Re:open loop tuning?
 

hmmmmm.... i want to know if you can tune in the 02 disabled bin and then just copy/paste it into ng48 ....that would be SWEEET!

Re:open loop tuning?
 

it's pretty tricky tuning part throttle/cruising and idle in closed loop, but tuning boost isn't too hard b/c you're usually at full throttle anyways.

Re:open loop tuning?
 

I just run with the O2 disabled at all times. I have a TD04H that likes to spool up a fairly significant amount of boost at part-throttle and I've seen afrs in the 16:1 neighborhood at 5 psi before with the O2 sensor mucking around.

The only downside I can think of is that the ecu won't keep things stoich on its own while cruising, idling, etc. As long as you tune these areas, it becomes a non-issue.

Re:open loop tuning?
 

What I thought...I always hated looking at my wideband when partial throttle boosting :-\

Re:open loop tuning?
 

Yeah, it's not a very comfy feeling. ;)

Amazingly enough, my car has survived approx. 18k miles of that sort of crap and it's not showing any signs of leaking, smoking or other badness.

Re:open loop tuning?
 

On a very related note, I found something cool today. I think you'll like it.

http://forum.pgmfi.org/viewtopic.php?t=4652

Re:open loop tuning?
 

Nifty :D

Re:open loop tuning?
 

WOW!!!!! that is ------' awesome!!!!!! i will definitly be tring out that bin...thats perfect to tune with and leave on there for good afr's in vaccume...how did the afr's look in part throttle boost? it cuts out 02 trim as soon as it sees boost even at part throttle?

Re:open loop tuning?
 

yeah, mine kept trying to go to 14.7 afrs in part throttle boosting, thank god i have a larger snail so i wasnt doing it too much