I have managed to get the engine running. The engine is standard, but uses a different inlet manifold albeit with the original throttle body.
The ECU is set up to run as Alpha-N using TPS and RPM (no MAP sensor). It will start and idle but the VE table numbers look very odd - it will only start and run with the VE for RPM vs TPS around idle of around 9. I have tried to find the injector sizes - there isnt much info but I believe that they are around 126ccm. I have calculated what the size should be and it comes out at 123ccm so I am in the right area.
I can get the engine to rev if you very carefully open the throttle but it needs a lot of coaxing.
Two questions:
Is there something fundamentally wrong that means the VE numbers are so small?
To get the engine to rev - is it just the enrichment settings or is there something else i should be looking at?
Your injector dead times may be too high, meaning that your actual injection pulse width is longer than what you think you’re commanding. Do you know for sure that your Fueling - Injectors cal. table is correct for your injectors? (I’m not familiar with these injectors, sorry). I’d try lowering the values in that table by about 20% and see what effect that has - you’ll probably need to raise your VE table numbers to get the engine to run with the lower cal table numbers.
Regarding the ability to rev - with Alpha-N tuning, cracking the throttle open, even just a little bit off idle, results in a huge increase in the amount of air available to your engine - your VE at 2% throttle is probably going to be 20 - 50% higher than it is at idle. Try increaseing your VE figures off idle considerably from what you currently have in your VE map. That should get your engine to rev at steady state without going lean. After that, work on your enrichment settings for transients (i.e when accelerating) - looking at your cal file, I’d also increase your dTPS update interval from the current 25ms to about 80ms - that’ll give your more resolution on dTPS rates.