2.5 2012

or just put a wheel size limit. 64mm at the inducer, no clipped wheels, with the biggest part of the comp wheel no bigger than 88 or 91 mm, which ever is agreed on. would this not eliminate something like an a S480 or hx60 from having any kind of advantage over a simple s465 or similar/smaller charger?
 
It needs to be limited to a s300 or Hx50 size turbo. And a T4 foot. No S400 or Hx60 or what ever. I know this class will take off. If you have a class they will come. And it needs to be teched by someone that has a clue what they are lookin at!
 
I agree with kino. Limit the exducer of the wheel to a stock size s465 or such and no bigger. Who cares if you have an s480 once you mod the comp wheel it is the exact same as a s465 so what's the point. I don't like limiting to the small frame charger because then alot of street trucks will still be knocked out because they put the more durable s400 series charger on there truck.
 
Diehard Ram said:
It needs to be limited to a s300 or Hx50 size turbo. And a T4 foot. No S400 or Hx60 or what ever. I know this class will take off. If you have a class they will come. And it needs to be teched by someone that has a clue what they are lookin at!
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I agree. Although an hx50 can make crazy power. I know of guys running them on built 2.6 motors so then another rule will have to be enforced with it to keep it a competitive 2.5 class or the 2.6 guys will be running with their hx50's. This would be a hard class to tech but it would be possible its just a matter of getting some tight rules to keep it separate from the 2.6 guys. One rule that could be thrown in to help separation is no hood stack since a lot of 2.6 allows them, and even 1" rear suspension travel. Drop the hitch height a couple inches. Not many guys that are set up to pull will want to jump back and forth on hitch height or suspension blocks since their truck is set up already. I think there are many options for rules to really make this class its own its just a matter of making them and teching them
 
The only problem I see with putting a limit on wheel size is teching it at pulls. I know full time pullers could be checked and tagged but this class is supposed to be for just anybody to jump in to, so if they've never pulled with the organization there cover would have to be removed and inspected at the pull.
 
^^^ Exactly. Thats where the trouble always starts is in the enforcing of the rules. Its easy to come up with a good turbo rule, but enforcing it and catching cheaters is always going to be the hardest part.
 
What's so hard about it. Pull the cover, measure the wheel, check the cover and put it back on. Stick a tamper proof tag on it after its teched. Charge the cost of the tag. Any other time they pull or need teched if its tagged and matches the number on file with no signs of tampering all is good. If the turbo is worked on then it needs a new tag and reteched. Anyone who hasn't pulled needs teched.

I don't understand the complexity. Its a modded street class. If you aren't there before tech sign in closes you don't pull. Simple as that. Or you pull exhibition.
 
Sure, thats easy on a cummins. Pulling the compressor housing off of a 6.4 powerstroke, duramax, etc... isnt going to be so fun and is going to take some time. Its not going to be real encouraging to the trucks in the parking lot if they have to dismantle their turbo(s) the first time they pull.
 
Even if you limit it to small frame turbos, there will be someone out there to bore out and fit in S400 components on a S300 mid section...

How much power can you push through 4" exhaust? What about 3" before EGT's become an issue?
 
My stock charger a pita. If I was running a t4 style mount the turbo would be sitting more accesable
Most trucks running a s series or similar charger are running modified mounts. And I honestly could care less if it takes me 20 min to pull the comp housing if I know everyone else in the class is legal. And I only have to do it once to pull in a 2.5 class with the same rules. All series run the same set and use the same database for tagged chargers and that cuts 3/4 of the tech out because usually 3/4 of the class pull every week. So tech em once take 5 min check the tag and hitch height and any other rules that are easily changed and go on.
 
Cummins Driver said:
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....
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This is the perfect class and the EXACT class I've been speaking of. This could work and be a very successful class, AGAIN, if given the chance. Good post, Eric.
 
That's when pulling was fun. To bad mine broke right off the line in that video.
 
x MadMAX DIESEL said:
So how is hiding weights under your bumper any "more street truck like" than hanging weights?
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Another question is how is it cheaper than hanging weights..... the idea of the class is to keep costs down and allow the guys with the true street trucks to pull right? Its not hard for a true street truck to hang some weight - but its a lot harder to bolt a bunch of plate up behind the bumper.
 
It is all about someone making a class that they can do well in, as soon as someone builds a truck dedicated to this class and starts cleaning house, you will see people wanting another class created.
 
Well if your gonna cry about all this weight bullchit why not add any.. I understand its harder on driveline, guess you will just have to take those precautions to make it stronger...

Here is a vid of my "Street Truck" over the weekend, No hanging weight across the scales at 6800lbs. Sorry about the poor quality.
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zstroken said:
It is all about someone making a class that they can do well in, as soon as someone builds a truck dedicated to this class and starts cleaning house, you will see people wanting another class created.
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^^^^^THIS^^^^^

pierce460 said:
Well if your gonna cry about all this weight bullchit why not add any.. I understand its harder on driveline, guess you will just have to take those precautions to make it stronger...

Here is a vid of my "Street Truck" over the weekend, No hanging weight across the scales at 6800lbs. Sorry about the poor quality.
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First of all - good looking hook - its a bit choppy here at work, but it looked good none the less.

Second - beefing up the drive line adds significant cost - I thought this was to be a low cost alternative to the 2.6 class? I'm just trying to fully understand if there is a point to this class other than a group of guys that can't hang in the 2.6 class and want a blue ribbon on Saturday night.
 
Smoke said:
This is the perfect class and the EXACT class I've been speaking of. This could work and be a very successful class, AGAIN, if given the chance. Good post, Eric.
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Thanks man. I think it could be a great class too. Its definately one i enjoyed watching and it was that hard to have a pretty competitive street truck in the class. Maybe things are different now, i dont know, but id sure like to see this class given a shot again:Cheer:
 
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