yury Posted September 30, 2019 Report Share Posted September 30, 2019 Hi All, sorry for noob question, how ECU will work if environment voltage is greater than 22V? Any kind of protection? Thanks Quote Link to comment Share on other sites More sharing options...
cj Posted September 30, 2019 Report Share Posted September 30, 2019 You will have quite a few problems. Can you describe why you have to run at 22V? Is this the battery/cranking/alternator voltage? The ECU itself is generally set to shut down above 18 for protection reasons. I'm not sure how high you can push it before you break something however. Your injector dead times are likely not rated at 22+V. Most dead time tables top out about 16-18V Your coil dwell times are also not likely published at 22+V, again most manufacturers only provide numbers up to 16-18V. Is this a 24v vehicle? can you split the system so you only power the ECU & engine systems from a single 12 battery? Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 1, 2019 Report Share Posted October 1, 2019 The official quoted maximum operating voltage is 22V, this is intended to give a bit of headroom on the common drag racing 16V systems. I wouldnt recommend exceeding 22V. Quote Link to comment Share on other sites More sharing options...
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