Sup people, I gotta 88 Rx non turbo wita 89 streetported engine. Only mods Ive done to the car is the streetporting, MSD ignition, switched from auto to stick (the first thing I did), and instead of using the stock fuel injectors I threw in a Dellorto Carb. My baby rips and now I wanna throw in a supercharger cause its more reliable than a turbo and all I can use is like 7 psi max. Would I get more power outta a turbo pushin 7 psi or supercharger pushin 7psi. These parts Im getting for a steal off a junkyard car all supercharging components with intercooler for $100! not including the mods I gotta do to get it on. I dont know what a turbos gonna run me tho. anybody got some info for me, maybe some tips on how to get the supercharger in there. Anything would help..Thanx alot

Jay

SC......... with NOS..........just a thought.........

um from what you say supercharging will be much cheaper, and i mean much cheaper, more power? cant really say depending on plenty of other things, keep in mind the low end gained with a supercharger is nowhere near as great as a turbo, in fact with turbo youll loose low end because of lag, while a supercharger boosts right off of idle, well almost , but in any case, its your choice, from what you tell me i would ge with the supercharger, but again thats my personal choice and not yours, ask yourself what your loooking for? low end power? top end power? or both?

for low end and both supercharger would be best, but turbo has more potential for top end(variying from size and other upgrades)

good luck and keep us posted

also on a side note, reliability will not differ from turbo to supercharger as they both provide boost (which is why the motor will be unreliable)

Honestly, I say go with the turbo.. I mean hell, if mazda wanted the RX-7 to be supercharged, they would've made it like that.. but I guess it depends on how much money you want to spend.. if you can get these supercharger parts so cheap (in fairly good condition) then go with that if that's what you want.. if not, go with the turbo.. and about the 7psi.. well I guess it all depends on what kind of supercharger or turbocharger you're comparing.. https://www.nopistons.com/forums/pub...1047683561.gif

I would also go turbo. Remember Boost is free power and works off your exhaust. Superchargers work off the power already created by your motor. I think the greater gain would be with a turbo. And probably cheaper although I don't really know of the cost on a Rx-7 supercharger.

Supercharge it now then add a turbo later to twin charge it.. Is the setup you are getting from a rotary engine? or just some ol supercharger? If so it may be hard and even costly to fabricate the stuff nedded to get it to work..

supercharger got 40k on it I would say its in good shape. And chainsstreroids, why would the engine be unrelaible? If I stay 7psi on the blower the engine will run fine. I think it will help my engine being I like to punch it alot. the driver has alot to do with an unreliable engine. Anyone know an exact list of things I need to don this?And how exactly is this system routed?Thanx. Ill be having pics when I put a kit on. I found a honda prelude that was stolen n stripped but still had the kit, took that **** and with a little fiberglass fixed little cracks. Mod looks easy just gonna cut the top curve of front bumper of my rx measure and mount spoiler kit. Should be done by May.

your putting a prelude kit on your 7?

Is it a roots type blower? If it is dont bother with it. Roots blowers cannot reliably spin high rpm without failure. To compansate this you can change pulleys to slow the SC down. But a negative result is it takes higher RPM to get max boost. Another note, the faster you spin a roots blower the less efficent at moving air it becomes. BTW this gets me thinking https://www.nopistons.com/forums/pub...1047683561.gif anyone ran a rotary on alcohol with SC or turbo?

yea Im puttin a prelude kit on my rx7 its a very nice fit. And I dont kno if its a roots but I might have heard centerfugal somewhere.

unreliable is BOOST!!! 18psi 10psi 7psi its all boost and all givbes more strain on your engine than if it were N/A as it is now, so it will be less reliable, but 7psi just gives you more time to save up money https://www.nopistons.com/forums/pub...IR#>/boink.gif (j/p) like mentioned above is the SC off an RX7? or just some car?

Is it one of those "spoilers" that came from Boeing? https://www.nopistons.com/forums/pub...1047683785.gif I wouldnt have said I got it off a Pee Tec either. BTW you plan on driving over 150? because until that kind of speed all your doing is cuting your car up and adding wieght.

Just my onesided opinion.

NA have too high compression for boost over 5 psi

plus my rx was hit in the frontm, only bumper and fender damage nothing else effected at all I have to change the bumper and fender so why not put work into it with a free spoilerI havnt spent much on my car yet, Im doing most of the work. Including buying the car and the engine I havnt passed a thousand yet

yeah, boost is boost, and will strain you engine.. you will need to make sure you keep the fuel fed to the engine..

front spoiler is much more effective... I was thinking rear deck wing/spoiler the front of the car is where you can see real aero benifits

SO uh.. where is the charger from?

and what kind? and why did it have a cooler?

no hooters tonite..

Its gonna be a front mounted intercooller so the kit would help a bit and my rx hit well above 150 at the current moment. although Ive only brought it to 138 I did it with ease in 4th. I was just trying to save some money givin it a little more take off and Ive read that the the supercharger will not harm or shorten the life of the engine. **** it just wanna try somethin diferent.

Yea, i agree.. since no one's going to be hitting 150+ mph on a daily basis.. it would just be a waste. It's not like they look good either..

All I have to say is why not? https://www.nopistons.com/forums/pub...#>/biggrin.png Well just make sure you take care of the fuel side of the business. Supercharger would work easlier with the carb setup vs stock efi. But as someone mentioned the roots type blower doesn't work well with high rpms, nor do blowers in general. The reason rx7s are turbochargered and not SC, is because of the high exhaust output, you can spool some big turbos.... You can't compare pwr of a certain psi between turbo's and sc, its way too complicated, you would have to have the same cfm rating to really know....

heres a link http://www.atkinsrotary.com/supercha.htm

SC ould also require some form of fuel delivery. The Dellordo carb would be a mission to adapt. The more I think about it, the more exspenive it becomes. Unless you go back to S5 EFI from your 89. The injectors are easy to upgrade, as is the CPU

Well it going to get very expensive anyhow....

Think hard about the NOS, I had to have it. Cheapest way to add hp, right? Maybe not, blew the intake off of the manifold today. Now I will have to find one to replace it. It worked fine until today. Thats the chance you take. I will be saving for a turbo setup, and I havent ruled out the SC, so keep us posted on how it works out, mine is NA too, but I dont want to leave it that way.

well if the car has an atkins kit then go for it..

No rx7machine your right I dont hit a buck fifty on a daily basis but I do like to race the wanderers whenever I see them considering the trafic and conditions of drivin in the NY area its not just about top speed more like take off speed. most races hit a top speed of 70-90 Im happy wit my car race me in new york traffic and Im out. Its good to be diferent.

So much for the junk yard help I guess... I dont understand why you asked for help with a junkyard part, and then when you get some input on your vague question you counter with a well known Co. that got it right for our application https://www.nopistons.com/forums/pub...1047683561.gif And you still havent answer ANYONE'S questions

Someone else I know in here used to have a bad way of askin questions when he was a Newbie......



HINT HINT https://www.nopistons.com/forums/pub...1047683561.gif

So you blew the weld on the intake? https://www.nopistons.com/forums/pub...#>/biggrin.png No really what happened? What system/setup do you have?

too much hate in here I guess im just gonna have to sell more drugs to buy a rotary supercharger even tho its prob the same ****. I hope I aint supportin terrorism.

YES I AM A NEWBIE, but I have ALOT of knowlege of SC, roots and screwtype mainly... I say sell the SC kit and buy NOS... with your carb it would be fairly simple and cheap

Did your floorboard fall out?

4:20?

hehehe..

!!!Damage to Manifold!!





ok so is the supercharger kit one like the one from atkins? if so then it has been tested to work on a rotary, you may just have to upgrade the fuel pump and re-jet the carb... but if it is not from a roatry engine the flow may not be correct and could have very little effect on performance or be too much for the engine and blow it up.. I say for $100 you can't go wrong, besides once you have it and think it will not work you can always sell it and probably for more than that..

Old street racer tip for NOS backfires... install oneway blowoff valve.. It is for a SC app. It is aproxment 3/8 Dia one way high PSI valve that opens when a set PSI is applied, saving the carb/ manifold. I will see if I can come up with a link

BTW there is alot of applications for this valve, not just SC