Competition DHRA stock class turbo rule

[DESL PWR]

The turbocharger is limited to a stock-appearing, OEM make-specific charger only. Turbochargers

from different years in the same make may be interchanged.

So, what does this really mean? WH1C/HX35/HY35 chargers only? Possibly internal mods like HX35/40 hybrids? Are the s300 variants legal? Please help in deciphering this for me.

 

[fest3er]

OEM make-specific: if Dodge never shipped an HX35/40 hybrid, such hybrids should fail tech when installed in a Dodge *if they visibly differ from OEM stock chargers*. If Dodge never shipped an s300 variant, such chargers should fail tech when installed in a Dodge.

Interchange different years: you can use a turbo from an '89 first gen on a 2007 CR, though I don't know why you'd *want* to.

In a sentence, upon opening the hood for a visual inspection, the charger must look as it did (or would have) when it left the factory mounted on a Dodge truck. Hence 'stock-appearing'. I say 'would have', because it would be silly to require everyone to use *only* chargers that actually shipped with Dodges; an exact replacement from Holset should be considered the same as OEM.

It is most likely to be interpreted to mean the following. Assume you have a '99 Ram/Cummins:

• the charger must have been OEM on a Cummins-powered Dodge Ram
• the charger must look, from the outside, to be a stock charger; that is, stock compressor and exhaust housings, stock flange, stock wastegate (if so equipped), et al, must look OEM.
• the internals can be customized by using custom/trick turbine and compressor wheels, for example
• It's probably fair to say that non-Dodge-OEM housings will fail tech, that aftermarket wastegates will fail tech. If, for example, Dodge never shipped a Cummins-powered RAM with a 24mm exhaust housing, a 24mm exhaust housing would fail tech.

My comments apply to the Work Stock class only, as DP inquired. As always, the final interpretation/translation rests with DHRA's Tech Services.

 

[KevinH]

if you don't own a duramax your not gonna win , so build a $50,000 dedicated puller and enter the strret class. I'm not a big fan of the DHRA rules

 

[Bobcat698]

You don't think a CR would be competitive in work stock?

 

[jwilliams3]

You don't think a CR would be competitive in work stock?

The Dodge CR would be competitive in work stock. But I wouldnt want to be the one melting pistons and blowing parts due to out of control egt's from pulling with a stock charger.



I think the work stock class should allow up to a 2. 5 or 2. 6 charger to give the Dodges a shot against the larger stock DMAX charger.

 

[DESL PWR]

Hmmm, as you can see I have a 97 with the HX35. My wastegate has been leaking for some time now so I disabled it. that was all fine with the stock plate, but recently I got into it and saw 45lbs :{ Not Good! So I wanted to pick up a 14cm wastegated housing, but I also wanted to start off small in the stock class. Just cant find $50,000 in the seat cushions for that street class puller. :-laf I guess that housing wouldnt be technically legal.

 

[Dieselgr169]

If you got the money schied's stock appearing hx35 you will be very competetive with a dodge in work stock. They change the inducer, exducer, and exhaust housing. and also do some clean up inside the intake housing. there about 2800. 00 but you gotta pay to play. :-laf

 

[JFaulkner]

if you don't own a duramax your not gonna win , so build a $50,000 dedicated puller and enter the strret class. I'm not a big fan of the DHRA rules

No offense but you sound alot like those people who thought it was a good idea to have an RPM limit in order to prop up the CR cummins. Now you want to bend the turbo rules to do it again. If the D-max just happens to be set up better to pull in the stock class so be it. Don't hate DHRA because cummins uses a restrictive turbo, just step up a class. I don't hear many Ford guys complaining, and let's face it if anyone needs a little help from a set of cookie cutter rules it's them.

 

[DCreed]

Furd guys dont complain, they cry! LOL!

 

[jwilliams3]

No offense but you sound alot like those people who thought it was a good idea to have an RPM limit in order to prop up the CR cummins. Now you want to bend the turbo rules to do it again. If the D-max just happens to be set up better to pull in the stock class so be it. Don't hate DHRA because cummins uses a restrictive turbo, just step up a class. I don't hear many Ford guys complaining, and let's face it if anyone needs a little help from a set of cookie cutter rules it's them.

J,

The person that championed the RPM limit was a VP44 guy at the time.



Better check your facts.



By the way the CR Cummins dont need to be propped up.

I run against big rpm trucks all the time and hold my own and thats with 3500rpm.



People that dismiss the CR Cummins for sledpulling are just flat out ignorant.

 

[KevinH]

i think the ford guys should get some help. come watch an EEP pull with the 2. 5 rule and you will see chevys, dodges and fords within 10ft of each other

 

[zstroken]

The way to to fix some of the issues with work stock is make it a not points series. Let people get their feet wet, have fun and if they need to run for points step up to the next class. Sounds like the rule changes for the next street class will be a street class.

 

[Dieselgr169]

I totally opposed the rpm rule cuz my pullin truck is a 12v. But I can see the the position that DHRA was coming from. They were catching heck from anyone that ran a dmax, pwrstroke, or a 24v cause Guys like dan painter was spinning 6000rpm's in street class. It's wasn't Dan's fault; he was completley within the rules! They were just trying too satisfy everyone! And now you still have people whineing! Don't pentalize cummins cuz they stronger bottom ends!