karlo wrote:I have run the Maserati C114 odd fire V6 successfully with both fuel and ignition. This engine is very similar to the PRV (both are 90/150), so you shouldn't have any particular issues. I have run them with a single trigger wheel running at cam speed, and crank speed trigger wheel + cam trigger (just a crank trigger wheel won't work, as you need to know the phase if you want to run ignition). Both single distributor and dual distributor work (although single dizzy has a dwell issue, that I have reported). I haven't tested COP, but I expect that should work fine. Wasted spark will not work on these engines.
We are still having issues apparently.
We ran the engine with a 36 tooth bottom trigger (no missing tooth) and single top cam trigger. The engine would rev lovely up to around 4000rpm then power would just drop off to almost nothing for the rest of the rev range, and this was on the dyno at castle combe, not a mapping issue, as the fuelling and ignition remained fairly steady. No loss of sync or anything obvious. Is this the dwell issue perhaps?
There was actually an obvious falter at around 4k...
Next we tried removing every other tooth from the bottom trigger (crank), left cam as single trigger, to make an 18 tooth wheel, now the engine struggled up to around 4k (almost no power) but then went like a rocket, making nearly 400bhp on the dyno. So now the top end is OK, the bottom end is not right.
We have now gone to a 36-1 on the crank and single cam trigger, and the engine runs, but we appear to not be able to time one side of the engine up. Once side is dead on the commanded advance up to 7k, the other side is 60* out.
Also, the plugs on the right back are one colour., the ones on the left are a diff colour, indicating that one side is firing 'on time' the other at a different, again pointing me at the oddfire stuff not working correctly.
We are using 3.1.0 release.
Could you send over your maps you used so we can at least go from a goo starting point, and what version of code were you running?