[WI Huck]

The 2007 rules are out and I like them. Here is a link, http://www.hdiesel.com/eventpage.asp?TruckPullRules .

We are looking forward to another big year. I know that there are lots of trucks getting ready so hopefully the diesel class will dominate the show! See you there.

 

[STROKE THIS DMAX]

They look good to me as well. Anyone have any ideas or info on the shut-off and fuel dump?

 

[dmaxlover]

A fuel dump won't work unless it's installed after the fuel filter. There's a lot of fuel in the filter, and the engine would still run for awhile after shutting the fuel off. The best bet is to do it electronically. I have an air shut off in the works, and will post pics when ever I get it completed.

 

[JerrodGlover]

Page 582 of McMaster-Carr has some air shut-offs as cheap as you will ever find.

 

[STROKE THIS DMAX]

Page 582 of McMaster-Carr has some air shut-offs as cheap as you will ever find.

You got a part # on them, all I can find is small stuff.

 

[dmaxlover]

Page 582 of McMaster-Carr has some air shut-offs as cheap as you will ever find.

Those will work, but they are manual operation only. The one i'm putting together will be electrically tripped.

 

[WI Huck]

"A sled and driver-operated spring-loaded emergency air shut off is mandatory. The cable must terminate into a two inch diameter steel ring."

It looks like the rule is written for a cable operated shut off for the air.

"All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injection pump. A three way dump valve is recommended."

The fuel shut off looks like it would be easier to make electrical. John you have a good point about the filter. I was thinking about putting in a tee before and after my pump so fuel would just bypass around and around. With no fuel flowing to the filters you would get a big vacuum pretty quick and the engine should shut off. I have not tried it yet though.

 

[moss022]

so much for street driven trucks! dont worry about me being up there! maybe to watch though

 

[STROKE THIS DMAX]

I'm thinking that if you have a air shut-off that works than the fuel shut off could be more for "show".

 

[dmaxlover]

I'm thinking that if you have a air shut-off that works than the fuel shut off could be more for "show".

Exactly. I don't care if you have a 55 gallon drum dumping fuel straight into the intake, if you cut off the air the engine will stop. There is no way in he11 I'm am going to zig zag a cable from the engine compartment all the way to the rear of the truck and in the cab. That's just foolish when it can be done much more dependable and easier with 2 wires.

 

[WI Huck]

I am sure that they are looking for a redundant backup. That way if one does not work for some reason the other one should. Too big of a risk when a truck is out of control.

 

[lubeowner]

"All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injection pump. A three way dump valve is recommended."

quote]

It doesn't state where this shutoff should be, just that the driver can get to it. It also doesn't specify that the driver can't get out of the truck to turn the lever. It also just states that it must be capable of blocking fuel flow to the injection pump. It doesn't state where in the system it has to be. So just cut the main fuel line and put a on/off lever valve on the frame rail. You will most likely never use it.

 

[thejdman04]

"All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injection pump. A three way dump valve is recommended."

quote]

It doesn't state where this shutoff should be, just that the driver can get to it. It also doesn't specify that the driver can't get out of the truck to turn the lever. It also just states that it must be capable of blocking fuel flow to the injection pump. It doesn't state where in the system it has to be. So just cut the main fuel line and put a on/off lever valve on the frame rail. You will most likely never use it.

Oh boy sounds just like the arguments we get here at the local county fairs. Everyones always going to try to interpret and bend the rules human nature I guess. But I think we all know that they would like hte fuel shut off to be w/oin reach of the driver at all times to control a run away truck. I agree it will probably never ever be used but I think we can all agree thier intentions are to get hte truck shut down right away which means having it w/in reach of the driver. ONe of thie things hta tmakes me hate tractor pulling (besides the high cost) is all the bickering and people breaking rules. Come on guys lets be honest and have fun. The fact is (esp at county fairs w/no high tech tech dept) people can easily cheat. IF all your in it for is bending and breaking the rules and it takes you doing that to beat me then go ahead and do it. The fact is they could and woudl have to take a book 200 pages long to cover all bases.Ok rant over off my stool, just when guys like that bend the rules and suck the fun out of it makes me mad. I know some guys will say "but the rule book doesnt specify, and probably tehcnically your ok getting away w/it on the frame rail but we know the intentions.

 

[WI Huck]

:exactly: I agree. Besides, I will be one of the inspectors and "driver operated" means from the driver’s seat. If you think that you will reach under your truck in an emergency situation you are coo-coo!

 

[lubeowner]

:exactly: I agree. Besides, I will be one of the inspectors and "driver operated" means from the driver’s seat. If you think that you will reach under your truck in an emergency situation you are coo-coo!

I feel that the rule wants there to be a way to stop the fuel flow to the injector pump with a valve that can be turned by the driver. My system does just that.

First off, A fuel dump valve will do nothing in a break away situation. The air shutoff or kill switch connected to the sled will stop it. If that doesn't work then the driver must stop the truck, by either stepping on the clutch, brake or putting the vehicle in nutral. I just don't feel that dump valve will be very far up the list of a driver's reaction.

On an engine run on situation then you will need to use the air shut-off to kill the truck, exspecially if it is cause by a bearing out of the turbo and the truck is running on engine oil. In this case you would have plenty of time to reach under the truck and turn the valve to off, if the air shut off doesn't kill the truck. I have seen run on situations with no saftey rules and they are able to open the hood and get the truck to shut off. I can get to the fuel shut off lever faster than I can get the hood open.

I just bring this up as conversation because I know that this will be discussed sometime, and according to the rules this system is ok. I personally was putting an electric operated off valve on the frame with a switch on the dash to control the valve.

The rules just were released, change the rule to,

All trucks must be equipped with a driver operated, from the drivers seat, fuel shutoff capable of blocking fuel flow to the injection pump. A three way dump valve is recommended.

 

[WI Huck]

If I had my way the fuel delivery rule would state that on mechanically based fuel injection systems (like the Bosch P7100 injection pump) there should be a fuel shutoff capable of blocking fuel flow to the injection pump. On electronic based injection systems (like the VP44 injection pump or common rail injection systems) there should be a driver operated master cutoff switch that stops the flow of fuel to the engine. A working ignition switch would qualify.

We have another meeting before the season starts where we can iron this stuff out. The way the rules are written for tire size is strange also with a maximum of a 16.5 inch by 10 inch wide rim. For the most part the rules are written for street capable trucks, not the modified light like the DHRA has.

 

[moss022]

mark, love the idea about the fuel shut off....mind if i use that!

 

[dmaxlover]

A working ignition switch would qualify.

Mark you just read my mind. The key is the only fuel shut off I had planned other than an air cut off. Both of which will be accessible from the drivers seat.

 

[big_jon00]

Humm the 16.5 x 10" rims what the point of limiting the rims height if we can only run up to a 35" tire anyway.. I was planning on running my 18x9.5" rims again this coming year.. there were not any problems running that size rim last year is there going to be this year??
Would that mean that truck that are coming with 17-20's stock are going to have to run 16.5-16" rims??? This would also rule out H2 rims if the height is going to be an issue..
Just another point I guess that could be clarified before the start of the season.
Thanks,
Jon

 

[STROKE THIS DMAX]

On electronic based injection systems (like the VP44 injection pump or common rail injection systems) there should be a driver operated master cutoff switch that stops the flow of fuel to the engine. A working ignition switch would qualify.

I like the way you think. That would be easy and should qualify.

We have another meeting before the season starts where we can iron this stuff out. The way the rules are written for tire size is strange also with a maximum of a 16.5 inch by 10 inch wide rim. For the most part the rules are written for street capable trucks, not the modified light like the DHRA has.

The 16.5x10 wheel rule was always for SS and OS. I don't think it applies to the diesels.