowman The Mountain State Mustang 1984 Mustang GT350

06-02-2009, 07:45 AM	#6
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,312 Likes: 323 Liked 1,113 Times in 304 Posts	Re: Will a gear change help a redlighting problem in my bracket car? I don`t know if anybody still makes them, but about 15 years ago, a buddy ran a bracket 70 Duster with a 440, and the headers that he used were from Bill Bagshaw, all the tubes went inside the frame rails, (I think) so that tire fitment was not an issue. __________________ NHRA 6390 STK M/S 85 Mustang

06-03-2009, 06:01 AM	#7
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,476 Likes: 633 Liked 1,998 Times in 602 Posts	Re: Will a gear change help a redlighting problem in my bracket car? The vast majority of bracket racers use a delay box. This is a sure fire way to correct your red lighting problem. __________________ Mike Pearson 2485 SS

06-03-2009, 08:08 AM	#8
HawkBrosMav Member Join Date: Apr 2009 Posts: 362 Likes: 6 Liked 302 Times in 73 Posts	Re: Will a gear change help a redlighting problem in my bracket car? "The car will stall higher if you drop the gear ratio." ummm can you explain this theory to me? "The vast majority of bracket racers use a delay box. This is a sure fire way to correct your red lighting problem." i beg to differ... there are just as many racers that run in a "footbrake" or "No-e" class and delay boxes are illegal. there is more to bracket racing than big block dragsters.... i still have no idea how some people consider bracket racing different from stock/SS yea there are more rules as far as motor and car combo but the 99% of the rules on the track are exactly the same....

06-02-2009, 11:07 AM	#9
Everett Vassar Member Join Date: Jun 2004 Location: Kennedale,Tx Posts: 227 Likes: 0 Liked 2 Times in 2 Posts	Re: Will a gear change help a redlighting problem in my bracket car? I just went from a 4.56 to a 4.33 in my bracket car has about the same 60's and runs 6.90's in the 1/8th. Mind you i have a glide in mine but even this small change moved my spot on the bulb a noticeable amount. I went from having to hang on the bulb just a bit to being able to just let go like it was the top bulb. This exactly what I want right here! The courage to rip it without fear as long as I know I HAVE to see it come on. So does this prove my theroy that changing rear gear ratios will have the same overall effect as changing gear ratios in the trans? Just a lot cheaper Maybe a 4:30 or 4:10 will be enough. DOORSLAMMER: Its a .550 lift Crower flat tappet Cant remember the other specs right now.Better not have to change my cam to fix this car------ALTHOUGH this motor used to be in a heavier car and I selected this small cam because the other car was a real dog footbraking. When you say "slow down the carb" You talking a heavier spring?

06-02-2009, 02:01 PM	#10
sst1226 Junior Member Join Date: Jun 2005 Location: Newark, DE Posts: 64 Likes: 2 Liked 11 Times in 2 Posts	Re: Will a gear change help a redlighting problem in my bracket car? Do you have adjustable shocks in the rear? Perhaps softening them up a few clicks would also soften the "hit" of the car coming out of the hole? __________________ Mario DiTeodoro III SST/SG1226 STK126M

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