pilottx

Hi Ante The boost is relatively low, 8psi at 6600rpm, dont forget because the supercharger is engine driven the the boost rises in a linear fashion, it's not like sudden rush of a turbo. I don't think the reaction time is going to be too much of an issue. The ecu provides a tacho output for the instrument cluster, this is the output I was thinking of using. I've got a really basic handheld scope, do you need some scope info? Pilottx

The RPM switch is not for nitrous, it's to put a form of electrical control to a dump valve. The engine has had a retro supercharger fitted. Engine is a 6 cylinder by the way, the ecu output is digital. The problem i'm having is that at low speed the high vacuum created by the engine is opening the dump valve, the turbulent air passing through the valve is blowing back onto the airflow meter creating very jerky driving at this speed, ie: fuel mixture is being badly affected. Stonger springs in the valve help but create a problem further up the rev range where the boost cannot be dumped fast enough. The idea is to stop the dump valve working upto 3000rpm (if this was adjustable via a pot then even better) then have the electronic controller switch to allow airflow, this switch would control some other form of inline electric valve which would open to allow the dump valve to work in the normal way. The electronic switching unit would only need to provide enough output to trigger a relay as this would probably be simpler. I'm really looking for one of you good chaps to be able to provide a schematic and component list as I am not electronic savvy at all really, although adept in vehicle electrical/mechanical. Thanks in advance for any info or help Pilottx

Hi all Hope this is the right place to ask this type of question?? I'm looking for simple schematic so I can build a simple switching device based upon an engines rpm speed. The rpm signal will be provided by the vehicles ECU. The purpose would be to control some form of air valve which would be closed upto 3000 rpm ish then open thereafter. If anyone can offer any help it would really be appreciated.. Thanks Pilottx