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14x32 MT air pressure

Posted By: moparman1954

14x32 MT air pressure - 06/23/12 04:56 AM

Wondering what air pressure to start out at, new combo. 68 cuda, ladder bars, coil overs, glass hood, bumpers, lexan windows. 446 unported indy sr's, indy single plane, 950 proform carb, 607,610 comp solid cam, 12.5 wiseco pistons, 2" hooker fenderwells. 727 griner brake, 4500 lupo converter, delay box. 8 3/4, 5.13 gear, 14x32 MTs. 1/8 mile only
Posted By: MR_P_BODY

Re: 14x32 MT air pressure - 06/23/12 05:20 AM

Whats the car weigh... front and back (race weight)
Posted By: moparman1954

Re: 14x32 MT air pressure - 06/23/12 05:29 AM

Have no idea, never been scaled. The slicks have tubes and are screwed.
Posted By: rebel

Re: 14x32 MT air pressure - 06/23/12 05:43 AM

@2950lbs with me on board i run my 32x14S M/T's @ 8 psi. 1.32 60's 9.4@142mph 1/4's.

Attached picture 7261590-DSC06634.jpg
Posted By: Cab_Burge

Re: 14x32 MT air pressure - 06/23/12 06:00 AM

Quote:

Wondering what air pressure to start out at, new combo. 68 cuda, ladder bars, coil overs, glass hood, bumpers, lexan windows. 446 unported indy sr's, indy single plane, 950 proform carb, 607,610 comp solid cam, 12.5 wiseco pistons, 2" hooker fenderwells. 727 griner brake, 4500 lupo converter, delay box. 8 3/4, 5.13 gear, 14x32 MTs. 1/8 mile only


Tubes or tubeless? If tubeless I would probally start high, say nine lbs and see what the car does, feel the tires after the first pass to see if there rough all the way across or just in the middle If rough all the way across, it may take two or three passes to get it where you can feel it good with your fingertips lightly sliding across the tire The other thing is go by the time slip, pump it up until it spins and then go down in pressure until it slows down on the 60 ft. times, best 60 ft is the best air pressure
Posted By: Guitar Jones

Re: 14x32 MT air pressure - 06/23/12 11:54 AM

I run 7.5 - 8.5 in mine depending on track conditions.
Posted By: Jacob Pitt

Re: 14x32 MT air pressure - 06/23/12 01:53 PM

I run the 14.5/32 soft sidewall and don't run tubes. With a 3200lbs 9.40-50 car I run anywhere from 11-12 pounds depending on the track. M/T tires don't like to wrinkle excessively and like more air pressure. The more air pressure you can run the more stable to car will be on the top end.
Posted By: dennismopar73

Re: 14x32 MT air pressure - 06/23/12 02:06 PM

Quote:

I run the 14.5/32 soft sidewall and don't run tubes. With a 3200lbs 9.40-50 car I run anywhere from 11-12 pounds depending on the track. M/T tires don't like to wrinkle excessively and like more air pressure. The more air pressure you can run the more stable to car will be on the top end.





also not enough air will kill 60ft. and reaction times!
I could never run 7-9 #, car to unstable at the start, and wonder all over the place on the top end,
we run 12.5 in the coronet with hoosiers tubless, but we did have MT and ran the same pressure!
Posted By: 440Jim

Re: 14x32 MT air pressure - 06/23/12 02:08 PM

Weight is a big factor.
How hard the engine/converter/suspension hits the tires is a factor.
Rim width is a factor (12" uses less than 14")

A target range would be 9-11 psi for starters.
Posted By: dusturbd340W5

Re: 14x32 MT air pressure - 06/23/12 02:50 PM

my ladder bar car didn't like any thing less than 12# in M/T 14x32.
Posted By: moparacer

Re: 14x32 MT air pressure - 06/23/12 02:56 PM

I ran 10-11 in the stiff wall 32X14...
Posted By: Dragula

Re: 14x32 MT air pressure - 06/23/12 03:48 PM

Running 8.25-8.5 in ours at 2900lbs and 10.0 ET
Posted By: gj69charger

Re: 14x32 MT air pressure - 06/23/12 08:17 PM

I run between 10-11 in my 14.5x32. 3300lbs.
Posted By: 73-Dart-sport

Re: 14x32 MT air pressure - 06/23/12 09:58 PM

11 3/4 #'s in our 2850 lb car. Tires don't wrinkle much. We run the most air we can without the tires spinning.
Posted By: MR_P_BODY

Re: 14x32 MT air pressure - 06/23/12 10:28 PM

Quote:

Have no idea, never been scaled. The slicks have tubes and are screwed.




Without knowing the weight you can start out with the
suggestions the guys have given and play with it
from there... M/T tires do like a bit more air but
being that your running tubes it will be a bit less
but its still going to be a test and see
Posted By: Chris'sBarracuda

Re: 14x32 MT air pressure - 06/23/12 11:00 PM

Kind of like jetting..

Air them up till they spin, then back it off just a little..



Chris..
Posted By: rebel

Re: 14x32 MT air pressure - 06/23/12 11:36 PM

interesting some of the claims of running 10 psi n higher. my very first set of MT 32x14's i ran at 10 psi, i found that although i still had depth dots on the sides of the slick, i was starting to see the fabric in the middle of the slick. basicly they were over inflated & wearing out at 10 psi. once i started running a lower pressure i could see more even wear across the surface. i'm running the stiff sidewall as thats the only type my local MT agent brings in to our country so it might be different to the soft sidewall. even so at 8 or sometimes 7.5 psi, my car is very stable @ the top end.

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Posted By: dennismopar73

Re: 14x32 MT air pressure - 06/23/12 11:48 PM

Quote:

interesting some of the claims of running 10 psi n higher. my very first set of MT 32x14's i ran at 10 psi, i found that although i still had depth dots on the sides of the slick, i was starting to see the fabric in the middle of the slick. basicly they were over inflated & wearing out at 10 psi. once i started running a lower pressure i could see more even wear across the surface. i'm running the stiff sidewall as thats the only type my local MT agent brings in to our country so it might be different to the soft sidewall. even so at 8 or sometimes 7.5 psi, my car is very stable @ the top end.




Rim size,is most likely the issue, to big of burn outs! jmo,
I have a 14" but wish I had a 15" with my 14 32 w
Posted By: rebel

Re: 14x32 MT air pressure - 06/24/12 01:31 AM

Quote:

Quote:

interesting some of the claims of running 10 psi n higher. my very first set of MT 32x14's i ran at 10 psi, i found that although i still had depth dots on the sides of the slick, i was starting to see the fabric in the middle of the slick. basicly they were over inflated & wearing out at 10 psi. once i started running a lower pressure i could see more even wear across the surface. i'm running the stiff sidewall as thats the only type my local MT agent brings in to our country so it might be different to the soft sidewall. even so at 8 or sometimes 7.5 psi, my car is very stable @ the top end.




Rim size,is most likely the issue, to big of burn outs! jmo,
I have a 14" but wish I had a 15" with my 14 32 w




true that. 15" rims here & tend to be somewhat conservative on the burnout,

Attached picture 7262556-545747_365733213472298_262223987156555_1058923_598059961_n.jpg
Posted By: dusturbd340W5

Re: 14x32 MT air pressure - 06/24/12 10:01 PM

Quote:

Quote:

Quote:

interesting some of the claims of running 10 psi n higher. my very first set of MT 32x14's i ran at 10 psi, i found that although i still had depth dots on the sides of the slick, i was starting to see the fabric in the middle of the slick. basicly they were over inflated & wearing out at 10 psi. once i started running a lower pressure i could see more even wear across the surface. i'm running the stiff sidewall as thats the only type my local MT agent brings in to our country so it might be different to the soft sidewall. even so at 8 or sometimes 7.5 psi, my car is very stable @ the top end.




Rim size,is most likely the issue, to big of burn outs! jmo,
I have a 14" but wish I had a 15" with my 14 32 w




true that. 15" rims here & tend to be somewhat conservative on the burnout,




My car was a ladder bar car 14x32x15 on a 14" wide rim at 10# of air the car hit the tire hard enough that it would crush the tire and the rim would be all but on the pavement and it would get a little wobbly on the big end.
with 12# of air all that went away and slicks wore very flat and even.
That was leaving on a brake at 5800.
Posted By: dartman366

Re: 14x32 MT air pressure - 06/24/12 11:18 PM

Quote:

Kind of like jetting..

Air them up till they spin, then back it off just a little..



Chris..


Thats exactly what a fellow that worked for M/T as a designer told me to do, even with my Phoenix slicks.
Posted By: dusturbd340W5

Re: 14x32 MT air pressure - 06/25/12 01:32 AM

Quote:

Quote:

Kind of like jetting..

Air them up till they spin, then back it off just a little..



Chris..


Thats exactly what a fellow that worked for M/T as a designer told me to do, even with my Phoenix slicks.




thats the best way to go,the more air you run the easier the tire turns also.
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