Remove the Butterflies on an Emmisions Manifold?

[singerv]

Thought this fit well in another question but apparently not. I have a US exhaust emission control layout. I have been advised to remove the butterflies in the manifold as this is a cause of many starting and idling issues/problems and to epoxy the holes shut. Ok, but then do I "have to" blank the crossover tubes or can I leave them? What is the expected effect of doing each? I was going to epoxy the holes where the brass rod is removed, but another option seems to be just remove the butterfly plates and leave the rod, may actually help with atomization or may give it someplace to crash into and slow not sure which! The manifold has a top and bottom channel, with the butterfly in place any flow would be channeled by the plate, without the plate the flow from the top and bottom would meet, anyone see this as an issue or is the intake of such a magnitude that it really doesn't matter? Section L page 47 of the manual give a pretty good description and function but not really sure what the result will be if removed and just left open.


thanks,

Vince

[elj221c]

Any help?

fuel-system-carbs-f40/thinking-removing-secondary-throttle-assembly-t26914.html

Lots of info there though I can't remember for sure if your specific question is answered.