|
Tire shake during burnout
#1423098
04/21/13 01:50 PM
04/21/13 01:50 PM
|
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
OP
master
|
OP
master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
|
I know this is probably a dumb question for those who have had this or know someone who has and fixed it.
After 20 plus years of racing I have seen this and just assumed something was screwed up and never personally got envolved.
Yesterday I had this issue. I run 6,800 stall converter. So I have to zing the whells pretty good to keep from heating the tranny fluid.
I tried the burnout at 6000 like I did a couple weeks ago. First pass I noticed the moment the engine hit the rev limiter the tires would shake bad. I came back and found two cold cylinders. One was account a bad spark plug wire. The other was account a wire that was not on the plug well enough as these spark plug boots seem to be pretty difficult. So I though this will fix the slow ET and the tire shake as maybe it was due to the way the engine performed against the rev limiter.
Second pass tires still shake just as soon as the engine bumps the limiter. The miss seemed to be fixed. Might add the ET was better but, still not what it should be.
Raised the limiter to 7,500. The tires still shook at 6,000 and shook less at 7,500.
Now that I have fully bored you all to death. If you or someone you know had tire shake during the burnout what was the fix?
I fully would expect it to be the tires but they were fine a couple weeks ago. Old as the Mayflower but, did not shake.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
|
|
|
Re: Tire shake during burnout
[Re: Leon441]
#1423099
04/21/13 02:01 PM
04/21/13 02:01 PM
|
Joined: Feb 2009
Posts: 1,532
off the grid
340B5
pro stock
|
pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
|
This is a little off the wall, but could the wind have blown some of the VHT mix back to the burnout area?
Yeah, it's got a smallblock.
|
|
|
Re: Tire shake during burnout
[Re: Leon441]
#1423100
04/21/13 02:03 PM
04/21/13 02:03 PM
|
Joined: Aug 2003
Posts: 43,161
Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,161
Bend,OR USA
|
Are you running tubes in them? If so maybe one of them has a tube folded up causing a heavy spot now   I have seen this more than once, that is one of the reason I don't run tubes now  The cure is to jack the car up off of the tires and let all the air out, rotate the tire several times and then inflate them slowly several times and let the air out after each time and then inflate them again and see if that fixes it, if not you may need to dismount the tires and remove the tubes so you can inflate them outside of the tire to straighten the folds out
Last edited by Cab_Burge; 04/21/13 02:05 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: Tire shake during burnout
[Re: 340B5]
#1423101
04/21/13 02:04 PM
04/21/13 02:04 PM
|
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
OP
master
|
OP
master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
|
Oh I don't know. It was windy and the guy sweeping the burnout box kept sweeping the gravels and dirt between the lanes. Then a Promod would blow the stuff everywhere. The guy needed a little coaching. But, that said, I have ran in a lot of crazy cituations and never had this issue before.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
|
|
|
Re: Tire shake during burnout
[Re: Leon441]
#1423102
04/21/13 02:05 PM
04/21/13 02:05 PM
|
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
OP
master
|
OP
master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
|
Don't run tubes. Should have mentioned that.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
|
|
|
Re: Tire shake during burnout
[Re: Crizila]
#1423106
04/21/13 03:52 PM
04/21/13 03:52 PM
|
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
OP
master
|
OP
master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
|
Plenty of water as they were spraying the pit before I rolled in. The tire pressure was the same we had ran in the past. These tires were ran all year in 2010. If it were balance it should have been a problem then, shouldn't it?
I am wondering if they have broken a cord or something. They were smooth going up the track.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
|
|
|
Re: Tire shake during burnout
[Re: Leon441]
#1423107
04/21/13 04:01 PM
04/21/13 04:01 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Plenty of water as they were spraying the pit before I rolled in. The tire pressure was the same we had ran in the past. These tires were ran all year in 2010. If it were balance it should have been a problem then, shouldn't it?
I am wondering if they have broken a cord or something. They were smooth going up the track.
Leon
Since it was the first 2 passes I would still say
it was a balance issue.. the tires sat and get flat
spots from sitting then you go out and try to make
them round again and down track you have enough
centrifugal force.. balancing is cheap... JMO
I have a small bubble balancer that I use alot
|
|
|
Re: Tire shake during burnout
[Re: Duner]
#1423110
04/21/13 09:44 PM
04/21/13 09:44 PM
|
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
OP
master
|
OP
master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
|
I RAN THE CAR WITH THESE TIRES TWO WEEKS AGO WITH NO SHAKE IN THE BURNOUT.
They may have sprayed too far back but, I didn't witness anyone else having the problem. I have a 4.10 gear and was tuning the engine 6,000 in the water don't think it was lack of wheels speed. LOL
The car is 4-link with wish bone. Checked all the bolts and shock bushing while I was repairing a broken anti-roll bar connection. Found this while getting the car ready to race over the winter. It was an old brake from 2010. The tires may have shook back then and broke the mount. Don't remember what happened last year much less 2010.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
|
|
|
Re: Tire shake during burnout
[Re: Leon441]
#1423113
04/23/13 10:38 PM
04/23/13 10:38 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
I'll try some new tires
Good luck with it... that should correct your issue
|
|
|
Re: Tire shake during burnout
[Re: bigdad]
#1423114
04/23/13 10:41 PM
04/23/13 10:41 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
I can't wait till it warms up to sport my cool t-shirt I got from Leon !!
Love that big back glass car 
Leon whats this... you have T-shirts... bring some to
DW... XL... what kind of price...thanks
|
|
|
Re: Tire shake during burnout
[Re: slomoshun]
#1423116
04/23/13 11:16 PM
04/23/13 11:16 PM
|
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
OP
master
|
OP
master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
|
Just changed the rear gear. Maybe I should do some more looking.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
|
|
|
Re: Tire shake during burnout
[Re: Leon441]
#1423117
04/23/13 11:31 PM
04/23/13 11:31 PM
|
Joined: Jan 2003
Posts: 8,022
Tulsa OK
Bad340fish
master
|
master
Joined: Jan 2003
Posts: 8,022
Tulsa OK
|
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.
68 Barracuda Formula S 340
|
|
|
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
|
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
|
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
MRMOPAR622
top fuel
|
top fuel
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: Leon441]
#1423126
04/26/13 02:24 PM
04/26/13 02:24 PM
|
Joined: Jan 2003
Posts: 482
Marysville Wa
moparfan
mopar
|
mopar
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
|
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
moparfan
mopar
|
mopar
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
|
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
|
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!!!
|
|
|
|
|
More air or don't roll out of the water quite so far. How much glue they use in that area can also cause it. If it's only occasionally, it's most likely track prep. donletitbodderya!
