I am not sure if the injector correction will work with the size of injectors, when i first installed the injectors i couldn't make my car run, but there were a few issues that i solved after I reinstalled the stock injectors. 1) The anti engine stall feature cannot be used, it completely freaks out the computer and throws MAF codes and the idle becomes extremely lumpy. 2) The RX7 injectors i am using are alot longer than stock which i didn't take into account the first time i installed them and i believe since the tip of the injector was so much further into the intake manifold the fuel was hitting the wall of the manifold and rolling/dripping into the engine instead of spraying. I think i will get the new pump in and just tune as best i can for now and in the next few weeks i will try reinstalling the injectors and removing the FMU, i think i will also wire up the ignition harness on the emanage.

 

Yeah, I think you're really going to need that pump to meet your fuel demands. If the stock pump was even keeping up I don't think it would have continued for very long. There is that problem with larger injectors. I still haven't gotten resolution for my problems, but I'm hoping the guys at TTR will be able to. I know omarboy25 is running 550's so it's doable, but it may not be easy. My car is on 440's with a Walbro 255lph and AEM EMS standalone.

 

Just have a few questions: Is the e-manager running good for you right now and what features or harnesses are you using to tune with it. Also wondering if you got the 460 injectors to run and what you had to do. i ask cause i have a similar setup im going to install soon with the 460's from an rx-7 and a e manager.

 

I have just the emanage main harness and a custom harness for the injector control installed. I do not at this time have the 460 injectors installed but i think i will be doing it in the next week our two. I just got my walbro 255 pump installed and have done a little tuning with the emanage. My afr's are 14.5-15 off boost and i have got it down to 11.5-12 under boost with the little tuning i have done with the emanage. I will be going out this weekend and trying to get a consistent 11 - 11.5 AFR under boost. I will post how the injectors go when i have them installed, like i posted earlier the first time i installed them i flooded the engine before i could get it tuned and had to revert to stock injectors. I will also have the ignition harness installed probably next week or the following.

 

emanage works well if you need to add fuel. My problem has been twofold: first I need to remove fuel (staying NA) and the instructions used to be "load map. change real time." and now the mantra is "export once. import everytime. change real time" We'll see how well this new method works.

add fuel using the additional injector map and you'll be fine Dave at RPW swears by the eM for FI tuning if you're not in need of a standalone.

I think the eM can compensate for injectors that are 200% bigger than stock.. but you should check out emanageusers.com/forums and the yahoo group

 

Im frequently at the yahoo groups emanage site and there is big debate about the size it can actually control, but specs do say 150% larger, some people believe this means you can control injectors 1.5X the size others believe it means you can control injectors 2.5X original size. With the new injectors i am sure i will need to be removing fuel and if this doesn't work with the emanage and ecu that really sucks. I was hoping to use the injector correction factor and tune from that. I guess ill find out in a few weeks, i may have to go standalone, which i don't really want to do at this point, or I do also have the option of getting smaller injectors too.

 

it is 1.5X... been there and tested that...

Biggest i was able to correct out on the lancer were 370cc's without the car being uncontrollable at idle. Everywhere was fine on bigger stuff but idle and low rpms suffered highly after that size.

On my 1G it was 660's... tried 750's but couldn't get the idle right again... had to step em down.

All this was done with the auto correction table... thus you should be able to do that as well and just use an FMU for boosting fuel pressure when in boost. Trust me it works... You'll find the 440's will be impossible to tune down low with the emanage without raising your idle to about 1200rpm.

 

so how much psi do you think you could have before you have to go with bigger injectors. using the emanager, fmu, and walbro setup.

 

I don't KNOW that it won't pull fuel- keep your pants on. I'm hoping that the bad instructions I was given are to blame. I'm going to try the "export once. import everytime. change realtime" thing and see if that doesn't work.

 

I'm finally getting what your saying engineerboy...

I learned the same lesson... change realtime... export to make it stick. Save map so that when you reopen program you load that map in or you have to import everytime... change realtime... then export to make it stick.

In the beginning i kept doing the same thing... logged on...made changes and thought wow this is great... closed everything and then felt that it just wasn't the same. Found out later about having to export the changes to keep them. Doesn't say anything about that in the book. Such is life...

 

Im running 8 psi on my setup with an afr of about 11.7 and injector duty cycle at 65% according to the emanage. Im sure i can still add enough fuel to get to a 10.5-11 AFR with these injectors but the duty cycle will probably be around 75% or more.

 

your fine up to around 85%... if you go past that you stress out the injectors and could get a stuck one.

 

I guess if you export more than once or change any of the parameter settings you FUBAR the whole thing and none of the mapping sticks and you have to go through the setup again. So it's "export once. import everytime. change realtime."

I'll keep everyone posted

 

Said the same thing about the SAFC unit, but it has controlled my 460cc injectors just fine (stock was 210cc) which is almost 220% bigger.

 

AirQuez: off of what car or what brand of 460 injectors are you running.