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  1. #1
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    question for the turbo guru's

    i was wondering if someone would be kind and help me, if you dont want to post it for others to see i understand. i dont want to step on anyones toes but i am not down for spending 4500 on a turbo kit when i know i can put one one in myself with some help on spec's.

    1. what size turbo is good for 300 horsepower @ 15 to 18 pounds of boost
    2. do i need to change pistons to lower the compression
    3. can i use a r d fuel controler to work like a ems.
    4. what size injecters for size of boost.
    5.i will hook up a o2 senser to a a/f gauge.
    6 i will have a boost controler.

    basicly i would like to have 15 to 18 pounds of boost with lightened valves, springs, ecu intercooler, and still have a reliable engine running at 8500 rpm's

    please help..............


  2. #2
    Site Admin Green Hulk's Avatar
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    1. what size turbo is good for 300 horsepower @ 15 to 18 pounds of boost
    Garrett GT28R

    2. do i need to change pistons to lower the compression
    No, you can run the stock pistons at 20 PSI of boost with no problems. These are already low compression engines from the factory.

    3. can i use a r d fuel controler to work like a ems.
    No! Use a Riva ECU with the rising rate fuel pressure regulator. Or use the Rotax Racing ECU with a programmable rude fuel controller. The Rude is programmable. The R&D is not.

    4. what size injecters for size of boost.
    50# injectors with the Riva ECU and use the rising rate regulator
    or
    63# injectors with Rotax Racing ECU and Rude programmable fuel controller.

    5.i will hook up a o2 senser to a a/f gauge.
    You will definitely need this

    6 i will have a boost controler.
    You will need this to limit the boost


    Remember, the rotax racing ECU has no knock control. The Riva ECU retains knock control and will also back out timing as boost increases. It is a much safer ECU to run at high boost levels. It's already mapped to run with 50# injectors so all you need to do is add the rising rate fuel pressure regulator and be done with it.

  3. #3
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    jerry what do you sell the rude controller for. can you work me a deal for for a few things

    50 lb inj

    riva ecu
    valve train upgrade
    pressure reg

  4. #4
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    Quote Originally Posted by Green Hulk View Post
    1. what size turbo is good for 300 horsepower @ 15 to 18 pounds of boost
    Garrett GT28R

    2. do i need to change pistons to lower the compression
    No, you can run the stock pistons at 20 PSI of boost with no problems. These are already low compression engines from the factory.

    3. can i use a r d fuel controler to work like a ems.
    No! Use a Riva ECU with the rising rate fuel pressure regulator. Or use the Rotax Racing ECU with a programmable rude fuel controller. The Rude is programmable. The R&D is not.

    4. what size injecters for size of boost.
    50# injectors with the Riva ECU and use the rising rate regulator
    or
    63# injectors with Rotax Racing ECU and Rude programmable fuel controller.

    5.i will hook up a o2 senser to a a/f gauge.
    You will definitely need this

    6 i will have a boost controler.
    You will need this to limit the boost


    Remember, the rotax racing ECU has no knock control. The Riva ECU retains knock control and will also back out timing as boost increases. It is a much safer ECU to run at high boost levels. It's already mapped to run with 50# injectors so all you need to do is add the rising rate fuel pressure regulator and be done with it.
    thank you jerry for that info

  5. #5
    Site Admin Green Hulk's Avatar
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    All the prices are listed in the online store.
    www.4-tecperformance.com

    You do not need a rude fuel controller with a riva ecu and 50# injectors. The rising rate regulator is all you need and is very simple to set up and use.

  6. #6
    The ski's have taken a "backseat" to the Corvette DarthAWM's Avatar
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    Quote Originally Posted by Green Hulk View Post
    All the prices are listed in the online store.
    www.4-tecperformance.com

    You do not need a rude fuel controller with a riva ecu and 50# injectors. The rising rate regulator is all you need and is very simple to set up and use.
    Where is the rise rate regulator available at? Will it be available in the online store?

  7. #7
    JFizzleJR's Avatar
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    It's there under ecus and injectors. $425 + $55 ship from Piranha Parts and the US based one will hopefully arrive in a week for testing.

  8. #8
    Site Admin Green Hulk's Avatar
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    It is already in the online store under ECU's and Injectors
    http://www.4-tecperformance.com/inde...ex&cPath=18_52

    Also, a quick way to find what you're looking for in the store is to use the search function at the top of the store.

    Thanks guys!

  9. #9
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by JFizzleJR View Post
    It's there under ecus and injectors. $425 + $55 ship from Piranha Parts and the US based one will hopefully arrive in a week for testing.

    Thanks James! The US version should be ready in a couple of weeks and will be much cheaper and won't have all the expensive international shipping.

  10. #10
    The ski's have taken a "backseat" to the Corvette DarthAWM's Avatar
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    Well don't I feel stupid

    Thanks guys.

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