Quote:
Originally Posted by roflwaffle
Well, I've read a lot about pumps at least. 
The main idea though is that wear and thinner fuels almost certainly retard dynamic timing, so increasing internal pump pressure is better than nothing. On a slightly related note, this is also why people with VE pumps on biodiesel may see better or the same mileage even though biodiesel has less energy per gallon. With a more viscous fuel, the advance mechanism works closer to stock spec. Ideally if you can check timing you can compare a change in that to mileage, but even w/o checking it you can still make small changes and see if anything improves, using the normal timing to fine tune.
I don't know if anyone has measured changes in IP pressure to EGTs, but it should help, along with excessive clattering, in determining if you have too much advance. |
I had not thought about fuel viscosity changing timing. That introduces another parameter, fuel temperature.