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  #11  
Old 09-10-2013, 04:31 PM
infinkc infinkc is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

Will have to look at the diagram later when i get home, some reason i cant enlarge the one i posted up to compare with, think i actually uploaded the thumbnail instead.

was thinking on the failsafe, there is a "J808" bypass valve on the charger, looks like it it from this diagram, that it default open, so if you cut the motor on it, it should open up, bypassing the boost. Only issue to to trick the other wires so it doesnt throw a cel if it goes into failsafe.

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  #12  
Old 09-10-2013, 06:17 PM
Richard L Richard L is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

This is a good find. I was looking for BCV until I realised the car is supercharged. So this valve should work, need to know how to approach this.

Cutting the motor control wire may not work, it might just stay in the same position since the ECU is controlling the position of the flop by the two wires to the v308, based on the J808's voltage feedback.

If the voltage of J808 goes outside the 0.5 to 4.5V, the motor will go immediately to full bypass mode and drop boost.

I suggest we can intercept the feedback signal and force the flap into a more open position. This way, it might not throw a code and we can achieve our failsafe activation without having to recycle the ignition key.

There are several ways to achieve this by the HFS4. Do you have the car on your drive yet? We can start working on this.
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  #13  
Old 30-12-2013, 07:50 PM
infinkc infinkc is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

Richard, i had a question on the controller jumper settings, your diagram you have 2.5 MAP, the instructions for the hfs4 say if for 2.5 use the 3 setting. I am using a controller that had a sticker in it with 2.5 circled already but the jumper was on the "2". It was configured previously for a 335i N54. Do i still change it to "3"?

Second question, i am running direct port (6 jets) do i set the sensor jumper for "1-2"
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  #14  
Old 31-12-2013, 12:03 AM
Richard L Richard L is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

I can't seem to find the page where the manual says for 2.5 use 3 setting. It may be on one of the earlier manual (pre v2).

- HFS4-v1 has 2 or 3 bar map sensor option.
- HFS4-v2 has 2.5 or 3.5 map sensor option.

If you have a v1, for 2.5 use 3 setting. Hope this clarifies it.
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  #15  
Old 31-12-2013, 12:07 AM
Richard L Richard L is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

I was wondering if we inject some voltage to the valve, can we fool the ECU to perform a partially opened state.
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  #16  
Old 31-12-2013, 07:43 AM
infinkc infinkc is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

Quote:
Originally Posted by Richard L View Post
I can't seem to find the page where the manual says for 2.5 use 3 setting. It may be on one of the earlier manual (pre v2).

- HFS4-v1 has 2 or 3 bar map sensor option.
- HFS4-v2 has 2.5 or 3.5 map sensor option.

If you have a v1, for 2.5 use 3 setting. Hope this clarifies it.
How do I tell if it's a v1 or 2? The manual I pulled from the howertonengineering site which is the v1.

Quote:
Originally Posted by Richard L View Post
I was wondering if we inject some voltage to the valve, can we fool the ECU to perform a partially opened state.
Yea I need to play around and see what will be the best option to get the fail safe working. I should have it all up and running tomorrow.
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  #17  
Old 31-12-2013, 08:16 AM
Richard L Richard L is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

Can you tell me the serial number of the controller.

It is confusing to pull a manual from a site rather referring to the original printed manual accompanying the system.

There are some small prints on the circuit board along the bottom edge. If it is ... iss4. It will be the version 2.
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  #18  
Old 31-12-2013, 09:04 PM
infinkc infinkc is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

serial 1xxxxx

Last edited by infinkc; 01-01-2014 at 04:39 AM.
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  #19  
Old 01-01-2014, 12:09 AM
Richard L Richard L is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

This is an earlier one, v1.

You need to link "3" for a 2.5 bar map sensor.
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  #20  
Old 02-01-2014, 04:37 PM
infinkc infinkc is offline
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Default Re: Hfs-4 wiring for Audi B8 s4 3.0 (2009-2013)?

Another question, does the RED 95% LED need to come on during full load? Wasnt really clear to me in the manual. Seems you dont want it to come on if i read it correct. Mine does not illuminate.

Here is a quick shot of my install, will make a thread in the gallery when i get more pictures uploaded.


Last edited by infinkc; 02-01-2014 at 04:42 PM.
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