we just overhauld a 914 engine and when we rich at 4800 RPM we got a turbo lag for riching 5500 RPM and it takes about 3 to 5 seconds and only reaches 5100 to 5200 RPM, so what shall we do i need your help guys ty so much
by Joaquim Fonseca » 5 weeks ago
1- Check the engine running with TLR (airbox temp, servo position, airbox pressure vs target, fuel pressure, etc)
2- Check if there are no leaks in the big hoses (if you have intercooler, from Turbo and to airbox; from airbox to carburators) and the small ones connected to the airbox
3- Check wastegate free movement
by arsham » 5 weeks ago
i have checked all before
by Rotax Wizard » 5 weeks ago
Joaquim
The turbo works on exhaust pressure. Any lag suggests a communications error or problem with the set up of the cable and setpoints. Be sure that your vent/map hoses are all new (should have replaced at overhaul) What MAP pressure do you have at 100% and 115% settings?
Cheers
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