GAS vs ALKY Carbs.
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GAS vs ALKY Carbs.

  1. #1
    Senior Member blown86hallet's Avatar
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    Default GAS vs ALKY Carbs.

    Gents.

    Been reading some of the post's about the blower engine's Gas vs Alky. Very interesting stuff.

    My guestion,

    Building a 600BBF 12-71. 1050 Dommies - Gas.
    After reading how much better or "easier" on an engine, Alky is?
    Can I still use carbs? Change them to Alky?
    Or do I need a hat? What about fuel lines? anything special needed?

    Now you all have me thinking! Questioning my build!

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  3. #2
    Senior Member sturat's Avatar
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    Quote Originally Posted by blown86hallet View Post
    Gents.

    Been reading some of the post's about the blower engine's Gas vs Alky. Very interesting stuff.

    My guestion,

    Building a 600BBF 12-71. 1050 Dommies - Gas.
    After reading how much better or "easier" on an engine, Alky is?
    Can I still use carbs? Change them to Alky?
    Or do I need a hat? What about fuel lines? anything special needed?

    Now you all have me thinking! Questioning my build!
    Can not help with your question...
    But that is awesome that you are buliding a 600 BBF just make it blown and injected and have a great time. I wanted to build another ford but the HYdro came with all BBC stuff and just could not see spending the 2-3K to replace it with BBF stuff. I run a 514 BBF in my sanger jet and love it
    Legalize the Constitution!

  4. #3
    Senior Member blown86hallet's Avatar
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    Quote Originally Posted by sturat View Post
    Can not help with your question...
    But that is awesome that you are buliding a 600 BBF just make it blown and injected and have a great time. I wanted to build another ford but the HYdro came with all BBC stuff and just could not see spending the 2-3K to replace it with BBF stuff. I run a 514 BBF in my sanger jet and love it
    When I orginally purchased my Hallett 19' 6" it also had a 496 blown BBC. Well guess what? yep.

    As Soon as this ground up restore is complete, ton of pictures will be posted.

    I think I answered my question. I'll stick with Gas (AV), this will be a lake boat hard to find ALKY at a lake. I will bring fuel with me, but being my boat is an X-ski race boat (Twin 35 gallon tanks) I should be fine for a weekend. Besides, always ran Gas (AV) never had a problem, even is all the Superstocks we ran... I'll be running a Blower shop inter-cooler.

    good day

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    Senior Member tigertooth's Avatar
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    Also wondering about alky carbs on a roots blown lake boat moter. Built several over 1000h.p. gas motors over the years with great success. Got a customer wanting to build a blown alky deal but being a lake boat not much interested in the hat deal. Other option would be electronic injection but also something I know nothing about.

  7. #5
    Senior Member alkyexpress's Avatar
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    Quote Originally Posted by blown86hallet View Post
    When I orginally purchased my Hallett 19' 6" it also had a 496 blown BBC. Well guess what? yep.

    As Soon as this ground up restore is complete, ton of pictures will be posted.

    I think I answered my question. I'll stick with Gas (AV), this will be a lake boat hard to find ALKY at a lake. I will bring fuel with me, but being my boat is an X-ski race boat (Twin 35 gallon tanks) I should be fine for a weekend. Besides, always ran Gas (AV) never had a problem, even is all the Superstocks we ran... I'll be running a Blower shop inter-cooler.

    good day
    Just wondering do they have AV-gas at the lake you go to ???......Eric

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    Senior Member alkyexpress's Avatar
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    Quote Originally Posted by tigertooth View Post
    Also wondering about alky carbs on a roots blown lake boat moter. Built several over 1000h.p. gas motors over the years with great success. Got a customer wanting to build a blown alky deal but being a lake boat not much interested in the hat deal. Other option would be electronic injection but also something I know nothing about.
    They do make a blo-thru carb for turbo's on alky , but have not seen any alky carb's on top of a blower,,normally since the amount of fuel (about 1.7 x ) carb's just dont seem to be the answer to me ,, when you use fuel injection you get a better FAN of fuel , ( both with gas and alky , )....Eric

  9. #7
    GTO's and Jets Punisher's Avatar
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    Guys I have been talking to on other sights are going to E85 on their roots blown engines and loving it. Cheap fuel once the carb and delivery upgrades are in place.

    www.raceone85.com

  10. #8
    Senior Member tigertooth's Avatar
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    Thanks for the info guys. Punisher, are these guys converting blown gas engines to e-85. I am trying to build a dedicated alky motor, as in more compression, bigger cylinder heads and hopefully more h.p... hopefully with some reliability.

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    Senior Member alkyexpress's Avatar
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    Quote Originally Posted by tigertooth View Post
    Thanks for the info guys. Punisher, are these guys converting blown gas engines to e-85. I am trying to build a dedicated alky motor, as in more compression, bigger cylinder heads and hopefully more h.p... hopefully with some reliability.
    You can drive around with a ALKY injection system,( is it ideal maybe not ) what application boat are you trying to put the alky in ?.........E

  12. #10
    GTO's and Jets Punisher's Avatar
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    Quote Originally Posted by tigertooth View Post
    Thanks for the info guys. Punisher, are these guys converting blown gas engines to e-85. I am trying to build a dedicated alky motor, as in more compression, bigger cylinder heads and hopefully more h.p... hopefully with some reliability.
    1 guy I know personally is running 11.5:1 compression and overdriving 30% with an 8-71 on E-85 and cometic MLS head gaskets.

    The naturally aspirated guys are running up to 15:1 with it.

  13. #11
    Senior Member tigertooth's Avatar
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    Alky Express, 19 ft pickle fork jet boat. New build from the ground up. Looking for in excess of 1200 h.p. I have a 509 dart,Callies, Oliver steel rods, Brodix heads. Littlefield 10-71 and 2 dominators that made just over 1000h.p. on c-12 with about 10 lbs of boost This has proved to be a reliable combination for this customer but looking to step it up a bit and still be user friendly. Still trying to be a lake boat that doesnt have to come back to see me every week.

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    Senior Member alkyexpress's Avatar
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    Quote Originally Posted by tigertooth View Post
    Alky Express, 19 ft pickle fork jet boat. New build from the ground up. Looking for in excess of 1200 h.p. I have a 509 dart,Callies, Oliver steel rods, Brodix heads. Littlefield 10-71 and 2 dominators that made just over 1000h.p. on c-12 with about 10 lbs of boost This has proved to be a reliable combination for this customer but looking to step it up a bit and still be user friendly. Still trying to be a lake boat that doesnt have to come back to see me every week.
    DITCH THE DOMI'S,, lol , Just put a hat on it, (better throttle responce )...Eric

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