SO just curious i remember hearing before that the idc displayed in the fic isnt accurate, anyone know anything about this? Since i still have my fic ive been playing around tuning the car n/a before its boosted again in another week. Im using the stock injectors and have seen the duty cycle hit as high as 83% in the 5800-6200 rpm range. Ive dialed the afr in perfectly at 12.8-13 across the power band tapering down to 12.6 -12.8 from 5200-6200 rpm - the car feels MUCH better - but to get the afr where i want it im actually pulling fuel (around 4-10%) yet im seeing 80+% idc, doesnt really make since.

 

iv wondered the same thing

 

haha when i was boosted previousely i think i remember it hitting over 100% idc - i was like hmm thats very logical lol My injector magically opened more than 100% of the time

 

lol...yeah

 

If it is over 100%, doesn't that mean it is going static? Doing that generates a lot of heat and can cause injector failure.

 

Going over 100% is a physical impossibility lol - thats the whole thing - i dont think the idc readout on the fic is correct and i believe other people have come across this before. Also it doesnt seem logical to actually be PULLING fuel and getting over 80% idc on stock injectors N/A

 

shouldnt your afrs be a little richer than that? how many lbs you running? i thought you would be around like a 10.4 to like 11.5 afrs at WOT on a piggybank

 

that would be the desired afr for boost not N/A hehe :D itssssalll good

 

Bump for an answer Anyone know whats up with this - ive seen it on multiple fics now lol if you run an all 0 map on a bone stock tc youll see nearly 90% idc - def not right lol

 

you know iv seen a 0%idc @ idle on 2 turbocharged tcs...I would think that 0% means its not running...idk maybe its just too low for it to read?

 

0 means no change, i.e. left stock.

 

with 550cc injectors running 13afr or stock injectors running the same afr @ idle?

i had a friend of mine who didnt like the fact he was running 15-15.5afr @idle so i played with his 02 map to try and find a sweet spot (14.7) at first i got it in the 13s but the idc didnt respond to the changes...i think when rev'd in neutral it would go to 1% on each injector but thats about it...i never however viewed his idc while running on the street...

 

I have noticed some inconsistency in the injector duty cycle readout on the FIC. What I will usually do is try to calculate it manually instead.

This is a pretty in depth calculator:
http://www.stealth316.com/2-calc-idc.htm

RC has a less sophisticated calculator too:
http://www.rceng.com/technical.aspx#...tor_Worksheet_

 

This is why Paul is the man!

 

thanks paul