It will not go any higher. I fear that the ecu isnt seeing metered air above 83% (measured by safc).

I have increased fuel to the engine and have turned my safc way down due to running mighty rich.

Is there a way for me to adjust the afm's spring or what have you so that air is more precisly metered?? then I can turn my safc back up to normal range hopefully.

Thanx

 

talk to jimmy325i he knows alot about it

 

you don't want to max it out... if it was maxing out then it wouldn't be reading right as any air after 100% would be unknow to the ecu..

 

Find yourself a twin turbo 300ZX AFM. Suckers here will say it can't be done. They say you can't convert to a hot wire setup. But too many people here say too many things on hearsey. 99% of the people here just reiterate the same old stuff and never try anything new. Or even mimic what is going on overseas. The S-AFC is supposed to be able to convert the signal (so can the e-Manage). I've seen it done in Japanese magazines to get rid of the plug that is the stock AFM. It's been done many times in Japan, but I have yet to get the details on how to do it. too bad FC's aren't as popular as they used to be otherwise they'd have more in the magazines. Not sure why they don't do full standalone ECU, but that's a Japanese tuner thing I guess? I'm not sure why they do some things there when we do others here for no obvious reasons. But it can be done and it will be a huge upgrade. Drivability issues? Not sure, but I doubt it'd be a perfect drive around town. Just don't be a candy-*** and suck it up if you want the upgrade.

BTW, within a couple of months I'll be doing this with a RB20DE MAF (I have my reason). It wires up about the same as a Z32 MAF. I'll be getting an e-Manage to handle this setup. I will do a write up. Well, maybe a bad write up. I'm not so good at taking notes.

 

On my 91 TII it maxes at around 82%. Take off the airbox and put the ignition on. Then, push the cone back as far as it will slide. Then go in your car and look at the peak hold on your airflow. It should be 100.

James

 

My AFM just doesnt read anything past 83%. I think im at the mechanical limit. THis may also mean I am at the electrical limit as well.

I am looking into buying a Microtech ECU as they are cheap and pretty easy to use.

 

can you do me a favor and turn the key on and push the door all the way open and see what it says

mike

 

Sure... Do you have a really big hair drier?? My car is under about 6 inches of ice. HEHE

 

I'f you're getting 83% readings and not having any drivability problems then you're fine. If you slam the afm open and it won't read 100% then you might have problems.

My afm will only read 62% when mechanically held open unless the rate of opening it is very quick and then it will max. I think it has to do with some kind of logic circuit in the unit that accounts for temp and rapid change in velocity. I've seen 100% on the s-afc more times than I care to remember from this flaw. My max actual reading is 65.1%. I have seen a 78% but that was most likely a bunk # just like the 100's.

 

I'm also n/a too.... The turbo should be capable of sucking way more air.