door Bruno » do okt 27, 2005 12:49 am
De doorstroming verandert aanzienlijk. Ik kan er verder ook niet echt een verklaring voor geven, maar men merkte hetzelfde op in Engeland bij Dave Livingstone zijn wagen. Ik citeer Rob Bell even :
"I haven't seen Bruno's A:F ratio, so it is a little hard to comment with any confidence, but yes, when you improve breathing, be that via the inlet or through the exhaust, you are altering the parameters under which MEMS was originally mapped. In closed-loop (ie under constant throttle situations), the system is completely adaptive. Under open-loop conditions (full throttle), you are completely reliant upon the ignition and fuelling maps programmed in MEMS.
Therefore, to find that your engine tends to run lean when you've largely optimised the inlet and exhaust systems is not entirely surprising. Dave Livingstone found similar when DVA ported his cylinder head. He - and a few others who've had similar work performed - have had to fit FSE fuel pressure valves which has enabled optimisation of the fuelling.
It is possible Bruno, that you will need to do the same. The alternative is to replace MEMS2J with either the later mappable MEMS3 or an aftermarket ECU, such as the Emerald (which can control the VVC). BUT this is a very expensive solution."
MG's :
- VOLCANO MGF '180' VVC / - BRGMGTF135
Non-MG's :
- Mercedes CLA AMG line shooting break / - Mercedes Vito 113 CDI
Racecars :
- YELLOW MG ZR 190 / - WHITE MG ZR 190 VHPD Official cupracer / - YELLOW Rover114 Official cupracer EVO "Ex Cor Euser"/ - WHITE Rover 114 Official cupracer