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  1. #1
    TheCyborgSlayer's Avatar
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    Doís/Doníts/Guidance (Turboing an HO)

    So Iím considering a winter project of turbocharging my GP HO. As the title suggests, how do I go about doing this and keep some semblance of reliability? My goal is to get above 80mph, but I donít want to run high rpms that will require me to upgrade the valve train, engine internals, etc. Basically, Iíd like to avoid going into the engine initially. That time will come, but Iíd prefer it be down the line.

    So where do I start? What do I need to avoid? How much boost would be considered ďsafeĒ on an HO? What type/size turbo should I go with? Any suggestions or guidance that anyone with experience boosting an HO is welcome.

    Thanks


  2. #2
    TheCyborgSlayer's Avatar
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    No one?

  3. #3

    Doís/Doníts/Guidance (Turboing an HO)

    Well itís a higher CR motor then the SVHO so youíll have to run E85 or some other kinda gas, pump will be out of the questionÖ.

    You still plan on doing it I like the borg Warner 6758 for ease of plumbing.

    If you donít plan on going in the engine and doing springs/retainers at a minimum I wouldnít even bother. Also youíd probably have to go Riva/maptuner and datalog it to get a proper tune. I know Jesus has some for the n/a motor turned turbo (Iíve started with it) but itís just a real basic map to get you going and requires loggingÖ.

  4. #4
    TheCyborgSlayer's Avatar
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    I already have a maptuner. I know with the higher compression ration I’m looking at lower overall boost pressure, so I would be looking for a turbo that spools quickly as opposed to one that makes a ton of boost.

    Running the lower boost and lower rpm’s, 93 octane should be fine.

    The springs/retainers will be done at some point. But not initially, especially given the price of the installation tool. It’s steep for something I’m only going to use once or twice.

    I just want to keep this simple and straight forward for the time being.

  5. #5
    Quote Originally Posted by TheCyborgSlayer View Post
    I already have a maptuner. I know with the higher compression ration I’m looking at lower overall boost pressure, so I would be looking for a turbo that spools quickly as opposed to one that makes a ton of boost.

    Running the lower boost and lower rpm’s, 93 octane should be fine.

    The springs/retainers will be done at some point. But not initially, especially given the price of the installation tool. It’s steep for something I’m only going to use once or twice.

    I just want to keep this simple and straight forward for the time being.
    6758 is the right candidate

  6. #6
    How much boost you plan on running then 2psi? Itís got 190psi of compression if I remember right and itís already tuned for 91octane (sure thereís SOME left) but youíre going to run out of fuel/injector quick AND you donít want to do retainers at first? Donít do it until youíre ready to spend the money and do it right or cut corners and hope you get luckyÖ..

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  8. #7
    mittens's Avatar
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    You can do retainers with out the riva tool.

    Hell head gasket & bolts cheaper then the tool. Haha

  9. #8
    TheCyborgSlayer's Avatar
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    Quote Originally Posted by mittens View Post
    You can do retainers with out the riva tool.

    Hell head gasket & bolts cheaper then the tool. Haha
    Any recommendation on what spring compressor will work?

  10. #9
    Quote Originally Posted by TheCyborgSlayer View Post
    Any recommendation on what spring compressor will work?
    Look at ebay, They have some cheap ones. I got one and have used it many times. I can only use this one if the head is removed.

  11. #10
    TheCyborgSlayer's Avatar
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    I was glancing earlier. I see a few made for overhead valves that look like they would work with the head on. If I have to break the head loose I’m going to be pulling a lot more while I’m in there. Lol

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