What intake is this ?

crackedback said

The big port/small port thing is one of the most overblown fallacies to performance in the mopar SB world.

Guys like to recommend the Weiand Stealth intake... those are some small ports on that intake. Doesn't seem to stop the recs for that intake on a 340-360 engines/heads.

Action plus as well. dinky arse ports.

Click to expand...

You can always port match the smaller port intakes to the larger port heads. The Action Plus and Stealth are good intakes. Wiand and Offy have less core shift in their intakes that I have seen than the other manufacturers.


If you are trying to squeeze every last HP from your engine, it's best to match the ports. If you have studied fluid dynamics, any sudden expansion or contraction in flow causes you to loose flow energy and reduces your flow. It may not be that much difference, but it's good to do if possible when trying to squeeze out every horsepower that you can.

If you have a small port intake going into a larger port head, your velocity will slow down because of the extra area. The extra area will reduce the velocity of the flow. VELOCITY = TORQUE.