Running a Northstar on a LS1 PCM. - Page 14
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Cadillac Powertrain Control Module (PCM) Tuning Discussion, Running a Northstar on a LS1 PCM. in Cadillac Engine Technical Discussion; Originally Posted by Starfire88 For 100% clarity which transmission are you able to run with the LS1 PCM? The was ...
  1. #196
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by Starfire88 View Post
    For 100% clarity which transmission are you able to run with the LS1 PCM?
    The was originally a RWD Manual trans Program. I have it running with a FWD Manual trans. I also had it running in a car with a SECOND controller for the 4T80E. This was similar to an 06 DTS setup.

  2. #197
    cbulen is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    AJ
    Willl the LS1 PCM support an aftermarket fuel pump? I am planning on using a 255 lph Supra fuel pump in my MR2 + NOrthstar project, and I think this fuel pump is actually too big at lower RPMS/lower horspower (ie not wide open throttle). THe SUpra Turbo Computer controls the fuel pump by dropping the voltage it supplies to the pump when you are not driving the SUpra at WOT. It kicks up the voltage when more gas is needed. This pump is capable of up to around 750 hp.

    http://www.gadgetonline.com/FuelPump.htm

  3. #198
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
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    Re: Running a Northstar on a LS1 PCM.

    GM doesn't manage the fuel pumps like others, Ford does this now too. GM just puts injector characterization data in the PCM so it can compute instead of try to mechanically manage it.

    GM does on the Supercharged bump up the fuel pump speed, known as a 2 speed pump. Like my SC 3800, around 125 kPA it kicks in the second speed of the pump.

    Quote Originally Posted by cbulen View Post
    AJ
    Willl the LS1 PCM support an aftermarket fuel pump? I am planning on using a 255 lph Supra fuel pump in my MR2 + NOrthstar project, and I think this fuel pump is actually too big at lower RPMS/lower horspower (ie not wide open throttle). THe SUpra Turbo Computer controls the fuel pump by dropping the voltage it supplies to the pump when you are not driving the SUpra at WOT. It kicks up the voltage when more gas is needed. This pump is capable of up to around 750 hp.

    http://www.gadgetonline.com/FuelPump.htm

  4. #199
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
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    Re: Running a Northstar on a LS1 PCM.

    GM also uses a PWM fuel pump on many other newer cars and trucks and the Fuel System is a returnless on-demand design.

    This is not supported by the older LS1 type PCM.

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