Carbon free REW13B
#4
Rotary Enthusiast
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#11
Disable EGR, evaporative/crankcase emissions and run a good premix.
I run 50:1 ratio (No, doesn't smoke) Quicksilver premix and Lucas Top End Lube/Injector Cleaner instead of premix every once in a while to keep the injector tips clear.
If you keep the stock oil injection (as I did) keep the engine oil very clean.
Very clean engine inside, even the exhaust ports will be carbon free if you port to positive relief. Just a dusting of carbon on exhaust port sleeves, turbo/manifold.
This is important for best performance and reliability as it eliminates carbon build up in apex seal groove and subsequent sticking of apex seal as it crosses the minor axis which leads to early ignition of the charge in the compression phase.
Mazda found high rpm horsepower gains from eliminating this apex seal sticking in the Lemans car by using specially formulated clean burning Idemitsu premix.
I run 50:1 ratio (No, doesn't smoke) Quicksilver premix and Lucas Top End Lube/Injector Cleaner instead of premix every once in a while to keep the injector tips clear.
If you keep the stock oil injection (as I did) keep the engine oil very clean.
Very clean engine inside, even the exhaust ports will be carbon free if you port to positive relief. Just a dusting of carbon on exhaust port sleeves, turbo/manifold.
This is important for best performance and reliability as it eliminates carbon build up in apex seal groove and subsequent sticking of apex seal as it crosses the minor axis which leads to early ignition of the charge in the compression phase.
Mazda found high rpm horsepower gains from eliminating this apex seal sticking in the Lemans car by using specially formulated clean burning Idemitsu premix.