Re: Tire pressure with tubes?
[Re: tboomer]
#1060906
08/24/11 08:33 AM
08/24/11 08:33 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
We may go racing this weekend at Tri-State here in Iowa. I have not been out since I had tubes put in both rear slicks. The tires are M.T. 31x15x10.5ws..I was running 9 to 9.5 pounds without tubes. I assume that I should stay the same? Thanks!! Ted
Ted I would start out at the same pressure but with the tubes they will stiffen up the side walls... you'll need to play with the air to get your best launch... have fun... go fast
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Re: Tire pressure with tubes?
[Re: tboomer]
#1060908
08/24/11 08:49 AM
08/24/11 08:49 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
Thanks,Mike! I will try 9# to start..I will also leave the 3400 chip in for the brake. It is supposed to be a nice day Saturday. Sure would be nice to go a couple of rounds to get my confidence back!
Ted I found that on my car the lower the launch RPM was the higher I needed the tire pressure... high RPM = lower tire pressure... if I launch at low RPM with the tires at 7.0# it would cup the tires big time
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Re: Tire pressure with tubes?
[Re: moparacer]
#1060912
08/24/11 09:38 AM
08/24/11 09:38 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Quote:
People still run tubes?
I think I seen a actual tube that they used to install in tires at the Smithsonian once....
Makes my slicks last longer
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Re: Tire pressure with tubes?
[Re: moparacer]
#1060913
08/24/11 10:43 AM
08/24/11 10:43 AM
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Joined: Nov 2003
Posts: 3,438 Dandridge TN
Dabee
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Quote:
People still run tubes?
I think I seen a actual tube that they used to install in tires at the Smithsonian once....
Yep, some of us still do.
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Re: Tire pressure with tubes?
[Re: moparacer]
#1060914
08/24/11 11:56 AM
08/24/11 11:56 AM
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Joined: Jan 2003
Posts: 16,928 NC
440Jim
I Live Here
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I Live Here
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Quote:
People still run tubes?
I think I seen a actual tube that they used to install in tires at the Smithsonian once....
That is funny. But putting tubes in my slicks was the best thing I ever did for my application.
I was killing the side wall on my slicks around the 100 pass mark. Then I added inner tubes, changed from 12" wide rims to 14", and this allowed increasing tire pressure to 11 psi. Now I get over 200 passes (225 on the last set) on the slicks.
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Re: Tire pressure with tubes?
[Re: bumps440]
#1060917
08/24/11 05:46 PM
08/24/11 05:46 PM
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Joined: May 2004
Posts: 3,210 robin hood country
deaks
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I dont like to hijack but your car is very quick for an iron head 440, would you be willing to divulge the spec. You can pm me if you wish. Oh Ted, i run tubes as well. Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200# best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft best 60ft 1.36
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Re: Tire pressure with tubes?
[Re: deaks]
#1060918
08/24/11 05:52 PM
08/24/11 05:52 PM
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Joined: Jan 2003
Posts: 4,852 KENTUCKY
69CHARGERMD
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wow,,you guys run low tire pressures compared to what i am used to. I was running 14lb,,,,but dropped to 12 recently,,,maybe I need to experiment a bit more,,eg 11 like 440jim. never considered running less than 10,,does the car "wave" around at the high end of the track ? I run tubes in mine,,,fyi,
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Re: Tire pressure with tubes?
[Re: Crizila]
#1060921
08/24/11 08:32 PM
08/24/11 08:32 PM
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Joined: Jun 2005
Posts: 6,257 gulfport, ms, west mi
rowin4
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Some people would rather put air in between rounds, in the staging lanes and stop three times on the way home, I run new slicks till the side walls start to leak, then in goes the tubes.
it's ok to butt heads, just don't do it with a butthead
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Re: Tire pressure with tubes?
[Re: tboomer]
#1060923
08/24/11 10:09 PM
08/24/11 10:09 PM
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Joined: Jan 2003
Posts: 6,531 Jacksonville, FL
Chris2581
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Jacksonville, FL
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12.2x31.25 Phoenix with tubes...9.5-10lbs.
Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.
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Re: Tire pressure with tubes?
[Re: 69CHARGERMD]
#1060924
08/24/11 11:04 PM
08/24/11 11:04 PM
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Joined: Jan 2003
Posts: 16,928 NC
440Jim
I Live Here
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I Live Here
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Quote:
wow,,you guys run low tire pressures compared to what i am used to. I was running 14lb,,,,but dropped to 12 recently,,,maybe I need to experiment a bit more,,eg 11 like 440jim.
never considered running less than 10,,does the car "wave" around at the high end of the track ?
I run tubes in mine,,,fyi,
There are lots of factors for tire pressure. For example: Car weight (heavier = higher pressure) Tire size (smaller = higher pressure) Launch torque(higher = higher pressure) Chassis setup, rim width/tire width, weight distribution, weight transfer, instant center... (depends)
etc.
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