Exhaust Manifold Balance pipe/Carb Heater

[tug 55]

I wonder if anybody can enlighten me as to the reason  or  reasons as to why the balance  pipe is discarded in club class race engines.
Cheers
Ron

[Paul]

It heats the inlet and therefore the mixture. Also stops a 2 into 1 exhaust working at tuned length.

[tug 55]

Hi Paul. Thanks for information.  Exhaust tuning seems to be something of a black art unless you know what you are doing 
Ron

[Alec Graham]

so is playing the unicycle.

[gadget]

that's where you are going wrong Alec
we usually ride ours!