Wrong. On Eatons site they say a mild port/polish of specific areas will help improve the blowers (M62) performance slightly. Read the link below aka "simple search".

https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/eaton-superchargers-modification-guide-95307/

The TVS on the other hand should not be modified. It comes from the factory making peak performance, and if you were to port it, you would actually loose performance.

 

I am going to do a "slight" port on the outlet. The key to anything is moderation. I have seen some people open up the outlet all the way to the silencer holes... that is over kill.

And I don't see a problem with polishing the inlet to remove the casting lines and smooth things out.

 

agreed !!

 

Yeah nice numbers but you could see better results from a better tune
you should be up at 300hp atleast
i think ebristol and Area can help with some advice

 

you don't need to port the outlet at all. Maybe very mildly smooth it out. It's the inlet that could use some work. Do some research on the Kenne Bell Mammoth series. HINT: Mammoth doesn't mean a big blower.

 

Well ebristol I guess when you do this and dyno it you will be the only one with REAL DYNO PROVEN results as to whether or not it works.

 

I have heard you say that before. Would you care to explain or just drop in your .02c and leave?

The only thing I can come up with is that the inlet of the M62 gets smaller after the opening. Which would make sense. The TB is a circle and the inlet is more of an oval shape. So its possible the inlet has created a restriction after the TB and before the rotors.

Spoon feed me PLEASE!

 

Bigger inlet means more air. Open it up as much as possible all the way to the rotors. Pretty simple. Don't get too crazy with it though. A signifcant amount of material removed will help more than people would like to believe.

 

Makes sense.

Thanks

 

When are you porting it and going back to the dyno. I can't wait to see the results.

I think you would probably see better gains on that dyno with an electric exhaust cutout!

Think of it this way. Your blower is not compressing air its moving it. There for the REAL compressor in the whole setup is the engine! If we think of the engine as say a turbo. The less restriction the compressor has the more air it can compress. If you can't do anything with the heads then the next easiest thing would be the exhaust if you free up the exaust with say a cutout then the compressed air will have less heat due to restriction and the engine will flow better causing boost to drop. Then you put a smaller pulley on to get back to the same boost level you had before.

No matter what anyone says a cutout or open downpipe beats even a 3" exhaust any day!

Just my two cents!

Another quick question would be how is your intake setup. Are you actually using a filter or filter box before the supercharger. If that is the case then porting it will do nothing anyway because it has to PULL air through a restriction! When I took the filter off of my sc inlet I literally gained 6 dyno proven hp without a tune! That was with the exhaust on! With the cutout you could be talking 15whp! Not to mention retuning it!

 

If you decide to try a cutout I have one I can send to you Eb, or I guess you could just unbolt the catback lol

 

I have considered it. But I have ridden in a Cobalt with a cut-out. IT is LOUD!

The RL intake is different then the Cobalt. I am under the belief that the stock Intake is better then the K&N CAI.

Although the stocker is molded plastic it is almost 3.25" in diameter throughout the whole length. The K&N intake is approximately 2.75" and actually runs through the stock air box.

Also, the stock filter is huge compared to K&N Cone filter on the K&N CAI. Its like 33% bigger. Me and John Powell have done a lot of research on the Stock vs Aftermarket CAIs for the RL and we both feel the stocker is better with a K&N drop in filter.

We have a bunch on info posted on RLFs but I can't seem to access it right now.

But ZZP just released its TRUE 3" intake which requires the removal of the stock air box. But there is not enough information out on it yet.

If Zooomer would give me a $100 discount on the Intake I would dyno test it vs my Stock Intake.

That wont be necessary. A cut-out would probably help me break 300whp but I would never run one on the street. So it would not be fair to run one on a dyno.

Here is John's look at the stock RL Intake.

http://www.ionforums.com/forums/perf...tml#post860802

Here is some things I looked at with the air filters.

The K&N drop in Filter is:

Height: 7.25 in (184 mm)
Outside Diameter: 5.813 in (148 mm)

The K&N CAI cone filter is:

Height: 5.563 in (141 mm)
Top Outside Diameter: 5 in (127 mm)
Base Outside Diameter: 6 in (152 mm)

So the K&N drop filter has a total surface area of approx 42.14".

The K&N Cone filter has a total surface area of 30.59".

 

have pics of ur cut out on and all? im planning to get oone and need ideas on how/where to put it and wires and stuff

 

Ill post them up tomorrow rico

 

Ebristol if you have an electric cutout you only use it when you want to. It sounds normal with it shut.

Also what I am suggesting is to take the filter off completely when you dyno. If you have the cutout on and open it all the way and take off the filter you could gain up to 30whp.

It makes it so much easier for the supercharger to pull air in without that restriction at all!

Then you know what you are making in "race trim" so you only take off the filter when you race at the track or you race someone.

Trust me not have a filter on wont hurt anything! You have a supercharger on there. I know some people who had the supercharger intake very low to the ground with no filter and they drove like that for 60k miles with no issues.

I think you should try these simple things that way others can see the hp upgrades and choose to do them or not. You def have a unique chance to try some stuff here. Also take this guy up on his offer so we can see what the cutout does. You can close it after you see the hp upgrades, but we want to see what doing this stuff will do for you!

 

isn't the kb mammoth blower a 2.8L though? hahahah thats pretty big

 

turbulence across the maf via lack of a filter will do way more harm than good.

 

Do you have dyno proof of this Area or is this specualtion?

 

You don't need dyno proof. It's common knowledge that an air filter helps smooth out air flow/turbulence. Read the attached link below

http://www.knfilters.com/filter_facts.htm#WORD

 

You just sent me a link to an extremely biased article. Now I know what taking the filter off will do to my car and mustangs which use the maf as well. Ebristol this is a very easy teast take it off once for the dyno and see what happens. If it gains hp through the entire powerband then we know it works.

 

That is not a biased article at all. The article states facts that pertain to all types of filters. Like Area said, to dyno without a filter will do more harm then good. I will state what I said before .... Air filters are not on cars just to filter air. They are there to also reduce turbulence and straighten out the air flow. In the end, Ebristol will more than likely loose some horsepower if he were to take the air filter off.

 

it's a big blower, but there are much bigger out there, and the 2.8 mammoth outperforms a large majority of them.

 

If what you are saying is correct then why have I dynoed a 6+whp gain over the entire powerband with JUST taking off the filter. Why do mustang owners do it and gain over having it on.

Why do Drag cars (supercharged and turboed) not have air filters if air filters "help" with performance over not having them.

I'll ask you a logical question and you give me an answer, is an air filter a restriction to the intake. This question takes out of consideration turbulence blah blah.

Second question. Why would a roots type supercharger need for there to be less (probably 1/4 less) air that is "smooth" than for it to have more "turbulent" air.

I'm not trying to start an arguement, but I want REAL answers from you guys not canned articles to a FILTER seller's website.

Also what happens if ebristol tries it out and gain hp. would you come in here and edit your posts because the are wrong?

 

No, I would not, but I highly doubt he will. I guess we shall see if he decides to take your advice. If he did end up gaining horsepower, that gain would not be of any use to him, because he would not be able to go drive around without a filter. If I'm wrong, along with some other knowledgeable members on here, cudos to you sir. I'm not trying to start an argument either.

 

Just read your article in it's entirety this is what a think you were referring to.

"Straight cut velocity stacks, for example, pose a unique problem. Exposed to the outside air, velocity stacks experience a phenomena that actually hinders performance at high speed. We are referring to stacks and air horns that protrude through the hood and extend into the air stream so the direction of the air rushing over the car is at a perpendicular angle to the length of the tube.

Air moving rapidly over these stacks create turbulence inside the opening. At high speed, the rushing air tends to create a partial vacuum inside the tube. The condition is counterproductive to air flow. The phenomena also effects open carburetors. The higher the ground speed, the greater the problem. Vacuum created by the engine is trying to coax air into the cylinders and the high speed air flowing over the open end of the stack is causing resistance."

That has nothing to do with what we are talking about. A supercharger is PULLING air through much greater than engine vacuum for one. Two this is referring to open air "velocity stacks" which is has nothing to do with this either.

In taking the filter out you are simply allowing the supercharger to breath better and create less heat. It's the same concept as haveing a cutout or bigger exhaust on the back end. You are helping the engine and supercharger breath. That is all.

IT WORKS TRUST ME!