Wondering who builds good aftermarket ECUs for 86-88 cars where gas octane required doesnt matter. please feel free to ask further questions if nec.

 

All models of the 86-88 RX-7's run with 87 octane fuel with the stock ECU, so I don't see why you would want to spend $1,000 to $4,000 on an aftermarket ECU. What exactly are you trying to accomplish?

 

How much of a gain would you get from an aftermarket ECU and is it even worth buying one, just curious.

 

I guess Iwasnt clear in my question. I meant that an increase in octane gas needed isnt an issue because I have access to race gas. some peopel buy aftermarket ECUs and arent happy in the need for higher octane gas... I want the ECU to improve the fuel and timing maps to be less for economy and leisure and more towards a road race car. They dont cost $4K either... thanks for your help
becky



QUOTE]Originally posted by Evil Aviator
All models of the 86-88 RX-7's run with 87 octane fuel with the stock ECU, so I don't see why you would want to spend $1,000 to $4,000 on an aftermarket ECU. What exactly are you trying to accomplish? [/QUOTE]

 

a few places have them for around $300 or so. Jet is one. can't remember the others. someone else can post a link for ya.

keep in mind everything you do has to be within your class limits. check your rulebook before you start doing stuff.

 

Yeah I've already run this modification through my region for use in PE class and they okayed it on the exception that a tech seee specs or talk to the company supplying it beforehand. This was most likely a kind gesture given the fact that ill be running 88 motor and my car is a pile compaired to some of the feild in PE. i'm just gathering information for now.thank you though.

 

About 10-30%, depending on your setup. The main advantages of an ECU are that it lets you tune the engine for performance as opposed to economy, it allows you to take the most advantage of your mods (FMIC, ehxaust, etc.), and some ECU's let you ditch the performance-robbing stock AFM. Whether or not it is worth the money is up to you. However, if you want to slap a large turbo on your rotary, you will need an aftermarket ECU to run the engine.

I still don't understand what you are talking about. Here is a list of common aftermarket ECU's:
http://www.emergent.com.au/200sx/ecudata.html

Here is the most common aftermarket ECU for racing on race fuel, like you were mentioning. I'm sure that it doesn't cost anywhere near $4K, hehehe.
http://www.motec.com/m800.htm
Oh, and here is the USA MoTeC Mazda specialist dealership info:
Mandeville Auto Tech
Roger Mandeville
350 Simuel Rd.
Spartanburg, SC. 29301
voice: 864-582-0038
fax: 864-585-3353
e-mail: rmandeville@mindspring.com

 

ok those are all stand alones. Now how about chips for plugging into stock ECU. Im just pooling my data to make the best economical descision. Thanks for your help so far.

 

Here is a list of PROM update manufacturers:

G-Force: http://www.gforceengineering.com/. But I just visited their webpage, and they are out of business, officially.

Powerchip: http://www.powerchip.com.au/. They are located in Australia but they have dealers here in the US.

MD Racing (same as Superchips): can't seem to find the MD webpage now, but try www.superchips.com. Same thing.

Authority: if you can find it.

Jet: http://www.jetchip.com/.

I don't think anyone of them has a firmware for race gas. I think they only program for premium pump gas, but you can ask them if they are willing to customize.

Jay

 

the use of race gas doesnt matter to me. i just wanted to point out that octane needed doesnt matter, whatever it takes. I just want the best bang for my buck and wanted some numbers to comapair and hopfully personal opinion. Ive never shopped for such a thing before
becky

 

Ahhh, you want a chip, not a an ECU! :p

Well, I think that Boosting_FC pretty much covered the chip thing. I don't like them because I think that a Haltech E6K, Wolf 3D, or TEC II is a much better "bang for your buck". If your racing class does not allow for an ECU, then I guess you are stuck with the chips as your next best option. If your car is really that much of a "pile", then I would imagine that some of the leading drivers in your class would be willing to give you some tech tips.

I think I finally understand the octane issue now. (I'm kinda slow, so that's why I ask a lot of annoying questions). If the rules allow for racing fuel, then you should use it. Otherwise, you will get the most power from the lowest octane pump gas that doesn't cause knocking.

 

I have heard that for 86-88 Turbo ECU's, no chip really adds any performance, it may only slightly alter the timing and remove the FCD.

The 89-91 Turbo ECU upgrades alter fuel maps, but this is not true for 86-88 ECU's. The series 5 (89-91) gain about 20 horsepower more in chip upgrades because of this.

 

forgot to m ention, my car is non turbo
Becky

 

Check out the APEXI POWER FC. And the other guy is right about the octane thing. Run the lowest octane you can get away with.