Competition Dhra Rules??

[SBartel]

Just curious what are some of the possible changes to the DHRA rules for next season?

 

[DavidTD]

We are working to complete the rules for the 2007 season now. Give me a hint what class you are interested in as some will have little to no changes.

 

[zstroken]

Street class. If they allow dual CP3's heck they might as well not eliminate the RPM limit. When I mention that street class, and it should be stock appearing, the GM boys say "just limit it with the turbo" So if that is the case, just limit it with the turbo, let the open RPM limit stay. If you want more fuel, go buy a modded CP3

 

[SBartel]

Im wondering about the street class im planning on building a motor and it would be nice to know what some of the changes might be mainily what are the RPM's going to do?

 

[Bobcat698]

I am also interested in the new street class rules.

 

[Turbo Thom]

You must be referring to pulling.

 

[SBartel]

Yep Pulling! It hard planning without rules and by the time the updated rulebook makes it out its a scramble to try to get everything done by next spring...

 

[KevinH]

i wish they would go to the EEP rules, 2. 5 turbo no reducers or plugs. it's alot more competive here in ohio and it would be nice to be able to pull at the big pulls without having to buy another turbo

 

[zstroken]

What is the inducer size on the DMAX??

 

[JFaulkner]

Street class. If they allow dual CP3's heck they might as well not eliminate the RPM limit. When I mention that street class, and it should be stock appearing, the GM boys say "just limit it with the turbo" So if that is the case, just limit it with the turbo, let the open RPM limit stay. If you want more fuel, go buy a modded CP3

Who cares how many cp3's you have? Heck add one for each injector if you want! The amount of fuel that is injected is determined by the injectors and programming. Just by adding another pump your not increasing the pressure any higher than what the fueling box calls for, all you doing is keeping the rail full..... That's it! I find it funny that on previous threads the only ones saying that 2 pumps are not worth it, are ironically the guys that are selling overpriced modded pumps. Dual pumps work really well on the Duramax. People keep forgetting how the Common Rail fuel system works and how it's different from putting a 12cyl P-Pump on a 6cyl engine. Your not doubling the amount of fuel being injected, your only keeping it atomized. Limiting the air works just fine. No need for huge amounts of fuel if you don't have the air to burn it.

 

[zstroken]

Thanks for the expalanation on the CR system. I am saying no to the dual CP3's for rule purposes, people whining about not being teched properly, etc, etc. Make the rules simple, clear, and well defined. Don't go adding special cases for this and that. This will elimimate teching issues and discrepancies. In the superstreet, mod 2, 3, 400 CP3's it doesn't matter. Stock appearing covers alot of things, that is all I am saying. If somebody came up with 2 Ppumps on an engine and he will probably win, why?? cause if he had enough money to put two ppumps on the engine he probably has a lot more in the rest of the truck.

Your not doubling the amount of fuel being injected, your only keeping it atomized.

Dual CP3's or modded CP3's don't atomize your fuel, it just allows your system to keep the rail pressure from excessively deviating from the commanded for the high volume that the computer requests, and the injectors deliver.

 

[Diesel Power]

more pressure= more atomization, which= more power. end of story

 

[JFaulkner]

cause if he had enough money to put two ppumps on the engine he probably has a lot more in the rest of the truck.

But you seem to be ok with one modded pump, which if you haven't noticed, isn't exactally cheap. You seem to miss the point that just by limiting the air, the extra fuel doesn't add anything but heat and is worthless. Unless your going for a smoke show!

 

[zstroken]

Well you seem to be missing the point of the point I was trying to make Stock appearing makes the rules simpler, easier to tech. If you want to say stock appearing except for dual CP3's that is fine. What I am afraid of is dual CP3's first, then oh lets say it doesn't say anything about putting 2 injectors per cylinder(quickest thing I could come up wit, not very probable)now you have someone trying to squeeze this in, and then what is next. Your right, if you limit the air you limit the power to an extent. There are some tricks that can be done to maximize it and I guess that is what seperates first from second. Stock appearing is just simple and easy to decipher. "Does that look like a stock setup?" Yes/no?? Each time someone sneaks something by, we end up with a rule change. So your building the next years truck with last years rules.

 

[JDailey]

What the helll is a cp3? Sounds like something from star wars... dang internet pullers...

 

[mfunderburgh]

. If somebody came up with 2 Ppumps on an engine and he will probably win, why?? cause if he had enough money to put two ppumps on the engine he probably has a lot more in the rest of the truck.

Have you priced a set of dual cp3's? I had 3 times the amount of money in just a good cam for my cummins as what i can build myself a set of twin cp3's for. So if a truck now has a fancy paint job we probably should assume he has too much money in the motor too?

 

[Diesel Power]

Have you priced a set of dual cp3's? I had 3 times the amount of money in just a good cam for my cummins as what i can build myself a set of twin cp3's for. So if a truck now has a fancy paint job we probably should assume he has too much money in the motor too?

how do you like your PPE edge juice stack?

 

[mfunderburgh]

how do you like your PPE edge juice stack?

It's good for 500 hp and the best hand held tuner/module combo out of the box you can buy to put on an lb7 in my opinion. We have been able to find more power using efi live and writing our own programming but that takes more time than some people have.

 

[Kyle03D]

Say we pretend that modded cp3's work, hypoteticly here, if they did work..... they cost more than 2 cp3's.



Quit whining, if the duramax trucks wern't running on top this would be a non issue, just remember cr cummins need rail pressure too. And the last I checked, the only option other than 2 cp3's for a cr cummins is a $5000 kit for a non-stock appearing cp3. 4





Give it up, and maybe think about what kind of fuel system you should run to be on top in the street classes, and quit trying to have the rules written to keep old mechanical motors on top.





oh yeah cp3's arn't injection pumps they don't inject nor time any fuel delivery to the cyl.

 

[jwilliams3]

quit trying to have the rules written to keep old mechanical motors on top.

Last time I checked those old mechanical engines were on top?

Something change lately? :-laf