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Discussion Starter · #1 ·
hey all,

I'm assembling the parts neccessary to adapt a super from a '96 Mazda Milennia S to breathe some fire into my EGT, and I just wanted to know if anyone else has gone this route instead of using the Eaton M45 super. Any info would be greatly appreciated.

Thanks,
Ollie


P.S.- does anyone know if the factory fuel pump and/or injectors have enough flow/pressure for this? I have a '94 EGT pretty much stock except for a butterfly valve mod on the intake manifold. Again, thanks for any info!
 

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The fuel pump is good for a little boost...depend of the specs of your supercharger...personnally i dont know that supercharger so i can't help...

Guess if your going after high numbers of boost you'll need to get bigger injectors and a wallbro fuel pump.... aint sure tho...need more info on your supercharger setup
I have never seen an EGT with a supercharger too...this sounds real kewl
 

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Discussion Starter · #4 ·
Yeah, I actually got in touch with that one other guy that did it. He told me he scanvenged an Eaton m45, and he said it bolted right up in the a/c compressor bracket. I can't remember the guy's name for the life of me, but he said he was getting about ~160 hp at the crank at 7 lbs. using that setup. I don't remember if he had it intercooled or not. But that sounds about on par with a gtx at about the same boost.

That particular 'charger seemed impossible to find, and the guy that used it said you could yank one off a mercedes (yeah, lots of them lyin' around in the junkyard) or some other small displacement, factory supercharged car. I was actually looking on ebay for it when I came across the other one. I think it'll definitely fit a lot nicer, but I'll have to make some special mounting brackets for it. I can squeeze it on to the belt somewhere and still keep the a/c in there hopefully.

Neuman, you've got a point there bro. I think with this combo, it'll probably work out to a similar cost. I'm going with the factory wastegate and bov (came from the same car) to start just to get everything running smoothly, then I'll work up the boost as I get it tweaked. This whole thing is sort of an experiment. I still have to research the 'charger more myself. However, Elektronikal, I might as well get the fuel pump anyway, it won't hurt to start.

heh heh heh, this whole idea is nuts, but it'll be fun to try it out. so much for staying n/a! [/img]
 

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The Miata had to have been at the wheels @ 12psi. I would assume rip's numbers are at the crank.
 

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drivinonthinice said:
The Miata had to have been at the wheels @ 12psi. I would assume rip's numbers are at the crank.
Yes, at the wheels. This is the one. But this Dyno does have a rep for giving low numbers.
 

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yeah the stock pump should be good to around 200hp. But if you run the stock injectors you'll need to increase the fuel pressure, like with the use of a FMU. OR keep the stock fuel pressure, but increse the size of injectors, this will require some thing to control them, like a stand alone, AFC..ect
 

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Discussion Starter · #10 ·
That's who it was, rip! It was last year when I talked to him about it, so don't take my numbers as the gospel truth, that's just what I seem to remember hearing. Yeah, Rip seemed to have it all figured out for using the m45 super.

I decided to pay a trip to the old junkyard today and scavenge a set of injectors from an old 626 w/the 2.2L B engine in there. I figure for a 10 bucks, it doesn't really matter if they work or not. Just a hunch though.

I think I figured out where I'm going to mount the super. I'm going to have to fabricate a bracket to come off of the a/c compressor bracket. The only question is clearance with the header, and we'll see how that goes. As of now, I MIGHT have to scooch the radiator over a few centimeters too. Shouldn't be too bad. Otherwise, syonara, air conditioning.
 

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If you don't lose the A/C, have fun finding a belt that fits. :?
 

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Discussion Starter · #13 ·
the super is now officially mine, and I'm awaiting its arrival from Cali now. :D ebay is a beautiful thing. when the wastegate and bov arrive, the real fun begins. fabrication of the new brackets and piping flanges. good times. christmas is gonna rock this year!

i don't think I'm going to worry too much about the belt thing. i just need to get something closer enough to the right size, then I can add a tensioner pulley or adjust the bracket itself. have some faith drivin, I'm an engineer. :wink: I want the boost bad enough, so i'll find a way!

BP + super = 8O heh heh heh!!!
 

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Ok, a couple of dumb questions while we are on this topic.... what is the maximum compression ratio one would want in order to safely run say 7psi off of a supercharger... I'm currently assembling a 2.0L/1.9L/zetec/svt hyrbid engine for my 1999 Escort sedan... and well supercharging for how much it does, and/or how much more expspensive it is as compared to turbo'ing it seems, well, cool! Also would a supercharger perhaps be able to be mounted where my no longer existant A/C compressor use to be? either way, cheers for your progress!
 

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You could but it's not nearly as efficient as a turbo setup. Also to hit your 300hp goal I'm not sure it's feasible to get a blower that will move that kind of air and still fit where your a/c compressor used to be.
 

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yeah... i wanted to mention that all this talk of 160 whp off 7psi... that is really for the most part all your going to get from it though... where as with a turbo we have guys rollin around the streets on 15psi... and turbos are SO much cheaper so you will spend more for less or less for more... hum
 

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Discussion Starter · #18 ·
You know, I think I'm going to explain why I chose to do the supercharger thing. I don't knock turbos in the least, but I'm only trying it because I got a super designed to run 6 lbs. for a 2.3L v6 :idea:, which in theory, should generate enough pressure/rpm to be efficient across more of the powerband of the BP.

my theory:
bigger rotors=more volume @ less rpm = more pressure with less rpm, and hopefully a somewhat linear pressure increase in the powerband

I expect a better lower-end power, but not anything amazing across the 3500-6000 rpm band. maybe 50-55hp when everything's done and tweaked-out on a stock head? who knows, we'll see.

But this isn't neccesarily going to be easy to do. Especially since I'm gonna try to keep my a/c. I'm going to try to make a bracket to mount the 'charger over the a/c compressor, but up higher, almost so the top is even with the valve cover deck. If I mount it there, I can get a larger belt to go from the crank, a/c, and the charger. I'll have to make a tensioner, to put more of the belt surface around the charger pulley, and not worry about slipping. The only issue will possibly be clearance with the radiator, but scooting that over a little bit isn't as bad as it seems. I also predict a heat shield between the top of the header and the bottom of the charger housing. After I get the super mounted, I'll have to somehow figure out the piping, but that's another problem for another day.

This thing is going to get here on Friday, and then the fun really begins. You know, the engine compartment is going to look really wierd when this is done!
 

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Discussion Starter · #19 ·
Just cruisin through the forums today and had this thought.

I suppose the real question will be whether or not the mechanical loss from the charger is small enough relative to the amount of mechanical gain at the crank to be worth it. Given the smaller rotational diameter of the impeller assemblies, and smaller diameter path they must follow, I'm theorizing that this super's gonna work because of its lower internal rotional inertias. So basically I'm banking that long and and skinny impellers is better than short fat ones in this case. (As long as the impellers aren't TOO long)

I'm also thinking that if clearance is going to be too much of an issue, I'm going to wait about 6 mos., go buy an LX for a daily driver and go all out on the EGT (definitely minus the a/c).
 

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If it's mounted above the A/C compressor about level with the valve cover you may have problems with heat soak from the header even with a sheild. I would suggest getting heat wrap and wrapping the header to lower the temps the super will see. It'll also lower the under hood temps which is always a good thing. :wink:
 
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