15/15 fuel. Tower muffler and no headshims

APC 12-4= 14100 rpm
APC 11-7= 12900 rpm

New test, JBA .56F, this time with the red Jettmuffler, 15/15 fuel.

APC 11-7 did 13400 rpm

APC 11-6 did 14400 rpm

APC 10-6 did 15450 rpm

APC 12-4 did 14900 rpm

I did a comparison test with my modded ASP .52 XLS on the same props, same muffler, same fuel, same day of testing and even the plug from the JBA.

APC 11-7 did 14000 rpm

APC 11-6 did 14700 rpm

APC 10-6 did 16000 rpm

APC 12-4 did 15200 rpm

I actually hoped that the JBA had won this contest, but it can be modded some more too

Maybe some glowplug tryings may give a chance.

Yeah, so far I have only ran one plug, not even sure what it is

I will also run some 30% nitro and see what happends.

The JBA is still fairly new and might run even stronger after a gallon or two more, the ASP is well broken in

More props on the JBA .56F, fitted with the red Jettmuffler and OS hyper 50 head.
Fuel 15/15

APC 9-8 16700 rpm
APC 8.75-7.5 18700 rpm
APC 8.75-8 18400 rpm