need advice
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This is a discussion on need advice within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I'm getting ready to upgrade my turbo to a atp gtx 3071. I've already ordered it, and have that, fuel ...

  1. #1
    Registered User shadowpr's Avatar
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    need advice

    I'm getting ready to upgrade my turbo to a atp gtx 3071. I've already ordered it, and have that, fuel upgrades, and new headers waiting to be installed.

    after some talk yesterday in the chat, it was recommended that i wait to do the upgrade until after i upgrade my engine.

    What is the chance that the stock engine will blow on this turbo if i run low boost? will usually be on e85 as well.

    Thanks.

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    The Fruit mangostick's Avatar
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    what do you consider "low" boost?

    As long as you have the supporting mods in the fuel system I dont see where it would be any different. Now, you know with this beast of a turbo "low" boost will be less than the stage levels you are accustomed to with the factory turbo. Flow is the reason.. even at lower levels you're still going to be shoving a lot more air into the car. You'll also be matching that with fuel and more of both of those makes more bang. More bang=more power. I say run it till it pops but that might not be a great Idea if what pops damages the other components you want to keep.

    wouldn't hurt to build the bottom before loading the top.. but if you're conservative with boost/timing you should be fine for now.
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    Re: need advice

    Well Shawn then what's the benefit for Will installing the larger turbo if the only outcome is Lag? My recommendation is to build the bottom end or trade the turbo for something a little more mild.

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    Registered User shadowpr's Avatar
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    well i probably wont have the money for a built short block for at least a year.

    going to be sad sitting on all these parts.

    guess i'll just buy the girl a ring instead..... i hope my car understands.

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    UnBanned Sinister's Avatar
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    So.... I have kind of a different opinion....

    keep the turbo. It's similar to mine, and a righteous beast. Use pump fuel instead of E85. 2 things kill engines... power, and detonation. Get a safe daily driver tune on pump fuel with that turbo, and you'll still be able to hit 310-350whp at 18-19psi. Then you have a fun driver with more power... but you're not in the 370-450 range which would be wayyy too much power. It's still a lot of power for the stock engine, but you'll be a lot safer than the E85 tune as long as there is not knock.
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    Luke Skywalker Mikie13's Avatar
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    Get a Mustang. They come with 415hp already.
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    Registered User shadowpr's Avatar
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    Interesting.

    Keep the opinions coming.

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    Luke Skywalker Mikie13's Avatar
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    I was only kidding about the Mushtang.

    Put a block on a credit card? Take out a small personal loan to cover the block if you're financially able to pay it down?
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    Registered User shadowpr's Avatar
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    I just put the turbo on credit card. Plus I need to find a ring for the girl.

    Add that to the fact that I'm not working, and I just can't let myself get that far into debt. After the parts, install, tune and ring I'll be about $10k in the hole.

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    Subaru Newb MainFrame's Avatar
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    You could install the turbo and tune it to 16-17psi on 93 octane with really conservative timing.. I don't see why that would do any more damage to the engine than a smaller turbo (16g) tuned to the max. You'll have the lag without the power, but you could keep the turbo in high efficiency with a really flat torque curve and a uber conservative tune. It should be fine.

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    Registered User 11wrx's Avatar
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    Quote Originally Posted by shadowpr View Post
    I just put the turbo on credit card. Plus I need to find a ring for the girl.

    Add that to the fact that I'm not working, and I just can't let myself get that far into debt. After the parts, install, tune and ring I'll be about $10k in the hole.
    Maybe I am missing something, but I don't see the logic here...

    Back to the main topic...While you surely could run a conservative tune on the car, do you really want to put miles on the equipment while not really getting the benefits of it? Granted you wouldn't be running it to its full capability, but you are still putting miles on it. Might be something to toss into the mix of pros/cons.

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    Luke Skywalker Mikie13's Avatar
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    Quote Originally Posted by 11wrx View Post
    Maybe I am missing something, but I don't see the logic here...
    Because racecar braaaaaaah!

    We all love the mod-bug...I took out a small loan from my parents for my coilovers and other replacement goodies to actually make my old worn out car, into a fun daily driver again. The struts are seized, so it needed to get done and I don't have time to be down with a rebuild, so may as well get the next best performance thing...so I'll be paying them back over the next year or so.
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    Registered User shadowpr's Avatar
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    ok, i found the built short block that i want. not sure when i'm going to get it, but i have a question.

    what else is needed when installing a new short block?

    timing belt kit, water pump, oil pump (which one and size?), spark plugs, head gaskets, what else?

  16. #15
    Registered User 11wrx's Avatar
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    Quote Originally Posted by Mikie13 View Post
    Because racecar braaaaaaah!

    We all love the mod-bug...I took out a small loan from my parents for my coilovers and other replacement goodies to actually make my old worn out car, into a fun daily driver again. The struts are seized, so it needed to get done and I don't have time to be down with a rebuild, so may as well get the next best performance thing...so I'll be paying them back over the next year or so.
    I don't see anything wrong with that particular situation. My point was more related to the intention to build $10k in debt with NO job. I have seen people attempt this with horrible outcomes. To each their own I suppose.

    GL with the build though...should be awesome once complete.

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