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Oddjob:
Weirdly the length is critical, too long and they protrude into the air/fuel flow to the cylinder, this can cause turbulence and affect the way it fires. One of the tricks Mark Paris (Hondaman) advises is to trim the screws until they are flush with the manifold. The 500/550 suffer with this problem.
Saved my first post for you Ted, my comeback champion :) :)
McCabe-Thiele (Ted):
You have been missed Ken, welcome back.
PS obviously if too long it would mess up the air flow, not sure if too short would create a venturi vacuum, thus turbulence.!,😁😁😁
Sesman:
Welcome back, Ken. You have been missed.😉
Oddjob:
I fit them, see if they protrude, trim them and then use a Dremel to shape them to the airflow, on the 500/550 I use those discs to smooth out the extremely rough interior of the inlet manifold to aid a smooth air flow, not too smooth, you want a very small amount of turbulence to assist the mixing of the air/fuel. The faster you can get the fuel to the cylinder the more power the engine makes, it’s only a few bhp but they all add up.
Cheers Phil and all those who messaged me.
K2-K6:
Welcome back to the forum Ken, your knowledge and contribution is valuable to the others on here.
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