I had a look at the coolant contribution and inverse air temp tables. I have fiddled around with them a lot when i was experimenting on this tune a couple of years back but i lost interest at the time. If it is the air temp offsets that are causing the variation, which condition is more likely to be...

Hi mate, only from viewing the screen shot. The first red circle is under acceleration and AE will be in effect. The second one is more steady state. They would also be in different MAP readings which play's a huge part in VE. Given the different intake the manifold fuel part of the acceleration en...

There are some other areas where it does this as well, but if I drop the ve in the area highlighted on my screenshot, basically it causes a delay in the actual afr dropping to meet the target and causes the AFR to run lean when transiting through the area under heavy acceleration. However, it runs r...

I'll post a log tonight. As for fuel pressure and injectors, I can only assume they are okay. The fuel pressure reg seems okay, the fuel pump and injectors are only a few years old. The injectors are super6 ones that i bought from fiveO motorsports a while back to replace the stock 5ltr ones.

At certain load/rpm points my AFRs are different depending on the condition at the time. It is most obvious at 80-85kpa @ 2000 rpm: Condition 1- accelerating and the trace transits through the load point: in order to get my target and actuall afr to match, i have to bump up the ve. Condition 2 - acc...

Yeah I used a chart, I have had them for a while but I remeber the numbers go in reverse for each brand as well just to make things more confusing! I got the bosch ones as ngk didnt make a cooler resistors type plug for efi. I have also used iridium plugs in the past which seemed to do a good job too.

Thanks for the feedback. Unfortunately without putting in a larger cam or forking out for octane booster everytime I fill up, I am just going to have to put up with the engine being suseptable to knock. I have done a couple of things to help prevent it from happening: the tune runs pretty rich in tr...