Posts by Airborne

  • Haltech ECU

    Dave@DDMWorks  rabtech

    Does the EVAP Solenoid line at the Intake Manifold have a one-way check valve?


    Looks like the DDM EVAP delete kit comes with a rubber cap that goes to the intake manifold. But my intake manifold may be between 15-25psig.

    I could remove the intake manifold and put a boost rated "Airborne" custom cap if needed. :)


    Would I need the DDM EVAP delete kit with a Haltech ECU, I believe not?



  • What was today's Sling project-Mods , goodies....?

    Alrighty. Did not get a chance to weigh the scooter today, but changed the fluid to Dex-cool as recommended by you guys. Thanks you for the advise.


    wokka I checked the plastic reservoir temp on the exhaust side. It was surprisingly cool. I’ll upgrade to the aluminum after dumbing money into the traction department.



    So the Polaris distributors will replace this assembly free of charge? Looks like I’ll be heading there next weekend. LOL 🤦‍♂️



  • Fuel Pressure

    rabtech Great videos and detail! Thank you!


    1) What is the fuel pressure from the pump (before the regulator) at those flowrates? above 82psi, but wonder the actual... :)


    2) Looks like you are running about 12.8 AFR and 45% injector duty cycle. Do you think it is possible to run higher injector duty cycle and consequently 9-10 AFR, to significantly reduce cylinder temps and delay early combustion (knock)?


    3) Here the AFR is better, but the Ignition Timing is in the teens...

    Do you ever get the fuel injectors near 90-95% duty cycle @ 23-24psig manifold pressure?


    4) Do you have makes and models of the components you are running for the fuel system or recommended parts if you did it again?

    - Fuel Pump (to reach 55psi + Boost) = Stock Polaris (Max ??psig @ 24psiBoost/12.8AFR/45%InjectorDC)

    - Manifold Pressure Referenced Fuel Pressure Regulator (MPRFPR)

    - Fuel Filter


    My apologies if I am misstating something here. And thank you for your support and time. :)

  • Fuel Pressure

    rabtech True. Thank you for the feedback. Luckily DDM Fuel Rail has enough extra ports for return line and fuel pressure sensor (which will go to my Haltech analog input, future)

    Do you have makes and models of the components you are running for the fuel system or recommended parts if you did it again?

    - Fuel Pump (to reach 55psi + Boost)

    - Manifold Pressure Referenced Fuel Pressure Regulator (MPRFPR)

    - Fuel Filter

    - Accessories


    Trying to build a road map for me and future 93 octane fuel system builders.

    Your support is much appreciated :)

  • Haltech ECU

    rabtech You are the Man!!! Figured you would catch one of my posts at some point, muchos gracias!


    I will refer to your numbering system above rabtech :

    1. I was thinking this was the case, which is fine because I don't like traction control.


    2. I've grown to enjoy the Power Steering, and like mentioned reduces steering system stresses. Do you know how I can bypass the additional communication wires to the Power Steering Module? I pretty sure it only needs 2 wire (+12VDC & 0VDC) with a toggle switch, which you mentioned?

    If not, I could get down there with a multimeter/oscilloscope to figure out what to do.


    3. Agreed. All wires (15+ X() from the ABS Module come from the ECU. I'm planning to remove that harness and the ABS Module, then add hydraulic line adapters to fill in the gap. Have you done or heard of someone removing the ABS Module?


    4. I'll be using the Haltech IC-7, so I can get all the sensor values displayed on one screen. Notice I like removing and not adding things... LOL


    5. I don't really have a dash, so... Fitment should be easy. Note, I'll remove every display/gauge/fiberglasscover and replace with Haltech IC-7.


    6. Very nice! I'm not sure what which other ECU you are referring to, but Haltech is about to start selling the Nexus R5, which I may or may not wait for. It uses the same Haltech software, wifi, 5x25A outputs, wideband controller and more built-in one compact unit.


    rabtech Thank you for the photos also. What intake manifold are you using? I can see a piece of your throttle body elbow...