$350 ported 5mm stroker engine - Port specs added- please give advice

davidescu_radu

sea riders
i have a plus 5mm crank, short stock rods - 125mm and 62t cylinders bored to 84.75 mm prox pistons - and don't know how to make a good engine from it? I can cut domes on ada head - no problem. But 62T cylinders have ex port higher then 61x so maybe i should deck it a little? where can i ask?
 

tntsuperjet

Tntperformance-engineering.com
Location
Georgetown ca
That really looks like one of my old engines.
5mm rad crank with stock rods, head dome shape is def one that I cut.
Motor should be setup with a .040 base gasket and 190psi comp.
.045 squish,
They typically made 106-114hp at 6950-7030 rpm with my stroker chamber on them.
Taper bore 46's is what we ran back in day on them or MRD 46mm FI
They don't like a lot of timing advance with that rod angle. TL typically setup at 30-32 max timing
Most where 28 for race.
Solas K prop with stock 144 pump in square nose no pump stuffer they run 54-56mph
 

tntsuperjet

Tntperformance-engineering.com
Location
Georgetown ca
i have a plus 5mm crank, short stock rods - 125mm and 62t cylinders bored to 84.75 mm prox pistons - and don't know how to make a good engine from it? I can cut domes on ada head - no problem. But 62T cylinders have ex port higher then 61x so maybe i should deck it a little? where can i ask?
No need to deck cyl.
Just raise trans to128-129 deg she rip
 
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