- Jun 1, 2016
- Reaction score
- Popcorn stand
Was he only seeing 130 CFM once bolted to the head.Nope.
It’s something I do when I’m flow testing an intake manifold........ but most times I don’t see anyone doing it.
I have tested it both ways, and it doesn’t always make a difference, but my guess is on an intake that’s knocking the flow of the head down 80-90cfm, it would probably help.
At head 221cfm with a 1.78 valve ,the 4 brl 273 intake knocked it to 148-152 depending on intake runner with clay radius around each 4 holes.
They are power killing intake manifolds.
Chrysler knew that along with being cheap that's why they just threw the 360 manifold onto the later 4brl 318s...they knew the old ones were crapola.