Just got into a third gen...STOLE IT!!! I would like to be able to communicate with someone who can help answer questions and get some advice. The car is set up with single, V-mount, all sorts of goodies...needs fuel and management system pretty much. If someone has the time and patience to coach a new third gen, but multiple RX owner, I would appreciate it! See pics!!!

 

If it has a single and no fuel upgrades or a ecu i would not drive it until it does. A PFC would be perfect for you and 550-1600 injector with a aftermarket fuel pump sould give you plenty of fuel unless youre looking for crazy power. Welcome to the 3rd gen world!!! Hope you have a nice sized bank account!

 

The car has parts as follows: OEM : Injectors and ECU

Aftermarket: V-mount - rad. and intercooler, turbo is Greddy 20g w/ 50mm racing gate and Turbo XS BOV...3" exhaust...port is unsure...she said 80% thinks it is....Walbro 255lph pump and plugs are 9 and 11.5 heat range NGK race plugs and wires..jacobs ignition box...also has Greddy Turbo Timer...

So my questions or advice are for what injectors...I heard 42lbs would be enough...and what computer would be friendly to have that I don't plan on messing with very much or at all for a while....I heard Petit reprogrammed ECU would be cheap way to go....and I did get a fuel rail with car....do I need a second rail for secondaries?....new to all this so I want to spend some money on the right parts since I got the car for so cheap. What about the Power FC and controller I've seen? what else would I need to get?...

Any help is appreciated and thanks in advance.

 

you have a LOT to read...


ditch the turbo timer




WTF??? who the hell sellls a single turbo converted RX-7 without the ECU??? I'm assuming they took it out and sold it seperately very irresponsible to say the least. Yeah they sell the car with the price tag of a single and get additional $$ on the side from the ECU. nice...

I hope they told not go WOT.... Get an tunable ECU and a reliable wideband ASAP. No joke bro you will blow it up.

Just in case you don't believe me:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/engine-safety-mod-advice-853395/


42 lbs of what?

I'm runing 550's primary (stock) and 1300's secondaries, with stock fuel rails. I sent out my secondary injectors to RC engineering so they could be boared out from stock. This gives me enough fuel for my current needs: 80% injector duty cycle at 15 psi on a GT35R.

not for a single it isn't, unless you consider a rebuild cheap.

FYI-When you change out the factory turbos for an aftermarket one (non stock) you are completely changing the CFM. Now your stock ECU is expecting a certain CFM therefore you have to go to a custom tune setup. Given that, you can exclude any ANY preprogragged/rechipped ECUs on the market as they are based on runing stock turbos, stock injectors. Basically only use a preprogrammed ECU if you ONLY if the car has basic boltons and elevated boost levels.


the #1 thing with these cars is fuel keep that in mind. Also make sure you research a reputable 3rd gen tuner in your area (not one that is good at tuner other cars, they MUST know 3rd gens), and find out what ECU he is most comfortable in tuning. Then buy that one and get your car tuned.

 

I'm not familiar with most single turbo set-ups, but if it's not water-cooled, the turbo timer might be good to keep.

This is the second thread I've seen from a new owner who bought a single turbo FD but still had the stock ECU. The other was on another forum.....

 

Agree with the others, no programmable ECU on a single turbo car is bad news. Even if it were set to stock boost pressure a single produces enough flow that it's still dangerous.

Reflash ECUs are still stock ECUs. They won't adequately support a single turbo setup.

Anyway, look into a PFC. Plenty of tuning support, excellent performance for high HP applications, and easy to use/own. Basically you can get it set up and forget it.

Likewise with stock injectors, you could tune the car to fit the limitations of these injectors but it won't make sense. So plan to change those.

V-mount, ignition, and fuel pump can probably get you there. It will depend how powerful "there" is. I would encourage you to not set that bar too high right away.

If you want to keep a quieter thread discussion going, you might just post in the new owner section. Obviously this forum must be cordial as well but in this section people tend to be more direct. You probably noticed that we tend to throw around cc's/min not lb/hr here.

FYI a single turbo car with stock ECU and injectors makes me reckon the owner did not know much (if anything) useful about these cars. I would go over the car with a fine toothed comb for both mods and maintenance that needs done.

Dave

 

Seriously, maybe even look into finding a helpful FD owner near you to help you inspect it fully. A single with no fuel and no proper ECU sounds like it could be trouble...hopefully not though. Just make sure to inspect fully before driving hard.

 

The flow rates between the stock twins and any single are going to be totally different, they create boost in totally different patterns, and the Stock ECU, regardless or boost levels isn't equiped (Especially since it doesnt utalize a MAF sensor) to handle it. You should be OK, aslong as you don't get into boost, but you need a aftermarket ECU ASAP

 

maybe on a piston engine. the old 146bhp nonturbo rx-7's had bigger injectors than that. you must've talked to somebody with a 4 cylinder.



oh and take that wing off before you get laughed out of any Rx-7 meet you go to. I'm not trying to be a dick at all here. You'll have trouble getting help from people because they won't take you seriously if you drive a car with a wing from back in 2003.

 

First off, if you are planning on using this FD as a daily driver you should switch to the stock NGK Plugs. (With your setup I would run all 9s) The race plugs foul very easily if they are used for daily driving. If it is a track only car don't worry.

Are we talking about Injectors or Fuel Pressure?

 

I think he was referring to 42lb injectors, that would be like a 430cc about 100cc short of stocks.

CC = Lbs Per Hours * 10.2

I think, someone correct me if i'm wrong

 

Not everyone has time or patience. I suggest you start by reading the FAQ thread stickied in this forum and reading up on previously shared information that will help you down the path of knowledge.

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/

Then you will know enough to ask smart questions and people will have more time and patience to answer.

 

Ahhh that make much more sense, crazy conversions! 42lbs/hr injectors would be 441cc/min so you were almost right.