Just how bad is the come 304 manifold

[delcowizzid]

Yeah massive difference in power exact same timing table just corrected fueling for the new manifold

[vlad01]

Those plugs also look very similar to the Buick 6 with the factory bellmouth, once it's removed they all come even in appearance and improve performance quite a bit.

Apart from the obvious distribution issues, one of the biggest flaws of the COME manifold is it's extremely short runner, they really kill the power potential. They aren't even in the ballpark for any combo that could make use of them, even a serious race cam with 270 deg adv they are way too short.

[delcowizzid]

The victer junior also has very short and large runners we told him to get a duel plane like one of our other customers has on a stock 304 with small cam it went 220kw but some people don't listen but still a good outcome.
Deuce if you have mixed driving on the plugs you won't notice the mixture variance as much these plugs are purely wot time

[vlad01]

They are long enough, much longer than the COME looking on google images. Thing is, on that style manifold, some of the runners are decently long enough. Even if not all the same length, the ones that are close/er to being ideal will lift the overall hp regardless of the others. Some use this trick on ITBs to get a smoother curve.

[Deuce]

The victer junior also has very short and large runners we told him to get a duel plane like one of our other customers has on a stock 304 with small cam it went 220kw but some people don't listen but still a good outcome.
Deuce if you have mixed driving on the plugs you won't notice the mixture variance as much these plugs are purely wot time

Yes, good point.
I should arrange a place to try mine with a new set and see what they look like afterwards.