DSMwhat

Ok, first off let me introduce myself to the board regulars. My name is Andrew I live in Atlanta, and I have a 99 Eclipse ~385 FWP.

I just purchased a Dark Blue 93 RX-7 Stock TT.

I am flowing in the cash, I'm a JAG officer for the 22nd Air Force. (government lawyer)

I thought I was brilliant with cars, I could rebuild my little 4cyl turbo eclipse in a couple of hours.

Then I opened up the hood of my RX and got kinda knocked back on my ***. I plan on moving directly over to a single turbo conversion. My first question was going to be, how much can the internals (pistons/rods) handle before getting a little to hot for themselves. But come to find out mazda built this beautiful 1 of a kind rotary engine

So my first question is, I want the car to be streetable but still put out some massive horsepower. For a single turbo whats about the biggest I could go, but still have a pretty good daily driver. And is there anything I should watch out for. Don't worry I'm already downloading as much information about modifying the 13B-REW engine and should have alot of it figured out in the next few weeks.

DomFD3S

And yet this engine is a complete mystery to mechanics w/ 20+ year of experience.

A couple of pointers:

1) Purchase a service manual (whether genuine Mazda or Haynes or Chiltons, etc.)
2) To further help w/ your engine questions, purchase a engine rebuild video. Either from: www.atkinsrotary.com OR www.rotaryaviation.com
3) Search this forum (especially the single turbo area and this 3rd gen area) inside and out!
4) You will need to upgrade your fuel system.
5) You will need to upgrade your engine management.

That is probably the most useful info pertinent to what you need.

SPOautos

hmm, well if your wanting to make a real good reliable high hp 7 you need to start off with a compression test to make sure your engine is going to be good for it. How many miles is on the engine?

What do you want out of it? Drag racing? road racing? autox racing? non of the above? Depending on what you plan on doing will make a difference in what people tell you. If your into drag racing how fast do you want to go? You looking for 9's, 10's 11's, 12's

Is there ANYTHING already done to the car?

And how much you wanting to spend?

STEPHEN

DSMwhat

the beautiful part is im making 125,000 dollars a year, and im single (divorce) too bad she left me when i was flat broke and had nothing for her to take

im well aware how to run engine management systems ill probley run an AEM EMS, seeing as how I already have on my eclipse.

Ive already got a stock manual coming, chiltons is coming in the mail as we speak. Ive seen a few engine rebuild movies at some mazda mod sites, Ill guess I'll order a few and stick a TV in my garage (which i happily turned into a full out service shop)

The car will be used for drag mostly 1/4mile track times and a dyno showoff. The compression is good across the board, the turbo's both spool like freaks still. There is only 38k miles on the car.

What im trying to figure out now is how much these engines can take before the rebuild.

black99

These guys are both on the right track. There are so many ways to increase hp and so many good combinations. And of course different combinations are better for different types of use. And different combinations cost different amounts and of course the faster you want to go the more it's going to cost you.. So you kinda have to decide if you are going to do any racing with this car and if so what kind, how many days a week you're going to drive it, how fast you want it to be and how much you wanna spend.

DSMwhat

could someone point me in the direction of a website that goes through the working of a rotary engine. i just need a diagram that shows where the intake paths are going in the engine, when the air is getting compressed and then where fuel comes in extra. I'm just lost as all hell in this engine. Once i get the basic understanding of how the rotary engine part works I'll be off on my own. I mean Ive had a turbo car ever since I was 15, but this thing is a totally different world.

black99

It's not how much the motor can take, it's how much boost you can run through stock ports and still get the horsepower you want without it detonating.

I would use "how much the motor can take" more for motors that have bearings, rods, cranks, etc.

The main thing you have to worry about on these motors are coolant seals(which wear usually if the motor is run to hot or with age) and apex seals (which again usually go with age due to carbon build up, or with poor tuning/running the motor too lean). To keep carbon buildup down do drive it like it was meant to be driven every once in a while, believe it or not it helps the life of the motor.

RX7Elmo

www.rotaryengineillustrated.com

danny

black99

http://www.howstuffworks.com/category.htm?cat=Eng

there you go also see these links at the top:

https://www.rx7club.com/forum/showth...threadid=68640

DSMwhat

black99 thank you. thats the type of information i needed to know. I need to know whats gonna need replacing and why it goes. I've already got a pretty good idea about how the engine runs.

my first assumption, rotary engines get great port jobs and alot of seals/bolts/studs replaced when there rebuilt.

lets say I left the engine alone, whats a good amount of boost to run with a single turbo setup, mainly for drag (top end power)

black99

Most when rebuilding their rotarys do get streetports, and all the hoses and motor mounts replaced. Most people reuse rotors and housings unless they are scored bad from the motor running out of oil or something like that which would make them unusable. Housings and rotors can't be machined so when they're junk, they're junk. You have to buy new ones.

You probably won't set any records at the track with a single turbo/stock engine but it will still be more reliable then the stock TT setup and should make you more power then the TT setup.

If you leave the motor alone, I would only run one of the smaller single turbos as anything big would only benefit you at high boost levels and with a street port. On a smaller single turbo, something like the xs to4e or apexi rx6. Or even the A-Spec gt 35/40 combos alot of the guys are using. I would go for around 15 psi probably. You don't want to stress the motor out for a couple more horses an lose reliability. And if it's a street car, something around 350-400rwhp should be able to handle most anything you come in contact with. The big thing that is going to hold you back as far as power is your stock motor though and you have a chance that if you do blow an apex seal because of running to lean it could send peices through the turbo and you'd then need to have the turbo redone. Which is why alot of people like to rebuild the motor while they're in there, you can then get the street port and make more power, and to be safe and just so they have a little bit security.

dubulup

dude you're hard core, we should meet!

pomanferrari

iTrader: (1)

Dude, are you a GS-15 b/c that is as much as the sweatshops pay out here?