Optimizing D-Jetronic, Brainstorming.... |
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Optimizing D-Jetronic, Brainstorming.... |
pbanders |
Apr 18 2007, 04:28 PM
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#1
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Senior Member Group: Members Posts: 939 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
Here are my thoughts on a systematic approach to optimizing D-Jetronic for a specific stock or near-stock engine - just putting this down and looking for comments:
Comments? If the intake system has been significantly modified (e.g. different cam, big valves, etc.), then to do the dyno procedure correctly, an assessment of the VE changes would need to be made, and the ECU daughter-card SC circuit would need mods - but this is beyond a reasonable approach for most people. |
brp914 |
Apr 20 2007, 01:57 PM
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#2
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Unregistered |
Does the adjustment on the ecu only affect idle mixture or is it across rpm range, or what? I added a 500 ohm on my '76 and then dialed down the ecu as low as possible to maintain stable idle after aar closes, but not really warm. But if the ecu knob is idle only I may be running lean at speed. I never monkey with mps's.
QUOTE Why do you want a richer mixture once the motor is warmed up? From what I've seen, there are more problems with 914's due to rich mixture than due to lean mixture. lean running will lead to higher temps and possibly valve seat problems (as in falling out). |
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