Kickitinwashougal

Hey guys im new to rotary motors so i'm looking for some education but I just bought an 89 rx-7 and i'm looking to hit 10 seconds eventually so any information is crucial to my goal. I have 1500 dollars to start with. And money coming in over time so please inform me on how these work. I understand the basics pistonless motor. constantly turning the rotor. And block if that's what you call it?? I am currently running a 13b Non-turbo motor. So again any information is crucial.

FirstRotaryExp

iTrader: (3)

in order to hit 10's effectively you may want to consider searching for a turbo setup. But before you think abotu modding your new NA perform the full tuneup and seek out the FAQ at the top of the 2nd gen section for more information.

Kickitinwashougal

I ahve already checked facts and this weekend is devoted to double checking everything. However my friend who owned it before me has already done all wiring checks and everything and i'm double chekcing him anyway. However I knwo he does good work. However one problem to fix this weekend is TPS. However understadly in my book is quite easy. It's a relatively new JDM motor installed by Pineapple racing in Portland Oregon only 2k miles on it since install. Other than that and full out racing exhaust I believe by Borla it's all stock and ready to go.

MazdaSpeedDemon

Post pics of your new seven if you can.

If your keeping it N/A you might want to port the motor and consider nitrous.

Kickitinwashougal

I would like to twin turbo it if possible. I will post pics as soon as possible as is I just had 3000 dollars worth of business of equipment stolen and I lost all my keys to every car I own today. So tomorrow hopefully camera and all will be up. I have aftermarket fiberglass fenders on the front. Other than that all stock except the new motor from JDM. I understand Nitrous is very dangerous in rotary in the simple fact that you get one shot and if it predetonate or anything you screwed. So please tell me where to put my money first into pre amping myself for the future competition. Also someone please give me an e-mail or something elaborating on how the rotary works more efficiently I know very basic info not a lot.

Aaron Cake

iTrader: (1)

I don't mean to be a downer, but if you want to run 10 seconds on a non-turbo engine then you are going to be needing a peripheral port setup, a good shot of nitrous, massive weight reduction and all the drivetrain stuff that goes along with it (transmission, clutch, rear end, etc.).

Since this is your first rotary, I would recommend that you readjust your goals a little bit until you at least understand how the engine works.

Or, I'll put it another way; If you want a 10 second car, the that $1500 should just cover the price of your clutch.

trainwreck517

iTrader: (1)

All Jdm engines are turbo, how is it that you have a JDM non-turbo? So then its abously a USDM engine if its non-turbo.

And to hit 10sec 1/4 mile pass.. you will need alot more thenjust 1.5k... 15k should get you there though.

Good luck.

and check out howstuffworks.com and search for rotary engine.

Kyrasis6

Well he said he had 1.5k to start with and more as time goes by. The thing is with a rotary you can't just take something, modify it and put it back on, most things to be done with the engine require it to be removed and taken appart. Most of the project isn't going to be somethign you can dump a couple hundred bucks into every now and then, your going to end up buying an engine and building atleast the whole shortblock from the ground up which would run you a few thousand.

If the engine and drivetrain are in good shape I would work on the chasis one piece at a time.

Kickitinwashougal

OK I know that this car is not a couple hundred bucks easy at a time I understand patience and not having a race car for a few months I make around 7k a month and only 2k a month is currently tied up. I just put 3k into my honda cbr and I bought the car so money this month is tied up. Other than that though next month is a different story. And JDM actually sold non-turbo motors I believe 4 years ago as I remember however I may be wrong and you may be right in saying it is usdm. I and maybe 10 seconds is pushing it on a 13b how about 12. Is that a better goal??? 2 seconds is a long time on the strip.

Kickitinwashougal

also i'm looking to learn here. I may be able to go afford someone to build the damn car. But I don't do that I have always built my cars to where I want them. All my trucks motorcycles. I build em' how I like em'. So learn me in guys. I am checking out the website howstuffworks.com

Mephis

I would 1st get your self a shop manual and learn about all the systems on the engine and why/how everything works the way it does.

Otherwise you'll end up getting into costly mistakes... Like me....


You're not going to realisticly run 10s on an N/A someone here needs to tell you that. Shoot for something like 13s-14s now. A massive port job (peripheral port) will go a long way towards that. You really need a turbo/supercharger to get down into the 10s, or another rotar.

I think you might be able to get a rebuilt with a port for around $1500. (Don't quote me on this, that was a long time ago that I remembered seeing that.)

eriksseven

iTrader: (6)

First off, just take things slow... Be patient and realize that you're not just going to know everything right off the bat. It takes at least several months of absorbtion in a place like this forum, before things even begin to make sense.

Regardless, you should realize that your N/A Rx7 is very limited in what you can do to create serious power. There are ways to build an insanely fast N/A Rx7, but they are 99% un-streetable, cost thousands of dollars to build, and are way beyond your current abilities.

So that leaves you two options for your Rx7: Either get used to the fact that your Rx7 will never be in the 10's or the 12's and learn to love your N/A Rx7 for what it is, or look into a turbo swap... I recommend the former.

Oh yeah, and don't even bother thinking about a twin-turbo setup. Also, there were no "JDM" non-turbo Rx7's.

Good luck and just take it slow and easy.

adrock3217

Ok. First off, no, the Japanese market never sold an NA engine. All were turbo'd, including convertibles.

Next. If you wish to get anything faster then a sub-14sec quarter mile (and still wish to have some sort of reliability *which rules out peripheral port*), then you will need to be looking into going turbo.

In my opinion, I say take that $1500, and hold on to it. Start looking for turbo parts, or a complete turbo parts car. Get all the stuff you need (drivetrain, electrical components, etc), and then put it into your NA.

If you want to go the easy way, and if this car doesn't mean a lot to you...sell it. Fix any minor problems it has, clean it up, and sell it for a profit. Then buy a Turbo 2. This will get you a complete platform of which to build from, and with minor mods (intake, exhaust, fuel, boost controller), can be into the low-13's.

adrock3217

Kind of odd how we both said "first off" :O

snowball

if your looking for 10's that car will have to loss alot lof weight, and gain a ton of power that would make it imposible to drive on the street NA.
since any road to the 10's will be paved with money, you might as well buy a 3 rotor and single turbo setup, prob will be cheaper in the end and faster.

alexdimen

iTrader: (13)

i don't get it. you could have (7k a month as you said) and should have bought an FD (93-up RX-7)...

NA rx-7's are fun cars and can give you some great time behind the wheel, but don't expect to dominate the drag strip or track unless you plan on basically re-inventing the whole car.

as cake said i'd go peripheral port if you're up to it... you'd be my hero

tandolla

iTrader: (1)

I'm going to TII swap route i know its going to be a bitch but im looking for power as wel.. just kinda lettin you know to maby let you go buy a TII car or do a TII swap..

Kickitinwashougal

OK a few questions if I go three rotor that means the 20b motor if i'm correct that means wiring harness all that has to change correct???
Twin Turbo not at all possible??? I hear bad reviews but much power down or reliability.
TII swap what the hay is a TII???
I picked up a manual reading it out. I'm a very fast learner. And the reason I bought this car is more as a sleeper. You all know what that means i'm sure. Also my friend is needing the money for college and it belonged to him so I figured i'd help me out. Personall i'm a muscle car kinda guy and I like the rice rockets and all that jazz just never really pursued it so I figured i'd start on a car I can screw up you know.
Oh and the 3rd gen cars, man who would waste the money just for looks lol. JK I definately would however I'm in the process of buying a house right now. So 10k dollars on a car can be a lot when 10k dollars can mean your down payment or if I spend that I could be 2k short on buying cash. hehe. I've been saving since I was nine.

snowball

yes it would mean a wiring job, but your going to do that no matter what, everyone making power will switch to a stand alone fuel setup at some point.

Kickitinwashougal

OK my understanding is that the 13b non-turbo has higher compression than the turbo. So could I esencially but a turbo on the NA motor and get more power and then I don't know if possible but a higher compression rotor?? I know piston motors do it. And I read something on the stillen website about higher compression rotor but could never find stats or product so any more info??

FirstRotaryExp

iTrader: (3)

higher compression means you ll have to run less boost....detonation is worse on a rotary as it could send yoru apex seals into heaven.

eriksseven

iTrader: (6)

TII is short for Turbo II (which is what the turbo 2nd gen. Rx7's were called).

If you bolted a turbo onto your high-compression motor, you would likely have more power than the same turbo on a lower-compression motor. However, I personally don't think the gains are worth the risk. There is a little more low-end and mid-range, but I don't think it's significant enough to risk detonation. I've built a couple high-comp TII motors and they were too easy to blow... lol.

I'm currently running a high-comp motor with sucess, but I'd prefer the lower compression turbo rotors, which have a ratio of 8.5:1, compared to the N/A rotors which are 9.4:1.

Kickitinwashougal

Just read up on a Supercharger for the NA 13b motor is this possible guys or should I just absolutley eliminate it from thought.

KeloidJonesJr.

iTrader: (8)

Maintence Maintenence Maintainence! Regular maintainenc is key. Check the fuel PD for leaks. If you want to hit 10s in the N/A look into porting.
http://fc3spro.com/TECH/PORT/porting.html

FirstRotaryExp

iTrader: (3)

Anything is possible with the right amount of money and fabrication. Two or three gentle men have attempted such methods of forced induction here in teh last year and the threads are lingering around.