Have you ever looked under a metro back end and seen how low the bumper is compared to everything else under the back? I would probably have to cut 6 inches off the bottom to get it level with the rest of the underside.
Besides it proved itself in this situation with coastdown testing. I have a 4% grade that is 2 miles long that I use for all my coastdown testing.
The front bumper really makes the car drive different. With all the air going over the top of the car it feels like I have sway bars. It keeps the front end planted solid to the ground, so a sharp curve I can normally take at 35 with a bit of tire squeal I took at 40 with no squeal today. I kind of like the way it makes the front end seem much more stable than a Metro ever did at 70mph. I think the bumper is helping the car though I had a really hard time holding 55 and was constantly drifting up to 60-65mph today. The car just felt like a different car. I normally get 60mpg on the trip I did today of about 40 miles. Today I got 66mpg. One day doesn't mean much but from the feel of the way the car coasts it has to be an improvement. I will need to cut a small vent into it since the fan was cycling while I was driving.
On that chart it shows a bit of air going under the car is ok. If I bent the bottom inch or two under to get more of a point does anyone think that would be better than the way it is now? I could probably just build a small lip under the radiator to push the underside air through the radiator and save from cutting a vent hole in the bumper If I did.
Here is a preview of tomorrow's post if I get time to get it done
