I want to see if I understand this correctly....I have searched on this topic but haven't found anythiong to answer my questions...
From what I have read, the SAFC2 can tune for every 200 RPMs for 12 pts. So if I want to start tuning from 4K RPMs, that means I am only able to set values up to 6,4oo RPMs (assuming I am tuning in 200 RPM intervals)?
My other question is...if I decide to tune for every 600 RPMs instead (i.e. 5K-7.4K)...will the SAFC2 interpolate between consecutive points to give a value for a middle point? In other words, if I set a value for pt.1 @ 5K RPMs and another value for pt.2 @ 5,6oo RPMs....will the SAFC2 only correct exactly at those points or will it also automatically give and avergae for a point in-between those 2 points? Please excuse me if I'm not expressing myself correctly. :squint:

Manny

From my understanding, and from how I've seen my car behave on the dyno, the answer is YES, it does interpolate in between your correction points.

Manny, you are correct on the both cases.

It doesnt really find an "average", think of it as a Line Map....it creates a transition in between both points of correction.

Allan

Manny, you are correct on the both cases.

It doesnt really find an "average", think of it as a Line Map....it creates a transition in between both points of correction.

Allan
Like a trend line between the 2 points..correct?

My friend had an SAFC-2 he imported from japan before you could get it here. I think he didnt know how to use it either. It blew up. heh

Like a trend line between the 2 points..correct?

correct. you can also just adjust the increments differently in certain problem areas. I have mine adjusted in 200rpm increments in some places and 400rpm in others. this allows finer tuning.

indeed it will interpolate between points, but you wont be able to start at 4000 rpms.
each Ne point has a limit as far as how high or low you can set the rpm. what i did was set the first point at 800(for idle), second point at at 3000 rpm, third point i have set at 4000 prms and after that is where i fine tune. so you should have 9-10 rpm points to fine tune with. see if that helps

Anyone know if the harness from SAFC1 will plug into the SAFC2?

Another thing...
I was looking at Charlie's SAFC threads but couldn't find anything regarding to where the purple wire (knock sensor) on the SAFC2 hooks up to on the ECU anyone knows?

Another thing...
I was looking at Charlie's SAFC threads but couldn't find anything regarding to where the purple wire (knock sensor) on the SAFC2 hooks up to on the ECU anyone knows?


the safc1 does not have the knock feature thats why there is no mention of it.

the safc1 does not have the knock feature thats why there is no mention of it. for a 91-94 se-r the knock signal is at pin 54 of the ecu and is a white wire. if you are looking at the harness pin 54 is the thrid pin from the right side on the connector on the top row
I have a b13.
So the knock signal is located at pin 54...just like a b14? I thought b13 & b14 was different. :confused:
SO if I look at this wiring diagram provided by Charlie, pin 54 on the connector is....
http://floridasr20s.com/gallery/albums/Manny-s-Album/untitled3.jpg

BTW..thanks for your help with this matter :biggthump

edited for stupidity :rofl:

I'm sorry...I just don't have the b13 harness layout with the numbers...can you point out pin 54 on the diagram Charlie provided? I'd appreciate it :biggthump
That is the harness layout b13 users use to connect their SAFC. I located all my wires using that diagram & so far it is all on point.

you can check the knock sensor signal by starting the car and allowing it to idle. the signal will be between 2-3v at idle. It looks like the diagram I have in front of me may be for a b14 but I have the b13 fsm at home and will get it when I go out for lunch. if the diagram you have is working keep using it.

you can check the knock sensor signal by starting the car and allowing it to idle. the signal will be between 2-3v at idle. It looks like the diagram I have in front of me may be for a b14 but I have the b13 fsm at home and will get it when I go out for lunch. if the diagram you have is working keep using it.
I'd appreciate it. I want to finish this SAFC install by the end of today. Thanks :biggthump

no problem I will get my fsm from home. for some reason the on-line version I have access to is missing the ecm harness lay out for the b13 so I cannot verify that the diagram I have printed is not a b14 layout. :biggthump

when you attempt to set the knock levels it will be obvious whether you wired it properly or not.

I have a b13.
So the knock signal is located at pin 54...just like a b14? I thought b13 & b14 was different. :confused:
SO if I look at this wiring diagram provided by Charlie, pin 54 on the connector is....
http://floridasr20s.com/gallery/albums/Manny-s-Album/untitled3.jpg

BTW..thanks for your help with this matter :biggthump


this is the correct diagram. the one I had was for the b14(sr20de).

this is the correct diagram. the one I had was for the b14(sr20de).
So is that where the knock signal is on the b13 wiring diagram?

So is that where the knock signal is on the b13 wiring diagram?


yes the diagram is correct. you can always test it by checking the voltage at idle it will be between 2-3 volts