View Single Post
Old 09-16-2020, 07:55 AM   #3
J518
Junior Member
 
Join Date: Feb 2015
Posts: 73
Likes: 11
Liked 151 Times in 37 Posts
Default Re: Transbrake or Electrical issue?

Quote:
Originally Posted by voltdr View Post
Not sure of a lot of details about your car. Motor plate? Is it powder coated? Do you run a separate ground wire from the battery to the engine block? Do you just ground the battery to the frame? Do you ground the TB to the transmission?

Good rules to follow when wiring a race car.

1. Chrome moly does not make a good ground.
2. NEVER ground the TB to the transmission.
3. There is a lot of vibration on wire connections in a race car.
4. Use “star” type lock washers on all ground connections.
5. Poor grounding connections are the most common and the most difficult problem to diagnose.
Dan
Dan,
We run a front and mid plate. The batteries are grounded to the main 2x3 frame rails which now that I think of it are actually mild steel and all round tubing are chromoly. At the mid-plate which is also mounted to the main rails I run an 8 Guage ground wire to a distribution block inside the car. From there I run indivisual grounds to the transbrake and tb button. Delay box is npn, if you are wondering about the ground to the tb button.

Is my theory of not enough voltage for the transbrake and that when I apply gas the higher fluid pressures over come the transbrake out of the question? Not much of a transmission guy....
J518 is offline   Reply With Quote