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Registered
Join Date: Jun 2002
Location: The Netherlands
Posts: 62
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Data Logging
Here is a chart from my log file showing a first and second gear pull. I guess, regarding my EFI tuning and "drag racing" ability, the log doesn't lie
 ...  Current issues/ questions: 1. Cannot launch hard ( have to really slip out the clutch or rear end skips and knocks the car out of gear). Gearbox problem? 2. First to second gear shift is very rough. Synchros? 3. Engine running too rich (under 12:1 at times). Reduced power? Any comments would be appreciated. |
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06-21-2004, 01:13 AM
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Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,794
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What equipment do you have for your data acquisition? I like it.
BTW, one second to shift 1-2 is not bad for these cars. I have found the higher the rpm in 1st, the tougher the shift. I have a 901, which makes it even harder. |
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06-21-2004, 06:57 AM
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Join Date: Jun 2002
Location: The Netherlands
Posts: 62
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The data logging is part of my DTA EFI system. Just kills me that it takes as long to shift as it does to almost redline 1st...
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1982 911SC Targa 3.6 (now Cabriolet!!!) |
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06-21-2004, 07:25 AM
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Registered
Join Date: Dec 2001
Location: MA USA
Posts: 2,938
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Have you got the fuel correction map to work yet? I just got mine to work and am playing with it. How did you get the DTA to make that spiffy graph?
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Dean 911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno, |
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06-21-2004, 05:32 PM
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Registered
Join Date: Jun 2002
Location: The Netherlands
Posts: 62
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The DTA generates a log file. I simply import it to excel and create a chart with the data.
I am still playing with my basic maps, had some good runs last night. I will post later.
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1982 911SC Targa 3.6 (now Cabriolet!!!) |
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06-21-2004, 11:25 PM
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Registered
Join Date: May 2003
Location: Vancouver or... ?
Posts: 1,025
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How are you picking up TP data? The only variables are WOT and idle switches, no? These are just on/off configurations - not throttle position.
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06-22-2004, 05:42 AM
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Registered
Join Date: Jun 2002
Location: The Netherlands
Posts: 62
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Throttle position is sent via a rotary throttle position sensor (colvern pot) mounted on the throttle bodies.
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1982 911SC Targa 3.6 (now Cabriolet!!!) |
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06-22-2004, 05:52 AM
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Registered
Join Date: Jan 2001
Location: Kirkland, Washington
Posts: 1,095
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I think the reason your car is popping out of 1st and is rough into 2nd is that YOU ARE DRAG RACING A 911SC!!!
Oops, sorry for raising my voice...
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Jamie79SC |
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06-22-2004, 08:07 AM
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