if the m30 is using smaller numbers (all with stock components), it would seem to me that the BMW head is flowing better. or am i all wet here.
rs: If you're flowing w/ the right mixture for the jets you are running then that is just what your head can do.
If you can go w/ bigger venturis and bigger jets and still have a ~14 A/F ratio then that means you have a better flowing head - because it is flowing more air and fuel, but still burning it all.
Cheers
James
If you can go w/ bigger venturis and bigger jets and still have a ~14 A/F ratio then that means you have a better flowing head - because it is flowing more air and fuel, but still burning it all.
Right, I tune mine for high 13's at cruise, 11 at WOT and somewhere in between for on/off throttle.
Here's a question-- It's been said on the board more than once that DCOEs don't like stock (U.S.-spec) compression, and that you also need more cam duration.
Is this not the case, and/or is the DCOE flexible enough with venturi and jet tuning that the compression / cam can be worked around?