Vibration/ Chattering Down Track
 

Did the same thing two weeks ago. so I changed all tires but still does it. "Chattering " is the best description, almost like it's losing traction.

TC and Stabilitrak were off. Will make hits this morning with Stabilitrak on.

Ideas?

1000+ hp, in a rock hard chassis, on the street while using a stiff sidewall road race tire?

i rode in a 950 whp supra that was doing this at 100+ mph. we thought it was wheel hop.

It's done the same first with MT, then Toyos on rears and 4S fronts (street tires). Could turning TC or Stabilitrak off cause this?

Also, where could I see this vibration in HPT data?

Is it under hard acceleration only or all the time even when just cruising at hwy speeds?

This is where it becomes weird - there is NO vibration on the highway (always slightly uphill) at WOT ... regardless of speed!

It shakes so badly down track (prepped track) you think of aborting the run.

is the track bumpy?

It's the Mile High Nationals track and I didn't hear anyone else complain, so It seems unlikely. I'm going back up at 1000 this morning to make a few hits, maybe with more air pressure.

that was my next question. what does that beast run? i missed your timeslips.

1.739 60ft
10.927
129.78

I removed Antigravity and put the stock battery back in it, and increased tire pressures rear and front. No vibration.

It's still a slug on the hit/ 2nd gear. I suppose I need to try max rpm foot braking or 1st gear launch.

Per NHRA factors, 10.92 at 6500 DA corrects to 10.04 at 0-1000 ft.

But this car only has six runs total, and only three w/o electrical and air issues. It lost all power yesterday in the pits.

I think it'll be a 10.50s car up here.