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Warmup enrichment question.
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Warmup enrichment question.
by Scottinva on Sun Jan 31, 2010 11:55 am
I am tuning my 1987 BMW 535i, and at 180 degrees the enrichment is 0 which is fine. However at 180 degrees the car is idling at 850-900rpm at 13.7afm. The problem I have is that when the car reaches its maximum temperature of around 188, the idle then goes down to 12.3 and stuff. The cars best idle is around 13.2 However if I give it enrichment at 180, it starts to affect the overall tune more than I would want it to. What can I do about this? Or should I just tune it for that 188, and add enrichment even if the car is at 160-180 degrees? I have logs and msq if needed.
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Re: Warmup enrichment question.
by devastator on Thu Feb 04, 2010 9:17 am
If I am understanding this correctly, you have a slightly lean issue when the WUE goes off and the temp increases to 188 right?
Doe the idle stay in the same rpm/kpa bin in the VE table? If not then just tweak the VE bin that the idle at 188 deg is in and drive on. Otherwise, you can change the high temp value for the WUE to 180 and just make it a very small value, (whatever is needed to put you where you want to be), and tune the idle for 188 degrees.
Doe the idle stay in the same rpm/kpa bin in the VE table? If not then just tweak the VE bin that the idle at 188 deg is in and drive on. Otherwise, you can change the high temp value for the WUE to 180 and just make it a very small value, (whatever is needed to put you where you want to be), and tune the idle for 188 degrees.
Sandrail-ACVW 2276 cc, Turbo
MS-II W/spark burning E85
The sand must be punished.
MS-II W/spark burning E85
The sand must be punished.
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Re: Warmup enrichment question.
by Scottinva on Thu Feb 04, 2010 11:09 am
Good point on adjusting the VE table, sadly the values stay within the same grouping. My idle VE values are all the same number, so I had some constants when tuning. I'm going to play with it some more today, and see what I come up with, I was trying to avoid running WUE all the time. However after look at Peter Florances tune (we have the same basic engine, with same injector size) he had to do the same thing. The thing is it still wants around 106 WUE at 180 degrees, while at 188(ish) it's fine with none. So I think ve anaylze is going to be confused since there will be a changing difference in WUE as I drive once warm. I have a bin at 180 and 190 as of now, and am using like 106WUE at 180, than 100WUE at 190. It seems to work pretty good, but not sure how much it will affect the overall VE.
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Re: Warmup enrichment question.
by devastator on Thu Feb 04, 2010 5:24 pm
Scottinva wrote:sadly the values stay within the same grouping. My idle VE values are all the same number, so I had some constants when tuning.
Can you change the RPM values in the VE table to "home in" on the one you idle at, and isloate it?
Sandrail-ACVW 2276 cc, Turbo
MS-II W/spark burning E85
The sand must be punished.
MS-II W/spark burning E85
The sand must be punished.
- devastator
- Master Squirter
- Posts: 592
- Joined: Mon Feb 11, 2008 10:19 am
- Location: Kinda near Tucson Arizona
Re: Warmup enrichment question.
by Scottinva on Mon Feb 08, 2010 10:24 am
Ya that is very true, maybe I can play with the resolution down there. What a great idea, thanks buddy.
- Scottinva
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- Joined: Sun Sep 06, 2009 3:24 pm
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