black98gsr-t

I've done some sreaching on afc about 300 posts. every body (-) to correct the fuel and this casues the timing to advance so what about (+) the correction if you have the right sized injector or maybe a slight bit smaller. then use a missinglink for the map sensor to hide the boost.. I'm just curiuos I'm trying to help a friend do some tuning.. has any body tried (+) the correction. I'm still goning though the 300 post on afc's so any help would be great. does it still advance timing??

093turbo16

iTrader: (2)

when you use the plus it is almost telling the ecu you are boosting, when you really aren't that much. Know what I mean, if it goes by map signal, if you turn it up you are turning up how much the map is sending. Why you don't go + is because you will throw a check engine light. THe whol point is to take the fuel out so you don't throw a check engine. Then comes the timing....

beepy

2 things wrong with the idea:

1) The MAP signal will go too high and you will go into limp mode.
2) The injectors will have to go past 100% duty which is impossible.

With the AFC, there is no way to avoid the timing issue; you just need to retard the timing (static timing and/or a MSD boost retard) to compensate and keep things safe.

The second pitfall of the AFC is that it is RPM-dependant instead of boost-dependant. I am building a little circuit board to fix that, though. Hack the hack.

hatchback_al

Holy ****, this dudes gonna hack the hack. Be sure to post that **** up! So is an MSD btm a good idea to have if you have the hack? and does it work with just stock ignition?

TeGGY_LS

bump i wanna know too....BTM good idea wid the hack?

91civicDXdude

the BTM doesnt really do anything. If you are retarding say 1 degree for 1psi of boost, and the AFC advances your timing 10 degrees, the BTM retards 1 degree, you're still 9 degrees advanced when you need to be 1 degree retarded.

If you're using the hack, the only way to make it as "safe" as possible is run 10psi and retard your distributor.