Blown, alky motor
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Blown, alky motor

  1. #1
    Senior Member Bigblockbill's Avatar
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    Default Blown, alky motor

    Ok I am new to this forced induction thing, but just picked up a new motor. Its a 400 block with supposedly 12:1 pistons and a 6-71 blower at 1:1 on alcohol.

    12:1 compression sounds like a ton for a blower, but I don't know anything about the alcohol. Is this thing a recipe for disaster in a 1/4 mile dragster?
    24' Eliminator Fundeck

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  3. #2
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    No problem with 12 to 1 blown alcohol. I have pushed 12.5 and have run boost pressures of 25 lbs without a problem....many years.

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    Senior Member Morg's Avatar
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    Sounds absolutely perfect.

    A fair amount of compression & a little blower.

    This is pretty close to my deal. I am 4% over with a 671 & right around 12:1.

    The blower puts out 8 lbs of boost at what I think is around 7K rpm.

    There is allot of knowledge in hear regarding blown injected alcohol. Just ask specific questions & you will get the help you need.

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    Senior Member Bigblockbill's Avatar
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    Glad to hear that it is not too much compression. Thanks guys. I am sure I will be having lots of questions.

    I know the first thing I am going to want to do is try and slow this thing down some until I can learn to drive it. Don't know if I can slow it down to the 10 sec mark or not but it would sure be nice. Where is the best place to buy pulleys? How much can I underdrive it and have it not be a pig?
    24' Eliminator Fundeck

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    Senior Member Morg's Avatar
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    You can find pulleys on e-bay.

    I have a 8mm 60 I will let go if you need.

    Fiat48 (Bob) can let you know about under-driving.

    What are you putting this deal in?

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    They slow down just fine. Give me more of an idea of the motor and the car..it's weight, etc.

    Usually some pulleys on Ebay...or RCD sells them as do most blower shops.

    Many guys build a motor depending on the blower a lot to make the power. Other guys build a rather efficient N/A motor and then supplement the motor with the blower. Just depends on what you have...how it was built.

  9. #7
    Senior Member Bigblockbill's Avatar
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    http://cgi.ebay.com/ebaymotors/ws/eB...m=200237790824

    Here is the ebay link to the car. I had not planned on buying this much car, but the price was right so I could not turn it down. Now I have blown the budget and still need to buy an enclosed trailer and quad. But it will be fun at least.
    24' Eliminator Fundeck

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    Nice buy, seams like a lot of bang for the buck

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    Senior Member Morg's Avatar
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    Bill,

    If you stay with the 1/2 pulley's I have a 34 & a 38 i would like to get rid of.

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    Quote Originally Posted by Bigblockbill View Post
    Glad to hear that it is not too much compression. Thanks guys. I am sure I will be having lots of questions.

    I know the first thing I am going to want to do is try and slow this thing down some until I can learn to drive it. Don't know if I can slow it down to the 10 sec mark or not but it would sure be nice. Where is the best place to buy pulleys? How much can I underdrive it and have it not be a pig?


    Talk to these guys..They have new & used pulley's... Oh.. And turn your volume up before you go there...

    http://www.rbssuperchargers.com/

  13. #11
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    I would put it about 6% underdrive....lean it 10 numbers...a new set of NGK 8 range plugs.
    Run a couple half track passes.....see whatcha got.
    Looks like a good time!

    If you are going to run an index with this thing.....I would go to 8mm pulleys so you can close tune the number with the blower. On 8mm...1 tooth is approx 2% drive change so it allows for fine tuning.
    Last edited by Fiat48; 07-27-2008 at 05:48 PM.

  14. #12
    Senior Member Bigblockbill's Avatar
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    Good inputs thanks. Just going to be doing bracket racing for now. I don't think we have an index class available here.

    I can not wait to get it here now and play with it.
    24' Eliminator Fundeck

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