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Old 01-03-2018, 11:56 AM
Mid_Night_F20 Mid_Night_F20 is offline
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Default BMW N20 EWG - HFS4v2 install

Does anyone have any instructions for a bmw N20 EWG motor?

Primarily I need to know to wire up the fuel pressure sensor and the DI injectors as well as the failsafe functions.

Any help would be much appreciated
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Old 03-03-2018, 09:04 AM
Richard L Richard L is offline
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Default Re: BMW N20 EWG - HFS4v2 install

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Old 05-03-2018, 12:27 PM
Mid_Night_F20 Mid_Night_F20 is offline
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Default Re: BMW N20 EWG - HFS4v2 install

Thanks, but do you have the diagram for the same car but for the HFS4v2 ?

Tom
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Old 05-03-2018, 08:44 PM
Richard L Richard L is offline
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Default Re: BMW N20 EWG - HFS4v2 install

Unfortunately we do not have one. Wiring is identical. The only difference is the x2.5 IDC pre-scaler is done on the underside of the circuit board instead of above.
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Old 06-03-2018, 03:17 AM
Mid_Night_F20 Mid_Night_F20 is offline
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Default Re: BMW N20 EWG - HFS4v2 install

Thank you Richard !

My car will be tuned for a maximum 23/24psi

Few more important questions:

1.
If I'm going to use the factory windshield washer fluid tank for the meth which has a low sensor inbuilt can I totally disregard the blue "TRUNK" harness?

2.
For my hfs4v2 , can you confirm if these settings are correct: (map sensor: 3, PA gain: 2.5, F/S MPS: 2) ?

3.
My car has basically no lag and I don't want meth spraying on low boost, what can I do to start kicking in the water/meth around 14psi and reach full by say 22psi or so?

4.
How to set the AUXFS?

I will being a DIY install and post it up on the forum once I'm done.

thanks in advance!

Tom
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Old 06-03-2018, 08:49 AM
Richard L Richard L is offline
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Default Re: BMW N20 EWG - HFS4v2 install

1. The blue harness does two things, early water level warning and turning the water pump on. It is not advisable to disregard it. The system is designed to be truck mounted, not exception because the pump is not water proof.

2. All correct

3. If you car has no lag, use IDC as a trigger. Our system does not trigger according to boost pressure as it is different in each gear. Trigger via IDC% is very reliable as it represents engine load more accurately. Boost without RPM or Throttle reference is meaningless. You need to get your head around this.

4. Do do not have an instruction booklet?
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