Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
Big Tire Cars #1686417
10/16/14 10:48 AM
10/16/14 10:48 AM
Joined: May 2014
Posts: 503
Idaho
1320Dart Offline OP
mopar
1320Dart  Offline OP
mopar

Joined: May 2014
Posts: 503
Idaho
I've been having an argument with a guy I work with. So please chime in.....

Is there such a thing as "Too much tire"?
If there is, what are the key things to look for?

Thanks for playing


Greg

-----------------------------------------------------------------
Cost is irrelevant, making memories is far more valuable!biggrin
Re: Big Tire Cars [Re: 1320Dart] #1686418
10/16/14 11:35 AM
10/16/14 11:35 AM
Joined: Feb 2003
Posts: 958
Addison,IL
OUTLAWSSAA Offline
super stock
OUTLAWSSAA  Offline
super stock

Joined: Feb 2003
Posts: 958
Addison,IL
Ya,if its a 10 or 11 sec car,there's no need to run a 14 X 32 tire. In reality its probably slowing the car down.

Re: Big Tire Cars [Re: OUTLAWSSAA] #1686419
10/16/14 11:45 AM
10/16/14 11:45 AM
Joined: Aug 2013
Posts: 369
Indy
496 A-body Offline
enthusiast
496 A-body  Offline
enthusiast

Joined: Aug 2013
Posts: 369
Indy
Quote:

Ya,if its a 10 or 11 sec car,there's no need to run a 14 X 32 tire. In reality its probably slowing the car down.




Definitely, I know this SS/KA car shaved off considerable ET by simply going from a 14x32 radial slick to a 10.5x30 radial slick


Re: Big Tire Cars [Re: 496 A-body] #1686420
10/16/14 12:09 PM
10/16/14 12:09 PM
Joined: May 2014
Posts: 503
Idaho
1320Dart Offline OP
mopar
1320Dart  Offline OP
mopar

Joined: May 2014
Posts: 503
Idaho
How did you know it wanted a smaller tire?


Greg

-----------------------------------------------------------------
Cost is irrelevant, making memories is far more valuable!biggrin
Re: Big Tire Cars [Re: 1320Dart] #1686421
10/16/14 12:17 PM
10/16/14 12:17 PM
Joined: Jul 2010
Posts: 2,419
Pittsburgh PA
Eric Offline
top fuel
Eric  Offline
top fuel

Joined: Jul 2010
Posts: 2,419
Pittsburgh PA
Depends on what you are trying to do. I know some very successful bracket racers who run huge tires on realitively slow cars just for consistancy.


5.53 @ 125 1/8th on the launch control..more left in her!

Re: Big Tire Cars [Re: 1320Dart] #1686422
10/16/14 12:59 PM
10/16/14 12:59 PM
Joined: Aug 2013
Posts: 369
Indy
496 A-body Offline
enthusiast
496 A-body  Offline
enthusiast

Joined: Aug 2013
Posts: 369
Indy
Quote:

How did you know it wanted a smaller tire?




I'm guessing because the car is not mine but belongs to the father of a friend, but I'd say it seemed logical, a car that runs 10.40s combined with the minimal torque output of the 283 a 14x32 seems like overkill, his son also runs a 283 powered car in Super Stock and runs a 9x30 radial slick despite having a back halved car and class rules allowing a much bigger tire to be used. Leaves the line at 7k and still prefers the small tire.

Re: Big Tire Cars [Re: 496 A-body] #1686423
10/16/14 01:21 PM
10/16/14 01:21 PM
Joined: Mar 2010
Posts: 625
MD-USA
D
Dodgeguy101 Offline
mopar
Dodgeguy101  Offline
mopar
D

Joined: Mar 2010
Posts: 625
MD-USA
Quote:

Quote:

Ya,if its a 10 or 11 sec car,there's no need to run a 14 X 32 tire. In reality its probably slowing the car down.




Definitely, I know this SS/KA car shaved off considerable ET by simply going from a 14x32 radial slick to a 10.5x30 radial slick






This could be because he went to a smaller diameter tire. But, I would agree if the tire is lighter it will help.

Re: Big Tire Cars [Re: Dodgeguy101] #1686424
10/16/14 01:27 PM
10/16/14 01:27 PM
Joined: Jan 2003
Posts: 18,171
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 18,171
Las Vegas
Very much agreed that it depends on the application. If it is a bracket car I would say NO. If it is in the case of looking for every last little .01 then yes you can easily have WAY more tire than needed. But I don't think you are building a heads up car so IMO use what works best most consistently.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: Big Tire Cars [Re: Dodgeguy101] #1686425
10/16/14 01:29 PM
10/16/14 01:29 PM
Joined: Aug 2013
Posts: 369
Indy
496 A-body Offline
enthusiast
496 A-body  Offline
enthusiast

Joined: Aug 2013
Posts: 369
Indy




This could be because he went to a smaller diameter tire. But, I would agree if the tire is lighter it will help.




Good point about the diameter! Shortly after making the change in tire size he went from a dana 60 to a 12 bolt, not sure but he may have changed gear ratio to keep his RPMs where he wanted them.

Re: Big Tire Cars [Re: Al_Alguire] #1686426
10/16/14 02:15 PM
10/16/14 02:15 PM
Joined: May 2014
Posts: 503
Idaho
1320Dart Offline OP
mopar
1320Dart  Offline OP
mopar

Joined: May 2014
Posts: 503
Idaho
Quote:

Very much agreed that it depends on the application. If it is a bracket car I would say NO. If it is in the case of looking for every last little .01 then yes you can easily have WAY more tire than needed. But I don't think you are building a heads up car so IMO use what works best most consistently.




I guess I was wrong then.
I was arguing that there is such a thing as "too much tire" for a car.


Greg

-----------------------------------------------------------------
Cost is irrelevant, making memories is far more valuable!biggrin
Re: Big Tire Cars [Re: 1320Dart] #1686427
10/16/14 03:07 PM
10/16/14 03:07 PM
Joined: Oct 2006
Posts: 594
Mass.
8
80fbody Offline
mopar
80fbody  Offline
mopar
8

Joined: Oct 2006
Posts: 594
Mass.
larger tires simply weigh more and have more friction. Same basic reason to have skinny tires up front to reduce rotational mass and friction at the top end. My 2 cents on the subject.

Re: Big Tire Cars [Re: 80fbody] #1686428
10/16/14 03:48 PM
10/16/14 03:48 PM
Joined: Nov 2004
Posts: 6,890
North Alabama
M
Monte_Smith Offline
master
Monte_Smith  Offline
master
M

Joined: Nov 2004
Posts: 6,890
North Alabama
You only need enough contact patch to stick the supplied torque on a consistent basis. Anything beyond that is dead weight to pull. WAY too many guys put more tire on their cars than they need as a crutch for a poor working chassis.

Lots of bracket guys are among the "stick and go" persuasion......meaning put a big enough tire on there that you pretty much dead hook it, regardless of track conditions and never have to worry about wheel spin. That's fine if that is the route you want to go, but even at that, if a 14x32 will get the job done, a bigger tire won't help it hook any better and will only slow the car

Now where some of this goes completely out the window, is cars with a LOT of power. Many of these cars will NOT work with the tire dead hooked. They want to shake. In those instances there is definitely a such thing as too much tire

Monte

Re: Big Tire Cars [Re: Monte_Smith] #1686429
10/16/14 04:06 PM
10/16/14 04:06 PM
Joined: May 2014
Posts: 503
Idaho
1320Dart Offline OP
mopar
1320Dart  Offline OP
mopar

Joined: May 2014
Posts: 503
Idaho
Hi Monte-
This is what I was trying to argue.
Was what you said here:
"They want to shake. In those instances there is definitely a such thing as too much tire."
But I thought that blanket rule for all cars. So that's where I went wrong on my argument


Greg

-----------------------------------------------------------------
Cost is irrelevant, making memories is far more valuable!biggrin
Re: Big Tire Cars [Re: 1320Dart] #1686430
10/16/14 05:17 PM
10/16/14 05:17 PM
Joined: Nov 2004
Posts: 6,890
North Alabama
M
Monte_Smith Offline
master
Monte_Smith  Offline
master
M

Joined: Nov 2004
Posts: 6,890
North Alabama
Quote:

Hi Monte-
This is what I was trying to argue.
Was what you said here:
"They want to shake. In those instances there is definitely a such thing as too much tire."
But I thought that blanket rule for all cars. So that's where I went wrong on my argument


Nine times out of ten, if you are "shaking" the tire......you are underpowering the tire

Monte

Re: Big Tire Cars [Re: Monte_Smith] #1686431
10/16/14 06:49 PM
10/16/14 06:49 PM
Joined: May 2004
Posts: 11,698
Taxes & Virus's R-US, NY
Dragula Offline
I Live Here
Dragula  Offline
I Live Here

Joined: May 2004
Posts: 11,698
Taxes & Virus's R-US, NY
Yup...I have big tires....And I am slow....Oooh, and I won the Modified Gasser championship last year.

So if your a bracket racer, it may slow you down if they are bigger than you need, but the track is not always perfect either.

What I don't have to do is adjust the suspension for evey little track imperfection or changing conditions...I do make changes to it, but generally once its set-up, it hooks.

I drove a 600hp small tire car a couple years ago....Doing a Ssss down the track is not my idea of racing. Nor did I feel very safe staying in the throttle....


'70 Cuda,...605 Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

G3 Ported Edelbrock Hemi Heads ready to use for sale
Re: Big Tire Cars [Re: Eric] #1686432
10/16/14 06:52 PM
10/16/14 06:52 PM
Joined: Jan 2003
Posts: 5,872
communist bloc of new jersey
J
jamesc Offline
master
jamesc  Offline
master
J

Joined: Jan 2003
Posts: 5,872
communist bloc of new jersey
Quote:

Depends on what you are trying to do. I know some very successful bracket racers who run huge tires on relatively slow cars just for consistency.




the answer

Re: Big Tire Cars [Re: jamesc] #1686433
10/16/14 07:17 PM
10/16/14 07:17 PM
Joined: Oct 2011
Posts: 515
geezer acres rest home
D
dakotawilly Offline
mopar
dakotawilly  Offline
mopar
D

Joined: Oct 2011
Posts: 515
geezer acres rest home
easy formula,divide the tire width by your i.q. if the answer is less than 2 you should be racing the"short bus"and licking the windows as you pass the 60 ft mark......


SFI 25.5 depends,no leak,even at 213 mph....
Re: Big Tire Cars [Re: dakotawilly] #1686434
10/16/14 11:19 PM
10/16/14 11:19 PM
Joined: Mar 2006
Posts: 8,702
MI, usa
dvw Online content
master
dvw  Online Content
master

Joined: Mar 2006
Posts: 8,702
MI, usa
I bracket race my 9.20 foot brake car in pro and N/SS on a 10.5x29.5. It was in the winners circle 3 times this year, 2 semi-finals in 12 outings. Spin is not a problem.
Doug

Re: Big Tire Cars [Re: dakotawilly] #1686435
10/17/14 12:11 AM
10/17/14 12:11 AM
Joined: Jan 2005
Posts: 1,260
Las Vegas NV
moparmanjames Offline
pro stock
moparmanjames  Offline
pro stock

Joined: Jan 2005
Posts: 1,260
Las Vegas NV
Quote:

easy formula,divide the tire width by your i.q. if the answer is less than 2 you should be racing the"short bus"and licking the windows as you pass the 60 ft mark......




well everybody will be on the short bus with that formula unless we use millimeters for width.

Re: Big Tire Cars [Re: dakotawilly] #1686436
10/17/14 12:24 AM
10/17/14 12:24 AM
Joined: Jul 2007
Posts: 1,676
Philadelphia
R
radar Offline
top fuel
radar  Offline
top fuel
R

Joined: Jul 2007
Posts: 1,676
Philadelphia
Quote:

easy formula,divide the tire width by your i.q. if the answer is less than 2 you should be racing the"short bus"and licking the windows as you pass the 60 ft mark......




That doesn't make sense. Baseline: Average IQ is 100. Untubbed duster fits a 275 tire. So that gets you a 2.75- safely above window licker status. A super genius should be able to make a skinny tire hook by controlling the power delivery and instant center but his 150 IQ gets him a 1.83 score- his favorite color is 'clear'= window licker.

Page 1 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1