fyi here is my afr map

well its not clear but the red(most of middle area) is 14.6 the rest is around 13.5 or 13

 

I was debating weather or not to change my lifters, I came to the conclusion that they were ok after a bleed down test, I never had a sound that I would describe as a loud tick, It was definitely valve chatter I could hear all the valves rattling in sync and I have heard this sound since my break-in period. I was just about to tear the top end down and replace my lifters when until after I tuned it the chatter was gone. The only thing I can do to recreate the sound is download a lean A/F mixture and I get the sound to go away when I get it around 14.4:1 and 14.2:1 in some areas.

 

That A/F ratio map was one of the few things I wanted to see on here today. For some reason It will not open.

 

go to page/post 1989'ish on the tts mastertune thread under ignition section on this forum,,,thats where i got that final map to enter in from mr wizard.He told me to use it on my final map

 

head quarters says the bleeddown rate is slower and the percision is higher then the stock lifters. my new stocker lifters were fine when i through them out and replaced with the ops.You could hear a symetrical tap as the lifters slipped off the ramps of my 259 cams with the stock ones??. I dont know what the hell im saying but it worked!

 

Thanks for the information. I may give these lifters a try

 

I will be looking for your feedback fire axe

 

If you run "Smart Tune" all the cells accept a few are changed to 14.6 for closed loop, and the bias is set @ 720 mv across the board.

So if it ran great in "Smart Tune" you were running in closed loop.

 

is that good or bad?
I set a few things to zero ,ran a vtune a few times,set my zero'ed out stuff back and then changed each afr block as per mr wizards map then loaded this as my final calibration in a nutshell. bike ran great very happy right off the bat,but this loud tick was there the whole time util using better lifters.

 

I prefer open loop operation cause it eleminates the o2 sensors. The narrow band o2 sensors only switch back and forth and are not that accurate so i just turned them off by getting out of the 14.6:1 ratio setting. The o2 sensors are also ment to work with 100% gasoline and due to the fact we are now using 15% ethanol this is where most of us are getting our tuning issues. I assumed that 10% ethanol mixture was already taken into consideration with the SEPST software but it was not you have to change you settings to include the ethanol percentages. I did some digging around and learned that at 10% Ethanol, the Stoichiometric Ratio is actually 14.3:1 and anything higher than that is too lean. I also learned that the 2010 and later models are running 14.4:1 with the cat. So now that we are adding another 5% ethanol to the fuel for a total of 15%(sometimes higher due to contamination) the ratio requirements that are needed makes the A/F ratio even lower like around 14.1:1. Iclick mentioned that this sound could be spark knock, at first I was not sure about this but coming across this new information I think there is some validity to that statement. I just hate increasing my A/F ratios as the fuel prices are climbing and dont want to loose performance by retarding my timing so...