Here's the 1977 Peugeot Racey Kit Port Map
Can someone sell me why the bottoms of the transfers sit lower than the exhaust port? Is it so the charge will blow across the edge of the piston or something?
two things i can think of
1- when the piston partially obscures the port it kicks the flow up along the cylinder wall
2- the piston gets more time to make contact with the cylinder wall at BDC which keeps it cooler on the exhaust side and better lubed, you don't spend very much time at the bottom 10% of the port so loss is minimal.
or, its cheap '77 china garbage and they just suck at making things
It's like when water is running at the tap and you finger touches the edge the flow curves,
Helps roil flow across the piston dome.
But that kit is just wacko or more 77 junk, 1mm is all it needs to roll the flow.
It might work good on moby setups that use pug kits.
Think it would be worth while taking 2mm off the top of the cylinder, dropping the exhaust 2mm and adding a 2mm spacer to the base?
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