Quote:
Originally Posted by cfg83
My DOHC has a different BSFC map than the SOHC :
http://ecomodder.com/forum/15008-post4.html - Post #4
I don't have the BSFC map for the SOHC. I should find it. However, even if I did find it, I wouldn't know how to interpret the differences,  . |
Quote:
Originally Posted by cfg83
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It would be pretty hard to find the optimum speed to drive at for highway mileage, but assuming you were able to reduce Cd on your car enough that aero drag was less of an issue, I bet putting it near the center of the sweet spot on that BSFC graph would be about right.
55-65% Load (perhaps 18in/Hg vacuum) at 2500rpm might be ideal.
With your actual tires, speeds should be as follows:
Code:
RPM MP2 MP3
2000 58 48
2100 61 51
2200 64 53
2300 67 56
2400 70 58
2500 73 61
2600 76 63
2700 79 65
2800 82 68
2900 85 70
3000 88 73
I somehow doubt you can do 73mph efficiently in a car that isn't shaped like a needle -- looks like the MP3 gear might be better in some ways for that. The BSFC "sweet spot" seems to extend down to 2000 with room to spare, so maybe your best mileage will be at 60ish.
If the car feels absolutely powerless on flat highway at 2k that's probably too low. Aero would help.
50mph is probably too slow though.
Quote:
Originally Posted by cfg83
In terms of safety, under an emergency, I would have to downshift to a lower gear no matter which 5th gear I have, so I don't consider it to be a critical issue.
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What, in case you have to go really fast because your wife is in labor?
-Chris