So have a new project car that I am trying to tune with period correct parts. The car is a 1987 Chevrolet Sprint Turbo with a 1.0 turbo G10 engine. What I plan on doing is running the boost up from 7psi to around 14psi. I have a old school manual boost controller I have added along with a bosch boost gauge. A non period correct AEM wideband and as a last step I want to add a SAFC controller by Apex'i.

This Apex'i is the device I have so many questions about. Its the oldest fuel controller I think as its the one with the dials no the lcd screen. The wiring I have figured out i think....

This the original pdf for the device.

Apexi-SAFC-5 Button Manual

So the car I am installing on is not in the manual but looking a the pin outs for the sprint is as follows.

ECU wire / AFC wire

+B Main relay power / Tap RED wire.

VS Air Flow Meter / Cut connect YELLOW Wire - WHITE Wire to Air Flow Meter

E2 ground / Tap BLACK wire.

Blue wire not used from AFC

My big question is what to set the dip switch settings to as well as the Car number dial?

There is no real info I can find for these dip switches and what they do other than what the manual says to switch it to. It does have Suzuki listed but I don't the Cappuccino has a Vane meter like the cultus/swift/sprint does. Not sure if one of the dials is for this or what? Does any of the old hands at tuning back in the day remember how these worked or has an install done on a car not listed?

Thanks!

Found some additional info from Apex'i forum.

Can the Super AFC be made to work on a vehicle that is not listed on the Vehicle Specific Application List?

Our application list covers all the vehicles that the Super AFC has been tested on by our engineers. It is possible that there are vehicles not yet tested that may work, but we cannot provide any support ( ie. wiring diagrams) for those vehicles. The AFC has multiple preprogrammed air flow meter maps inside the unit. The unit reads a 0~5V signal from the air flow meter and cannot read any signal beyond this range. If the AFC is used on vehicle equipped with an air flow meter outside of this range, the unit will not respond thereby creating a dangerous situation for the engine. The air flow meter output signal needs to be properly measured on an oscilloscope and compared to a vehicle on current application list. Apex can offer no support nor accept any kind of responsibility for improperly installed units. Please consult with your local dealer and our website for up to the date information.

Update:

I was able to connect the unit to the car but the buttons are not flashing so I dont think its getting a rpm signal. If anyone else is old enough to remember using this product or has oscilloscope experiance I could use some help!

Thanks!

I made some progress but no success yet. I discovered that the rpm signal should flash with rpm so either the safc was broke or the rpm signal wasn't working as intended. I checked the rpm signal with a meter and verified it was sending a signal. I also double checked the wiring. I found no issues in the connections. I then decided to try to boost or convert the rpm signal after doing some research I found the following.

https://www.summitracing.com/parts/dak-sgi-8e

Apparently I got the last one? Anyhow my summit order arrived about 6 days ago and I finally installed it yesterday. And partial victory the car starts and idles but won't rev. I have disconnected the vaf/maf input output and it runs and matches the rpm. And looks like this now.

https://m.youtube.com/watch?v=Wq5WWqrfFcM (not my car but same reaction)

So the final issue is the vane meter is putting out 5 to 7 volts from 1500-4000rpm. The safc 5 dial only modifies or reads 0 to 5 volts for the Maf signals.

So I am looking at modifying the signal down from the vane meter to the safc then back up from the safc to the ecu.

Does anybody have experience modifying voltage like this or know what I could use to do so?

I'm bumping in hopes of someone being able to help, as I think your project is way cool. Unfortunately, I'm no help.

Hey thanks! Much appreciated!

Is that my old apexi? Glad to see it hooked up and being used if so! 

Sorry i got nothing else for you. 

In reply to Dusterbd13-michael :

Yes it is! And maybe it will! I've been researching step down/up voltage converter in hope of it being able to change the voltage on the fly so the ecu, vaf, and safc all see the correct voltage.

Looks like i will be trying some converters.

This was all for not and did not work. Ended up going another way with a greddy device iv.

sorry man. guy i got it from swore it worked. then it went in my box.....

No help but I owned one of these from 1993 to 1997.  Made for a lot of memories when we lived in Pittsburgh and Akron during those times.  Not comfortable but loved being able to reach back and open the gas filler door without getting out of the car.  The intercooler was about the size of a sandwich and I loved the overly enthusiastic BOOST light on the dash board!