What manifold to use?
When injecting into the throttle body (e.g. our types TB, TH, TF, TA, Direct-to-head and SF, SS or ST//1), most of the mixing occurs within the manifold section. It is therefore important that the manifold is suitably proportioned to evenly accelerate gas speed and thus help fuel mixing and distribution. The straighter the run in to the ports the better. A manifold which curves in the same direction as the valve throats is preferred to one which causes the flow to pass through an “S” bend.
