Throttle body stacks … Air flow and performance

[eight-six]

The basics from what I understand are … the longer the stack the more mid range and torque, and a shorter stack means more top end and power.

However are there any thoughts around how much air space you have in front of the stacks? Does it matter?

If I had some long stacks fitted to a set of throttle bodies and the end of the stacks was close to a bulk head etc would that be an issue, will it affect performance etc? Were talking maybe 2 / 3 fingers width close.


On another subject what can be done to improve air flow into the stacks? From what I have seen a flat plate mounted behind the radius edges of the stacks is recommended. Obviously some form of cool air feed would also be helpful. Any other pointers? The stacks will be run open so no filter considerations to worry about.

Cheers

James