Stage one... again

Cam bearings were just within spec. So cam is now in.
Strangely piston to valve clearance was not sufficient to use the higher ratio rockers. It cleared, but not by enough to allow for heat and wear. Others have been able to get larger 23x duration cams in without fly cutting the pistons however I did note that my 0.006 spec's are very close to the larger cam specs at that lift. Perhaps due to high and fast lift. I just checked against the F13 cam and the crane has a later IVC and more 0.006 duration. So I guess that answers that. It must have slow ramps.

Anyway, car would not idle initially, I gave it 20% more RAF (Desired Airflow), still not good, so 20% more and once slightly warm it idled ok. I did a half baked log to check for idle air, but had to keep the throttle open to get it to run without stalling. Once warm it was fine, so Ill have to relog when cold. Its likely even more air is required.

Inital idle spark was 9 deg for some reason. It should have been over 20, so I will need to log some more and see where it got the 9 from. I overrode the spark with the bidirectional controls and got an idle map of 38kpa with around 34 deg spark. The engine runs crap with 9 deg spark, no wonder it was stalling.

I think the shop must have pushed the WB02 recall button, you know, the one with the red LED that nobody should touch, while wondering what it does. So anyway no chance to do any VE tuning as you cant recal the WB02 until the car has sat for 8 hours or you unscrew the unit from the exhaust and recal in open air. Suffice to say Im waiting 8 hours as its windy and rainy at the moment.

I drove off with my idle kind of ok except for coming to a stop when if I turn in on the power steering the car cuts out. Might need some cracker action or possibly even more air as mentioned above.

Next issue is due to no view of AFR I logged NB02 voltage as a kind of rough view on things. It turned out I was running over 1V constanly at low MAP (ie) very rich. Miles to go was falling like seconds on a clock. I pulled over and made some adjustments until the voltage was visably moving around. I drove like this for a few miles to check that the O2's were still working ok then turned on semi open loop fueling in custom os3. Basically if you command 14.63:1 the O2 sensors will trim the fuel to stoich. If you command any other values O2 feedback is not used.

This worked much better allowing the car to run pretty well. The STFT values showed that the VE table was out as at idle they were -15% and at some points +10%. This will be sorted out when the wideband is working again.

I swapped in my old spark map as the GTS table was showing up too much KR. Maybe due to the increased compression ratio or 95 Octane fuel. Lots more experiementing needed with spark and fuel.

In fact VE is fairly easy to dial in when you have a working wideband. Idle will take me a bit longer and spark will take the longest. Ill have fine tune it in on the dyno.

Af far as how the beast goes now. Im not sure. It feels at least as good as it was before and slightly beefier in parts. Nothing major. But Ive kept out of enrichment so far and its in a pretty basic state of tune. Idle is quite sedate, nothing too hairy. If it wasnt for emissions compliance I think Id go for the popular 224/228 comp cams grind.

More info once fueling and spark is dialed in further.