Tire shake

Is it possible to have tire shake and not feel it. As the driver?
I hate being the new guy

 

Yep. Mine wobbles the tire so often, I don't even notice. Except when it doesn't and it feels super smooth.

But that's not really shake in my opinion. People watching from the outside might go, "whoa, that was violent." But a little underspeed wobble that kills .02 will look a whole lot worse from the outside. When it really shakes for real, you won't have to ask anybody.

 

Oh for sure. You can have a shock going away and see just one tire start shaking. Still hit all your target wheel speeds. It just happens.

 

This weekend, two out of three laps the car went into tire smoke around 20-30 feet out. After the last run someone I trust said that it shook violently, but it felt like it just over powerd the track. Not sure what to do next. Thanks ITA.

 

To me, tire smoke only says one thing. Not enough traction for the power being applied to the tires. My dragster did that for a long time and I kept trying to figure why I did not have enough power to get up on the tire. Didn't have any real "eyes" helping me so I guessed at what was wrong. Found out that the track was totally sucking and I was simply overpowering it. What others said was "shaking" was actually only losing traction and standing the tire up smoking in a freewheel spin. Shaking is different than smoking. I don't go to that track anymore. Wasting my time if they won't prep the track.

 

Mike, I Dont think that I have a issue with too much wheel speed. I would be more inclined to say that I don't have a enough wheel speed. I have data, but unfortunately I don't have an accelerometer.
It was the first day of the year at the track and a little cold.
Thanks!

 

The car is a 125in FC. Rear gear is 4.29, the tire is 34.5x17x16 and low gear is 1.68.
Wheel speed at .25 is 1552.
.50 is 1760.
.75 is 2196.
I have always had some wheel spin, or a spike in the graph. At the hit. The one good run I had two spikes in the graph. The first at .06 seconds and the second at .32 I think that helped get the car to get moving. Not sure.

 

How bout where's speed a 1.0.
That looks way too soft. The spike is from jumping up on the tire which is ok. But then it falls off the tire and starts shaking. Most graphs at .250 is 1100-1500
.500 is 2800-3400
1.0 is 3800-4300

Now the high side is for like pdra prepped tracks. Low is is for avg non prepped local track. Those have gotten me down every track with a clutch car , converter helps and will mask your tuning mistakes , therefore making it easier to drive and tune

 

I am looking at
1500-2100 at .25
2500-3000 at .50
3100-3500 at .75
3600-4100 at 1.00

 

The 1.0 is 2606.
I do have some video of the runs in question. It's fair at best.

 

Over all of my run these number are very similar. Here comes the dumb question. How does someone increase drive shaft speed?

 

Are you pulling timing? If not then tranny ratio would be next.
You spike the tire early but it falls off pretty quick. You could raise the launch up 2-300 to help. -"are you full ignition timing ?

 

I'm not currently pulling any timing, but have the ability and I will be working towards that in the near future. As I'm new to the car I have the two step set at 3000rpm. It flashes at 6250. so I have plenty of room to go up in rpm.
What do you mean "full ignition timing"? Last year while I was licensing the timing was set at 24 degrees. I did move it up this year to 25 for the laps in question.
Info this is a tfx, brad v, roots car.

 

This is canter area. I'm a clutch guy. Maybe your converter is to tight or something. Me with a clutch just shoves more gear to it and make wheel speed that way.