ET Drags with Tubes?
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- John_Heard
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When you think about it, how does the rotational force from the wheel transfer to the tube then back into the tire? just friction and most people put baby powder in them... All I can see that it would do is add a very small amount of stiffness in regards to compression forces. I really don't see how they can help that much. I've looked at pictures of sidewalls at launch on same weight cars, same ET's with and without tubes, they appear to distort the same..
Now if you glued the tube to the tire and rim somehow, then it makes sense you would pick up some amount of rotational stiffness due to the increased rubber cross section. Someone tell me how they add stiffness to the sidewall cause I can't picture it???
I can see where more rim screws or bead locks would make a difference in sidewall life...
Now if you glued the tube to the tire and rim somehow, then it makes sense you would pick up some amount of rotational stiffness due to the increased rubber cross section. Someone tell me how they add stiffness to the sidewall cause I can't picture it???
I can see where more rim screws or bead locks would make a difference in sidewall life...
My 1971 X275 Nova | Facebook
In a 10-11 second car, I'd run tubeless and save the weight. I never had to run tubes until running mid to low 9s.sc racing wrote:A lot of us dont run as fast as you guys so in your opinon do you think the tubes would help in slower cars that run in the 10's or 11's ?
Craig Watson
2QuickNovas Racing
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2QuickNovas Racing
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John,
I can't tell you how it does it. All i have to go off of is the fact that the tire lasts longer. I know exactly when the sidewalls are gone by my 60' times. My car is very consistant in the 1.28 to 1.30. When the sidewalls go it won't 60' any better than a 1.35. I have went through 10 sets of slicks with the tubes and I always get more passes than I did running without tubes. The only thing I can say is maybe it's more of a support for the sidewall than anything. It's kinda like having a sports bra for a set of double D's
MOOSE
I can't tell you how it does it. All i have to go off of is the fact that the tire lasts longer. I know exactly when the sidewalls are gone by my 60' times. My car is very consistant in the 1.28 to 1.30. When the sidewalls go it won't 60' any better than a 1.35. I have went through 10 sets of slicks with the tubes and I always get more passes than I did running without tubes. The only thing I can say is maybe it's more of a support for the sidewall than anything. It's kinda like having a sports bra for a set of double D's
MOOSE
- John_Heard
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I may have to reconsider my thoughts it if it helps the tires live longer. I would like to understand why though.
My 1971 X275 Nova | Facebook
I'm grasping at straws here, but could air pressure infiltrate the sidewalls of a slick without tubes and gradually weaken it?
With a tube, you only have the rubber of the tube pushing against the sidewall.
Not sure that holds water, but its something different to ponder.
With a tube, you only have the rubber of the tube pushing against the sidewall.
Not sure that holds water, but its something different to ponder.
Craig Watson
2QuickNovas Racing
5.23@131
Sponsors:
AEM Electronics
Carnivore Performance
Rapp Racing
VFN Fiberglass
Fast Shafts
2QuickNovas Racing
5.23@131
Sponsors:
AEM Electronics
Carnivore Performance
Rapp Racing
VFN Fiberglass
Fast Shafts
- jmarkaudio
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- hugger73hatch
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Re: ET Drags with Tubes?
Well I got a set of ET drags 28/9/15. Decided to try them without the tubes first. Have not made it to the track, but I will let everyone know as soon as I do, which will hopefully be this weekend.
73 Nova Hatchback, 408 Small Block 13-1, Iron Heads, 6.972 @ 98.362, 1.468 60', 3450 lbs, still tuning
28 x 9 Slick, N/A
http://www.esquireservices.net
28 x 9 Slick, N/A
http://www.esquireservices.net
Re: ET Drags with Tubes?
I don't profess to be real fast (6.60s 1/8th mile), but my Hoosier Slicks will hold air till the cows come home without tubes. Sitting over the winter they only dropped from 13 lbs to 10 lbs and sat from October till April. Every MT slick I've had will not do that without tubes. That being said I pull the same 60' times with Hoosiers without tubes as the MTs do with tubes. I've had SLIGHTLY better 60' times with MT slicks without tubes than Hoosiers without tubes. Just have to constantly add air to the Mickeys.
BTW, I've had way more sidewall life from the Hoosiers also. But I'm only 2900 lbs without driver (ME). Personally I don't care for the tubes, but I'm not making 1000+ HP in a 3400 lbs car either!!
BTW, I've had way more sidewall life from the Hoosiers also. But I'm only 2900 lbs without driver (ME). Personally I don't care for the tubes, but I'm not making 1000+ HP in a 3400 lbs car either!!
'87 S10 stock suspension, Caltracs, 9" rearend, 1.82 Glide, 383 SBC,
Brodix Track1 Heads, 14:1 compression, 180 shot plate,
2" tube Hussler Headers, 1.38 60ft., 6.20 ET 1/8th, 109 MPH,
Still Tuning, more to come.
Brodix Track1 Heads, 14:1 compression, 180 shot plate,
2" tube Hussler Headers, 1.38 60ft., 6.20 ET 1/8th, 109 MPH,
Still Tuning, more to come.
Re: ET Drags with Tubes?
Everybody has there own theory.......but i run tubes just as a safety issue and not having to pump them up with air every run or finding them flat in the morning.......but that is just me....i could care less if i loose 1/100 or 2/100 running a tube i just feel safer and one less thing to worry about
- hugger73hatch
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Re: ET Drags with Tubes?
Ok, finally made it back with the new tires. This is the first time I have had a set of "real" slicks. I feel it will probably take a few passes before they break in, but I may be wrong. I only got 2 passes, as I had a problem I had to fix.
60' went to a 1.55, and the car was still spinning some. I think it is unloading the suspension. I have one video from my first pass tonight when the car had a 1.64 and ran 11.97, spitting and popping like crazy (timing was way too high, not sure how that happened, but it did). I will ry to get that up to see what everyone thinks. Second pass numbers were as follows:
60' 1.5535
330' 4.6431
1/8 7.2514 @ 94.6
1/4 11.424 @ 117.65
Also the air was not very good tonight either. The water grains were 95 gpp. Last time to track car ran same et in a lot better air.
Just want to get some opinions on how long it may take to "break in" those et drags, or if it really doesn't take any time. Also was curious as to what air pressure most everyone is running in them.
60' went to a 1.55, and the car was still spinning some. I think it is unloading the suspension. I have one video from my first pass tonight when the car had a 1.64 and ran 11.97, spitting and popping like crazy (timing was way too high, not sure how that happened, but it did). I will ry to get that up to see what everyone thinks. Second pass numbers were as follows:
60' 1.5535
330' 4.6431
1/8 7.2514 @ 94.6
1/4 11.424 @ 117.65
Also the air was not very good tonight either. The water grains were 95 gpp. Last time to track car ran same et in a lot better air.
Just want to get some opinions on how long it may take to "break in" those et drags, or if it really doesn't take any time. Also was curious as to what air pressure most everyone is running in them.
73 Nova Hatchback, 408 Small Block 13-1, Iron Heads, 6.972 @ 98.362, 1.468 60', 3450 lbs, still tuning
28 x 9 Slick, N/A
http://www.esquireservices.net
28 x 9 Slick, N/A
http://www.esquireservices.net
Re: ET Drags with Tubes?
I never had to "break in " a slick, as far I know do your burnout and call it good. Air pressure will vary from car to car but you can look at the pattern on the tire and go from there.
Re: ET Drags with Tubes?
IM THINKING CAR WEIGHT AND SUSPENSION WILL DICTATE ANSWER...MY CAR GOING DOWN THE TRACK IS 3000 LBS TUBE CHASSIS 4 LINK DOOR CAR I RUN ET STREETS @ 9 LBS WENT MID 8S LAST SUMMER WITH NO PROBLEMS!!! NO TUBES!!!
Re: ET Drags with Tubes?
ok now this is strange i had more problems running with tubes then someone came up to me and said take those tubes out and let the tire do it's job (now this was years ago) so i did it that night and went back the next to finsh the weekend out and what a difference for me 11lbs of air and i didn't even have to worry about the burn out the car hooked and left so thats why i will never run tubes again. it really made a big differnce from spinning to hooking?? so maybe it is different from car to car who knows only way i can explain it.
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67 Camaro RS/SS
BBC Powerglide 4800 stall 4.11 29.5x10.5W
http://www.chpdragracing.com
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