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Pro Charger with 11:1 compression?

This is a discussion on Pro Charger with 11:1 compression? within the Forced Induction forums, part of the LSx Technical Help Section category; I have an LT1 heads cam, totally forged bottom end splayed mains, making between 350 and 400HP. I saw an ...

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    Pro Charger with 11:1 compression?

    I have an LT1 heads cam, totally forged bottom end splayed mains, making between 350 and 400HP.

    I saw an ATI install on T.V. that took an LS1 car from 368HP to over 500HP.

    I'd like that.

    Since a stock LS1 motor has high compression like my LT1, can I assume I will be OK with my 11:1 LT1?

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    Member Tracker9118's Avatar
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    [QUOTE=Jason Polzer;1401123]I have an LT1 heads cam, totally forged bottom end splayed mains, making between 350 and 400HP.

    I saw an ATI install on T.V. that took an LS1 car from 368HP to over 500HP.

    I'd like that.

    Since a stock LS1 motor has high compression like my LT1, can I assume I will be OK with my 11:1 LT1?[/QUOTE
    With a stock bottom end you will be on borrowed time.
    Not saying you can't if your lt1 is like my ls1 you will see bout 497 hp on a stock ls1.
    Found out the hard way. I had over 100000 mi on it.

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    let the F-Bodies roll jimmybling31's Avatar
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    Quote Originally Posted by Jason Polzer View Post
    I have an LT1 heads cam, totally forged bottom end splayed mains, making between 350 and 400HP.

    I saw an ATI install on T.V. that took an LS1 car from 368HP to over 500HP.

    I'd like that.

    Since a stock LS1 motor has high compression like my LT1, can I assume I will be OK with my 11:1 LT1?
    with a fully forged bottom end I don't see why not. I'd upgrade to a copper head gasket and make sure you have really good head bolts though.

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    LTX N20LT4's Avatar
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    A Pro Charger on an 11:1 motor is, in short, a No No! If your going to go supercharged, i'd recommend lowering the compression or the motor is NOT going to last long. Nitrous would better suit your current setup.

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    Senior Member 440 rwhp trans am's Avatar
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    lol you would blow your motor up! no question. n2o will be just fine

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    +1 on the N2O idea

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    I originally built it for nitrous. It is a really stout 350 no expense spared.
    But now I'm thinking bottle fills will be a hassle. I haven't bought a nitrous kit yet. I just got thinking about other power adders after seeing an ATI install on Horsepower TV. It would be nice to have the power there all the time.

    <shrug>
    I figured if people with stock LT1's and LS1's are bolting these superchargers on I could do it on my built nitrous motor?<shrug>

    Maybe not - anyone tried?

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    Member ultra_badass's Avatar
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    with that high of compression something will give nos is alot better for that high on compression

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    LTX N20LT4's Avatar
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    Quote Originally Posted by Jason Polzer View Post
    I originally built it for nitrous. It is a really stout 350 no expense spared.
    But now I'm thinking bottle fills will be a hassle. I haven't bought a nitrous kit yet. I just got thinking about other power adders after seeing an ATI install on Horsepower TV. It would be nice to have the power there all the time.

    <shrug>
    I figured if people with stock LT1's and LS1's are bolting these superchargers on I could do it on my built nitrous motor?<shrug>

    Maybe not - anyone tried?
    You have to factor the 11:1 compression. You built the motor for: Nitrous! That's your only option right now if you wan't a successful combo. Stock compression for an LS1 is 10.1:1, and many people that go the blower route even with the stock comp don't get away with it for long. Your pushing 11:1. A supercharger is virtually out of the question!

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    Member ultra_badass's Avatar
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    with that high of compression something will give nos is alot better for that high on compression

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    let the F-Bodies roll jimmybling31's Avatar
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    I do agree with the people that have said go n2o. it will be better with high compression. a supercharger would require alot higher octane fuel.

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    Member ultra_badass's Avatar
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    prem is really ok with a FI setup..the only problem is the comp..if he would lower the comp to 7:1 or 8:1 then going FI would work and you can still put n2o on it

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    Member Tracker9118's Avatar
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    If you want more power go to www.TPIS.com get a hold of them tell them what you have & they will tell you what you need to get 500++ hp with out nos or a blower.

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    Thanks

    I was hoping to find support for a not-so-good idea but you guys are confirming what I already thought.

    Oh well I'll spray it until something breaks and decide what happens then.

    Jason

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    doesn'tplaywellwithothers superchargedblackgto's Avatar
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    Quote Originally Posted by ultra_badass View Post
    prem is really ok with a FI setup..the only problem is the comp..if he would lower the comp to 7:1 or 8:1 then going FI would work and you can still put n2o on it
    9:1 is ALL I would go if it is for street, those are really too low 7:1-8:1
    Brad

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    you can use a supercharger with a tune but really probably wouldnt see enough gain without using race gas
    sounds like your lt1 should make more than 350-400hp if you went through the trouble of getting splayed main caps

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    Quote Originally Posted by Jason Polzer View Post
    I originally built it for nitrous. It is a really stout 350 no expense spared.
    But now I'm thinking bottle fills will be a hassle. I haven't bought a nitrous kit yet. I just got thinking about other power adders after seeing an ATI install on Horsepower TV. It would be nice to have the power there all the time.

    <shrug>
    I figured if people with stock LT1's and LS1's are bolting these superchargers on I could do it on my built nitrous motor?<shrug>

    Maybe not - anyone tried?
    ok I will. DO IT 11.4:1 procharged at 10#'s

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