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Frankentrucks first MPG results

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dyeager535, Mar 8, 2001.

  1. dyeager535

    dyeager535 1 ton status Premium Member

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    Well, not as high as I would have hoped, but I managed 12.5 combined city/freeway with my K5. Old 350/Quadrajet/ factory true duals/Sm465/205/3.42's/33x10.5R15

    I'm gonna lean the primaries up a bit probably, since either I'm all the way into the gas, or just barely. I think I'll probably get 15 freeway as it is now, a little fine tuning (don't even know what motor/year the distributor is) and I think I will be into the 17's. The Vortec heads, roller cam, roller rockers, Performer intake, should be up to 20 I hope!

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  2. mudfanatic

    mudfanatic 1/2 ton status

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    I'd think that 15 out of a 350 is wonderful and 17 would be great but 20?
    I just discovered that in a couple of years if you have around 12,000 saved up you should be able to get around 40 out of a Blazer. It is this new 48volt system and an engine that goes along with it that has no distributor, no camshaft, no timing chain, and electric valves. the computer precisely opens the valves when the crank is in the right position and the loss of weight and friction combined with an updated injection system is claiming 40 MPG out of a large cadilac with enough power to burn the tires [​IMG]
    Dan

    <font color=red>get involved with land issues or lose the land</font color=red>
     
  3. Blue85

    Blue85 Troll Premium Member

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    You are referring to true variable displacement technology. It's like having an RV cam off-idle, a Race-car cam with solid lifter at high RPM, a 4-cylinder on the highway and a big V-8 off the line. However, I don't think that anyone is planning on producing one for at least a few years and you can't sell prototype engines for any price due to liability reasons, so for now, we'll all just have to dream...
    What I want to know is how much does a custom-burnt chip cost so that I can add a supercharger?

    <font color=blue>"Guys aren't able to get $15-20million a year anymore, so you have to play for the love of the game." --Penny Hardaway (Orlando Magic)</font color=blue>
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    You really need a chip burned? I can ask the GM car list who does those...truck chips are just as primitive as the cars that vintage I assume : )

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    17-20 should be no problem. (I hope!) You figure raising the compression "adds" power without costing me more money at the pump (right at 9.5:1, so 87 octane will work) the roller lifters/cam will put me at around 50 more "free" hp (small cam grind for low end grunt/economy) so I think with the added HP, that is not costing anything in terms of more fuel, etc., I should be able to eek out a few more MPG...all this was calculated on Desktop Dyno 2000, which was just shown to be almost as accurate as a real dyno. (almost being the key word)

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  6. Blue85

    Blue85 Troll Premium Member

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    I was talking about a chip for a variable displacement, full electric valve engine

    <font color=green>Stupid tourist at Mammoth Cave, Kentucky: "How many miles of unexplored passages are there?"</font color=green>
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    In that case, I can be of absolutely no help :)



    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  8. Executioner

    Executioner 1/2 ton status

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    Is that progarm any good from say 1000-3000 rpm's ?
    Do you have a way to test the program vs. the real world ?
    How many dyno pull/runs have you compared ?
     

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