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VaccaRabite |
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#1
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En Garde! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 13,468 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region ![]() |
I'm doing some remote tuning through PMB for my injected 2056. The tune is close and I've been driving it but there are improvements that could be made now that I have had about a year and change since my last tuning session.
Eric suggested I move my O2 bung from the muffler (where I knew the location was not ideal but it got to sample all 4 cylinders) to one of the exchanger pipes (much better/hotter location, but only get to sample one cylinder.) Tapping into the Cylinder 1/2 bank would be easiest, and I was thinking of going into Cyl 1 since the pipe is shorter and maybe a little hotter. So now the question is what cylinder is the one I want to TIG weld the bung into. I don't track EGT so I don't really know if one pipe is hotter then another. And I want to eventually get heat back in my car so I can't go to headers which would allow me to sample all the cylinders before the muffler. Thanks! Zach @Eric_Shea |
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VaccaRabite |
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#2
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En Garde! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 13,468 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region ![]() |
@JamesM
James! How did I miss that you were the JamesM on 914World! I'm very glad you chimed in as I clearly missed the thrust of your email to me on this. Should I just put the Triad back on for your tuning? Is the bung in the center pipe sufficient? I don't have access to a bursch with a bung for testing. I have to think the gas in the Triad will also be too cold - but it won't have the reversion issues. Zach |
JamesM |
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#3
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,922 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region ![]() |
@JamesM James! How did I miss that you were the JamesM on 914World! I'm very glad you chimed in as I clearly missed the thrust of your email to me on this. Should I just put the Triad back on for your tuning? Is the bung in the center pipe sufficient? I don't have access to a bursch with a bung for testing. I have to think the gas in the Triad will also be too cold - but it won't have the reversion issues. Zach I cant say for sure as I haven't ran that setup yet, but in theory the Triad should produce better results. The glass packs used on the Triad are pretty wide open though and the pipes are pretty large so the chance still exists that fresh air might be getting pulled far enough back into the system at idle to screw up the readings. Wont know until someone trys it. If anything I am hoping it will at least decrease the response time for the O2 reading. right now im seeing over 1 second between a change in injector pulse width before the corresponding change in O2 reading shows up in your datalogs. I actually disabled closed loop operation in the last update to your tune that i sent this weekend for that very reason, to much lag in the sensor reading to be of any value. Dont want the engine attempting to adjust mixture real time off a reading that is already over a second old. |
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