What is max boost on stock pullies? 10 psi?
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From: The Granite State
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What is max boost on stock pullies? 10 psi?
I finally figured out how to datalog with the new EuroCharged EuroFlash v2.0 software! (another DIY thread is coming soon... 
)
So today I went out and did a couple of pulls and as I scroll through the datalog my boost seems to max out at 9.0 psi
I thought it was supposed to be a bit higher than that, but I also just added a set of MBH headers so it's possible that I'm losing some boost from those....
Anyone know how to calculate A/F ratios using the data in these logs?
-G
)So today I went out and did a couple of pulls and as I scroll through the datalog my boost seems to max out at 9.0 psi
I thought it was supposed to be a bit higher than that, but I also just added a set of MBH headers so it's possible that I'm losing some boost from those....
Anyone know how to calculate A/F ratios using the data in these logs?
-G
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From: Florida
A Merc
The afr are narrow band lambda
The headers will lower your boost since its less restrictive and will help breath better
Although your boost went down your power went up from stock
What's important is that the power went up
The headers will lower your boost since its less restrictive and will help breath better
Although your boost went down your power went up from stock
What's important is that the power went up
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MBWorld Fanatic!
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From: The Granite State
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There is a column with O2 voltage values....i think these can be used to calculate and convert to an A/F ratio? I think I saw a post here somewhere showing how to convert raw lambda values to AFR but I'll have to search again.
-G
Last edited by GregMB; Jun 15, 2013 at 01:17 PM. Reason: Fixed data
MBWorld Fanatic!
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From: Jacksonville, FL
05 White Pano E55, Cadillac CTS-V
Your boost reading will fluctuate depending on outside weather. For example, when it is 50 out it may say 8psi or when it is 90 out it may say 10psi. As for air/fuel multiply by 14.7.
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2005 E55 AMG, 2012 GL550, 2000 Ford Lightning, 2005 Chevy Silverado 2500HD
If you watch the MAP pid you can calculate boost. Start by getting the reading at KOEO- this is the atmospheric pressure read by the MAP at that point in time. When you make a pull record the the readings from the MAP. They will be in "inhg". To calculate boost look for the values higher than the base (KOEO) number. The conversion goes like this:
Reading - base x .49 = psi
Example: max reading was 55 inhg, base was 29.90
So the math looks like this... 55 - 29.90 = 25.1 x .49 = 12.299
Reading - base x .49 = psi
Example: max reading was 55 inhg, base was 29.90
So the math looks like this... 55 - 29.90 = 25.1 x .49 = 12.299
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MBWorld Fanatic!
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From: Jacksonville, FL
05 White Pano E55, Cadillac CTS-V
Actually it depends, there are factors (all the stuff that goes in to calculating air density).
Uhh, the data logs clearly spell out boost in psi in a column and there is another column giving the kpa value that the map sensor reads before it is converted in to psi for the other column next to it in the log. Not sure what all you are talking about.
If you watch the MAP pid you can calculate boost. Start by getting the reading at KOEO- this is the atmospheric pressure read by the MAP at that point in time. When you make a pull record the the readings from the MAP. They will be in "inhg". To calculate boost look for the values higher than the base (KOEO) number. The conversion goes like this:
Reading - base x .49 = psi
Example: max reading was 55 inhg, base was 29.90
So the math looks like this... 55 - 29.90 = 25.1 x .49 = 12.299
Reading - base x .49 = psi
Example: max reading was 55 inhg, base was 29.90
So the math looks like this... 55 - 29.90 = 25.1 x .49 = 12.299
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2005 E55 AMG, 2012 GL550, 2000 Ford Lightning, 2005 Chevy Silverado 2500HD
Most generic scanners read the MAP value in inches of Mercury "inhg". If you have equipment that does the conversion to psi...Good for you, but not everyone lives in your World.
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From: Jacksonville, FL
05 White Pano E55, Cadillac CTS-V
Uhh, this thread is about the Eurocharged software that has datalogging and does exactly what I just said genius........ So the OP of this thread IS LIVING IN MY WORLD!
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2005 E55 AMG, 2012 GL550, 2000 Ford Lightning, 2005 Chevy Silverado 2500HD
Wow! I try to give solid technical info and you simply want to be a Dick! Proud of you! You have managed to prove that Internet Warriors are rampant on, what would be good entertaining and informative, Forums! SMDH!
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From: Jacksonville, FL
05 White Pano E55, Cadillac CTS-V
I am sorry but the OP did not ask "how do I read or calculate boost." I see you are new here so probably aren't familiar with the Eurocharged software or any logging software for this car for that matter which tell you boost. There is no math and formulas needed for a boost reading.
What comes off as "being a dick" to you is "stating the obvious" to others who clearly read a psi number on their log.
What comes off as "being a dick" to you is "stating the obvious" to others who clearly read a psi number on their log.
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2005 E55 AMG, 2012 GL550, 2000 Ford Lightning, 2005 Chevy Silverado 2500HD
Gotcha. I read the post, but there are many people that read these post. Not all of them are using Eurocharged hardware/software. My response was aimed to help those that seek answers. I am not here to argue or have a virtual fight with anyone. I'll leave you to handle it from here on. Peace!
Last edited by marcmaddox; Jun 15, 2013 at 06:40 PM. Reason: Spelling
MBWorld Fanatic!
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From: Jacksonville, FL
05 White Pano E55, Cadillac CTS-V
Not just the Euroflash datalogging reads boost (spelt out to you, i.e. no math needed), some others that people use do too, but like I mentioned this thread was about the Eurocharged Euroflash anyway.
Last edited by urbamworm; Jun 15, 2013 at 06:49 PM.
Senior Member
Joined: Apr 2012
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From: Central PA
'05 E55
Can I steer this back to some good/useful info by asking if anyone knows that the stock MAP puts out voltage-wise? I'm curious to log from it outside of using OBD (too damned slow).
Any help is appreciated.
Thanks.
Any help is appreciated.
Thanks.
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From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
You can do it two ways. As Hulk said, run a boost tap and use an independent sensor. Or tap off of the stock one. It's a 2.5bar sensor so 0v is 0 bar (full vacuum) and 5v is 2.5 bar (22.05 Psig). PM me if you want to do it and I can send you wiring diagrams and locations on the ecu. I'm real time logging MAP, IAT, TPS, Rpm, and Afr for the exact reasons you mentioned.
