omg guys. this is how it works. if your blowing air into a baloon and your measuring the air pressure in your mouth, then it is possible to have high psi while not inflating the baloon if there is no air flow. if the baloon is inflating (the air starts to flow) the psi will drop but your actually doing something. cfm is all that matters.

 

I'd guess it's around $500 to do, give or take 100 to 200 (but can't see it less than 400). I can't wait to see your gains. Dyno your car now and dyno it after you get it ported.

 

An engine is neither a baloon or a metal box

There are more variables here.

1. As pressure and Volume Rise, more air is being consumed by the engine.

2. The S/C is pushing more air against the engine and its consuming more.








Ok, Here it is, In The Real World with what is being suggested, the stock S/C is being cleaned up a bit. Where the screws are cant be polished because there would be a loss of material and therefore, compressor blow by. So all that can be polished in the in and Out...

. IMO you will not see any diference at all in the pressure or even on the Dyno.

Agreed?

Any change that is made will probably be less of a diference as cleaning the air filter..

 

im sorry, but porting your blower will be a big waste of time. You guys have the newest gen sc from eaton. There is only 5-7% more efficiency that you will be able to get by porting your blower in certain areas. If you go too big on the outlet you will loose efficiency. If youre shop knows what theyre doing, they should have a supercharger dyno. It can measure the oulet temps of a blower and many other things. the only people i know that have one is zzperformance in grand rapids, michigan. Good luck getting maybe 1-2 HP from the outlet (inlet you may actually get a few more HP if you port match it to the TB) but the outlet wont gain you anything, maybe even lost some HP. I would put the money into some cams or something else.

 

you can contact "colin" on redline forums, he has done pretty much everything to the LSJ.....nitrous, ported blower, psi-fi, hes thrown it all on his car at one time or another, hes back at pretty much stock now, for idk why lol//his family owns like 5 redlines, so im assuming the goodies are spread out between them, who knows? you on here colin? could you shed some on the ported blower?

 

so it's impossible that the cobras are pulling around 40+ hp from blower porting with the new 4th generation m112's?

and 5-7% is alot when you talk about effeciency... hell take 7% more effeciency on the engine's output form my last dyno and i'll have 15 whp on a mustang dyno.... blower porting isn't made to improve performance by a crazy amount, but it definitely helps

 

exactly what i said. Boost will stay the same on a turbo and increase cfm. On a supercharger it will increase both because psi isnt regulated the same as a turbo.

 

porting a 4th gen, yes you would see gains, a 5th gen (like you have) no you probably wouldnt. And you would only see that 5-7% if you absolutly knew what you were doing with Eaton. The 5-7% came straight from an Eaton engineer too. Im willing to be that the shop youre taking it to probably doesnt do a lot of gen 5 blowers or has even done one. porting a gen 3/4 is good because the design can be greatly improved upon, but not on a gen 5. One company tried to port a gen 5, but it on their car, and have heard no results since. Im sure if they had some sort of gains they wouldve screamed it from the ceilings, but alas nothing. Good luck though, and I hope you prove me wrong

 

Here is some Physics.

Known #1. The Cylinder Wall will not Expand, therefore the displacement will not change.
Known #2. You Cant add more volume to the cylinder without a higher pressure.
Known #3. If the Compressor is making more Volume, it is must also making more pressure. (See #2)
Known #4. The Ported compressor can make the same Volume and pressure at the same RPM with less heat.

You can't push more air into an engine without pushing harder.. The Cylinder will simply not give place for the volume so, if you want more volume, you have to raise the Pressure.

The Consept that a more effecient Compressor can cram more volume into a cylinder at less Pressure is simply HORSESHIT!

 

That's what I was thinking too.

As for the ECU, yu will probably gain a little because of the cooler air, but any PSI gains the bypass valve will dump without the ECU reflash. And it will probably throw a lean code as well. Essentially you are taking the free flow idea of a CAI to the next level.

 

where are you getting it ported ? Stegi ?

 

i'm going to release all the info on it at once, after everything has been done such as power gains, pricing and shop info

 

Send me a pm then....

 

Wow this thread is just turning stupid.

Anyways, I think there are some gains to be made here. But these are pretty new design blowers, so there won't be alot. Bottom line, no one knows till its tried and proven with dyno numbers. So lets all stop bench racing as to whether it will or will not help.

Second, yes in porting the blower you usually lose boost, but make more power. Like said above, think of it like a garden hose. You can restrict it, and make lots of psi, but not flow to much. Or open it up and make very little psi, but move tons of air.

You can throw all the theories out you want, but its proven, do some research.

Boyle's Theory: Pressure 1 * Volume 1 = Pressure 2 * Volume 2

So if you have 15psi at 500cfm, then port it to flow 700cfm, the pressure will have to lower. Thats physics, period.

 

If the bottleneck is the compressor (inlet or outlet) or the intake manifold or cylinder head, then it might be possible that you could get more air into the cylinder without raising the pressure.

The PRO FWD ecotec cavy is a good example

 

LOL
Based from all of your "writeups" I thought that you would know better than that man. I thought you were a turbo guy? If a compressor is more efficient, it works less to produce the same volume and PSI at a cooler temperature. Its all physics, which Im starting to think you're not as educated in as you like to think you are.
Also this statement is wrong...
The PEAK pressure wont change, but youll have to spin the turbo faster to make the same amount of boost and youll also push more volume because of that. If you push 10 psi through two straws of different size, which one is going to flow more CFM? Im gonna guess the larger straw. Im also gonna go out on a limb and say its going to require less PSI to flow the same CFM in the larger straw. But Im just a n00b what do I know

 

this is confusing as ****........

 

Dont listen to much of what Brian has to say because it appears as though he doesnt know as much as wants people to think. I pointed out two mistakes of his right up there as you can see, and I've seen a few more mistakes around. What exactly are you confused about, and hopefully we can help you understand whatever it is

 

basically i'm getting bigger holes cut into my blower to see if it makes more power

that's the simplified version of this 3 page long thread

 

You are too quick to judge.. This should be a fourm, not a **** flinging contest... We are not apes in a cage. Can we keep it like that.


Ok Here it is...

What you aren't taking into account is this. You are talking of the compressor by itself. I'm talking of the compressor and how it interacts with the engine. (More Relevant to the situation)

Who cares how the supercharger acts on a Coffee table... I'm more concerned with the physics as it is used on an engine. The Engine brings its own variables into the physics that must be considered.

We are both correct in our "Models" just I'm talking about the compressor working to compress a set of cylinders and you are just breaking down the compressors efficiency.

Your model of the straw only works on the Coffee table; when there is nothing on the end of the straw.

Let’s say you have the same size hole on the end of two differently sized straws.

What would happen to your Volume at the same pressure?

Would they not both flow the same volume regardless of the size of the straw?

For one second let’s isolate Pressure and Volume, heat and charge air density will come into later. Let’s just focus on Pressure and Volume here.

The Hole is the engine; the engine will only take as much volume as it can base on the RPM and Displacement, Cubic Feet per Minute Based on RPM. Based on the pressure that is being fed into it and the speed of the engine, it will consume a certain Volume. That volume if it is to increase must have more pressure behind it. Do you understand why I say that you are correct, but that the model is incomplete?

You can’t fit a volume of 100 Cu Ft into a 50 Cu Ft room unless it's under pressure.
If you want to increase the volume to 110 Cu Ft in that same room, you have to increase the pressure, pump more air in. The Room is the Cylinder, The Cylinder does not change.

You can't separate Volume and Pressure in an engine they are joined at the hip.
You can on a coffee table Bench Test and isolate different qualities of each different superchargers, but I don't care about coffee tables.
I care about the Engine Compartment.

As you know, that is why we select a Supercharger to fit the requirements of the engine based on calculation of how much an Engine will consume based on RPM and Displacement.

If you change the efficiency of the supercharger and reduce the temperature and increase the density, you will get more HP because the air is colder, but to get the same “Volume” of Air, The “Pressure” Cant be lower, it’s impossible.

 

Please Stop.

 

I'm behind you Brian MP5T. I've been thinking the same thing fo a while now, just didn't think anyone would back up my logic.

 

Thanks, I like a good debate. I have had this one before.

My Bud P7X and I have been looking into his SS and I'm pumped about how much power potential is in that car.

 

*sigh* I'll just say ok and leave it be.

 

Now, tell me if you are just stopping, or does it make sense. Because We learn from each other, I really do want your input...