im having a hard time deciding what to do here. i have a 88 n/a se and have a few options. i have bought a T2 drivetrain and transmission. i could convert my car to a T2 pretty easily now but will cost a but but have the awesome top end of a turbo... or i could get a 4 port motor and supercharge it and nitrous to get awesome low end and some decent top end. i have the money to do both i just cannot decide if i want the roar of a super or the pssssssss of a turbo. what would you do?

 

Nitrous? What the hell? Why? I'm a fan of consistancy and nice low end, so if I had the money I would supercharge. But you have a TII tranny already so i would just do that. no point in pumping more money into your car than you already need to.

 

IMO if you are goign to drag it, I would go with a turbo. If you are going to auto-x it I would go for a super. I wouldnt put nitrous on it... real race cars dont wear bottles...

 

im not gonna race it im gonna use it for weekend recreation and some week driving so pretty much its gonna be a street car

 

Do a V-8 conversion. Loads of power and the best sound on the entire planet....

 

that was very tempting i admit... talking about the hp gains and insane power in an FC but every since i found out about rx7's i have been facinated with the rotary motor and love it, i just cant bring myself to ruin a "classic" (IMO). i want to be different from other cars and i want to be able to say "yes my 1.3L motor kicked your v8's *** " on the track, guess some people on here could say i was raised right

 

I would just settle for the turbo then

 

Jeah. Turbamabo.

 

You won't get 'awesome low end' with all kinds of supercharging. The kinds I've seen for the N/A RX-7 all build more boost the higher rpm you get, and since the damn things rev to 7500, you don't get much power until you're way up in the powerband anyway.

I can't remember the name of it (positive-displacement?) that can always deliver full boost. That'd be the way to go, but as you can see in my sig...

 

Personally Turbos are better, but I would really like to see a Supercharged Rx7. If you go with a SC, then get teh candem unit from atkins rotary. Get a 7 inch one, and don't use a holly carb, go here http://www.theracingstore.com/intakes.htm and get the EFI that replaces a 4bl carb. And get a Microtech or Haltech EMS. This set up would be killer.

 

Hmm...didn't know there were any EFI options that replaced the carbs on that setup...intersting.

 

Turbocharge and then add nitrous for good measure.

 

go SUPER CHARGE.... you can go with a RACING BEAT HEADER... and still keep it emission friendly.... You don't need that nitrous... make sure you get the one that changes gears SUPERCHARGER...

 

You have a 6 port motor. The first thing that you would want to possibly consider before you do this if you dont want to be n/a is the compression ratio. That and the fact that you motor is not ment to be turbo charged, thats a 4 port motor w/ lower compression. Heres some other things to think about:

1. if your on a bugdet, you will still need all the parts to complete you engine ( turbo charged).

2. if you supercharge the car it usually comes with all the parts but it takes power to make power.

3. no matter what kit you buy you should always add a couple hundred dollars for incedentals.

 

that is true i have the 6 port but i planned on buying another T2 engine and about #3 haha more like a couple of thousand the rate im going. im working on suspension and brakes at the moment and that alone is costing me out the *** but i want it done right with good parts, least i save on labor

 

Ditto

 

Bottles are for babies....real men get blown.....

I am looking at a sc setup for my NA. BTW--if you contact Atkins Rotary, ask them about their EFI-compatible setup. I talked to the a couple months ago, and they said that it should be out in the next few months. Supposed to be directly compatible with the EFI we already have, and supposed to be somewhere near the same cost they tell me, so you would save some cash if it is ready for sale. I am going to stay away from the bottle completely, since I wont be taking it on the track or anything. I just want better power out of it., enough to make people wonder what the hell just happened?? heh heh

 

I've been having problems w/ my turbo being too small so I have though about fabbing up my Lysholm SC (very efficient positive displacement).

But I can't do it! I LOVE the sound of a turbo. W/ my 3 1/2" turbo back exhaust you hear the turbo whine out of the TAILPIPE. Sounds like a turbine engine! The blow off valve is a little annoying, but I can deal.

 

I am a fan of the old school Nelson / Paxton SC setup. It is simple and clean. Many six port NA FC's have used this SC with success. All out performance favors turbos but I would rather have the smooth power delivery of an SC and lack of really bad gas mileage. Turbos seem to need really rich fuel mixtures to run best while SC's don't seem to heat up the charge as bad and don't need so much extra fuel to cool every thing off inside (to prevent detonation).

A turbo with water injection would solve this but who is going to top off their distilled water tank under the hood at every fill-up if it is their daily driver? A modest SC setup is what I would choose because it preserves the really cool rotary power band. Drag queens have V8's anyways . . . I don't see RX-7s as drag queens.

 

Well... whoever is in front at the line is the winner, no matter what the hells its on.

Anyways, If i had all the money in the world I'd probably run a bad *** blower setup, but ****, turboing these cars are cheaper. A blower alone cost around 1500+ from what i have seen, and they usually drop off j(over-rev)at around 6500RPMs or so (unless you get a bigger pully, but then you compromise some power). I'd personally, if i were you, run a turbo. Check out Aaron Cakes post about his N/A+Turbo setup. Looks good, works good, and is fairly cheap, probably about as much as a blower compresor alone.

But dont just take my word for it --reading rainbow theme here--

 

relax there vin diesel.

I'm certain you don't need nitrous AND a supercharger.

Turbo wouldnt be a very easy project in your case. You would have to do a t2 engine swap... harness and all.

Not really worth it IMHO.

Get a supercharger... then you're unique And you can keep your high compression 6-port motor... you'll just have to take it easy on the boost... but the feeling will remain the same. You might need some better secondary injectors tho

Good luck

 

QUOTE-
All out performance favors turbos but I would rather have the smooth power delivery of an SC and lack of really bad gas mileage. Turbos seem to need really rich fuel mixtures to run best while SC's don't seem to heat up the charge as bad and don't need so much extra fuel to cool every thing off inside (to prevent detonation).

Nope, turbos get better gas mileage. The turbo actually aids gas mileage when idling and cruising over even an NA and is MUCH better than a supercharger MPG that is always robbing power to drive it and boosting even when cruising.

Turbo guys run more rich because they know what they are doing- If the SC guys wanted the same reliability/safety they would have to run even more rich than a turbo at the same boost since a SC produces MORE heat in the aircharge than a turbo due to their lower adiabatic efficiency.

The most efficient positive displacement SC is the Lysholm (high 60%-ish) and even a centrifugal SC is not as efficient as a turbo (high 70% to 80%-ish) - even though they use the same centrifugal compressor- since the SC is rarely in its peak efficiency RPM (one engine rpm only) when driving, whereas a properly sized/boosted turbo is almost always operating at peak efficiency as regulated by the wategate.

Hell, most SC aren't even intercooled- they better run A LOT more fuel then if they want even near the same reliability per boost as an intercooled turbo!


Smoother SC power delivery I can't argue with

 

THe SC compressor is not attached to the exhaust manifold like a turbo compressor. This is why the SC does not heat up the compressed air as bad and some SCs do not need intercoolers for modest boost. I disagree with you on all points!

 

I aggree with Blue TII on everything except for the heat thing. But Integra you don't NEED a intercooler for moderate boost, but not having a intercooler would kinda be like shooting you self in the foot. Cuz even SC heat up the intake charge noticably therefore decreasing the added power of the boost (I am on cold pills right now so excuse me if that sounded stupid).

 

Being compressed in an inefficient device (supercharger) heats the air much more than whizzing past the the hot parts of a turbo at hundreds of miles an hour.

Early low boost turbos did not use intercoolers either, but turbo systems evolved. Really, turbos are just an evolution of superchargers- used because they are more efficient.