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Old 08-19-2010, 12:49 PM   #6 (permalink)
Meph
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Join Date: Apr 2008
Location: ontario
Posts: 84

240Z - '73 Datsun 240Z 240Z
90 day: 34.41 mpg (US)
Thanks: 15
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hey guys, the wind tunnel tests show a very small cd reduction from headlight buckets, somewhere int he .00x range so i think ill leave it for now, I checked my trip coutner vs googe maps and my trip counter reads 6.75 miles for a 7.5mile actual so an 11% under, using this conversion I was actually above 35MPG!!

I run an aftermarket ECU and wide band sensor, the wide band allows me to set a cross over point of its Narrow Band mimic output. So all i need to do to change the a/f is adjust 1 setting my fuel maps are all around 14.7-15 and the ECU will pull fuel when crusing to get the desired a/f.

Im considering swapping the 3.54 diff for a 3.03 LSD at some point, that will drop revs even lower, a lot of my cursing is at -18 to -20 In-hg, so a little more load and lower RPM maybe help out even more.
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