pyscho7

So currently i am about to buy the atkins rebuild kit and do a aggressive street port on it. besides that i have 720 secondaries, safc, 3" dp, rb catback, no cats, no emissions for that matter, and no ac or ps, i will have a heavy clutch, intercooler, also.

i just possibly came across a rotax seadoo jet ski supercharger from a 1800cc fuel injected model, fully rebuilt, from the factory they were set stock to create 8 or 10 psi.

my question is has anyone run a small supercharger on their rx7 and a turbo, say 2-5 psi on a supercharger, and run a factory or aftermarket turbo along with it. to help the torque curve? would it be a bad idea to get a pulley machined for that supercharger and put it on their?

i am not looking for anything over 350hp ever. i just want a stout ride, and i love to experiment with alternative setups.

or should i just give my dad the supercharge so he can put it on the 1st gen miata we have so i can race him, i am sure that will do fine on the miata

sharingan 19

iTrader: (16)

I think a twin charged fc would be cool. That being said I am not familiar w/ what it would take to make that setup work.

But if u could get it to run smoothly that would make fore one quick 7

Evil Aviator

Is that the supercharger for the Rotax 4-stroke 3-cylinder 4-TEC 1494cc engine?

Boostmaniac

I am not going to flame you so please take this constructively. This is one of the most horrid ideas and it is going to cost you WAYYYYYYY more than it could ever be worth.

If you want stout, build a fast spooling TII motor or pick up one of the superchargers MADE for the 13b. Hell, even combine the two, but don't do this.

Aaron Cake

iTrader: (1)

Sounds like it's way too small. These engines have no issues spooling full frame T4 turbos.

If you want fast spooling and 300HP, get a GT30R.

pyscho7

yea its the gtx supercharged model, 1494cc. i just dont want to throw the supercharger away, need to find an application for it. it should see about 8 or 10 psi on that engine from the factory. i mean FREE fully rebuilt supercharger.

i know the rotary engines require a lot more air volume than something like a 3 or 4cyl, just didnt know if the idea was just to dumb. but i guess it is. i plan to run a larger turbo, i was thinking of a bnr stage 2.

that would still be neat if i can find something that would work well with it.

Evil Aviator

Yeah, that's way too small. Rotary engines cycle their entire displacement per output shaft revolution like 2-stroke piston engines, while 4-stroke piston engines only cycle half of their rated displacement. Therefore, ignoring volumetric efficiency, you would be trying to place a 747cc/rev engine's supercharger on a 1308cc/rev engine, which isn't going to work. Now, if the supercharger worked well on a 2-stroke 1494cc engine (1494cc/rev), that would be an excellent match for 13B engine, assuming both engines had similar rpm redlines.

It's not a dumb idea really. You just need a larger supercharger for that application. Also, I think the idea is rather complicated, and modern ball-bearing turbos spool so fast that I don't see much need for twin charging nowadays.

Sell it and put the money toward a nice turbocharger upgrade.

Aaron Cake

iTrader: (1)

Put it on a Geo Metro and win some bets...

SouthSideSlider

yea man trust me if you want throttle response go small single,SC, or N/A twincharger is far beyond most. i put some thought into this awhile back cause i have a supercharger for a 4.3L chevy V6 but it would be too much work to make it worth anything.