DonWG said:I'm not an expert at burning methanol so don't take the following examples as the limit of what can be done with it.
First engine: 10.45 to one CR. Insufficient fueling. Blew at 31 psi.
Second engine: 11.27 to one CR, mixture read 11.4 on the O2 (calibrated to read out gas numbers) This mixture gave best power. Not necessarily best safe power. Blew at 28 psi.
Can you figure out what the dynamic CR was for the second engine?
Third engine: 9.27 to one CR. Target mixture 13.4 at idle, 11.7 to 12.2 before boost, 11.0 to 11.3 under boost. Target max boost 28 to 30 psi. Preliminary fueling requirements of this engine are down 9% on the injector pulse width from the last engine. This is in the non-boosted regions of the fuel map. This goes to show you that methanol likes compression.
That doesnt sound too off of what gasoline would do. Isn't the rule of thumb for gasoline 4% more power across the board per point in compression? Since power has a close relationship to the amount of fuel used (BSFC), I would think that 9% would actually be pretty close to the same effect as that change on a gasoline engine. You basically went 2 full points lower in CR which by rule of thumb is 8% difference in power. Or am I missing something here?