Will a "apexi safc I" give me enough room with tuning to run 750cc injectors on stock turbo n332 ecu? Will i definitely need to install a fpr or just a high flow pump? I figure since the safc allows you to tune the afr based on rpm i wouldnt need to use a fpr. Unless i hit a bad lean spot? hmm...

Just got the 6port turbo running , trying to get it to run richish with an safc tell i can get another rtek 2.1... Dont even plan on running more than stock boost... I need a BAC cause my idle BUMPS! haha, maybe i could adjust the idle to like 900 for now?

I was able to start the engine with 4 750cc injectors without the safc set up. It ran but would cut out for a second when accelerating then catch and you could rev the engine higher. I may just want to put the stock turbo injectors back in, but i figure if i can get the 750ccs to work with the safc it would be a way better setup and i would be able to have a wider range of tuning for afrs.

MAybe just maybe the cutting out is just do to sparkplugs. anyways thanks

 

Trying to work on this sometime today..

 

the SAFC gives you room for 50% of correction factor to the AFM signal so, with stock injectors you have 550X4=2200cc's of injector. with 550X2 and 720X2= 2540cc's of injector after the switch.

50% correction of 2540cc's is 1270, well below the 2200cc standard mapping.

going to the extreme is not a good method but theoretically you could run 4400cc's of injector and still be able to tune it down to factory fuel requirements once the secondaries are firing. the larger the correction is, the less accurate your timing curve will be.

the stock fuel trims are a bit on the lean side as well, so your buffer is going to actually only be between 0-10% correction technically for a safer tune.

 

So what should i do then? I have 4x750cc injectors and i was able to start it and it did the 30 second warm up sequence and had a huge 500rpm idle bump. i tried my stock injectors and the engine wouldnt even run. it tried to start but just wouldnt quite get there, Im not sure what the deal is. I lined up the leading mark on the pulley and pulled the cas out and lined up the dot with the casting mark on the lower part of the cas. Im not sure why its running odd, Maybe someone in WA Seattle area can give me a hand?

 

First, remove the SAFC when trying to troubleshoot. .

The simplest would be to put the stock injectors for the ecu. Stock turbo injectors are 550 cc's and the correct impedence is based on whether or not you have a resistor pack.
If you can't get the stock ecu to run with stock injectors, something else is wrong.

Get a turbo or FD fuel pump. They are fine for stock boost. Other high flows pumps mess with fuel pressure.

 

Ok thanks, Will a poorly adjusted tps cause the engine to have a high idle with a bump like very high rpm idle 4-5k
within 3000-4500k bump? This engine does not have a bac, im thinking having one will help a lot? I only have a n/a bac, will it work?

 

So i re did the cas timing again for like the 10th time just to make 100% sure i had it in the correct spot and it was. So next i looked for vacuum leaks, didnt find any. Then i unhooked my safc and tried starting the engine, it would start but it wouldnt idle. Im thinking my tps is not in the right spot. Im def getting fuel because when the safc is in it waaay over fuels it and the engine revs high. I left the 750cc injectors in because i believe my stock injectors are faulty, i couldnt get the engine to cough when i had the stockers in.

I have tried a lot of stuff now, im just not experienced enough yet with the rotary. It must be something simple thats very critical. Heres a lame video, <iframe width="560" height="315" src="//www.youtube.com/embed/v23KQxBqkgo" frameborder="0" allowfullscreen></iframe>

it ran just for a second after the warm up sequence was complete then torwards the end i plugged the safc in and it was weird cause with the safc it idles really high and because of the high idle the safc adds more fuel which brings the rpms up even higher and so on. I shut if off before anything too crazy happened. sorry my phone ran outa space in the end

 

sounds like a large vacuum leak or extremely low fuel pressure.

 

Im getting pretty close to giving up on it. I cant get it to start at all now no matter what i try. I have adjusted everything to spec, put the stock injectors back it, unhooked the safc. i compression tested it and it checked out good. I checked all my blockoff plates and they are all sealed with no leaks.. When i pull the injectors out loads of fuel comes pouring out, so its getting fuel but im not sure what the fuel pressure is. It doesnt make much sense to me....

 

Im willing to throw a little cash someones way if they can come help me get it running right.