front tire size worth in delay

[racer913]

I have ben having a problem with being able to go red I need to know what tire size is worth in roll out delay I have 26" tires on and I need about .010 would a 28" tire work?

[Mark Yacavone]

All else being equal, they should be worth.....something.
Sorry for the nonspecific answer, but the question is that way ,too.
BTW, if you're on a pro tree, shouldn't you be over on the .90's forum?

[racer913]

bottom bulb full tree I know a larger tire will help slow down reaction time, added roll out i was hoping others have tried different tire sizes and found out what size is worth what

[greg fulk]

Worked for me.... dad needs to do the same thing right now... @ the local 1/8 mile track he only runs 18psi in the fronts (26")

[Mark Yacavone]

Originally Posted by racer913

bottom bulb full tree I know a larger tire will help slow down reaction time, added roll out i was hoping others have tried different tire sizes and found out what size is worth what

Lower the RPM

[treessavoy]

I'm a little confused (not an uncommon state) but why would a tall tire slow reaction time?

Stock drivers are known for the quickest and consistent reaction times and most of us run tall tires.

Not a slam against you electronic guys.

[THE LEGEND]

Mark,
Why would you think he is a .90 racer. Even if he is what difference should it make the driver has a problem.

913,
I think the tire will help but not very much. The problem you will run into is it may help a race or two, then you will get comfortable and start going red again. I bottom bulbed for over 20 years. When the Led's came out it screwed me up. I fought it for 5 years. I built 3 different cars. Different e.t. range. The problem always came back. I won a lot of races and finished high in the points too, but the problem always came back. Not saying I gave up but I moved on. I found a home in Delay Box/.90 racing for now. I may come back one day, but will have to build a "BETTER MOUSE TRAP"
Some things we tried on the last 2 cars.
Tires-front and rear
RPM
Blocking
Timing
Rear Gears
Transmissions
Trans gear ratios
Convertors(Lots of them)
Headers
Header collectors
Traction bars
Weight (LOTS OF IT)
Weight in different locations
Mufflers
DeTune the motor which worked somewhat but did effect consistancy and then when you get a heads up you are out to lunch.
De Tune- with Cam Timing, different oil, More oil, We ran a holley and tried it on 2 bbl. etc, etc, etc,

We were trying to kill the initial move of the car but keep it fast and consistent.

Good Luck.
Chip Johnson

[SmallBlockNova]

Originally Posted by treessavoy

I'm a little confused (not an uncommon state) but why would a tall tire slow reaction time?

You get a longer "run" at the beam before you knock the stage light out and start the clocks..

[Ed Wright]

Originally Posted by treessavoy

Stock drivers are known for the quickest and consistent reaction times and most of us run tall tires.

Really?? First time I've heard or read this. The only National Dragster I have on hand right now has E-Town sportsman coverage. I averaged the Comp, SS and Stock elimination round reaction times. Comp had 8 red lights, average reaction time was .0675. (Wonder why Fletch and Biondo do so well there.) SS had 4 red, average reaction time was .0335, Stock had 3 red, average was .0448. The .90 classes, of course, killed us all. Should with all the crap they have on those cars. I can't see why foot brakers would have any advantage, from what I have seen S & SS are normally pretty close in that dept.

[Jerry Hatch]

Originally Posted by racer913

I have ben having a problem with being able to go red I need to know what tire size is worth in roll out delay I have 26" tires on and I need about .010 would a 28" tire work?

racer913,

Depending on what you have for a car, a two inch taller tire may be exactly what you are looking for in reaction time gains (or in your case, loss). I bracket raced a ’65 Dodge Coronet 500 2 dr. hardtop for nearly 14 years with the same combination. It was making approximately 425hp, ran 7.50’s 1/8th and 11.90’s in the ¼ with 1.55-1.58 60 ft depending on the track and conditions. I was not happy with my reaction times with a 26” tire in the beginning and went to the taller 28” tire. After doing so, I lost approximately .010 - .015 in reaction times. My car weighted nearly 3600#. Keep in mind that air quality plays a substantial role in how quick a car of this weight and hp moves off the line. Lighter quicker cars will not see the same loss in reaction times as a heavier car with this same tire change. Jerry.