2.6 Turbo Limitations

We just set our ITPA 2.6 rules a few weeks ago, and I love them.

We have put a 100mm limit on exducers to keep the daddy paid and built trucks out of the class. We are trying to make it an entry level class and if someone wants to build a full motor they can run the 2.8 class. This keeps everyone happy and keeps the price of a truck build down.

But in the same note, we know a few PSD's that can run a charger set to our rules and be safe and cost effective. We want them in our class and are trying to figure out a way to get them in.


As for teching turbos. We have a few techs out there who will pull the cover, measure the turbo and then wax seal it. Its the same process that NASCAR and NHRA use to tech the motors they run. If the seal is broken any time, it has to be re-sealed. That way when the truck goes to get teched, all they have to do is look at the back of the cover and see if the wax is still untouched and they are do. Super simple!

Now on a side note. I dont think water/meth and air/water intercoolers should be in the 2.6 class!
 
the 2.6 class this year already had clipped compressor wheels and special housings in the class
 
The problem is and I've been saying all along it takes more air to get the PSD to be competitive.
 
carfichris said:
Damn that takes all the fun out of the 2.8Ind S591/100/T6 1.10 I was working on.
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Just give it to me. We don't have that much teching out here, and one of the places I ran this year was an open single class!
 
Robts said:
I know II will build you a legal 2.6 class silverbullet that will pass spec

Im thinking that or HTTurbo Competition66
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Even on the high side of the BW tolerance window that comp wheel measure's 2.588". If you can pass a 2.650 bushing that's alot of gap. Although its well within the tolerance band of a million mile over the road semi truck charger.

How much is the II 2.6 legal silverbullet?

The HTT Competition 66, what do they get for the bullet beater?

We have built a number of them up both way's. Great combo's that's for sure.
 
zstroken said:
Just give it to me. We don't have that much teching out here, and one of the places I ran this year was an open single class!
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One thing you have to consider Dan, you have to run the manifold flipped and then the hood clearance becomes an issue. You have to section the hood so the top of the charger sticks through the hood much like they do on the Supra's and RX7's......are you ready for that step.

If you havent found my other post to you yet, this wont make sense but when you do......we could name it "Rice Cream Man"....:hehe:
 
I have found it. Wander if weird al has thought of that remake yet.

The money I am dumping in the truck this winter, pretty much point of no return!
 
97' CTD said:
What kind of wax we usein so I can get mine sealed right Meow :hehe:, just playin Jeff.
Brandon
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Brandon are you going to pull ITPA next year? Hope so, we need all the truck we can get.
 
jneal said:
Brandon are you going to pull ITPA next year? Hope so, we need all the truck we can get.
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It is not lookin like it buddy :(, I plan to run mainly NADM but I for sure will hit a few fairs and brush pulls around the area so I can hang with some of the Indiana Crew!
Brandon
 
We are having a lot of ITPA pulls this year, so it will be easy to find us! Plus id love to pull against ya!

I think a the problem a lot of orgs are running into is the guys that run huge 2.6 chargers and all the other goodies are the guys that come to meetings and help set up the class. They are the ones pushing for unlimited exducers, water, and air/water intercoolers and all kinds of stuff!This doesnt give the guy that hears about the class late or decides late to pull a chance. kind of a double edged sword.
 
another problem with that card rule is everyone would then have to buy brand new turbo's for this rule to work how many truck pullers want to change there turbo again for next year. I really dont want to buy a new turbo or even wait for them to come out with this card.
 
zstroken said:
ITPA has a max limit on the outer housing. Basically locking the 2.8 bushing class to a s400 or gt42 charger.
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Thats about the only way to get mid frame chargers out of the small frame class doesnt mean u cant put a 100mm wheel in a S300 but will the A/R b to small ?? mayb ED would know
 
The smaller housings of the s300's will hurt overall flow, but it is possible to get over 100mm in.
 
Im glad to finally get some feed back on this thread, i wanted to hear everybodys opinion on the the matter. I do agree that it is neer imposible to tech every turbo for an exducer limit, but was curious if their is another way. Like I said im just lookin out for the best intrest of the sport. Looks like I too will have to wait to see the 09 rules before I make a change.
 
Rods said:
factory wheels or custom billet ?
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Factory castings but not left 100% to factory dimensional specs. We also have some cast compressor wheel blanks we can machine the inducer and exducer sizes to meet the rules as needed. Originally they were to allow us to build the chargers to meet airflow needs as not every wheel size from BW is ideal off the shelf. Building them this way making makes fitting the rules an easy option.
 
ILLINOISRAM said:
If exducer is to hard to tech which i say it is, then maybe 2.6 turbos should be certified by the sanctioning org. Just like a cert card for clutches, each turbo should come with one wether it is from II, HTT, Schieds or E.D and upon finishing in top 5, be subject to tech verification at any time through out the year. If a makers turbo should get teched and happen to not pass, there turbos will no longer be allowed. This will make them follow the guidelines for size because they would not want there turbos banned. The pullers will have no choice but to buy a 2.6 ment for the class.

Do you think something like that would work? Tim
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I recommended this and they didnt seem to want any part of that. That is how the super farm tractor turbo is checked. You get it inspected at the beginning of the year and get a lead seal, if the seal is broken you dont pull or you get dqed.
 
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