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Old 01-10-2007, 08:20 PM   #1
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getting better mileage out of a 450hp car :)

Well a 25 cent part is broke in my metro trans. Going to have to take it out and split the case to get at it though Meanwhile I get to drive my drag car to work. 2002 Camaro Z28, ls6 block, GM ASA racing cam, 3000 stall converter, wide open exhaust, and lots of other stuff that doesn't do much other than run real good 1/4 mile at a time.

So the car stock would run a 13.08 1/4 mile and get 25 city 31 highway. Currently it can run anywhere from 11.6 to 12.3 depending on traction and I typically get just under 10mpg driving to the track racing all day and driving home. I drove it to work today trying to be easy on it and managed 14mpg. But it is a lot different than a metro doing a lot of stuff. It does not require any extra throttle to hold speed going up any hill is the first thing. Taking all curves at full speed with no braking is another helpful advantage. Before I left for work today I reset the L-trim tables and set the torque converter lockup to 45mph, 35mph in 3rd gear. I also am thinking of setting the target voltage on the O2 sensor to .3 or so to lean it out a bit but I am not sure if the 110 degree lobe separation cam even lets the O2 sensor properly work. The cam has a big overlap and lets plenty of intake air out the exhaust. It is impossible to stand near the back of the car with it idling due to the fumes. 226/236 int/exh @ 0.05" duration 0.525" / 0.525" int/exh lift 110 LSA are the cam specs. Also I wonder how much extra drag I get from driving with drag radials on the road.

So anyone got any ideas for experiments I can try on my 100 mile round trip to work the rest of this week? I am not thinking there is much to be tested but it could be interesting seeing what I can try in it.
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