|
Re: Tire pressure with tubes?
[Re: tboomer]
#1060906
08/24/11 08:33 AM
08/24/11 08:33 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
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
|
|
|
Re: Tire pressure with tubes?
[Re: tboomer]
#1060908
08/24/11 08:49 AM
08/24/11 08:49 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
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
|
|
|
Re: Tire pressure with tubes?
[Re: moparacer]
#1060912
08/24/11 09:38 AM
08/24/11 09:38 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
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
|
|
|
Re: Tire pressure with tubes?
[Re: moparacer]
#1060913
08/24/11 10:43 AM
08/24/11 10:43 AM
|
Joined: Nov 2003
Posts: 3,426
Dandridge TN
Dabee
master
|
master
Joined: Nov 2003
Posts: 3,426
Dandridge TN
|
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.
|
|
|
Re: Tire pressure with tubes?
[Re: moparacer]
#1060914
08/24/11 11:56 AM
08/24/11 11:56 AM
|
Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 16,923
NC
|
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.
|
|
|
Re: Tire pressure with tubes?
[Re: bumps440]
#1060917
08/24/11 05:46 PM
08/24/11 05:46 PM
|
Joined: May 2004
Posts: 3,210
robin hood country
deaks
master
|
master
Joined: May 2004
Posts: 3,210
robin hood country
|
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
|
|
|
Re: Tire pressure with tubes?
[Re: deaks]
#1060918
08/24/11 05:52 PM
08/24/11 05:52 PM
|
Joined: Jan 2003
Posts: 4,852
KENTUCKY
69CHARGERMD
master
|
master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
|
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,
|
|
|
Re: Tire pressure with tubes?
[Re: Crizila]
#1060921
08/24/11 08:32 PM
08/24/11 08:32 PM
|
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
master
|
master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
|
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
|
|
|
Re: Tire pressure with tubes?
[Re: tboomer]
#1060923
08/24/11 10:09 PM
08/24/11 10:09 PM
|
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581
master
|
master
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
|
12.2x31.25 Phoenix with tubes...9.5-10lbs.
Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
|
|
|
Re: Tire pressure with tubes?
[Re: 69CHARGERMD]
#1060924
08/24/11 11:04 PM
08/24/11 11:04 PM
|
Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 16,923
NC
|
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.
|
|
|
Re: Tire pressure with tubes?
[Re: 440Jim]
#1060925
08/24/11 11:15 PM
08/24/11 11:15 PM
|
Joined: Jun 2009
Posts: 644
Minnesota
Barnstorm
mopar
|
mopar
Joined: Jun 2009
Posts: 644
Minnesota
|
14x32 Phoenix here..10 1/2lbs works best usually. Car wads the tire up on launch and gets wiggly after the 1/8 at 9-9 1/2lbs. 3420 weight.
The little old lady from Pasadena is back!
|
|
|
|
|
![6793768-998852905_4DmMz-O[640x480].jpg](/ubbthreads/ubbthreads.php/ubb/download/Number/110338/filename/6793768-998852905_4DmMz-O[640x480].jpg){kind=link}