Quote:
Originally Posted by ForcedInduction
I got up to 28* and it was harder to cold start so I backed down to 26.
When I had the cut delivery valves installed, the engine would bog down and rattle like hell if I floored it below 2000rpm. They may have just been quenching the flame with too much fuel but I know altering the delivery valves also alters the injection timing because of how it changes fuel flow. How much, we don't know yet.
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Interesting that 4° over stock will already affect the cold start. I have to bump up the SD and see how it does.
You really cannot have "too much fuel" unless it's putting out significant black smoke...........which you might have without the ALDA. In that situation, it can certainly bog down if the fuel is excessive.
Those valves certainly affect the timing..........possibly more than you can realize. I don't see any good way of determining this value, however, other than a lot of testing with greater "retarded" timing settings until the engine performs in similar manner to stock.