digitalsolo

iTrader: (2)

Those ideas sound good. Though I know my supercharger doesn't have bad seals... actually there are no seals to fail. Some amount of wear and all, but it's still well within spec (just had it apart for a cleaning last week. ) Perhaps the differences I'm seeing are due to it being on a piston engine instead of a rotary?

vectorminds

Maybe, but I wouldnt see why.... If someone would like to step in and clarify that would be good. But it makes sense to me that the engine is going to draw in the same volume of air for every revolution, nomater if its a rotary or a piston engine...

deadRX7Conv

I say go for it and share your experience.

Eaton boosted torque plus rotary high winding RPM.

Anyone make a guess on what will break 1st?
The boosted NA?
The Eaton at 8k engine rpm?

rotarygod

iTrader: (1)

You are getting more boost as the rpms rise due to blowby around the rotors of the supercharger. You shouldn't be getting a huge increase though. Maybe a couple of psi but nothing like how a centrifugal rises. If you put a smaller pulley on then the supercharger spins faster per every revolution of the engine than it did before so boost is greater. You will still suffer from the efficiency problems of the roots style superchargers though (blowby). Understand that a roots supercharger is only about 35% or so efficient due to blowby and charge air heating. The number isn't a constant though. A screw type of positive displacement supercharger can approach 80% efficient which is right up there with a turbo. You would have the benefits of a roots style but with higher efficiency. Power is still robbed off the crank though.

mazdized

Super charging is a waste of time in my opinion. I had one of those Camden blower on a bridge port, stock TII motor, and a six port all of which really were not that impressive on power. With the six port it would just ping and ping when boost was above 8psi. I think it was just too inefficient and taking too much torque away from the motor itself to drive it. I mean with 7-8 pounds of boost it did not feel like 7-8 pounds on a turbo motor. Another thing what ever power claim the manufacture has is one thing but how long would the charger last is another. Mine blew up at Sears Point after a morning worth of track time, the charger simply just let go on road race environment. It seemed to me that a well carburated street port will out do a super charged stock motor.

vectorminds

well, overall im not looking to spend too much money, my engine is still good and should have a lot of life left in it (85k on it right now).... so im thinking for like 400 bucks, plus some time fabbing up a bracket, belt drive, and tubing and i could have like another 50 hp to play with using very conservative amounts of boost. and best of all it will be all there almost right off of idle.

Wankelpowered7

well, I have a lot of time and research into using an eaton m62 blower on an N/A. I been working on my project for about 6 months. For those jerks that like to say it is a waste of time and stupid, well you are probably the ones that flip the burgers and never even make manager at your local Mcdonalds. I mean dang can we get a little encouragment. I am sure that Wankel was laughed at a couple of times but you are driving on his designs and concept. I will post some pics and progress soon. I am very close to success. Oh, and I am not doing this project because I cant afford a turbo I just want to do it because I can.

vectorminds

Wankelpowered7, that project sounds awsome... definately post up some pics... and you think you are gonna be able to make it to the dyno soon?

And I agree with you, there are certainly crazier ideas than supercharging an N/A on this forum... i mean Paxton and Atkins have made / do make kits to do this... so its not a supid idea... just that their kits are a lot of money

von

Then get it if you like it so much. Turbos can have full boost at 2500rpms.. Have you ever driven a stock running one? Id get the turbo. And its super simple. Can install another turbo in an hour pluss thier only 250$ for a j-spec turbo over the forum. Dont see what you dont like about that.

Phu5ion

Wankelpowered7, I'd be very interested in hearing more about your Eaton SC project. I've been toying around with the idea of how to fab. a bracket to mount the 'charger. I'd definately like to see what you've come up with.

digitalsolo

iTrader: (2)

If you're looking for an M90, the ones off of older Ford Thunderbird Super Coupes had an integral intercooler type thing on some years. The S/C isn't quite as efficient as the GM model, but I think it'd be easier to fab brackets for, because of the way it's mounted.

vectorminds

yeah, those can be had really cheap on ebay, thats whats making this project look so apealing.. but if anyone has figured out the mounting definately post up what you did

Wankelpowered7

ATTN EVERYONE : i am not doing some supercharger swap. hell that was not even me typing. someone has stolen my log in information and has been using it.

To the *** who has been using my name.. i will hunt you down and hang you by your toes and break both of your knees, wrists and brreak all you finger individually.

1987RX7guy

iTrader: (3)

Mint87RX7

So Atkins makes a full supercharger kit for a gen 2 rx7? and it can handle 8000 rpm and not destroy my rotarty? If this is true and I have the $3000 for it then it would be worth the money. any coments would be helpfull.

Mint87RX7

Adding to my question, even if it cant handle 8k and i can only rev to 6k would it still be worth it to supercharge using atkins kit?

theonlygreat

http://www.atkinsrotary.com/supercha.htm

check it there.

BDoty311

I am currently contimplating fabricating a Eaton Supercharger, probably a Supercoupe charger or a GTP charger. Can you help me out with a few questions?:

How much boost should I run? I was thinking about 6 lbs max, or should I go more for it to be worth it?

Is the stock cooling system going to hold up after a supercharger is added, or should I upgrade my radiator aswell?

What would be the best way to tune the fuel? Get TII injectors and an S-AFC? Will I need the fuel pump aswell?

Thanks for the help guys

mazdized

I was flipping my burgers and thought how is your super charging project coming along? I actually drove a 86 with stock injection and an Atkin's super charger on it with the Atikin's guy personally handing the keys to me. Well he had a dyno chart that is laminated showing a whopping 160HP, and boy it sure drove like a 160 hp FC too. Well I better go back to flipping burgers so I can save up $$$ so I can buy a charger that will gave me the dyno shattering 160 hp.

Chimeron

I'm seeing you saying that getting a supercharger would be inexpensive because you can find one pretty cheap and fab some pipes. I agree with that, but what about other concers? Do you already have an aftermarket unit controlling fuel and such? I would like some more power but wouldn't putting a supercharger alone on be bad? I'm sure I missed something because I like the idea of a supercharger but would worry about killing my engine from collateral problems.

was that dyno rwhp or fwhp?? makes a big difference.

Chimeron

bumpity bump, really want an answer here.

I'm just curious what kind of upgrades are required other than the supercharger itself.

RoninAutoBoX

You will wreck your N/A drivetrain. For the money, just find T2 stuff. I have been back and forth on this idea a million times, and while a T2 conversion may not be as cheap, it is more effetive, has a ton more potential, and a better value.

If you own a fab or machine shop, you will get your money's worth. if you do not, then just start flushing the Benjamins down the toilet right now.

skydivr73

not true---if you look up info on the Eaton website--the company that makes the M90 units that Ford and GM use---you will find that the M90 can spin safely to 13K or 14K rpm......you would still hafta get the pulley size right to avoid overspeeding the charger, but I am looking to do the same thing.....already have a spare M90 with IC and piping from a T-Bird SC. Just need some custom fab work done and a whole lot of testing but havent had the time at all lately to even start.

AFSOC_Commando

I say to all the guys who want to Supercharge, GO FOR IT!!!

I think it is awesome you want to do something CUSTOM instead f the I'll just buy the J-spec or TII already assembled.

Inovation is what made this country what it is.

I myself am going J-spec.... Why? Because it was cheap and fast and my engine is seized.

There was a guy on here who did supercharge his Rex

Here are a few links to what some guys did....

http://www.geocities.com/boatseason/rx7.html


http://pbgarrott.tripod.com/Garrott.html


I just love how any time a member here mentions modding an N/A the first thing some of these TII guys do is say "sell it and buy a TII" I happen to like my LIGHT WEIGHT SE without all the power options, moonroof, rear wiper and added weight.

Best of luck to you guys who do mod your own Rex's....

mrmasda

Why does everyone want to push their intake choice? Be glad we have choices and try to help each other get the most power from their rotor. I have a 4port 13b atkins superchager 5" water injected 650cfm mech holley(www.tpcracing.com) boost referenced 9lbs boost in an RX2 and after 3 yrs with my msd rev limiter set at 7600 I still have great torque and instant response. Yes turbos put out more horsepower and they are technically current but they are not for everyone. Enjoy our rotors and like our motors DO NOT be afraid to be different revel in it.