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Re: Tire shake during burnout [Re: Bad340fish] #1423118 04/23/13 11:44 PM 04/23/13 11:44 PM
Joined: Feb 2004 Posts: 34,884 S.E. South Dakota ! bigdad Still Posting A Lot
bigdad Still Posting A Lot Joined: Feb 2004 Posts: 34,884 S.E. South Dakota !	check Yoke on rear ..

Re: Tire shake during burnout [Re: Bad340fish] #1423119 04/23/13 11:54 PM 04/23/13 11:54 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Didn't you go from a 6.17 to a 4.10? Thats a huge difference in tire speed if all else is the same. that is a big change but if he was running a 33" tire and dropped to a 28" thats 103.6 down to 89 so thats part of the difference IF he does change sizes... which I dont know

Re: Tire shake during burnout [Re: Leon441] #1423120 04/24/13 09:36 AM 04/24/13 09:36 AM
Joined: Jan 2003 Posts: 13,363 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,363 Marion, South Carolina [><]	Leon, we ran into a similar situation w/ the Camaro (436" SBC w/ a glide) I drive for a friend. Had a vibration at about 1/2 track that'd go away on the gear change. Car otherwise ran great, no vibration in the burnout that I could feel though. Turned out to be the front pinion bearing going bad. Changed it and the vibration went away. 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: Tire shake during burnout [Re: an8sec70cuda] #1423121 04/24/13 11:06 AM 04/24/13 11:06 AM
Joined: Sep 2003 Posts: 2,008 Sweet Home Alabama M MRMOPAR622 top fuel
MRMOPAR622 top fuel M Joined: Sep 2003 Posts: 2,008 Sweet Home Alabama	Not sure if I understood the question right,but if its on the burn-out with the Pro-Mods running they might have prep the starting line & track a little better than it was 2 weeks ago.If it is doing it at the end of 1st gear going down the track I would think it was in the drive train,not the tires.A Hi-Horse-Power light weight car can spin the tires & cause a shake,but most times they do it at the torque peak. PS just for the hell of it jack the rear end up,get you a coffee can tape a piece of soap stone on the top of it and set it close to your rear tires and see if one of your tires has got out of round. "To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"

Re: Tire shake during burnout [Re: MRMOPAR622] #1423122 04/24/13 08:06 PM 04/24/13 08:06 PM
Joined: Nov 2007 Posts: 778 Sherwood park, Alberta. go green super stock
go green super stock Joined: Nov 2007 Posts: 778 Sherwood park, Alberta.	I have not balanced my tires in years and they never shake in the burn out . How are your rear shocks and where do you have them set , if they are set too soft or soggy they can cause the rear end to oscillate and go from a slight vibration to a full on paint shaker . The tire is going into a old fashioned wheel hop caused by traction and lack spring dampener VS rear end wrap up and release . I see this all the time with bracket cars with entry level shocks or older shocks . 6.50 @ 226 MPH 4.25 @ 186 MPH https://www.youtube.com/watch?v=YX86DHGKBo0

Re: Tire shake during burnout [Re: MR_P_BODY] #1423123 04/25/13 05:26 PM 04/25/13 05:26 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 OP master
Leon441 OP master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Quote: Quote: Didn't you go from a 6.17 to a 4.10? Thats a huge difference in tire speed if all else is the same. that is a big change but if he was running a 33" tire and dropped to a 28" thats 103.6 down to 89 so thats part of the difference IF he does change sizes... which I dont know Did not change the tire it is the same 31" tire I have ran for years. Yes, it is a huge rear gear change. Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: Tire shake during burnout [Re: MRMOPAR622] #1423124 04/25/13 05:28 PM 04/25/13 05:28 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 OP master
Leon441 OP master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Quote: Not sure if I understood the question right,but if its on the burn-out with the Pro-Mods running they might have prep the starting line & track a little better than it was 2 weeks ago.If it is doing it at the end of 1st gear going down the track I would think it was in the drive train,not the tires.A Hi-Horse-Power light weight car can spin the tires & cause a shake,but most times they do it at the torque peak. PS just for the hell of it jack the rear end up,get you a coffee can tape a piece of soap stone on the top of it and set it close to your rear tires and see if one of your tires has got out of round. My car had no vibration down track. That is what another guy posted. Leon Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: Tire shake during burnout [Re: go green] #1423125 04/25/13 05:34 PM 04/25/13 05:34 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 OP master
Leon441 OP master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Quote: I have not balanced my tires in years and they never shake in the burn out . How are your rear shocks and where do you have them set , if they are set too soft or soggy they can cause the rear end to oscillate and go from a slight vibration to a full on paint shaker . The tire is going into a old fashioned wheel hop caused by traction and lack spring dampener VS rear end wrap up and release . I see this all the time with bracket cars with entry level shocks or older shocks . This car has a 4-link all moly round tube back half. There are no leaf springs to wrap up. The rear shocks are Santhuff double adjustable. They are old but have never leaked according to Santhuff they are in great shape. They are set fairly soft(8 clicks from tight) which may turn out to be a problem with the lack of torque using the 4.10 gear. We have never been able to run them any tighter than 5 clicks out on the bottom. Would have to check or look in my old log books to see where the extension is set. I think the rear Yoke deserves rechecking. As well as some other things. Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: Tire shake during burnout [Re: Leon441] #1423126 04/26/13 02:24 PM 04/26/13 02:24 PM
Joined: Jan 2003 Posts: 482 Marysville Wa M moparfan mopar
moparfan mopar M Joined: Jan 2003 Posts: 482 Marysville Wa	My Olds will shake the tires in the burn out if I don't have enough RPM,i'm referring to doing across the line burnout. If I do my burnout at 6k it will shake the fillings out of my teeth. Not sure if your stationary in the burnout Leon or going across the starting line. I try to keep the RPM around 6500 in the burnout. The car has a 632, glide and 4.10s with a 33 X 16 tire. 2017 Challenger R/T Scat Pack Shaker 2021 T/A 392 1970 Challenger R/T 383,727, 3.55, (Wife's car) 1970 Challenger R/T SE 440-4, 4-speed, 4.10 Dana 1972 Dodge Demon 396 W-2,904, 4.30, 10.660 @ 125.85 2020 Hellcat redeye

Re: Tire shake during burnout [Re: moparfan] #1423127 04/26/13 11:01 PM 04/26/13 11:01 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 OP master
Leon441 OP master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	It was happening both ways. I always start the burnout stationary. When I am in my groove I get the tires rolling then pump the line lock botton so the car can pull out on its own without overrevving. Once I got in the groove I just ignored the shaking which was reduced because I set the chip at 7,500 to try and elliminate the shake. Maybe the tires were hot enough and I should have been just pulling ahead. Leon Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: Tire shake during burnout [Re: Leon441] #1423128 04/26/13 11:10 PM 04/26/13 11:10 PM
Joined: Jan 2003 Posts: 482 Marysville Wa M moparfan mopar
moparfan mopar M Joined: Jan 2003 Posts: 482 Marysville Wa	Not sure same issue as mine, mine starts the shake because the tires are trying to hook (what if feels like anyway)I lift when it starts doing it. I did have an issue last year, the first time out (prior seasons tires on still) the car shook badly in the burnout and all the way down. I took the tires to the tire shop and they rebalanced them. Shake (vibration) was gone after that. I always leave the car up on the jacks so it surprised me the tires changed over the winter As far as balancing, i've never been lucky enough to not have to balance them, have always vibrated when I didn't. 2017 Challenger R/T Scat Pack Shaker 2021 T/A 392 1970 Challenger R/T 383,727, 3.55, (Wife's car) 1970 Challenger R/T SE 440-4, 4-speed, 4.10 Dana 1972 Dodge Demon 396 W-2,904, 4.30, 10.660 @ 125.85 2020 Hellcat redeye

Re: Tire shake during burnout [Re: moparfan] #1423129 04/27/13 11:25 PM 04/27/13 11:25 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 OP master
Leon441 OP master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Ran the car today with the 6,17 gear; Very little shake. But, noticed a small vibration momentary in the run. Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: Tire shake during burnout [Re: Leon441] #1423130 04/28/13 02:55 AM 04/28/13 02:55 AM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	I would think shocks being worn would be the culprit if the car runs clean down the track. A loose of worn heim maybe. Mopar to the bone!!!

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