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Showing results for tags 'motec'.
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I like 3.2's. I didn't plan to buy another one, it just sorta happened. The fact that it wasn't perfect and needed a lot of work was part of its appeal as I didn't feel like it had to be bought back exactly to standard or to become just another "paint by numbers" 3.2 equipped with a Wong chip, a set of Turbo tie rods, Wevo shifter and Monty muffler that my '85 was. Nothing wrong with this but I think the world has moved on to the point where modern aftermarket ecu's are a viable upgrade. Anyway, enough yakky yak, let's talk what's happening at the moment: Cold Start Tuning The weather has been perfect lately to complete cold start tuning that my professional tuner was never going to experience due to his location. Consequently I've been adjusting the Engine Cranking Fuel Volume Compensation and the Engine Post Start Fuel Volume Compensation to have sufficient enrichment at low temperatures that the engine would fire and then idle for a sufficient time for the heads in particular to warm up enough so that continued enrichment is not required. How's this done? With a Motec, the Engine Cranking enrichment is a simple table of cylinder head temperature (coolant temp in normal applications) and engine revolutions (up to 6 cycles) in which the desired enrichment trim as a percentage is tabled. With the Post Start enrichment, a similar table is constructed of head temperature and engine running time (in my case, 0, 5, 10, 30 and 60 second increments): Being blessed with a snowy morning wasn't to be wasted today for cold start tuning: I'm happy now with the cranking enrichment as the engine fires quite quickly but I need to increase the enrichment in post start table in the sub zero cells in the first 5 seconds of start up as it still currently barely runs at head temps of about 5 degrees or less for those first few moments . I'll probably go up another 20% or so. After being used to using a screw driver to adjust carburettors, using a laptop is something of a novelty for me! However I am amazed at how creamy smooth and toey the engine is when stone cold and it takes a lot of self control to keep it under about 3 grand until the oil temperature comes up. Not like an old Motronic setup at all.
After a few weeks of running around in our newly acquired 928 I'm pretty sure it's running quite rich. So it might be nice to find a good dyno/tuning option but the engine's on a motec...which I assume means we need somewhere with the capacity to work with it (m48 system). Does anyone have any recommendations for workshops in the Sydney basin? I'm not really looking to squeeze every last hp out of it (more is always nice but it's hardly lacking)...it's more a case of not having it so 'fumey' or even just determining whether it is running rich or whether that's just how they are.... It was extensively dyno'd some years back but that was in the context of production cup campaigning so my usage is a little different.