Read the ensuing posts...all good info. Hornet driver is right on re the pump testing...though it is new...but that voltage at max seems 15-20% high for a broken in pump (shouldn't be caving that UAT, either!) If max RPM for an SP is 117, and you are not making it, but still seeing 'Max RPM Set' on your EDT, then the ECU max RPM (ECU parameter 'M') has been factory set incorrectly. If you never see 'Max RPM Set, then that is another problem...but, regardless, max RPM will not affect spool-up times (and I now assume it is not the first calibration run to max RPM you are talking about?). Spool-up is another ECU parameter (TLT, which might be 017 for your engine) and that may have been set conservatively, too.

Take it out of the model, put it on a free-air test stand, use a single large tank w/ a Festo filter in the pump intake line. By now (and if you have run in the pump for 20-25 minutes before any installation- a good idea to eliminate any possible pump-source contamination-) then the pump can be run w/ a direct line to the engine. (Matter of philosophy here...that's the way I've run all my engines for years. It eliminates any after-pump added connection leaks and any possible pressure-side restriction.). Good spool-up, Max RPM set at 117K tells you the engine is fine...it's yer on-board fuel system that is defficient.

Finally, and candidly, AMT may have installed bearings in your engine that were from a 'bad' batch.....and all this in the middle of sale to new owners at a new location. The new factory in Cincy is now open for business and you should first (before any more engine runs) call John or Norm (513-769-4539), tell them your S/N, and determine whether your 280 needs to be looked at. Questionable bearings, you will return the engine. Good bearings, try the test stand; check the ECU parameters if you have the software. If still no joy re spool up (about 4-seconds) and/or 117K, yer gonna have to send the ECU back to AMT to verify the parameters.

Unfortunatley, all at a bad time....the middle of flying season! Patience is needed at the moment....I have every faith AMT USA will be a more respondant, better organization w/ 21st century engines in the very near future. Get back to me w/ a PM ([email protected] or call at 508-457-2325) if you wanna converse directly.

Ray
AMT USA Field Rep