I have decide to do a n/a build. Im not to in to drag, but my target 1/4 time would be low 13's. I would like to get in the high 200's as far as HP. If I could see 300, that would be awsome. Now I am just a bar going college student...so I dont have a lot of money to put down. But I have all the time in the world as of now. I am in no hurry to complete the project. Can I get some advice on parts that I should look into? Maybe if someone has a similar project (complete or in the process) they can help me out. I have already got TII rotors to swap. Should I port or not?

 

Why do you want to swap to turbo rotors if you want to keep it n/a?

 

t2 rotors are low compression you'll lose power and gas mialage, you wont see the numbers you want with out a bridge port nos aor a turbo. low 200's is feasable with a decent port/standalone system. i say if you wanna keep it n/a try 3 rotor, but it may be finacially not possible if your in college.
good luck. btw as far as rotors go get s5's and if low end isnt a issue use t2 housings instad of n/a ones. the ports are bigger and its possible to get higher numbers. also sets you up for a turbo addition later if you decide to go that way

 

Not possible without radical porting or adding another rotor (or running nitrous).

This is the wrong way to start a project. Since you have all the time in the world, use that time to save up about $10K and then start your project. Things will go smoother, the result will be so much better and you will enjoy yourself a lot more.

 

Low 13's is possible. 1 word... weight reduction.

High 200's... good luck.

 

ok...well I really want to do a lot of the stuff myself so I can learn hands-on with the rotary. I would really like to know what is do-able and I want it to be street legal at the same time. So low 13's are possible. Is there some tutorial type threads on here some where? Or other links to help me out. Anything will help...any other input???

off subject..but does anyone know of someone that has fab'd up some lambo door hinges for the FC and will sell some? $1200 Is ******* ridiculous!!!!

 

lambo doors will get you high 16's not 13's...

 

dude, if you want power, you're going to have to turbo charge. You can only get so much out of an N/A - and as far as I'm aware, a straight pipe exhaust and true-cold-air intake can still only help you by a few horses. 200 to 300 horses? Turbo, baby, turbo ... and money. lot's of money.

These cars are like most high-maintenance women, they're HIGH MAINTENANCE! and cost a lot, if you want them to give you what you want. And they're very moody, too, if you don't baby them.

That's my two cents, anyway.


I personally like my N/A for the reliability. I'm one of those who got the RX-7 for the "cool car" to drive to work in. If you want an N/A, you're not gonna get the numbers you want. Not outta this car anyway.

and yeah, swapping to turbo rotors would be a waste of time, unless, like i said, there's a hot turbo to pair up with them.

 

You're a funny guy. Really. I think I won't kill you.


lol.

Dude, read. Just search, and read. Just stay up, late at night, like the rest of us car-tweeks, and read. Just don't believe half the hype you hear, or people will laugh at you like they laughed at me. lol

 

high 200's? peripheral porting is in your future. well, that or a huge let down...

 

Sometimes I find it humorous how people seem to talk about rotary like it's completely alien. Like it's totally different. I mean, yeah, it's different, that's half the reason why anyone likes it, I think... but it's works off of all the same physics that any internal combustion does.... and the nature of the beast is still the nature of the beast. It's a damn car. Working on it is working on it, like any car.

They're like women, I think. They're all equiped with the same damn stuff, but each one's got they're own tweeks, bags, and quirks. Every car is the same as any other, just with it's own tweeks and quirks. A car is a damn car. each one is special, but it's still just a damn car, with an engine, a transmission, wheels, brakes, seats, windows, a steering wheel, and maybe even a radio.


I'm as confused by rotary engines just as much as I am by pistons. I just... don't get how people always say "I want to learn these rotaries"

I guess I just won't understand......

 

umm yeah. There is a 3 rotor peripheral ported FD out there making over 300 to the wheels all motor. Has about 15 to 20 grand worth of mods and custom **** done to it. N/A builds to that power level are extremely rare. Don't be that guy who talks all this junk and then posts 6 months later about how he's putting the project aside...

and DON'T EVEN THINK ABOUT LAMBO DOORS. You need every cent you can get to do this. Before this car is even close to running you shouldn't have a dollar to your name.

 

no joke man

 

OK, i mean learn how to tear it down and build it up, and swap internal parts like rotors...see what works and what doesn't. For me (as-well-as many others) the best way to learn something is hands-on. Im not going to be the guy that post in 6 months and says that he is going to put off the project, or put up a classifieds ad!!! I know these things take time. I am not trying to get the project done ASAP. I just want to know what the best way to do a decent powered build. I've wondered how much you can juice out of an n/a. I have thought about turbo...but since I have a s5 n/a block I thought what the hell. Apparently if I want a beast its better to go turbo, which I already knew. Im just trying to get started and learn as much as I can! My very first car was a 81 gs. I have loved these cars ever since. So I want to take on a project of my own, I have what I need to start with, (a bare block), and now im going to take this opportunity to do it.

Now, if anyone can help me out I would really appreciate it.

What to consider
Good places for parts
Users to go to for help/advice
Maybe some ppl around my area that have experience and have done their own build(s)


Im sorry if I ask stupid ?'s...But bare with me im learning! Everyone has to start somewhere, right?

 

Get a copy of factory service manual (FSM). there might be one on the site, do a search.

 

Factory service manual:
http://www.rx7city.com/88manual.htm

--Alex

 

Good call!!!! Thanx man! I also found a guide on turbocharging a n/a by Aaron cake....but i looks like it is a lot easier to do a TII complete swap (less $$$ too)

 

I don't think a P-Port would be too streetable.

As for NA power, what if you did a good street-port, new exhaust, intake, and RX8 rotors? You'd learn a lot about your car and oughta be well into the 200's, I'd think. I thought I read somewhere where the RX8 rotors alone put someone into the 200's on an NA engine.

Porting is almost free if you can find/borrow a Dremel tool, or even a cheap knockoff adjustable speed rotary tool would work. Intake and exhaust wouldn't be too unreasonable.

 

Does anyone know if the rx8 rotors work? I have a decent dremel, does anyone know where I can find some porting templates? Or have some they can send me?

 

RX-8 rotors *will* work....however the have shorter apex seals due to the lack of a peripheral exhaust port. Also IIRC the apex seals are narrower as well. However they do have slightly higher compression than S5 N/A rotors.

Porting templates can be bought from racing beat.

You should be aware though that any porting aside from a streetport is going to require a full stand-alone to run. And before you go buying porting templates and a build stand you've really got to ask yourself some questions:

1: How much power do I want?
2: How much money do I have, or can spend?
3: How much of this work can I feasibly do myself?
4: Will it be driven on the street?
5: Do I need to buy another car to drive while mine is torn apart for a year?

These will help establish a plan of attack so you don't end up getting in over your head. Now 1, 4 have been answered...mid 200hp and yes.....so for those numbers you're going to need (if keeping it N/A) a fully rebuilt and bridgeported engine (about $2000) a microtech, megasquirt or similar EMS (ranging from $5-600 to $2000) and a prayer that your N/A drivetrain doesn't fly apart for a while. or just go ahead and swap in a full turbo drivetrain for about 1000-2000 depending on several factors.

Right there you have possibly 6000 dollars spent. This is before we talk about little odd and end items like fittings, fuel and maintenance items. And its also assuming that you can get away with running a BP in your area.

IMHO your best bet is to do a TII swap. Search it.

 

If you want a place to start, there is a topic in the Archives called "how to make a beefy n/a". It's a good first read.

To see what is involved in an engine build, there is a topic in the Archives by me with the title "Pics and Status of My Turbo-NA-Bridgeport Engine Build" or something like that.

Aside from that, just read and keep reading the forum. There aren't any real tutorials that provide step by step instructions...

 

I think that you'll need more money then you're willing to throw at the car.

At the least to make 200HP (or more :O!) would be:
Kahren staged streetport/bridge
Upgraded stationary gears
9.7 rotors
New intake manifold
EMS
Fuel
Misc ****.

After you spent 4-5k, come back and tell us how far you are along .