AFC Hack

[girlyon18s]

I always hear about this. But can someone please explain? I hear you can use it for a boost controller also?

[yellowd16]

Super AFC- is for boosted cars

[girlyon18s]

actually the SAFC is for NA/turbo.

I had it on my na civic and now it's on my turbo neon. I'm not looking for a answer like that. Maybe someone that knows can explain?

[yellowd16]

http://www.infinitracing.com/SUPER_AVC_TYPE_R.html

[TheTurboDan]

the safc will not control boost at all, only injector pulses

[yellowd16]

Originally posted by TheTurboDan
the safc will not control boost at all, only injector pulses

yea, dat was my bad, thought of the wrong one

[yellowd16]

Originally posted by girlyon18s
I always hear about this. But can someone please explain? I hear you can use it for a boost controller also?

hey did u look at the web page i put up?

[JoeCivic]

Here's how it works. The map sensor shows ecu boost... ecu takes a shit. In order to prevent this one uses the hack:

1. use injectors that are about..30-40% larger than needed... in most cases 450s work.

2. Set afc to -30-40%

the afc works by altering the signal from the map sensor to the ECU. To lower the fuel, it lowers the map sensor reading, to increase fuel, it increases the reading. So, by having injectors that are larger than you need, it allows you to cut fuel back by a great enough margin that it reduces the boost signal is converted to one that the ECU interperates as vacuume.

This way you still get a pretty well regulated fuel curve (ecu recievs map sensor signal in proportion to actual map... only lowered enough that it doesn't throw a cel.

Make sense?

[civperc]

Lauren - check out this page: http://www.thedropshop.tv/vafc.htm

[girlyon18s]

Originally posted by JoeCivic
Make sense?

Now this makes sense. I kept on hearing about this. I had this problem for a long time with the map. I made a device(radioshack owns)that tricks the map sensor also to keep the voltage from going above 4.5(my car cuts out around there). So same idea then. Thanks for the help guys.

[Wadzii22]

Why the Vafc hack is not good

read that..... then understand what the vafc does, it rescales the fuel AND ign maps to work on a different scale.

it sounds like a good idea at first, it work well for the fuel, but it completly clusterfucks the ign maps