Re: MPG up 50% so far

[Chuck]

Bill- Are you going to run the 5.7 with the Hydra?  THAT would be cool! -Chuck ------------------------ Bill Cardell wrote: Elvis has done as high as 36 on the highway with fmii hydra at steady 75-80. Will be interesting to see what 5.7 litres will do geared to run 1600 or so at 80. Bill Cardell TurboDog's Dad www.flyinmiata.com www.fmwestfield.com orders 1-800-FLY-MX5S tech support 970-464-5600 Don't miss Flyin' Miata's Open House! Aug 14-17, 2008 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Brad Franks Sent: Friday, June 13, 2008 8:53 PM To: Robert McElwee Cc: miatapower List Subject: Re: MPG up 50% so far I don't want to burst your bubble, but I would still hold on to that 35 mpg target. In my NA 1990 1.6L Miata with the stock ECU (and CAI w/ K&N and 4-2-1 header) I generally average 30 mpg without trying and can get 32 if I work at it. I ride on Falken 185/60/14 ZE-915's @ 26-ish PSI (I think it's like 27 front and 25 rear). I have an Autometer LED based AFR gauge and an oem-ish heated Bosch O2 sensor (from FM). I use that as my "economy" gauge - when it's dithering I'm good, if it goes solid 15.5+ I back off the throttle and get it dithering again. I don't hypermile though - I coast with the engine on rather than off. Any time I can be in high vacuum I will generally be in neutral instead. I also have an Autometer electric fuel pressure gauge in the dash - I watch that and try to keep my fuel pressure as low as possible. I suppose this is the same as the vacuum gauge as the fuel pressure is a function of vacuum on the fuel pressure regulator. Of course all of my high mileage means nothing when you add in the cost of a quart of oil every 80 miles or so. With your tunable ECU I could see you creeping up on 35, possibly into 36 but I have my reservations about 40 mpg. If you make it there I will GLADY eat my shoe and be on the phone to FM for a new ECU. Brad Robert McElwee wrote: I checked my mileage today and it is up 50% since I started the project (30.5 MPG vs 20.0 MPG). I'm pretty psyched about it because I have not really spent much time working on the car. It would seem that I could possibly get to 40 MPG now instead of the 35 that I had for a goal. So far the only mods I have done are removing the SC (intake is just a PVC coming 90 degrees out of the manifold with an FM purchased K&N filter), pumping the tires up to 50 PSI, and dropping the Master Fuel from 100 to 90 (RC 440s). Of course, I have changed my driving habits quite a bit. _______________________________________________ Miatapower mailing list Miatapower@miatapower.net http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower _______________________________________________ Miatapower mailing list Miatapower@miatapower.net http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower

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