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Thread: less cooke ecu

  1. #1

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    less cooke ecu

    what the pros and cons of the less cook ecu im about to get a 8800 ecu right now im at 7900 rpms with my et 68/140 can i run the ecu with riva 50lb and will i have problems


  2. #2
    u must use 60ib injector and high pressure fuel pump.....

  3. #3

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    Stevo,

    You must use the injectors that your ecu has been mapped to. Depending on your setup you may need 42lbs or 60lbs and you may need a rissing rate fuel pressure reg and a high pressure fuel pump.

  4. #4

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    guys first im just going to use the extra rpms that the ecu makes i dont plan on passing 8400 and thats in winter i have a rrfpr right now im at 7900 rpms so why would i need a bigger fuel pump

  5. #5
    Having Fun jp1300r's Avatar
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    What injectors are you going to run? I would replace a 04 fuel pump just to be on the safe side anyway and replace with a Walbro. It will only take a few second to toast your engine, if you have a fuel pressure problem. JMO.

  6. #6

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    Quote Originally Posted by jp1300r View Post
    What injectors are you going to run? I would replace a 04 fuel pump just to be on the safe side anyway and replace with a Walbro. It will only take a few second to toast your engine, if you have a fuel pressure problem. JMO.
    but wouldnt it show on my afr gauge and i want to put 50lb rivas in right now i have 48s with stock ecu and i has to turn down base pressure cause i have to much gas with my 48s and im running a et 68/140

  7. #7
    Having Fun jp1300r's Avatar
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    Quote Originally Posted by stevorxp007 View Post
    but wouldnt it show on my afr gauge and i want to put 50lb rivas in right now i have 48s with stock ecu and i has to turn down base pressure cause i have to much gas with my 48s and im running a et 68/140
    Oh it will show on your AFR gauge if you happen to be looking at it all the time. When the engine starts running bad at WOT and than you look at the gauge it will be too late.

    A Les Cooke ecu isn't like a stock ecu. Whats injectors is the Les Cooke mapped for? If you don't know, be careful or you maybe needing a engine soon.

  8. #8

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    its mapped for 60`s why cant i just turn up the pressure and use 50s

  9. #9
    Quote Originally Posted by stevorxp007 View Post
    its mapped for 60`s why cant i just turn up the pressure and use 50s
    More than likely the 60's will be lean with the 68-140ET charger.
    Most of the les ECU are super lean.

  10. #10
    Having Fun jp1300r's Avatar
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    Quote Originally Posted by stevorxp007 View Post
    its mapped for 60`s why cant i just turn up the pressure and use 50s
    The last few Les Cooke ecus I have seen needed 80s even though they were mapped for 60s per Les Cooke. My guess is you will need 100-120psi of FP to maybe be safe. The most I have ever seen was 90-95psi on a stock fuel system and was tapped out.

    RIVA type 50s lock up around 70-80psi.

    The higher you run the fuel pressure the less volume you get.

    Its best to keep your WOT fuel pressure below 65-70psi.

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