I am not real familiar with how the roots type blowers work. Do they replace the intake, or just upper intake, or what?
I have a 4v Mark VIII motor swap in the works for my 97 GT. What exactly would be involved in mating an Eaton M112 (stock 03/04 Cobra blower) to my application? I've heard they'll mount to any of the 4v DOHC.
I found a 96-98 Cobra intake for pretty cheap but I haven't bought it yet. If I went the Eaton route, I wouldn't need that intake right? If thats true, what other parts/adapters would I need?

And before everyone tells me this blower isn't worth much, I realize that the power gains would not be a ton. But that is okay. I I have a relatively stock 4v from a Mark VIII. I am looking for just under 400hp and trying to keep boost under control. Not to mention the tight budget I am on...

I've seen some Eatons that came from Lightnings. Would these work too?

 

Those types of blowers replace the intake manifold and plenum.
Not sure as to the rest of your questions though, I don't have any experience with that.

 

I think you need a intake manifold from a 03 04 " supercharged" cobra not a 96 98.??? What year mark VIII motor is it?

 

Roots superchargers replace the intake manifold and generate peak boost at low RPMs. It works by having two counter-rotational lobes spin, trapping air between them and forcing it through the compressor. Roots and twin screw blowers are the most efficient superchargers available because of simplicity. The problem with these though is that they generate massive amounts of heat and heat is an enemy of HP. Also, because they seem to peak out so quick, without an aid to help cool the boost down, the boost will just be flat at the upper RPMs with no noticeable difference in gain between 3000 RPMs and 5000 RPMs.

 

Its a '94 Mark VIII motor..
A low mileage eaton can be found pretty cheap. Im thinking just a budget blower with pretty low boost to keep the stock components within their limits. I've heard that these specific 4v motors are similar to the 99+ 2v in the low end response, but pull so much harder all the way up to 6500rpm.

I also just thought about where my alternator is located. It is on the top and front of the motor..? Is there a relocation kit so there can be a blower there??

 

If you go back to the main topic page there is a section devoted to " 03 eaton on 2V " It might have some of your answers.

 

yea.. I read through that earlier. I thought it was only referring to the Eaton on a 2v. I'll check through it again..

 

Well, if it turns out that the heads from the 94 4V are the same heads used on the 03/04 4V that you would need the entire intake manifold from a supercharged 4V 4.6L. I guessing.

 

You have just contradicted yourself in your own post. How can it be the most efficent blower system and yet generate massive amounts of heat?

Also, roots and twin screw have little to do with each other. A roots will start to fall off up top, a properly sized twin screw will not, and a properly sized twin is ALOT more efficent than anything a junk roots can throw out.

The bigger output twin screws generally come with a intercooler (heat exchanger), so heat buildup is much less of a problem. This however does make the install more complicated, as you need an exchanger, fluid resivour, and pump etc etc.

 

this was covered in one of the first posts. hes wanting an eaton swap...it REPLACES the entire intake manifold...he doesnt need one. if he was getting a centri blower yeah he would need one...but not with a roots.