5.7 Vortec Upgrade Options

Discussion in 'Engine Performance + Maintenance' started by Trenton, Aug 12, 2019.

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  1. Supercharged111

    Supercharged111 I'm Awesome

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    So it wasn't you that said this?

    If I didn't know any better, I'd say you were trolling this thread.
     
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  2. Schurkey

    Schurkey I'm Awesome

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    Well, sort of. In reality it's lots more complex than that. "Steel" and "Cast iron" come in a huge number of varieties, with a bunch of different alloy ingredients--copper, molybdenum, vanadium, chromium, etc.. Looking just at the carbon content:

    Iron plus LESS THAN ~2% Carbon = steel. Steel is a low-carbon alloy. Stainless steel may have so little carbon that it can't be hardened by heat-treatment.

    Iron plus MORE THAN ~2% carbon = cast iron. Cast iron is a high-carbon alloy. When you see cheap-junk Chinese crankshafts advertised as "Cast Steel", what they mean is "Cast Iron" because there's way too much carbon in the iron to be genuine steel. They're lying to the consumer.

    HOW was that octane measured?

    Currently, in the USA and Canada, octane is averaged between Motor Octane and Research Octane rating methods, to create "Pump octane" or "Anti-Knock Index" rating.

    R + M / 2 = the octane number you see on the gas pumps in USA.

    Europe and Australia don't average the two methods. They use the Research Octane method, and that's what's posted on the pumps. It's typically about 4-5 numbers higher than the equivalent AKI rating.

    So what method did the USA use in 1970?
     
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  3. Trigger_guard

    Trigger_guard I'm Awesome

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    Last time I checked ,heads go on the top of the engine, but what do I know. I'm just a dumbass

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  4. Trigger_guard

    Trigger_guard I'm Awesome

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    Listen man. You've tried really hard. But this post has zero relivance towards anything.
    Doesn't matter how much carbon is them. They're still not aluminum
    And I don't care if they got the numbers from a magic 8-ball. If you think your engine will run with 11/1 c/r, then do it. By all means I beg u

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  5. Supercharged111

    Supercharged111 I'm Awesome

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    Well if you hurt the long block, you've hurt the short block, so I fail to see your point. Keep digging.
     
  6. Trigger_guard

    Trigger_guard I'm Awesome

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    Ok. So I'ma try and explain this as simple as possible.

    Vortec heads are iron
    Iron heads run hot

    Positive intake pressure(boost) = high effective compression

    L31 vortecs have a high static compression

    High static compression + high effective compression + hot heads = detonation

    Detonation = wrecked bottom end

    Doesn't matter if it's stock, forged, or a fucking top fuel dragster, the integrity of your short block is irrelevant.

    Detonation will kill it




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  7. Trigger_guard

    Trigger_guard I'm Awesome

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    You know,. We could have had an intelligent conversation. Y'all could have proved me wrong. I did my research. And I know how Whipple ran boost safely. But none of y'all could tell me. Instead you backed me it a corner and threw hammers at me. "You're a dumbass" and "my truck did this or that" isn't a discussion, it's a dick measuring contest.

    So congratulations y'all got bigger dicks.
    I'm out. Enjoy your circle jerk


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  8. RDF1

    RDF1 I'm Awesome

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    Dang.
    And I couldn't remember if vortec heads were alum or not.

    I've never boosted anything but LS engines.
    But use to tune my buddy's 98 5.7 vortec on nitrous never had a issue with it up to a 225 shot.

    Sent from my HiDiNg PlAcE
     
  9. Trenton

    Trenton Just a Texan transplanted in the Rockies

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    Hey y'all calm down this thread was about making more power with bolt ons, I wasn't looking for this honestly-laughable debate lol.
    I'm still on the rocks due to the fact I will still need to update my fuel injectors to the MPFI, I'll need a 255 lph fuel pump, headers, regap my spark plugs, of course a cam, and hook that supercharger air filter into my current air box. But having 6 psi of boost with a shift kit would be a badass upgrade.
     
    Last edited: Aug 15, 2019
  10. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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    You know what they say - Go big or go home!
     
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