down track shaking

From famous pros to weekend warriors, our friendly members will help answer your tech questions.

down track shaking

Postby 23t » Mon Jun 08, 2009 5:55 am

Throw me some ideas!! I'm having a problem with vibration/ shaking down track in the altered. From start to finish. The faster I go down track, the more pronounced it gets. I thought tire balance problem, but wouldn't that go away at some point? Its shakes so bad that with my glasses the finish line is a blur!!!!!

Front tires are not balanced. Goodyear 26x4.5x15
Rears are balanced, and weights are still in place. Goodyear 33x13x15
1923T altered dragster
User avatar
23t
 
Posts: 1239
Joined: Wed Aug 20, 2008 4:35 pm
Location: ohio

Postby pro70z28 » Mon Jun 08, 2009 7:06 am

Just my 2¢, if it gets worse as you go faster it sounds like a rotating part imbalance, - wheel or drive shaft lost a weight? Does the steering wheel shake? If it does it could be front wheels. If not could be rear wheels.
That's problee' what I would eliminate first Ann E. "Weigh".
nothing to say at this time.
User avatar
pro70z28
 
Posts: 8937
Joined: Fri Feb 24, 2006 12:17 pm

Postby pro70z28 » Mon Jun 08, 2009 7:09 am

Opps, didn't see the part about rear wheels not loosing weights. Still could be tire imbalance though.
nothing to say at this time.
User avatar
pro70z28
 
Posts: 8937
Joined: Fri Feb 24, 2006 12:17 pm

Postby 23t » Mon Jun 08, 2009 8:15 am

Thanks Pro, Don't shake in steering, mostly in seat area.
A friend here at the shop brought up to check the u-joints in driveshaft.
1923T altered dragster
User avatar
23t
 
Posts: 1239
Joined: Wed Aug 20, 2008 4:35 pm
Location: ohio

Postby greenracing » Mon Jun 08, 2009 9:30 am

Could it be driveshaft balance? Check and see if there may have been a weight welded on the driveshaft that came off.
User avatar
greenracing
 
Posts: 776
Joined: Thu Mar 02, 2006 12:50 pm
Location: NE Ohio

Postby 23t » Mon Jun 08, 2009 4:06 pm

Thanks guys!

When I get some free time I'll ckeck the drive shaft. It sure would be nice to have a smooth ride and be able to keep the finish line in focus. :lol:

Thanks again, Daryl
1923T altered dragster
User avatar
23t
 
Posts: 1239
Joined: Wed Aug 20, 2008 4:35 pm
Location: ohio

Postby pro70z28 » Mon Jun 08, 2009 5:10 pm

Maybe a pair of vibration dampeners for your glasses. :wink:
O.K. .........maybe not..... :lol:
nothing to say at this time.
User avatar
pro70z28
 
Posts: 8937
Joined: Fri Feb 24, 2006 12:17 pm

Postby 23t » Mon Jun 08, 2009 5:59 pm

:lol: :lol:

Or duct tape maybe? :lol:

Last year, racing at a local track, I hit a bump that cause my glasses to fall off. Not fun especially with a full face helmet that kept one of the temples poking me in the eye till I got stopped!!!
1923T altered dragster
User avatar
23t
 
Posts: 1239
Joined: Wed Aug 20, 2008 4:35 pm
Location: ohio

Postby stimpy » Mon Jun 08, 2009 9:38 pm

check your drive shaft to see if its bent or twisted , wheel bearings on the axles can be going , also the rear housing can be toeing in ( look at tire tread to see if this is culprit) also if you have slide on discs on the back they might not be seated against the axle hubs or improperly torqed rims ( car up on jackstands and spin the wheels and watch the treads and rims for movement ) slicks could also have a flat spot
Home of Dum Kat Raysin Praducks ..( SFI where??)




the Groom that went Vroom At DLN IV
User avatar
stimpy
 
Posts: 1116
Joined: Sat Jul 22, 2006 11:33 pm
Location: MP 127 on I-80

Postby 23t » Tue Jun 09, 2009 4:34 am

Thanks Stimpy.

Drum brakes on rear. But I have wondered about the slicks. Had it up on stands last week and ran it in gear, I did notice the slicks weren't rotating in a perfect circle!! Just though high and lows was from sitting. Now that I think about it, the car was on stands all winter and was only setting in the shop for 3 days before I set it up on stands and ran it. I hate to say that the slicks are about 6yrs old. 1/2 wore down but the wear pattern is wavy clear across like it should be.
1923T altered dragster
User avatar
23t
 
Posts: 1239
Joined: Wed Aug 20, 2008 4:35 pm
Location: ohio

Next

Return to Tech Questions

Who is online

Users browsing this forum: No registered users and 1 guest