FI-Exhaust Valve Vacuum Pickup Point - BMW M5 Forum and M6 Forums
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post #1 of 22 Old 21st May 2016, 12:32 PM Thread Starter
rt7085
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FI-Exhaust Valve Vacuum Pickup Point

I am considering getting a BMW 60 M5 Valvetronic Exhaust System - Fi Exhaust for my beast. However, it wants a vacuum connection to operate the valves. What is the best place to pick up vacuum? Near the vacuum assist pump or elsewhere? Did anybody else do this? Or should I just go for Eisenmann mufflers and call it the day? I like the valve aspects to quiet it down a bit when needed.

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post #2 of 22 Old 21st May 2016, 01:23 PM
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I would probably pick it up somewhere near the top left side of the engine bay for ease of keeping an eye on it. As for the system, vacuum is vacuum and it wouldn't care. That large "air" tank while correctly named really serves as a vacuum accumulator so valve operation won't cause pressure transients and disrupt engine operation.

If you wanted to be really cool, find someone who has a bunch of extra vacuum pumps, install one near the air tank as a standalone system.
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post #3 of 22 Old 21st May 2016, 02:04 PM Thread Starter
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Yes. That may be easier in fact, at least for me. I wish the whole thing was electrically actuated like the GT2. I can see if I could retrofit something like that.

If I put a pump in my trunk, then I want it such that it stops pumping at a certain pressure level, to avoid the noise when I do not use it. So, I would have to rig something up like that. Sounds like a project again. Is PT-CAN available in the back somewhere? Such that I can put the controller box there as well? Mounting it on the OBD-II is stupid.

See PM.

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post #4 of 22 Old 21st May 2016, 02:27 PM
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Quote:
Originally Posted by rt7085 View Post
Yes. That may be easier in fact, at least for me. I wish the whole thing was electrically actuated like the GT2. I can see if I could retrofit something like that.

If I put a pump in my trunk, then I want it such that it stops pumping at a certain pressure level, to avoid the noise when I do not use it. So, I would have to rig something up like that. Sounds like a project again. Is PT-CAN available in the back somewhere? Such that I can put the controller box there as well? Mounting it on the OBD-II is stupid.

See PM.
The box will be looking for data on the K or D CAN bus as PT-CAN isn't available in the OBD plug (wouldn't that be handy though?). I would think you could contact a EE somewhere and build a small latching relay vacuum switch arrangement for you. :P
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post #5 of 22 Old 21st May 2016, 02:50 PM Thread Starter
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Quote:
Originally Posted by jcolley View Post
The box will be looking for data on the K or D CAN bus as PT-CAN isn't available in the OBD plug (wouldn't that be handy though?). I would think you could contact a EE somewhere and build a small latching relay vacuum switch arrangement for you. :P
Truthfully, I don't really care about RPM dependent valve actuation. On and off is just fine LOL!
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post #6 of 22 Old 21st May 2016, 04:16 PM
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Quote:
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Truthfully, I don't really care about RPM dependent valve actuation. On and off is just fine LOL!
Post #8 Cat Delete thread

Testing and sound today
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post #7 of 22 Old 21st May 2016, 07:58 PM Thread Starter
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post #8 of 22 Old 23rd May 2016, 05:03 PM
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Assignment complete professor RT.
Don't know if this is the place, but it is Your thread, so here we go....

Liking the SS non res xpipe and the Etronic more and more so far.

Pretty much as advertised, and that ain't easy.Power seems to be the same. Thought I might have lost a little, but was so enthralled in the sound, I was in p400.
Rediscovered the M button, left the poor guy next to me in a Really loud cloud of dust

Here's a couple of pics and vids, full review and hopefully better vids and sound to come

Todays helper, remote and $1300 Dinmann keychain



Current mic setup (trying to make Woody proud)



Fitment of 100mm slant cut and black back boxes



Videos







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post #9 of 22 Old 24th May 2016, 04:53 AM
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