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If you try an add very short runners with each cylinder having TB, this tends to opimize high rpm usage . If for example to modified a vehicle that has single TB with one plenum and long runners you will lose a lot of low end torque and throttle will be extremely sensitive . only way around will be extremely small TB .
If you look at that BMW engine ain link above its optimized for high rpm use, look at were peak HP is , this is a short stroke engine . So the engine needs to be engineered as a whole not as parts .
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