Crossovers for 351 vs 302

[Guest]

My understanding is that the original idea behind the crossover exhausts for the 289/302 was to create a vortex in the collectors to assist in scavenging exhaust gases out of the headers. The 351W has a different firing order to the 289/302 so, if the 351 headers are built the same as for a 302 the vortex would actually be in the reverse direction (i.e. clockwise rather then counter-clockwise). To my mind this should make no difference, but, as there are a number of people out there running 351's does anyone have any thoughts on this? Did anyone build their 351 headers differently to reproduce the original counter-clockwise vortex? Just interested as I am building a 351 for my car.

Brian.

 

Hi Brian

I installed an Edelbrock Street Performer cam
you then end up with the 302 firing order.

Regards
Chris

[ April 27, 2002: Message edited by: Chris Melia ]

 

[Bob Putnam]

The direction of the swirl is irrelevant unless the car is standing on its nose. (And that's dependant on whether the car is north or south of the equator.

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