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Thread: Tuning for towing?

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  1. #1
    RIP EagleMark's Avatar
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    If all you did was get the VE in line with BLM numbers it will be fine! Now if you did something drastic with spark and no knock you may have something to worry about.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
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  2. #2
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    Quote Originally Posted by EagleMark View Post
    If all you did was get the VE in line with BLM numbers it will be fine! Now if you did something drastic with spark and no knock you may have something to worry about.
    Actually didn't even touch spark, other than one spot where there was a "sag" in the factory timing map. I have a feeling with some time there is some efficiency to be gained there, but without a knock sensor I don't feel comfortable making changes on a vehicle I don't have time to adequately test.
    "Frankentruck" is a "1985" K5, TPI 350 '165/6E (Vortec Heads, SDPC2000 base, roller cam, headers), 32 Spline SM465, 205 w/VSS, 10b/14SF, 3.42's and 33" tires. Soon to be boxed frame, '87 sheetmetal, and TPI w/ '727

  3. #3
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    well.... you could invest in something like the G3 adapter(and the EX switch) from Moates.... then if he experiences any pinging, he can switch to a different tune on the fly with one that has less advance to combat the detonation.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  4. #4
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    True, but I'd just prefer to have the tune be an "all in one deal". He's not the type of guy to want to deal with that sort of stuff if he doesn't have to.

    If the timing is conservative enough as is, I don't think he'll have any issues. It must not be a huge issue, I didn't see any posts where people had said "when I tow my truck runs like garbage" in relation to the tune.

    He's already got an adapter/ZIF, so on his past "trips" I've just given him a spare chip with a stock bin on it in case the bin I burned has a problem we didn't notice.
    "Frankentruck" is a "1985" K5, TPI 350 '165/6E (Vortec Heads, SDPC2000 base, roller cam, headers), 32 Spline SM465, 205 w/VSS, 10b/14SF, 3.42's and 33" tires. Soon to be boxed frame, '87 sheetmetal, and TPI w/ '727

  5. #5
    RIP EagleMark's Avatar
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    If you didn't do anything drastic to spark he'll be fine. I'm sure you have distrbutor and initial timing set correctly? You could post the bin for a look but really think he's fine. Can he hear ping? If his hearing is good and he here's ping then fill up with higher octane till he gets home.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  6. #6
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    Where was it that I saw a cheap and small recorder to connect to the ALDL? Maybe it was so long ago that they don't make it any more. But it would work. Send Dad out for a drive with trailer and check the recording when he gets back.

  7. #7
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    Huh. Never heard of such a thing. Interesting idea, certainly simple. I've got an autoxray but pretty hard to drive and look at that thing. :)
    "Frankentruck" is a "1985" K5, TPI 350 '165/6E (Vortec Heads, SDPC2000 base, roller cam, headers), 32 Spline SM465, 205 w/VSS, 10b/14SF, 3.42's and 33" tires. Soon to be boxed frame, '87 sheetmetal, and TPI w/ '727

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