rexset

I just start to work with the AEM EMS , and I will post all the info posible.
I have a cal file that I think is good for Street port and for use it with only 8 psi,
take in mind that every RX-7 is different so my cal file is only for referece.
I'm using the Oem o2 sensor , but I will boy the wide uego ,take care that the cal file is seting for that o2 sensor.

Now I have a problem in cool start , with this cal file , but I think that I have to add a bug in the warm up enrichment table

z8cw

Thanks for sharing.
Against the base map, I see you changed the fuel map and fuel difference map ever so slightly. Did that make a noticable difference. You upped your idle, enriched fuel and target map to keep her running. I had some success with changing the entire fuel map to leaner. Spool improved dramatically. The car was running very rich everywhere. I don't have my map anymore since I went single and car is in pieces right now.

Good luck
Claus

rexset

I have a new map now , I add some 15% more fuel at hi rpm, cause my car is ported.
I adjust the idle, now the engine is at 900 rpm like a rock, and add some fuel in the warm up enrichment table , it still hard to start at cool but less than with the base map. Plus I set the 2nd cut at 4200 at idle and the ing cut at 8000.

In case what happens with your car, Claus?

I will attach all the advances that I will have in the maping of my car.

rexset

I make this 2nd cal file , with more fuel , and now I'm only runnig with 6-7 psi , and is a very fat cal , but it is a good starting point , and the main reason is that is a safe starting point.

DCrosby

You're the guy from Chile that asked me how to tune the AEM... Right !?

Either way, in your case since you can't get a tuner out to your location, maybe post a dyno run, and AFR's on a wideband, and possible a couple of logging paramters like sparc advance, etc... and send it to AEM, and tell them your situation as to getting it tuned.... maybe they'll tell you what to adjust...

A lot of people here will be able to look at those graphs and give you suggestions...

rexset

Yes. I'm the Chilian (:

Yes I will , but I'm still don't have a UEGO wide band 02 sensor, so make a log file without the A/F ratio loging is not very useful.

The good thing is that I will buy one very soon , so as soon as I get it i will uploads some logs files , and better and more pricise cal files.

z8cw

Allright man,
We will wait for you having the wideband. Just as a thought. My motor isn't ported and I don't know how it will affect your A/F but the base map were already very rich. I am surprised your car runs at all with even more fuel. The turbos probably spool up very slowly. In any case it is better to be save than sorry.

Good luck

By the way, the AEM forum isn't that busy for the rotary but there is more action and knowledge to be had.

Claus

gzon

before you start take a look at the ign. timing on the base map. It really sucks! these AEM guys has really shown their seriosity here. Campare it to a stock PFC map and you will se up to 25 degree lower ignition on leading and 40 degrees on trailing on some low loades. Running that map you will have a fuel ecconomy like a 18 litre W16.

My suggenstion is take a PFC map and redo whole aem map like the PFC.

Good luck. BTW it could be interresting if anyone get to run the aem properly. Mine is just collecting dust under my bed......

DCrosby

Same here... untill I have a single there's no need to put it on and tune for 30 rwhp... too much $$ and not enough Bang or maybe one bang is enough

rexset

I have the one turbo exhaust manifold , and I will buy the best turbo for my car , I'm thinking about buy a Garrett Gt40r or a Gt45r and a 50mm HKS wastegate.
But First I have to calibrate the EMS perfect with the standar twin turbos.

I'm don't really know how to tune properly the ignition of the car , but I hope that a guy that know a lot of RX-7 (30 years of experience) will help me in a few weeks , as soon as I get an answer an explanation of that.

But for the moment I have my car stoped. I don't want to take eny risk with my very expencive engine.

Sub_Zero_Cool

I'm currently trying to get Jason Siebel from AEM to tune a friend's car. It runs great, still working out the bugs for the stock twins. My car just dies on me when I brake sometimes, anyone know why?

benzguy

I don't have an rx7, but if you're venting your BOV to atmosphere, and you let off the gas and clutch/brake, you can stall because of being too rich. The metered air is getting blown to atmosphere and the ecu puts fuel to match the blown off air that never gets there. Hope this helps :P

maxpesce

WRONG-O, fd's do not use a MAF, they use a speed density system w/ a MAP sensor that is located well past the Turbos and BOV - in fact it measures downstream of the throttle body so only the air that goes through the throttle is measured.

The stalling is most likley from cutting off too much fuel when the throttle closes - if the AEM map is anything like the stock ecu's it brefly shuts off fuel completly on close throttle to help prevent 'afterburn' (Backfiring) The early stock ecu's suffered from this problem also, and the later maps used a shorter cut interval to cure it.