Drag Racing 1/4 Mile times 0-60 Dyno Fast Cars Muscle Cars

CYLINDER SQUISH BAND CLEARANCE CHECK

A proper squish clearance can give your motor 10% more power. Most aftermarket cylinder kits are not made to this close tolerance of 0.6-0.8mm proper piston clearance. We check the squish band clearance and usually have to close the gap from .18 -.13mm down to .8mm gap for proper squish band function to work properly.


 


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DIO MONSTER RACING PISTON PROBLEMS
54MM piston is too tall and will hit crankshaft. The skirts must be shaved to supply clearance for full piston/crank rotation.





(3)- Mating the 54mm cylinder to Stroker Crank
This is the tricky part of compressing both rings while trying to manouver a 4 kilo iron cylinder above them. It does not help with my slightly stiff, 50 year old hands. It should be a snap for you young guys. RH





OPENING THE INTAKE PORTS BY 10%
I am enlarging the aluminum crankase intake ports by 10% to see if it will increase performance at FULL POWER.





TWO-STROKE REED VALVE EXPLAINED
The reed valve is very important for a high perfomance DIO engine. It must work correctly at idle and at 10,000 rpms. The valve material is of great concern when building these engines.





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