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Tires bounce in burnout #2788999
06/24/20 09:58 PM
06/24/20 09:58 PM
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On the parachute mount
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n20mstr Offline OP
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Tires bounce in burnout and vibration before finish line .

Tire balance or driveshaft/u-joints?

Hoosier radials they are balanced and take a lot of weight
Driveshaft is Denny’s nitrous ready , been in car 10 years . Approx 500 passes and who knows street miles


....BAD A$$ STREET CAR.....
Re: Tires bounce in burnout [Re: n20mstr] #2789033
06/24/20 11:30 PM
06/24/20 11:30 PM
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s. e. pa.
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calrobb2000 Offline
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hi

look close at tires for a build up of rubber and traction compound .

i may only be on 1 tire .

air psi also must be correct , higher is best for top end .

Re: Tires bounce in burnout [Re: calrobb2000] #2789036
06/24/20 11:40 PM
06/24/20 11:40 PM
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Denver, CO
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BigBlockGTS Offline
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n20mstr- I suspect you have forgotten more than me but I spoke with a real good local driveline shop recently that did drag racing stuff- He said driveshafts do wear out. I don't know your power level but 500 passes is a decent number and it could be that it twisted and is now out of balance.

Re: Tires bounce in burnout [Re: n20mstr] #2789078
06/25/20 08:10 AM
06/25/20 08:10 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
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Tony, I'd be leaning more towards it being a tire issue. I've twisted driveshafts in the past and only had a vibration through 1st and 2nd gear...not noticeable anywhere else. Once in high gear, it smoothed right out. Had this happen twice.
Last year I had a slight vibration in 2nd gear only...turned out to be wear in the U joints. New U joints and it's smooth as silk again.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Tires bounce in burnout [Re: BigBlockGTS] #2789083
06/25/20 08:17 AM
06/25/20 08:17 AM
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n20mstr Offline OP
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Originally Posted by BigBlockGTS
n20mstr- I suspect you have forgotten more than me but I spoke with a real good local driveline shop recently that did drag racing stuff- He said driveshafts do wear out. I don't know your power level but 500 passes is a decent number and it could be that it twisted and is now out of balance.


Its a small block duster street car . 400+ ? Hp . Runs 11 teens at 120. I think It’s the tires. I also think the driveshaft needs maintenance. It’s been in the car for ten years . He races multiple classes most times and like I said it’s got well over 500 passes on it most of them 11.50 to 11 teens . It’s a 3200lb street car . It’s got some street miles on it also .


....BAD A$$ STREET CAR.....
Re: Tires bounce in burnout [Re: an8sec70cuda] #2789085
06/25/20 08:21 AM
06/25/20 08:21 AM
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On the parachute mount
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n20mstr Offline OP
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Originally Posted by an8sec70cuda
Tony, I'd be leaning more towards it being a tire issue. I've twisted driveshafts in the past and only had a vibration through 1st and 2nd gear...not noticeable anywhere else. Once in high gear, it smoothed right out. Had this happen twice.
Last year I had a slight vibration in 2nd gear only...turned out to be wear in the U joints. New U joints and it's smooth as silk again.


He has balanced the tires twice now . On a spin balancer . I told him call Hoosier and see if he did something wrong . Maybe they can only be bubble balanced ? Or maybe something wrong with these tires. They take 9-10oz to balance .even tried moving them around on the rim

Last edited by n20mstr; 06/25/20 08:22 AM.

....BAD A$$ STREET CAR.....
Re: Tires bounce in burnout [Re: n20mstr] #2789087
06/25/20 08:23 AM
06/25/20 08:23 AM
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Benton, IL.
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DaveRS23 Offline
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Check your tires for roundness. We see more and more tires that are egg shaped. And no amount of weights will offset it. I have a pair of MT drag radials that are so out of round that they will shake the fillings out of your teeth by 60mph.


Master, again and still
Re: Tires bounce in burnout [Re: DaveRS23] #2789091
06/25/20 08:49 AM
06/25/20 08:49 AM
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Milwaukee WI
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TRENDZ Offline
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Put the car on stands/ hoist. Run the car in low gear and look for oval running tire or wheel. It would not be unusual to see a powerful radial car to have bent wheels or axles.


"use it 'till it breaks, replace as needed"
Re: Tires bounce in burnout [Re: n20mstr] #2789092
06/25/20 08:55 AM
06/25/20 08:55 AM
Joined: May 2019
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W. Pa
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usp4u Offline
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Originally Posted by n20mstr
Originally Posted by an8sec70cuda
Tony, I'd be leaning more towards it being a tire issue. I've twisted driveshafts in the past and only had a vibration through 1st and 2nd gear...not noticeable anywhere else. Once in high gear, it smoothed right out. Had this happen twice.
Last year I had a slight vibration in 2nd gear only...turned out to be wear in the U joints. New U joints and it's smooth as silk again.


He has balanced the tires twice now . On a spin balancer . I told him call Hoosier and see if he did something wrong . Maybe they can only be bubble balanced ? Or maybe something wrong with these tires. They take 9-10oz to balance .even tried moving them around on the rim


If I had a tire that HAD to have that much weight....I'd throw it out.

Re: Tires bounce in burnout [Re: TRENDZ] #2789095
06/25/20 09:08 AM
06/25/20 09:08 AM
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Originally Posted by TRENDZ
Put the car on stands/ hoist. Run the car in low gear and look for oval running tire or wheel. It would not be unusual to see a powerful radial car to have bent wheels or axles.


I don’t know if I would say it’s “powerful” lol but it’s got an 8.8 from an explorer under it . Stock axles . We are going to run it on stands see what the tires rims axles are doing


....BAD A$$ STREET CAR.....
Re: Tires bounce in burnout [Re: n20mstr] #2789109
06/25/20 10:03 AM
06/25/20 10:03 AM
Joined: Jan 2003
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Marion, South Carolina [><]
an8sec70cuda Offline
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I'd definitely do what Trendz suggested! I forgot to mention a couple years ago I also had a vibration that turned out to be twisted axles. Again, wasn't noticeable at speed. I found it by letting the car idle in gear on jackstands.
https://www.youtube.com/watch?v=u7en1p9e7iU


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Tires bounce in burnout [Re: usp4u] #2789110
06/25/20 10:10 AM
06/25/20 10:10 AM
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MI, usa
dvw Offline
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He has balanced the tires twice now . On a spin balancer . I told him call Hoosier and see if he did something wrong . Maybe they can only be bubble balanced ? Or maybe something wrong with these tires. They take 9-10oz to balance .even tried moving them around on the rim [/quote]

If I had a tire that HAD to have that much weight....I'd throw it out. [/quote]

Apparently you've never balanced a bias ply slick
Doug

Last edited by dvw; 06/25/20 10:11 AM.
Re: Tires bounce in burnout [Re: dvw] #2789129
06/25/20 11:33 AM
06/25/20 11:33 AM
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Bend,OR USA
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Cab_Burge Offline
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Originally Posted by dvw

He has balanced the tires twice now . On a spin balancer . I told him call Hoosier and see if he did something wrong . Maybe they can only be bubble balanced ? Or maybe something wrong with these tires. They take 9-10oz to balance .even tried moving them around on the rim


If I had a tire that HAD to have that much weight....I'd throw it out. [/quote]

Apparently you've never balanced a bias ply slick
Doug [/quote] iagree haha


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Tires bounce in burnout [Re: Cab_Burge] #2789153
06/25/20 01:42 PM
06/25/20 01:42 PM
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Washington
skrews Offline
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As mentioned above, put the car on jack stands and run it in 1st gear and see if everything runs true. Tires are probably out of round.

Re: Tires bounce in burnout [Re: Cab_Burge] #2789178
06/25/20 02:47 PM
06/25/20 02:47 PM
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W. Pa
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usp4u Offline
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Originally Posted by Cab_Burge
Originally Posted by dvw

He has balanced the tires twice now . On a spin balancer . I told him call Hoosier and see if he did something wrong . Maybe they can only be bubble balanced ? Or maybe something wrong with these tires. They take 9-10oz to balance .even tried moving them around on the rim


If I had a tire that HAD to have that much weight....I'd throw it out.


Apparently you've never balanced a bias ply slick
Doug [/quote] iagree haha [/quote]

nope.
that sound ridiculous

Re: Tires bounce in burnout [Re: usp4u] #2789204
06/25/20 05:14 PM
06/25/20 05:14 PM
Joined: Dec 2006
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Byron, NY
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Just mounted and balanced these Brand New .... 7oz... I've seen that much and more, more times than not.

IMG_3550[1].JPG

'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60
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'05 Dodge Magnum R/T - Too Much to list
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Re: Tires bounce in burnout [Re: usp4u] #2789240
06/25/20 07:39 PM
06/25/20 07:39 PM
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Bend,OR USA
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Cab_Burge Offline
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I have a old bubble balancer along with a really old(1950 tech.) mechanical tire mounting machine.
I replaced Hoosier, they have a bubble on one tire at the edge of the where the tread would be whiney13.5x32x15 W slicks on my S/P car this winter with a new set of Goodyear 15x33x15. I did all the work here in my shop and when it came time to balance the new tires I had a really hard time balancing these tires on my old bubble balancer, the rims are a old set of Monoque 15x15 with 3.5 inch back spacing.
I mounted and balanced the Hoosier and I don't remember having the same issue as these Goodyear, the Goodyears needed very little weight, maybe 2.5 to 4.0 ounces per tire so maybe their not bad. I have ran them in the 1/4 mile(147+MPH) with no issues that I noticed luck


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Tires bounce in burnout [Re: Cab_Burge] #2789340
06/26/20 07:14 AM
06/26/20 07:14 AM
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Shelby mi.
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JAKE68 Offline
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WE HAVE A LOAD FORCE BALLANCER AND YOU CAN GET IT TO BALLANCE BUT THE LOAD FORCE MAY BE WAY OUT(EGG SHAPE). WE HAVE SEEN 25-50 LBS OF LOAD FORCE.


JAKES AUTOMOTIVE






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