Here for your air cooling kits Ø46mm (AIRSAL, PARMAKIT, POLINI...) a polygonal-type asshole MVT S-RACE. This very specific ass has more surface and a specific architecture for cooling! Its room is 0.5mm inward to protect and make firewall at the bottom of the bottom joint! So you have to put it on a well-fashioned cylinder. You can also put it on the aluminium ass joint so desired, but be careful, put the good in front, if you tighten the room not well in front of the cylinder, you risk sailing the ass!!!
The fact that the room is a little incoming is very interesting, it can allow you on some clay cylinders the 1mm embalming by keeping a correct squish, so to trace your diagrams with a correct squish!
The ass is delivered with its brown cutter joint.
The combustion chamber gives a beautiful squish area, it is suitable for rather low calottes like the MVT, so has not too bombed pistons. Basically, it gives a relatively high compression rate (theoretical rate around 13:1, we will update this data after other measurements on different cylinders making an average)!!! It will therefore be adapted to large diagram engines (Japanese to calculate):
