RixRotary7

Is there any way I could use a Paxon, Eaton, etc. supercharger? I have been trying to do a search on it, but no one has really posted anything about it. I wanted to turbocharge my car, but I don't want to go through the hassle of taking my headers off and doing a new exhaust system. Also, does anyone make a supercharger kit OTHER than atkins?

RixRotary7

Please, I need some help.

Directfreak

iTrader: (2)

No "kit" other than atkins. Look into the Procharger, it's basically a belt driven turbo, than doesn' take the size of a regular roots style supercharger.

I've always wondered if we could mount one where the A/C compressor goes on an FB. for a nice clean engine bay.

O 16581 72452 5

I was thinking the exact same thing DF... as soon as i get the money i'm trying it.

81Rex6port13b

hmmm i never heard of that supercharger thing befor. i just looked it up its an interesting concept.

heres there site if any one is interested.

click here

interesting.....

nlc1179

i am going to laugh when you blow up your engine with that supercharger. either go turbo or port.

Sterling

*******.

I've done numerous posts here gathering info for my Eaton M-90 / 12a project. All the mathwork is in the posts, as well as all questions you could think of.

The Eaton set-up will require ALOT of fabrication, but with the use of the bypass valve, it's a deal that can't be beat.

I have'nt gotten started yet, but this summer I'll take one of my spare engines and stand it, and build the unit on it before installation in the car.

I plan to use a large IC, water injection, one of my own modded Nikki carbs, (blow thru) and boost to 15 psi constant with the bypass valve controlled by mainfold pressure, but also controllable within the cockpit. This way I can run no boost at all (complete bypass), full boost all out (closed bypass), or partial.
The bypass usit operates on manifold vacuum, and is said (by Eaton) to have the blower taking only 3 HP to run while in bypass mode.

Bypass fully closed will have me at slightly less than 15psi @ 8kRPM. This is as fast as I want to drive the blower, and it's not overdriving it beyond it's rated hi RPM. (So 15psi is about all I can expect unless I choose to drive the **** out of the blower.)

At partial bypass, I'll be able to lower the boost, but because of the "controlled leak" of the bypass butterfly from within the drivers seat, I can set it, and boost will rise with engine RPM/load, making my engine behave like it's turbocharged.

Ehhh. I get the bestest of both worlds with the flick of a ****!

Perhaps as early as next year, I will begin production of the necessary braskets, aluminum carb box, and extra **** for a kit to offer. Buy supplies his own Eaton M-90 and IC and pipe.
The blower sits atop the engine (hood will close), alternator is moved to AC pump location (sorry- AC will have to go!), battery relocation is a must, ect.

It's a project even if someone machines all the brackets for you! (I'm lucky enough to have a milling machine.)

Jeff20B

iTrader: (13)

I'm lookin' forward to it.

Metallic_rock

I've seen people do the same thing with the Camden supercharger from atkins... they have a blow off valve type thingy (sorry, I'm not sure what to call it since it's on a supercharger) But, if you put a regulator on it, you can boost up to 15 psi or so like with the setup you are going for. I see no reason why you would blow up your engine doing this any more than you would with a turbo.

Gregs

arent the VORTECH superchargers belt drivin turbos? they look just like a turbo

http://www.vortechsuperchargers.com/images/kit.gif

-greg

Sterling

A centrafugal supercharger should be concidered in a catagory by itself, but more as a brother to the turbocharger.
Niether are positive displacement like a pump- they are "super fans" that just blow so hard that nothing backflows- like a mini computer fan on crystal meth. They rely on speed -in the range of 10s of thousands of RPM! (Superfast!)
But there is an obvious advantage of having the exhaust power the "blower" (in this case, turbo). I just don't see any advantage at all to a belt driven centrafugal supercharger at all.

The PD blowers like Lysolm screw, Roots, and a few vane types (even the airpump on a stock rex is a very well engineered vane type- take it apart- it's fun to learn how it works!); these are all air "pumps". They have to be because compared to the "super fan on meth" action of the turbo or centrafugal super, they move like big clunky elephants. They pretty much "thwap-thwap" the air into your engine. But the result is that it's creating ridiculous boost from the get-go.

Cetrafugals have to spool up to be effective. This is not such a terrible thing, and is no reason not to like them- certainly not a good enough arguement to ever say that superchargers are better. But- Only serious turbo people that really know what they are doing can mate the proper turbo and tune the turbo and engine so that the turbo spools up just the right speed to deliver perfect kick-*** boost just when the engine reaches the begining of its powerband.
Rarely do you find a production car that has been mated and tuned so well with its turbo that it will do this. Turbos and centrafugal superchargers need more attention to bring out their engines full potential.
PD supers don't (by comparison). The PD super will launch quicker and yeild more torque, but usually will be met and passed before the finish line by the turbo or centrafugal supered car.

I can't engineer a turbo to get that low end I want. Others do this with twin turbos, stuff like that.
But I do believe that I can slap on a ridiculously oversized PD on, over drive it (compared to engine mid RPM range needs), and regulate the boost to increase at the engine top end so I may get the low end torque, but the hi end boost I want.

Kill No Cone

iTrader: (6)

I have heard that the problem with belt driven blowers on rotaries is ecentric shaft flex and wear on the front bearing. My understanding is the front bearing just does not hold up well on the force of a big blower. I believ that Racing Beat did a good deal of work with blown rotaries.

best of luck!

Sterling

I've done some research into this, with RB and Dave Lemon of Mazdatrix being the biggest contributors of data. Apparently what happens with the roots blowers is the "thwap-thwap" vibration thing- the force against the E-shaft front bearing is pulsating.
I plan to run an idler pully off the E-shaft, and drive the blower remotely from that. The idler will absorb the vibration without transmitting to the E-shaft.
It's almost as simple a setup as the AC pump tensioner.

fatboy7

When do you think your going to have one on your car, Sterling? Like I said before, I'd love to see you succede. Just keep us informed

mperformance

I just installed a Powerdyne unit in an LT1 camaro and I must say it's a nice unit.

Powerdyne superchargers are silent. Looks like a big turbine but it's belt driven...

Sterlin your idea can work, go for it.

Sterling

My wife is gonna pop my firstborn out any second. Due date was yesterday.
Best laid plans of mice and men are often disrupted by the advent of family expansion.
I bought a first off a guy that had two, and also had just gotten rid of his racing rx-3. He used to have the fun life I wanted (racing his rx-3, playing with 7s, triple bay garage filled with rex parts, ect) but was giving it all up because he no longer had time because of his three kids.
I remember thinking how sad he looked as I towed off his last Rx-7. Kinda like the same look my dad gets when he talks about his old Healys that he sold only to so much regret it 20 years later.

I simply refuse to give up playing with my toys.

Narcisse91

That guy does NOT have his priorities straight.

Jeff20B

iTrader: (13)

My bro is tying the knot TODAY! You know what comes next...

Rx7carl

Pedestrian X

and your not at the wedding?!?