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Anyone run M/T 10.5 stiff sidewall slicks?
Posted By: 408strokerdart
Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 12:44 PM
I am running the 29.5 X 10.5 M/T slicks with stiff sidewalls and was wondering what air pressure has been working for others. I know all cars like different air pressures, but just looking for a ball park figure.
I will have to say that they are very stable at speed and don't have any of the side to side "rolling" characteristics that I remember with regular slicks.
Posted By: Rodney
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 12:56 PM
I started @ 8.5 and moved up to 10 psi with our 14 inch wide 32's on the 3500 lb ladder bar car.
Also only a few second burn out.
shock adjustment neg. all the way up front and positive all the way in the rear.
The car lifts the front wheels about 6 inches when hooking good.
great tire for a heavy car IMO.
Posted By: 408strokerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 01:20 PM
I started at 14psi and only got down to 12 1/2, but couldn't get a read if it liked the change or not since I also made a shock adjustment. I really just want to know if I am in the ballpark at 12 1/2 or could it like less? They still "look" like they have alot of air in them for slicks, but I don't have any experience with the stiff sidewall tires.
Posted By: JERICOGTX
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 01:30 PM
I run between 12.5 and 14 depending on track conditions. How much you run will also depend on the width of the rim. I run 12" rims.
Jeff
Posted By: 408strokerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 02:02 PM
Quote:
I run between 12.5 and 14 depending on track conditions. How much you run will also depend on the width of the rim. I run 12" rims.
Jeff
10" wheels here.
Posted By: Jacob Pitt
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 02:21 PM
Here is air pressure chart from M/T's website
ET DRAG® AND ET STREET™
VEHICLE WEIGHT
TIRE SIZE
AIR PRESSURE
UNDER 2,500 POUNDS UNDER 30" DIAMETER 6 P.S.I. AND UP
UNDER 2,500 POUNDS OVER 30" DIAMETER 4 P.S.I. AND UP
2,500 TO 3,000 POUNDS UNDER 30" DIAMETER 8 P.S.I. AND UP
2,500 TO 3,000 POUNDS OVER 30" DIAMETER 6 P.S.I. AND UP
OVER 3,000 POUNDS UNDER 30" DIAMETER 16 P.S.I. AND UP
OVER 3,000 POUNDS OVER 30" DIAMETER 10 P.S.I. AND UP
Posted By: 408strokerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 02:31 PM
Quote:
Here is air pressure chart from M/T's website
ET DRAG® AND ET STREET™
VEHICLE WEIGHT
TIRE SIZE
AIR PRESSURE
UNDER 2,500 POUNDS UNDER 30" DIAMETER 6 P.S.I. AND UP
UNDER 2,500 POUNDS OVER 30" DIAMETER 4 P.S.I. AND UP
2,500 TO 3,000 POUNDS UNDER 30" DIAMETER 8 P.S.I. AND UP
2,500 TO 3,000 POUNDS OVER 30" DIAMETER 6 P.S.I. AND UP
OVER 3,000 POUNDS UNDER 30" DIAMETER 16 P.S.I. AND UP
OVER 3,000 POUNDS OVER 30" DIAMETER 10 P.S.I. AND UP
I have never seen this chart before so thanks for posting. I wonder why such a big spread from 2500-3000 and 3000+? It is double. I understand it is just for reference though.
Posted By: bdaz smblk
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 02:47 PM
My car is 3,120 and with a 11inch wheel with the 29.5x10.5s I found 10 1/4 pounds works best.Kenny
Posted By: 408strokerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 03:05 PM
Quote:
My car is 3,120 and with a 11inch wheel with the 29.5x10.5s I found 10 1/4 pounds works best.Kenny
I would guess our cars are similar in weight and front/rear bias. I was thinking that I may still be able to go down on pressure....looks like there is room to try less. Thanks Kenny.
Posted By: hemiiroc
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 03:10 PM
I have been running those tires for several years on several different cars. Usually run between 11-12 lbs.
Posted By: JERICOGTX
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 04:17 PM
Quote:
Quote:
My car is 3,120 and with a 11inch wheel with the 29.5x10.5s I found 10 1/4 pounds works best.Kenny
I would guess our cars are similar in weight and front/rear bias. I was thinking that I may still be able to go down on pressure....looks like there is room to try less. Thanks Kenny.
Why would you want to try less??? 
Make a shock adjustment at higher pressure first. When I asked Monte Smith about going up in air pressure, his answer was simple "Ever try pushing a car with flat tires?"
Jeff
Posted By: FASTFISH420
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 04:22 PM
I run 11 to 11.5 in mine at 3060 pounds..
Posted By: Cab_Burge
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 04:39 PM
Those tires are intended to be ran on high HP cars that run in the sevens and faster, try letting them down until the car slows down and then go back up a 1/2 to 1.5 lbs more air pressure. Not all tire gauges read the same also so your gauge may be off compared to other gauges used by members on here
Posted By: 408strokerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 05:45 PM
Quote:
Those tires are intended to be ran on high HP cars that run in the sevens and faster, try letting them down until the car slows down and then go back up a 1/2 to 1.5 lbs more air pressure. Not all tire gauges read the same also so your gauge may be off compared to other gauges used by members on here
Good points. I will eventually get different tires, but had plans of more chassis and more engine. This is the same tire that the texastrueten5 "extreme" clas runs. Most of those cars are going 5.1x in the 1/8th mile.
Posted By: Rodney
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 05:59 PM
When I called Micky and talked with tech he recommended the stiff side wall for our 9.90 sec car? I like 'em
FAQ on stiff sidewall tire 
Posted By: MoparforLife
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/25/09 06:27 PM
I run 13 - 15 depending on the track. 10 inch rim - 3000 lbs race weight.
Posted By: Anonymous
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/26/09 12:05 AM
heres what 11 lbs looks like with a 31. x 10.5w x15 stiff sidewall.
Posted By: gearjammerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 01:55 AM
I run a 28x10.5 stiff sidewall MT and run 11psi at 3270lbs
Donald
Posted By: 340RICK
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 02:53 AM
I run the same tire Brian
I tried 12 then 12.5 then 13 settled on 13.5
My tire looked like SSracers at anything less than 13.5. Mickey Tire rep was at classic and told me to stay at 13-14 psi
We looked at track photo guys pics and my tire was wadded up bad when PSI was in the 12's
Take a look at the track photo guys starting line shots. The guy even zoomed in on tire you can get a good idea from his pictures what the car is doing.
Posted By: 408strokerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 03:05 AM
Quote:
I run the same tire Brian
I tried 12 then 12.5 then 13 settled on 13.5
My tire looked like SSracers at anything less than 13.5. Mickey Tire rep was at classic and told me to stay at 13-14 psi
We looked at track photo guys pics and my tire was wadded up bad when PSI was in the 12's
Take a look at the track photo guys starting line shots. The guy even zoomed in on tire you can get a good idea from his pictures what the car is doing.
From the initial hits, it seemed to like about 13 lbs. Going back out tomorrow night to test some more. Vac pump hooked up, oil changed, air shifter connected, shifter adjusted to 8000 RPM, 2 step turned up to 6000, 1/4 more turn preload on pass side caltrac bar, 2 more jet sizes all 4 corners.....should make for an interesting night!
Posted By: bigtimeauto
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 11:27 AM
11bs here on 12" wide wheels.1.25 60
Posted By: Tig
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 12:11 PM
We've recently changed over to stiff sidewalls. Only did 3 passes before hurting the motor but I can tell the car did not like 11.5 psi in them (on my gauge). Car squirmed around a lot from the startline. We started @ 12.5 and went down. Next time out we'll start there and go up, tyre was wadding pretty bad in hindsight. Got a 1.41 60ft but track wasn't there, so everyone was saying, so it sorta equalled the non stiff wall slicks given the conditions. I think the normal slicks are a bit more forgiving when it comes to pressure.
We still run ours with tubes too, is this right?
Posted By: Rodney
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 12:18 PM
I run Tubes in ours they are recommended by the manufacturer.
sounds like you need more air pressure.
does your rim width match the tire width?
Posted By: Tig
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 12:34 PM
This is a pic of a 9.81 @ 138, 1.41 60ft run. Tyres are @ 12.0 psi. Rim is 10 inch.
Posted By: MR_P_BODY
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 06/27/09 12:46 PM
You should always run as much air pressure as you can
without spinning.... gives you better MPH
Posted By: racerx
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/13/14 11:55 PM
Did a google search on this topic
and this thread came up I know this old but instead of starting an new one thought I'll give this a
interesting replies here fellas...........
Posted By: WHITEDART
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 02:28 AM
i run a m/t 29.5 10.5 S wall 12.5 psi warm. 3950lb 68 dart.i think i picked up about 3or4 hun with the stiff wall. and yes i run tubes.i was buying two sets a year.and replace in them at about 75 to 90 passes.
Posted By: fishy340
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 03:53 AM
Bye far the most popular tire on the east coast 12.5 psi.Brian one day try the MT pro radial and become one of the men that all smile at how smooth it feels and the tenth they all pick up
Posted By: a493demon
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 04:08 AM
i run 28x10.5'a stiff with a 12in. wheel no tube's at 14.5 lbs.
Posted By: Thumperdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 06:19 AM
I`ve got those on my car now and although I havn`t hit the track or street raced yet, they sure try to hook on the street rollin along and sabbin it in second which is better than the QTP`s. I know that doesn`t help but they are sticky AND stable driving around on the street........
Posted By: racerx
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 12:18 PM
If all possible can you guys give the spec.(60',et.,tire pre.)
The reason I'm asking is my car has been as fast as 140.93 mph with a best et. of 9.56,with a 1.38 60'(with the stiff sidewall tire)
looking at Wallace cal. that mph. should be 9.40's it has been a best of 1.28(but that was with a
w-tire@9.5lbs)it seems to be dropping off at the 330' on
.............Thaxs fellas
Posted By: 408strokerdart
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 02:26 PM
Quote:
If all possible can you guys give the spec.(60',et.,tire pre.)
The reason I'm asking is my car has been as fast as 140.93 mph with a best et. of 9.56,with a 1.38 60'(with the stiff sidewall tire) looking at Wallace cal. that mph. should be 9.40's it has been a best of 1.28(but that was with a [Email]w-tire@9.5lbs)it[/Email] seems to be dropping off at the 330' on .............Thaxs fellas
If it is dropping off from the 330' on I would look somewhere other than the tires. 
Posted By: Adobedude
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 02:43 PM
I put 10,5 Hoosier stiff walls on my Dakota this year. It hates them, nothing I can do will make them work. Truck weighs 3400 with me in it, but 500 lbs heavier on the nose than the rear.
I've battled them for the last weekend, they are coming off tomorrow in favor of the regular side wall Hoosiers. My 60' is down, my ET is down but I sure love the way they launch, I just can't make a full pass on them, the rear end starts to skate around going down the track, but our track has some serious issues too.
Posted By: MR_P_BODY
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 02:52 PM
Quote:
Quote:
If all possible can you guys give the spec.(60',et.,tire pre.)
The reason I'm asking is my car has been as fast as 140.93 mph with a best et. of 9.56,with a 1.38 60'(with the stiff sidewall tire) looking at Wallace cal. that mph. should be 9.40's it has been a best of 1.28(but that was with a [Email]w-tire@9.5lbs)it[/Email] seems to be dropping off at the 330' on .............Thaxs fellas
If it is dropping off from the 330' on I would look somewhere other than the tires.
... could be over reving the engine on the
top end.. if you put on a taller tire might do it or
a gear change... this is just a guess if you are over
reving... I know I am a little.. I run a best 60' of
1.19 but the normal is a 1.21 and 8.96 at 152 best but
normal is 9.01 at 150... I know my cam is way short
on lift
Posted By: Triple Threat
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 04:15 PM
12.5-13.5 for me with the 3062W, shares the same sidewall. No more radials on yours?
Posted By: Monte_Smith
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/14/14 05:52 PM
We normally run 315 radials, but when we DO run slicks, we run the tire the OP is asking about. Our car race ready is about 2800lbs on slicks. They are mounted on beadlocked 12" wheels and we DO run tubes. We normally run them at 12-13 psi at that weight. A heavier car will need more or it will absolutely CRUSH the sidewall at the hit
Remember....MORE air, puts MORE rubber on the ground because it flattens the tire out and stiffens up the sidewall. Low air, lets the tire "cup" in the middle and has less rubber on the ground.
We have been 1.09 in 60ft on this tire and 4.30s in the 1/8th at 173+
A high hp car that hooks hard and crushes the sidewall will beat the sidewalls out in short order. Our slicks are DONE for us in 12 passes, but would still be fine for lower hp stuff.
Monte
Posted By: 1967dartgt
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 12:53 AM
Quote:
12.5-13.5 for me with the 3062W, shares the same sidewall. No more radials on yours?
This post is from 2009 and do believe he runs radial slicks now.
Posted By: 1967dartgt
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 12:55 AM
Quote:
We normally run 315 radials, but when we DO run slicks, we run the tire the OP is asking about. Our car race ready is about 2800lbs on slicks. They are mounted on beadlocked 12" wheels and we DO run tubes. We normally run them at 12-13 psi at that weight. A heavier car will need more or it will absolutely CRUSH the sidewall at the hit
Remember....MORE air, puts MORE rubber on the ground because it flattens the tire out and stiffens up the sidewall. Low air, lets the tire "cup" in the middle and has less rubber on the ground.
We have been 1.09 in 60ft on this tire and 4.30s in the 1/8th at 173+
A high hp car that hooks hard and crushes the sidewall will beat the sidewalls out in short order. Our slicks are DONE for us in 12 passes, but would still be fine for lower hp stuff.
Monte
How many runs do you get out of a radial?
Posted By: Monte_Smith
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 01:06 AM
Until they are slick and I just feel like we need new ones........LOL!!! Ones on the car now probably have 40 or 50 licks. Even on the radials, we usually beat the sidewall out before the tread is done. We are light on burnouts. Killing the tire on the burnout does you NO GOOD. With the car just sitting there, slicks or radials and I can see lines in the sidewall where they have been wrinkling......off they come.
Monte
Posted By: 1967dartgt
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 01:07 AM
Wow you have any experience with the pro's?
Posted By: avenger572
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 01:42 AM
I am running the pro radials this year. Have around 30 passes on them ,they have been real good so far . Best 60ft is 1.21 and 9.21 at 148 so far . Not sue how many passes i will get ,seems to be wearing a little fast .
Posted By: racerx
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 12:06 PM
Quote:
I am running the pro radials this year. Have around 30 passes on them ,they have been real good so far . Best 60ft is 1.21 and 9.21 at 148 so far . Not sue how many passes i will get ,seems to be wearing a little fast .
When you made the change from slicks to radial were there any other changes made?
Posted By: Al_Alguire
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 05:10 PM
We ran that tire in Hot Street, it was the mandatory tire for the class. The Cuda weighed between 3350-70. It was a 12" beadlocked wheel with and without tubes. This was at 11lbs no tubes and you can see how it was killing the tire. We never had a lot of luck with MORE pressure. Generally we ended up between 10.2-11.2lbs of pressure. These things might last two races at most on this car. But the kept working great on lower HP stuff.
Posted By: Al_Alguire
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 05:11 PM
Here is one with tubes at the 10.4lbs. Wheelspeed was always an issue for us. It was a fine line between the car working and not. We killed a lot timing to get the car moving. We generally opted for the kill the tire and make sure it goes down track method. The car was not it's fastest this way but it always got down the track. Typically in the low to mid 1.20's this way.
Posted By: Monte_Smith
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 06:45 PM
Most guys use up the tread on their tires in the burnout box by just killing the tire in the water. This is a waste of rubber and actually does more harm than good. The ideal tire temp is generally within 10 degrees of track temp. And the tire being CLEAN is actually MORE important than the temp............Think back to how many times you have seen cars at the track, some really HIGH HP cars have a problem and either NOT get a burnout, or just a light one. They STILL generally go right down the track. Guys that tell you that their car "won't hook" unless they just boil the tires have no clue about what their car REALLY needs to work, because setting the tire on fire and getting the rubber really hot and squishy is NOT the answer to making a car hook.
With our car, we do LONG burnouts, but we do not do HARD burnouts. How is that possible?........Easy, we do a "rolling burnout" like a fuel car. He rolls through the puddle, I tell him when to strike the tire, he mats it and puts it in high gear and I also tell him when to let off. We make a LOT of wheelspeed fast and don't cook the tire. I do NOT want him to burn across the line with radials, as they can tear up the rubber on the line.......BUT, I DO want him to "roll" across the line out to about 60ft with the hot clean tires to leave some tracks. If I need MORE heat, I roll him through the puddle slow, if it is hot outside I move him through the puddle fast. Again, we do NOT cook the tire or even make a whole lot of smoke. That is just wasting the tire for no reason.
Monte
Posted By: MR_P_BODY
Re: Anyone run M/T 10.5 stiff sidewall slicks? - 07/15/14 06:57 PM
Yeah I've seen funny cars make a clean pass even without
a burn out at all.. they just spun them a little to
clean them and get the water off them.. I do very
little burn out as per the manufacturer instructions
