Hellen88 ETB support

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Creesic
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Hellen88 ETB support

Post by Creesic »

Running it by Andrey, seems as though the BMW Hellen 88 board will support an ETB. I'm doing this to delete the clunky factory IAC to make some room, and I could maybe use a few more features with an ETB anyway.

Would anyone happen to know how I can wire it in? And would anyone have any recommendations of one? Maybe 3" inlet?
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Re: Hellen88 ETB support

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Once we figure that out I will add some info to https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW
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Re: Hellen88 ETB support

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Just wondering if I can assign the pins myself in tunerstudio or something. Need to do a little more research on what wires are necessary on those in order for them to function.
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Re: Hellen88 ETB support

Post by nmstec »

e36? I had done the same thing with removing the IAC and PCV, and plasma cut myself an ETB adapter to fit a vw rabbit ETB on an M50 intake. I can get you a parts list of it, but mines a big ridiculous since im turbo charging it.
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Re: Hellen88 ETB support

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nmstec wrote:
Sat Jan 01, 2022 12:20 am
e36? I had done the same thing with removing the IAC and PCV, and plasma cut myself an ETB adapter to fit a vw rabbit ETB on an M50 intake. I can get you a parts list of it, but mines a big ridiculous since im turbo charging it.
E34 TU with an NV in it. Used the TU harness. What engine was it from? Might be a simple solution, or I could just run a generic GM part.
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Re: Hellen88 ETB support

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Would an M54 intake manifold with ETB fit?
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Re: Hellen88 ETB support

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Re: Hellen88 ETB support

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Thanks for this, but no, because I'm using https://www.ebay.com/itm/401736590801 as a manifold. Have to adapt something up to that. Might as well go larger.
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Re: Hellen88 ETB support

Post by stefanst »

Creesic wrote:
Sat Jan 01, 2022 7:39 pm
Thanks for this, but no, because I'm using https://www.ebay.com/itm/401736590801 as a manifold. Have to adapt something up to that. Might as well go larger.
That's an interesting looking manifold. Do you by any chance have a dyno comparison to the stock OBD1 intake?
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Re: Hellen88 ETB support

Post by AndreyB »

Creesic wrote:
Sat Jan 01, 2022 12:12 am
Would anyone happen to know how I can wire it in?
Molex 0039301020 would be the part to solder to PCB. Open question what would you need to make the harness side - that's for DC motor on the ETB. Somewhere there must be pins for pedal and TPS many answers would be in PCB schematics I assume
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Re: Hellen88 ETB support

Post by Creesic »

The more I look at the pinout, the more it looks like I'm just going to have to go Proteus. It doesn't look like this will just accept an electric pedal and ETB without a completely new PCB.
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Re: Hellen88 ETB support

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Doesn't look like there's a Proteus in stock, so I guess we're back to modifying the Hellen. I do have that connector, though it's not labled at all for an ETB or PPS.

Would modification to the board to accept those things be simple enough to do?
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Re: Hellen88 ETB support

Post by AndreyB »

Creesic wrote:
Fri Feb 04, 2022 5:25 am
Doesn't look like there's a Proteus in stock
I am looking at a stack of Proteus ECUs in stock. It looks like you've made some assumption based on something?
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Re: Hellen88 ETB support

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Creesic wrote:
Fri Feb 04, 2022 5:25 am
I do have that connector, though it's not labled at all for an ETB or PPS.

Would modification to the board to accept those things be simple enough to do?
I would love to help but I've lost the contest.

Let's begin from the beginning. Let's pick a simple and specific project and approach this one project at a time.

Do you have electronic pedal in your possession? Do you have all information you need to wire in two channels of throttle pedal?
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Re: Hellen88 ETB support

Post by Creesic »

There just went any for sale on eBay. Assumed you were waiting on more to come in.

Context is I'm trying to make an ETB work on my Hellen 88 for my E34.

I do have a PPS I can use and an ETB. I have no clue how to wire it into the Hellen 88 and that's what this post is about. It's not labled anywhere to be used that way.
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Re: Hellen88 ETB support

Post by AndreyB »

I need your help in pin pointing where does your understanding of this board end at the moment :)

Q1: are you aware of https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW

Q2: does above link to https://github.com/rusefi/rusefi/wiki/Hardware/Hellen/hellen88bmw-a-schematic.pdf

Q3: did you have a chance to find J20 and J21 on the schematics

Q4: did you have a chance to locate J20 and J21 on the actual PCB.

Q5: did you have a chance to locate silkscreen of J20 and J21 on the back side of the PCB

Q6: are you currently blocked in terms of deciding how to physically connect to J20 and J21

Please give me a one-five word response for each of these six questions just for me to better understand where are you blocked on the overall journey exactly.
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Re: Hellen88 ETB support

Post by AndreyB »

Creesic wrote:
Fri Feb 04, 2022 1:42 pm
There just went any for sale on eBay. Assumed you were waiting on more to come in.
Gotcha. Just clarified that on https://rusefi.com/forum/viewtopic.php?p=44274#p44274
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Re: Hellen88 ETB support

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AndreyB wrote:
Fri Feb 04, 2022 3:44 pm
I need your help in pin pointing where does your understanding of this board end at the moment :)

Q1: are you aware of https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW

Q2: does above link to https://github.com/rusefi/rusefi/wiki/Hardware/Hellen/hellen88bmw-a-schematic.pdf

Q3: did you have a chance to find J20 and J21 on the schematics

Q4: did you have a chance to locate J20 and J21 on the actual PCB.

Q5: did you have a chance to locate silkscreen of J20 and J21 on the back side of the PCB

Q6: are you currently blocked in terms of deciding how to physically connect to J20 and J21

Please give me a one-five word response for each of these six questions just for me to better understand where are you blocked on the overall journey exactly.

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Yes, and no to the rest. Now that I'm going ahead with it, I'll try to learn how to use the schematics. I'll report back here if I come across another issue. Thank you.
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Re: Hellen88 ETB support

Post by Creesic »

Actually, now that I'm looking at it, where are the + and - connections for the ETB motor?
Still learning to navigate this stuff.

I'm gonna try to cross reference labels from the MRE, maybe I can find it that way.
-Edit: "E-THROTTLE+" or "E-THROTTLE-" do not appear in the Hellen88 schematic like they do in the MRE schematic.

Gonna try to find another solution.


I've located J20 and J21 physically. I understand what goes where here, however I'm still lost on where the E-THROTTLE+ and - are supposed to connect.

Found it? E14 and E15? +ETB and -ETB?
Last edited by Creesic on Thu Feb 17, 2022 7:33 pm, edited 1 time in total.
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Re: Hellen88 ETB support

Post by AndreyB »

See https://github.com/rusefi/hellen88bmw-issues/issues/47 it would probably clarify

I've also improved https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW#auxiliary-pins section of the documentation just a bit
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Re: Hellen88 ETB support

Post by Creesic »

AndreyB wrote:
Thu Feb 17, 2022 7:28 pm
See https://github.com/rusefi/hellen88bmw-issues/issues/47 it would probably clarify

I've also improved https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW#auxiliary-pins section of the documentation just a bit
Gotcha. J19 is the DC motor + and -
J20 and J21 are for the TPS and PPS. Thanks Andrey!
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