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Tire Question for the PSMCD racers

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  • Pat Dilling
    replied
    Well, had a fun evening at Sacramento Raceway. A new personal best of 13.57. Only got to make 4 passes, they were all in the 13s. My consistency has improved with 60' times all between 2.23 and 2.28. The traction bars have helped with that I am sure. If I could cut that by a tenth I think it would make a huge difference in the ET. Your input on the tire pressure was very helpful. I set it at 25 pounds, in the past I have been running 20-22 lbs and I now know I don't need to go that low. The Studebaker got a lot of attention and won on 3 of 4 passes. Thanks again for the advice.
    Attached Files

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  • studegary
    replied
    Those Bucrons were very sticky and wore out very fast.
    If you found some old ones now, they would neither be safe nor sticky.
    The service station/garage owner in one place that I worked had them on his DeSoto. They worked great. One night he left his car at the station. During the night, someone jacked up the side of the car away from the street and stole two wheels and Bucrons. This same owner looked me up and called me to chat recently (after five decades). We remembered a lot of things from his three stations, but the Bucrons did not come up in the conversation in that call.

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  • Pat Dilling
    replied
    Originally posted by BobPalma View Post
    Similar, George, but not as good. I remember handling both Butylaires and Bucrons "back in the day" in the service station business. The Bucrons were a bit softer, and likely stickier.

    62champ: If someone wanted to run Bucrons or Butylaires at The Pure Stock Drags, they probably could. But they'd have to find two more tires of the identical size to run on the front wheels. They wouldn't have to be Bucrons or Butylaires up front, but if they were running 7.10X15 Bucrons or Butylaires on the rear, they'd have to run 7.10X15s of some other [probably] reproduction brand on the front. BP
    If you could find them, I would be very nervous running a 40+ year old tire at 100 mph

    Thanks again everyone for your input.

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  • BobPalma
    replied
    Originally posted by R3 challenger View Post
    Good thought on the Bucrons. The R2 Super Lark tested in the December, 1963, Motor Trend had 6.70 X 15 Firestone Butylaires. It posted a very good (for the time) 0-30 time of 2.9 seconds. Anyone know if those were similar to the Atlas tire? George
    Similar, George, but not as good. I remember handling both Butylaires and Bucrons "back in the day" in the service station business. The Bucrons were a bit softer, and likely stickier.

    62champ: If someone wanted to run Bucrons or Butylaires at The Pure Stock Drags, they probably could. But they'd have to find two more tires of the identical size to run on the front wheels. They wouldn't have to be Bucrons or Butylaires up front, but if they were running 7.10X15 Bucrons or Butylaires on the rear, they'd have to run 7.10X15s of some other [probably] reproduction brand on the front. BP

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  • Corvanti
    replied
    just in case anyone is interested:

    http://www.tirerack.com/tires/tires....omCompare1=yes

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  • R3 challenger
    replied
    Good thought on the Bucrons. The R2 Super Lark tested in the December, 1963, Motor Trend had 6.70 X 15 Firestone Butylaires. It posted a very good (for the time) 0-30 time of 2.9 seconds. Anyone know if those were similar to the Atlas tire?

    George

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  • sweetolbob
    replied
    Originally posted by 62champ View Post
    I wonder if someone had a vintage pair of Atlas Bucron(sp?) tires they would allow them.

    When my dad and uncle were racing their '51 starlight in the late 1960's that was about the only tire they would use in the rear. My dad said they got great traction but the compound was such that they would not make any sound when they were slipping...
    That's what we ran on our 55 Chebby drag car in the 60's but I'll bet the aforementioned, Michelin X ICE radials, will be every bit as good.

    Bob

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  • 62champ
    replied
    I wonder if someone had a vintage pair of Atlas Bucron(sp?) tires they would allow them.

    When my dad and uncle were racing their '51 starlight in the late 1960's that was about the only tire they would use in the rear. My dad said they got great traction but the compound was such that they would not make any sound when they were slipping...

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  • studegary
    replied
    Thanks for the complete response, George. See you in SB.
    Like the old saying; "It is better to break traction than to break parts." or "If I have to break something, I hope that it is traction."

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  • R3 challenger
    replied
    Gary, the PSMCDR tire rules read as follows: "Reproduction tires or radial tires only. No soft compound tires of any kind allowed. Retread tires are not allowed. Use of traction compounds or rubber softening chemicals on tires is strictly prohibited. Suspicious tires will be durometered." About tire sizes, they will not allow Studebakers to use 60-series tires because that size did not exist when Studes were new. They do allow G-70 or equivalent. And "all four tires (and wheels) must be the same size." Safety probably enters into their decisions.

    The Wrapper has Firestone Firehawk Indy 500 radials; size is 235/70/15. Front and rear tires do not have to be the same manufacturer, but they must have the same size on the sidewall.

    Years ago, I spotted one car (not a Studebaker) with retreads. That situation caused the organizers to ban retreads, thus preventing a very soft tread from being installed on a standard street tire casing.

    I have kept all of the hundreds of time slips for the Wrapper, and a couple of years ago, I calculated the average 60 foot time for the reproduction F-70/G-70 Firestone bias-ply tires. The average 60' for the Firestone Indy 500 radials is almost exactly the same. We run about 25 lbs.

    Using street tires for drag racing is kind of like having a fuse in an electrical circuit...you don't break as many stock parts when the tires spin.

    Hope this helps.

    George
    Last edited by R3 challenger; 05-21-2012, 01:01 PM.

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  • studegary
    replied
    I believe that the PS in PSMCD stands for pure stock. If the cars are supposed to be pure stock, how can any Studebaker run with radial tires?

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  • studebaker-R2-4-me
    replied
    Originally posted by KOOL R2 View Post
    I am running Michelin 215X70X15 Radials with 40lbs in the fronts ( to lessen rolling resistance) and 32lbs in the rear tires for traction. I recently switched to Michelin X ICE radials which provide better traction.
    I'll bet those X Ice radials will be had to find in California! Peter's Avanti hooks up really well those tires.

    Allen

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  • KOOL R2
    replied
    I am running Michelin 215X70X15 Radials with 40lbs in the fronts ( to lessen rolling resistance) and 32lbs in the rear tires for traction. I recently switched to Michelin X ICE radials which provide better traction.

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  • Pat Dilling
    replied
    Input from successful racers as Ted and Richard really helps. Even if the bias ply do work for some like 2R5 said, I don't plan to switch, just want to figure the best way to run my everyday radials on my very occasional trips to the track. I have watched the videos of you guys and see that you just do short dry burn out then stage and go. In the past I have not done the dry burn out, but will give that a try. We have some nice cool weather this week and I am planning to hit the Wednesday night street drags at Sacramento Raceway.

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  • 63larkr1
    replied
    As with Ted I run radial Firestone 500s with 26lbs of air. As 2R5 said a lot of brand X racers run bias and have some great 60' times with them. And as Ted said they put a lot of air in them and get them good and hot. I didn't have good luck with them.
    Richard

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