16 replies to this topic

[Jim Lange]

Can anyone give me a wiring diagram to do a Drag Controller with a Parma resistor, 9V relay and switch and also a transbrake button. I'm alot of things, but an Electrical Engineer is not one of them. Thanks

[Samiam]

Transbrake button?

[airhead]

This is the controller I use for drag racing.

[Samiam]

Billy,

 

He asked for a drag controller wiring diagram, not a wire drag controller.

 

I have a 1 ohm Parma Turbo slated for drag use. I would also like to see what I'm supposed to do before I do it.

[Foamy]

Black and white go from the controller to the relay then the track like stock wiring.
One wire from your 9 volt battery goes to the relay coil.
The other wire from your 9 volt battery goes to the power contact.
A wire goes from the ground (wire to trigger, white?) to the other relay coil.

 

Transbrake, NC push button switch goes somewhere in the power wire.

 

I *think* this is right. . .
 

[Jim Lange]

Black and white go from the controller to the relay then the track like stock wiring.
One wire from your 9 volt battery goes to the relay coil.
The other wire from your 9 volt battery goes to the power contact.
A wire goes from the ground (wire to trigger, white?) to the other relay coil.

 

Transbrake, NC push button switch goes somewhere in the power wire.

 

I *think* this is right. . .
 

Thanks Foamy. That's what I thought also except that when the transbrake is applied prior to WOT like it should be, the relay will bypass the power because the micro switch completes the circuit. No way to do it without a toggle turn off/on the relay. I chatted with Jim Difalco to confirm it. BTW Difalco is releasing a NEW style Dragtroller called the "Eliminator". Really nice piece. 

[Brainchild]

We can provide you with the parts to turn your Parma Turbo contoller into the “Hammer” drag controller. Check them out on facebook. Let me know if your interested, basic kit comes with everything you need for $100 plus shipping. We also offer optional Trans brake, push-to-pass, 100amp relay.

 

Brian

[SpeedyNH]

a 100A relay? really?

what's the pull-in time for one of those, with that mass? 50-250ms?

speedy

[Brainchild]

Results speak for themselves. The guys at ProSlot set the world record at the US Nationals in 2000 using home built controllers based on the original Cydex controller with a 400amp relay (.400 ET at 138mph). I'll give you a hint - If you want your 12V relay to turn on faster you might try using something other than a 9V 500mAh battery.

 

Hammer Drag Slot Car Controllers

[SpeedyNH]

why would you think that we'd be using a 9V battery?

I must be missing something here. track power. never mind.

I design and build my own electronic controllers.

speedy

just an old analog engineer trying to help

[Brainchild]

You must have missed the original post, he said drag controller. There is no track power when you only have two posts, most drag controller designs use a 9V battery to power the blast relay.

[SpeedyNH]

ah ok

[Robert BG]

Since we're talking controllers can someone explain how a "transbrake"works on a slot drag car? and what its actually doing to the car etc.

[Jim Lange]

Robert, it is a momentary pushbutton microswitch the interrupts the the power at WOT, allowing the operator to release it when the light comes on. This results in a much quicker reaction time than squeezing the trigger. The same exact way real race cars do it in bracket drag racing.

[Robert BG]

Thanks,in a sense I could actually wire one into my controller since I use a blast relay and there's no power other than relay contact on my final band.

 

I can see why they call it a transbrake but I was confused because the brake in my old Typhoon and Nova locked the trans in 1st and reverse and let me leave on the converter.Whereas I could never load the converter by ft braking especially with awd

[team burrito]

here you go:

[Guy Spaulding]