Discussion in 'High Tech for Old Iron' started by real82it, Nov 2, 2015.
Great update! I had the exact same reaction on my first drive with the Fitech, "whoa!"
I love this thread With all the messages I may have missed your update on fuel mileage. Any improvements over carb? What mpg are you getting?
I improved 2 mpg in city (from 7 to 9 mpg) and 3 mpg on highway (from 11 to 14 mpg). The highway mpg improvement is what surprised me. My prev Q Jet was tuned to the engine. Cruise AF had measured fine around 14:7:1. But, I am not complaining! Nice to spend a little less on gas!
What are the specs on your wheels/tires?
I told Denny Manner with my overdrive and FI I should get better gas millage. He was very kind and did not laugh at me. At 70 mph I see about 21 to 22 lph. That works out to 11 mpg.
Best MPG I ever saw with Q-Jet or Holley or FAST EZ-EFI 1.0 (and TH400) was 11-12 MPG going to/from Somerset KY cruise in. That trip is right at 200 miles each way with about 175 of that being 70+mph highway. With the FiTech and TH2004R and locking converter I saw a solid 15 each way last year. I don't see it ever being any better than 15 MPG....
I keep thinking on the new motor that maybe I want a cam that would give just a little bit of millage. But then how would I get 800 HP?
Trade some duration @ .050" for more lift and stuff in more boost.
More boost is always the answer.