98 5.7 vortec 1 7/8 crimped - hurting power?

Jrgunn5150 said:

I thought the 3" was better everywhere on that engine except the extreme low end of the graph, and if I remember right, the difference wasn't even enough to matter anyway on that big block

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Jrgunn5150 said:

That's my only point, I've never believed pipe diameter makes a lack of difference on 99% of engines out there. There are so many other places for improvement, like the crap manifolds lol.

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Justin S said:

its not the diameter of the stock manifolds, its the overall design of how the exhaust exits the head and where it all meets back together.

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slowburb said:

Didn't you just try to state/prove [that dented headers are no different than intact headers? Didn't you just try to state/prove that exhaust pipe diameter is immaterial to power producing potential? How then could cast manifolds be crap?

BTW, the videos proved nothing you asserted.

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Jrgunn5150 said:

No.
No.
There is more than one dimension (diameter you are referring to) to a manifold.

I stated, that for most people, the crimps in that y pipe, are not what's holding them back from greatness and glory, if I haven't been clear.

On a presumably, stockish Vortec 5.7, swapping that Y pipe, with the freeist flowing pipe, of whatever diameter, isn't going to make enough difference to notice, or possibly even measure, if people actually bothered to do such things.

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slowburb said:

The video was about dented headers. Leads me to wonder if the headers were too big for the engine and rpm in the first place.

I (as well as many others) have experienced the opposite of what you state regarding the size and design of the headlpipes.

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