rgullett83
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- Feb 21, 2008
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Latest updated Rules...
True 2.5” Inducer Bore NO CLIPPED WHEELS / NO BUSHINGS / NO
TAPERED COVERS
・ .200 MAX mwe Groove
・ No Hanging Weight Beyond Front Bumper (Ballast Permitted)
・ 8000lb Maximum (With Driver)
・ 26” Hitch Height
・ DOT Tires
・ No Dual pumps, no compressed gases or Power Adders of Any Kind
・ Diesel Fuel Only
・ Traction bars are allowed
・ Valid Registration and Proof of Insurance Required
・ Single Wheel Trucks Must Run Single Rear Tires, Factory Dual Rear Trucks are Permitted to Run Dual Rear Wheels
Caleb
So... how is that really any different than say the 2.6 rules were before some of them went protrusion? I see no hanging weights - that just adds cost and complexity. I see no dual pumps - forcing guys to purchase big single pumps, I see turbo rules that are the same as the old 2.6 rules with the exception of the bore size and possibly a narrower MWE groove - so it still allows guys to go build S480/88 chargers with 2.5" covers on them.
What is the intent of "compressor blades must be perpendicular to the shaft"?
I see NO cost savings in this class if that is what it is suppose to be for. It looks to me like a bunch of guys can't get around the current crop of 2.6 trucks and want to make another class so they can win a blue ribbon. Next thing you know everyone will be complaining how the big bad 2.6 trucks are dropping down into the 2.5 class and beating up on them.
They are saying the comp wheel must be in the 2.5 bore, no contouring of wheels etc. In theory it is great, enforcing that rule might be something else. The class will work great for awhile, until someone pushes the rules to the limit, then we will be talking about a 2.4 class...
The Validity of the class relies on the ability of the person teching to understand the concept of the class, and to tech it accordingly.
Caleb
PS This class was seen at the Fass Diesel Nationals in Indy this year.
http://www.nhrda.com/Flrz-2011/0610-Info.pdf
Pages 8-11
That is always the case, but what happens when trucks with $4000 chargers, heavy ported engines, and 3000 cp3 start showing up in the class and whooping on the others? Folks will cry for a 2.4, then 2.3, then 2.2.
I agree it would be nice to have a budget class, but look at garden tractor pulling, you have folks buying aftermarket blocks for those classes.
What a thread! There are lots of good ideas in here; its just that some of them are hard to put into effect because of time and man power limitations in teching, etc...
Personally; and i only pull once in a while, so take my opinion for what its worth, Id like to see the 2.6 class dropped and have a 2.5 class and a 2.8 class in effect. Somehow limit the 2.5 class to a charger with a straight 2.5 bore with the wheel protruding into the housing, no busings, etc... Obviously this part is where the rules always get hard to make and i dont have a perfect solution for teching the chargers, but something like an S465 would be the model turbo for the class. I believe this way, even a charger like a 64/71/14 or even a good 62 could be pretty competitive, and those are actually reasonably streetable chargers. Probably not gonna win with an S300 based charger(unless the class was limited to a small frame), but you arent gonna look stupid either. By eliminating the 2.6 class you really havent hurt anybody either. Now all the 2.6 trucks can just pull their bushings out and go back to 2.8. They dont even have to spend any extra $$ this way.
Here is our 2.5 class at stanfords diesel mania in 08
http://www.youtube.com/watch?v=md6WqJ7SekA
Lots of those trucks had stock chargers too. You can see most everyone was in the ball park. The 6.0 powerstroke at 1:10 only has an SCT tune, a decent setup and stock transmission. He got beat obviously, but not murdered. The old gray flatbed 12 valve at 3:05 had nothing but some full cut DV's, stock turbo, and a good clutch. This was just a great class IMO. Even a street truck with a decent setup could come in and be competitive and have a lot of fun. I have a stock 3rd gen charger on my truck, but as far as im concerned, it wouldnt bother me to group work stock into a 2.5 class like this instead of making them 2 seperate classes. It would cut down on tech time and they would still be competitive.
Some of you guys will say this is a pulling class and that its not affordable for everyone and everyone cant win, etc... I understand that, but I do think the class could be made more affordable. A class like this( IF you could keep it this way) would be great for most street trucks. It just seemed to me like the class was a lot more fun to watch when it was like this instead of the current 2.6.
Not saying any of this will ever happen again, just dreaming of days past i reckon....
They are saying the comp wheel must be in the 2.5 bore, no contouring of wheels etc. In theory it is great, enforcing that rule might be something else. The class will work great for awhile, until someone pushes the rules to the limit, then we will be talking about a 2.4 class...
Turbocharger: The turbocharger is limited to a direct bolt on. No adapter plates allowed. T4 foot limit. With an inducer bore of 2.5 limit, measured with a 2.55 plug with zero tolerance. 6.4 liter powerstroke engines may utilize the factory compound-turbo configuration.
YOU CAN NOT DO CUSTOM COVERS ITS A STRAIGHT BORE CLASS. REPEAT NO 480S WITH 2.5 COVERS. IT 100% OF A TRUE BORE 2.5 CLASS. NO MORE NO LESS.
True 2.5” Inducer Bore NO CLIPPED WHEELS / NO BUSHINGS / NO
TAPERED COVERS
THIS has been said 20 times now guuys there are not custom covers or hx 60 ever going to be in this class cause it wont be a true 2.5 charger