Super AFC usage on a Turbo 6

[turbohye]

Hey guys I have a Super AFC unit that was never installed on my DSM many many years back (the unit with the blue vaccuum flourescent screen). I have searched through the forums to see if anyone posted about it yet. AFC are designed to work with 6 cyclinder motors as well and If I am correct, as long as the correct wires are spliced on the ECU harness then it should still piggyback the computer. Does anyone have any experience with this OR have heard about this on a Turbo Buick motor. It would be nice to lean out or richen the mixture at the mid-high RPM. For the time being my alky is fine but Id like to see how well the motor can be tuned without the alky. thx in advance.


P.S I raced a 97 supra twin turbo on the highway (I-95) on the way to Fort Lee and GEEZ those cars are hard to beat on the highway. His License plate said ULOSTSON. He was shook when my front wheel started passing him and when I let off him and his girlfriend got a nice Blow Off from my Buick. I read his lips and I swear he said Monte Carlo WTF? hah Thats one for the Buicks.

 

[turbohye]

Several views but no replies.
If you guys dont know what the AFC is from Apex-I there are lots of resources on the net However You probably would never have to buy a chip ever again since its a piggyback.

Here is a link helping explain how it works. There is a 4,6,and 8 cylinder mode.
Ive run across a guy at the beach who uses one in his blown 5.0.

 

[Mad_Trbo]

Turbohye -

what sort of experience do you have with this unit. I found that it was problematic due to the fact that you don't have control over timing, but what you do have control over is what the ECM see's as air flow.

I know our DSM crowd has seen success with these units, but as I started going for more performance I only found the AFC to be counterproductive. I suggest an ECM / EMS replacement. if this it out of reach then the chip is the next best upgrade because it not only changes how airflow is read, but it changes timing as well. This will provide the safest change.

Tell me about your AFC experiences, by the way one thing I did carry over from my DSM was the AVC-R.

 

[TurboBob]

It will not work on a GN.

Bob

 

[turbohye]

Turbohye -

what sort of experience do you have with this unit. I found that it was problematic due to the fact that you don't have control over timing, but what you do have control over is what the ECM see's as air flow.

I know our DSM crowd has seen success with these units, but as I started going for more performance I only found the AFC to be counterproductive. I suggest an ECM / EMS replacement. if this it out of reach then the chip is the next best upgrade because it not only changes how airflow is read, but it changes timing as well. This will provide the safest change.

Tell me about your AFC experiences, by the way one thing I did carry over from my DSM was the AVC-R.

I had my baby (91 AWD TSI) Talon from back when the AFC was that 1st gen black box. I ran a 12.7 with a slightly built but highly detonating 2.0 but when I later got my 2.3 stroker everything seemed fine until Virginia Beach had that ****ing flood like 7 years ago. I was very mad believe me. Thats back when the block had to be notched to fit the crank and Norfolk Machine billed me the same cost just to mill and notch. I was an Old School DSM'er. My 92 talon FWD which had the FFWD Technologies bottom end (back when it only cost 2200) was a monster on the high way. I sold that to TerboT on this forum. For a FWD to run 13.13 on the 1/4 was a damn good thing. Thanks to the B&M LSD insert.

Nothing is like the monster torque pull from a turbo buick though. I dont think I will ever go back to DSMs. Too many ignorant ricers got into them.

Well thats basically my input on my experience with the AFC. I always used the 1st gen AFC and not the Vaccuum 2nd gen.

take care

 

[turbohye]

It will not work on a GN.

Bob

Thx Bob but this would be more/less a learning experience post for me as well as others so if you could give us some more indepth reason as to why it wouldnt work? thx Bob

 

[WhiteT78Supra]

I can't see why it wouldn't work...

 

[turbohye]

my thought exactly. Im still waiting for some input.

 

[WhiteT78Supra]

Sure seems a lot better than having to burn chips all the time...

 

[TurboBob]

couple issues.

1, I don't believe its compatible with the frequency range of the GN MAF, but I could be wrong....

2, The stock MAF is DONE at 255 grams per second. in order to do injector scaling with the MAF/AFC, the MAF signal has to keep up with the higher horsepower.

3, If you don't do injector scaling with the AFC, then the ECU hits a wall at 255 grams per second. Most chips that are set for larger injectors ramp in a bunch of extra fuel above some RPM, trying to tune this with airflow adjustment would be hit-and-miss, although I guess you could get it to work with a lot of tuning.

4, Many aftermarket chips lock the airflow at WOT to prevent "MAF Dropout". If you use a locking chip, airflow tuning does not work. If you don't have a locking chip, you have to deal with MAF dropout.

Bob

 

[Mad_Trbo]

sounds like an interesting project to sort out if you have the time.

I agree with previous post, I hate the idea of burning new chips until you get just the right set up

 

[GNVYUS 1]

What does a chip cost, what does the AFC cost?
Then add in all the features a chip has in it that the AFC can not do.

Not to sound like an a hole, but save some time as if the AFC was better or more cost effective GN guys would be using it, and a long time ago. But the chips are pretty dead on as its been about 20 years of burning chips for these cars.

By the way, TurboBob is the guy that designed the Translator and Scanmasters for the GN, DSM, Supra etc.

 

[Mike Licht]

If you want an AFC type device that WILL work look at the Translator Pro. It will do far more than an AFC for a little more money. It will also do wideband tracking and function as a full feature boost controoler
MIke