Benjamin Posted June 16, 2015 Report Share Posted June 16, 2015 (edited) Does anyone remember the 1981 Orion I 01.504 demonstrator bus that was purchased June 17, 1983 by the Quality Inn (or "The High Q") of Orlando, FL? Because it was built in 1981 it would have had a Detroit Diesel 6V53N engine, but once it set foot here in FL it had to be changed to the 6V53T engine. Or, with modifications to the rear compartment, it could have had the 6V92TA engine. ~Ben Edited June 16, 2015 by Benjamin Link to comment Share on other sites More sharing options...
Detroit Diesel 6V92TA Posted June 17, 2015 Report Share Posted June 17, 2015 Because it was built in 1981 it would have had a Detroit Diesel 6V53N engine, but once it set foot here in FL it had to be changed to the 6V53T engine. Or, with modifications to the rear compartment, it could have had the 6V92TA engine. ~Ben So 6V53N to 6V53T or 6V92TA. Was the Allison a MT-643 or 644? Link to comment Share on other sites More sharing options...
Benjamin Posted June 17, 2015 Author Report Share Posted June 17, 2015 So 6V53N to 6V53T or 6V92TA. Was the Allison a MT-643 or 644? MT643, so to MT644, HT740 or HT747. ~Ben Link to comment Share on other sites More sharing options...
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