Quote:
Originally Posted by KarTek
To get the best mileage, you'll basically have to re-engineer the whole car. Start with the body. Lower it, install skinnier tires, things like that. Find out how much power it takes to move it down the road at your desired cruising speed. It will probably be something like 22-25 HP.
For the engine, a turbo isn't a bad thing but NA may net you a little better economy because of the higher compression.
You'll need to come up with BSFC (Brake Specific Fuel Consumption) curves for the various engines you're interested in. Find one with the lowest BSFC for the HP needed to move the car down the road at the cruising speed. The graph should also show the RPM where this takes place. Then set up the cars gearing to have the engine run this RPM at the desired cruise speed.
Since I'm not an engineer I would have to come up with this information by trial and error but someone smarter could probably calculate a few things and come up with the best engine combination. Perhaps there is a dyno database on the web somewhere with this info...?
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does anyone have the BSFC for a 300D turbo engine? Is this normally given for the engine or the entire car system? I feel with lowered RPM cruising at 65mph max I could realistically get in the 35mpg range. Right now the car cruises at 65 at 3000 RPM, i would like to get the cruise RPM down around 2200. I only have one gear lower to go 2.88. that change only gives me around a 200 rpm drop. right now Im thinking of adapting a 5spd from a 190.
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1982 300CD Turbo ( Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)
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