Natural safty switch

was at track this past weekend and was told I needed a naturel safty switch on my car;;have a blown alcohol fuel altered with PG trans and use blower starter to start it;also have Mallory supermag iv on it;;how do I wire in the naturel safty switch into my car to make track tech guy happy;??

 

You could use a relay to the shifter micro switch to interrupt the starter trigger. It adds a second plug in when putting the starter on but would prevent it from spinning unless it's in neutral or park.

 

There is a way to make a neutral safety switch with a blower starter.

Run a wire from the toggle switch on the starter to a plug in, you will need to plug this into the chassis wiring harness, that harness is very simple. It goes from the starter/blower pulley location to the neutral switch on the transmission, if its in neutral the switch is closed and completes the circuit. Another wire goes back to the starter/blower pulley location and is plugged into the starter solenoid.

So if you are in gear, the solenoid won't get the signal.

I hope this makes sense, a drawing would be easier to understand

 

I'M thinking same thing;;shouldn't have to have a neutral safety switch with blower starter;;just the outlaw track I've been testing at said they want one on all cars;;Don't want to cause waves there but thinking I may have to find NHRA rules saying not needed and show them but then again it is a outlaw track and they sort of have there own tech rules.they are done for this season so guess have all winter to see how can go about it
to make them happy..

 

In pulling, a neutral start switch is mandatory on all vehicles (have seen a few get started in gear-not fun). As said, use a micro-switch on shifter handle and wire in normally closed position when lever is in neutral. Have it go to switch on starter via a two prong plug in on starter assembly. It is really quite simple and not at all a hassle when starting. JW

 

To me, the worst scenario is not having a neutral switch with a blower starter. Look at where the crew guy is standing.

As bandit496 said, it is very simple

 

Looks like i'll go ahead and do one as Bendit said;;Was already thinking that just another thing got to depend on a crew member to unplug before removing starter but I do see the safety issue with running over a crew member;;to hard to find good crew members so last thing need is hurt a crew member;
Thanks Everyone for your input;;

 

Would the track accept a switch in line with the kill switch. Crew could spin the blower all he wants but until the trans is in nutural the mag is grounded. After removing the starter that pathway is eliminated?

 

As has been noted, it's not a particularly safe place when you're starting the car.

When we built mine, I didn't want my crew having to fiddle about with extra leads when the motor was running, so we put a neutral indicator light so it was easily visible to the person operating the starter. Not bullet proof, but better than nothing.

A crew member on another blown car in my race class lost a finger checking that the fuel shutoff was fully open just before waving the driver into stage with the bloody stump, so anything that prevents unnecessary manual intervention is good for me...

Martyn

 

Our wires and the guys I helped last weekend are not even close to the pulley/belt, they are right by the solenoid on your blower starter, right where your hands already are.

 

A simple two-prong plug on the starter (about 6-8" wire lead) with a simple two-prong receptacle attached near the starter bracket on the motor (wired to the neutral switch) suffices. When the starter is removed from the bracket, the corded plug pulls from the recept. No extra finaggling with anything. JW

 

auxillary battery to neutral and kill switch

is it at all possible to run an onboard auxillary battery, thats wired to kill switch to neutral saftey switch, easy if running an electric kill switch obviously.

If running an air kill: then auxillary battery to off / on toggle switch to neutral safety to off/on air electric switch in the air line.

when toggle is on activated to micro switch that in turn activates the inline air / electric switch blocks air to kill switch. when engine starts gear lever is moved this turns off the inhibitor switch, and opens the air to kill switch.

maybe its not that simple with air kill....maybe no or nc valves or some type of system that over-rides some how.

not having a neutral saftey is madness no matter what the nhra rules say

i run a lenco lever to a b & j 3 speed. i have a micro switch set at the neutral position of shifter, religiously checked neutral to lever is neutral at the reverser. email me for pictures of bracket i made.