2.6 Protrusion Consensus

[zstroken]

Originally Posted by Smokem

My opinion;

2.6 Class
inducer bore must be 2.6" for it's entire length
wheel must protrude 1/8"
limit turbine housing to T4
limite single 35" tire
S300 MWE allowed
S400 MWE prohibited

The other classes are another story.

So MWE prohibited in the s400 just adds cost correct? I agree with some limits on the MWE, just go with the .200 and call it good. Reevaluate in another 2 or 3 years.

[Smokem]

Pressing a slug into the bore to eliminate the MWE groove would be a minimal cost compared to the compressor wheel.

[zstroken]

Originally Posted by Smokem

Pressing a slug into the bore to eliminate the MWE groove would be a minimal cost compared to the compressor wheel.

Perhaps, but it adds costs, wasn't that the point of the the protrusion rule was to reign in the HP because people are complaining out $$$. Then also don't you a compressor wheel that was designed to run with an MWE, and now have it not running with one? Which would then push to a billet wheel that was designed to run without an MWE which once again adds costs?

A cast compressor wheel should be had for less than $200, Machining the cover, and pressing in a slug will run in the $100 range, depending on the machine shop etc, some more some less.

[ABI MOTORSPORT]

Originally Posted by Smokem

Pressing a slug into the bore to eliminate the MWE groove would be a minimal cost compared to the compressor wheel.

but if the groove is where it is suppose to be (not in front of the wheel) that would not work.

[zstroken]

Originally Posted by ABI MOTORSPORT

but if the groove is where it is suppose to be (not in front of the wheel) that would not work.

My thoughts also, I was assuming he meant over bore the factory bore, and press in a sleeve to cover it up.

[Smokem]

Originally Posted by zstroken

Perhaps, but it adds costs, wasn't that the point of the the protrusion rule was to reign in the HP because people are complaining out $$$.

The only cheap alternative is the restrictor plate.

Originally Posted by ABI MOTORSPORT

but if the groove is where it is suppose to be (not in front of the wheel) that would not work.

It can still be removed.

You are opening a whole different can of worms when you start to talk about requesting a certain location for the MWE groove. Like I stated before, if you do this, both race covers for the S300 and S400 will not be allowed.

[zstroken]

Originally Posted by Smokem

It can still be removed.

You are opening a whole different can of worms when you start to talk about requesting a certain location for the MWE groove. Like I stated before, if you do this, both race covers for the S300 and S400 will not be allowed.

Locate the MWE basically behind the tips of the compressor wheel.


I am unfamiliar with the MWE on the s300 race cover. What about them makes them not allowed?

[Smokem]

The MWE groove on both race covers is located in front of the compressor wheel. So those with these covers would need to alter them or replace them to relocate the MWE groove, again, additional cost. Slick covers have been used in tractor classes for years with good luck.

[Sledpuller]

I would be more inclined to adapt to Ohios 2.6 rules as they nearly have more 2.6 trucks than the rest of the states put together- and the main club does not sell turbos.

[zstroken]

Originally Posted by Smokem

The MWE groove on both race covers is located in front of the compressor wheel.

Not the s400 race covers I have seen. Are you referring to the bullseye ones?

[zstroken]

Here is a picture from bullseyes website.

Bullseye Power Turbos

MWE is behind the tips correct?

[Smokem]

Originally Posted by zstroken

MWE is behind the tips correct?

Yes. However the following is a BW cover.

[zstroken]

Originally Posted by Smokem

Yes. However the following is a BW cover.

That appears to be an ETR 11 bladed wheel, that doesn't have a splitter blade. So if you require the MWE to be behind the tips of the wheel, that wheel/cover is not legal.

That is not the OEM location I have seen the s400 MWE in Borg Warner race covers. It is behind the wheel.

[Smokem]

Let me just say this, 40hp was found by the area behind the wheel, not in front of the wheel.

[zstroken]

Originally Posted by Smokem

Let me just say this, 40hp was found by the area behind the wheel, not in front of the wheel.

I am not disagreeing with the HP. You made the comment about s400 and s300 race covers would not be legal saying that the MWE groove was in front of the wheel. Not in any of the BW race cover s400's that I have seen.

I am saying do the protrusion this year, then a few years down the road reevaluate.
Outlawing the MWE just pretty much locked in the billet wheels being on top. Which puts at least $500 into the cost of a turbo.

[Smokem]

Depends on the wheel used. But the thought process is backwards as far as the hp relative to the MWE location. If you wanted to lower the power output, move the MWE groove in front of the compressor wheel. Like I said, debating the location of said MWE groove is a whole different can of worms.

By now simplicity should have won out, restrictor plate or no MWE.

[mech2161]

For the expense the rule will cost and the fact it will not limit power to any extent don't do it.

[zstroken]

Originally Posted by Smokem

Depends on the wheel used. But the thought process is backwards as far as the hp relative to the MWE location. If you wanted to lower the power output, move the MWE groove in front of the compressor wheel. Like I said, debating the location of said MWE groove is a whole different can of worms.

By now simplicity should have won out, restrictor plate or no MWE.

I am still havent seen the OEM applications that have the MWE in front of the wheel? If they are they are probably applications that don't have the splitter blades etc, or they aren't even an MWE, just a misuse of the term?
Isn't the whole idea of the MWE to move the line on the curve? I am not seeing why an OEM would place the MWE in front of the wheel. I could be wrong, I am sure there are some oddball applications that might allow this.

My guess the folks having the MWE in front of the wheel is they have a non removable bushing. They are allowing more air into the wheel other than the 2.6" opening.

Put the MWE behind the tips, let them open the MWE up, limit it to a t4 turbine housing, and call it good. There will come a point when you can't get the air to the turbine so you will only be able to pump so much air.

[Smokem]

Originally Posted by zstroken

Put the MWE behind the tips, let them open the MWE up.

I just don't understand why people are concerned about limiting the location, when and if it were in front of the wheel it would make less power? If it is prohibited, it is one less thing to worry about and tech.

[97' CTD]

Just make everyone buy the exact same turbo. then this pissing will go far far away.
Brandon