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Modifying a 3400 for MPG

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  • #16
    Originally posted by robert 1980 View Post
    So i guess i know why you sold me your old cam then??
    I had two projects going for the longest time, one was going to be a performance build and the other an MPG build. I sold the car that was going to be the MPG mule and was going to stick with the performance build. Then I was having issues with my daily driver (dodge neon) and pretty much sold everything off to fund a new vehicle with the plan to put the grand am that is torn down in the garage back together with a stock 3500. With the way the used car market is I fixed my daily driver and I found the TOG headers for $350 and got the MPG Cam from Ben. Not enough time or money to do everything I want to, so I figure I might as well stick with the cheaper route and get a little more performance with a little better fuel economy.

    If that was your guess then you are correct
    Last edited by onefastV6; 07-15-2011, 01:01 AM.
    2000 Grand Am GT
    2011 Chevy Impala

    "The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power." ~John Lingenfelter

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    • #17
      10-12 city and 30-35 highway with my 3500 in the old Z24 (5 speed, 3.61 FDR)... highway spark was a little past 40 degrees, LCM was enabled but the AFR's hovered in the low 16's during it's on-time. If i had a little less cam the city MPG would be much better.
      Past Builds;
      1991 Z24, 3500/5 Spd. 275WHP/259WTQ 13.07@108 MPH
      1989 Camaro RS, ITB-3500/700R4. 263WHP/263WTQ 13.52@99.2 MPH
      Current Project;
      1972 Nova 12.73@105.7 MPH

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