It's hard to tune with just a EGT. and by the time you see that the EGT is getting up to or over 1600F damage can been done. You can have high EGTs from too much or too little fuel.
I didn't have a wideband at the time and even if I did a EGT or a wideband can't monitor ignition timing. Your A/Fs can be right on the $$ but damage can still be done with advanced ignition timing.

 

whoops, forgot to add logger.

 

Ur right, but remember, the 2nd gen ECU was programmed for 450cc, So 680's was about it with the safc, i remember on my 2nd gen my numbers were -42 -43 and timing was up tp 21 on pump gas, the car was pulling strong and the motor is still fine with the same setup no AFPR (3 yrs) .. The EVO ECU is programmed for 550's so i believe 680's arent that bad for use with the SAFC and still have room to play.., When i take out the MAF i'll look for the screw maybe is the same design At least the bolt pattern is the same for the filter adapter, i am using a cone filter and adapter from a 2nd gen DSM $30 total... IM thinking maybe 720's 750's are still managable with the safc..

 

Don't take this the wrong way, but some of what you posted is not correct.

About the larger injectors (EVOLUTIONIZE vbmenu_register("postmenu_1943666", true); , 720's are fine);
http://www.socalevo.net/forums/viewtopic.php?t=9180

The ECU will not advance timing when it detects knock. Just log you timing advance, learn to interpret it, and you you will be safe. Read these;
http://www.dsmtuners.com/forums/showthread.php?t=105569
http://www.evotuners.net/forums/showthread.php?t=315

If you don't know what your doing, and how to monitor things properly, an AFC on top of a flash is still dangerous.

In regards to EGT's, scoll down to "High EGTs and Knock;"
http://www.roadraceengineering.com/newafc.htm

A lot of stuff I post is writen for DSM's, but it still applies to us.

 

Nothing taken the wrong way.

but the ECU doesn't advance timing when knock is present, as you stated. It advaces timing because it see not enough air flow through the MAS thus causing the timing advance.

 

back from the dead...

I assume this holds true for the reflash....nothing bigger than 680's on the stock ecu correct?

 

I have used 780's with the AFC and found out that the timing was at 24* at 7400 RPM too high for me. My buddy was running the exact mods I had and his car was a monster on the 780's. Every car is a little different. My car was really touchy when tuning with the AFC. His car was easy to tune and made unbelievable power with his mods. I datalog EGT, MAP, AFR, RPM. I also have a device that allows you too listen to the stock knock sensor and listen for knock as it happens.

 

this is true. Blew a hole the size of a dime in one pistion cause of agreesive timing. (bad aem tune) but A/F read 11.5-11.8 the whole time.

soon as i went through the traps...pop!