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Originally Posted by JRMichler
This car is begging for a gear ratio change to get that RPM below 2000. You will lose the "wonderful power", but won't need that power once you get good at DWL.
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The gear ratio on the transmission is the same as my wife's Grand Prix, but the difference is in the differential, according to the research I did. The one I probably have is a 4.1:1 and they made a few 3.7:1 differentials. The trick is finding one that is in good working condition. And having the money to pay for it as well.
Quote:
Originally Posted by JRMichler
As for ignition timing, look for a Haynes or Chilton repair manual. You can lose several MPG if the timing is off by only a few degrees.
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I used the instructions in the Chilton manual that resulted in such poor timing that I couldn't accelerate into traffic safely. I cannot seem to log in to the state library website to get back to the manual to double-check what I learned, so that'll have to wait for a day or two, but I seem to remember it saying to set the timing to ten degrees at ~600 RPM, and that was just obscene. The car barely ran.
Quote:
Originally Posted by JRMichler
Cam timing is not intended to be adjustable. It changes when timing chains wear.
Does it have a carburetor or fuel injection?
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The timing belt is only about 5 or 6 thousand miles old. It is fuel injected.
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Originally Posted by Cobb
Plan b, instead of lowering, add an air dam, lawn edge strip bottom of bumper.
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The bumper sits about a foot off the ground and I haven't quite figured out how to extend that downward enough to put a wind dam on short of building some kind of framework and manufacturing a new bumper. Any suggestions?