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Home » Public Forums » GMCnet » replacing driver's side head on a 455 (Jumping into unknown waters and any help appreciated)
[GMCnet] Re: replacing driver's side head on a 455 [message #362859 is a reply to message #362857] Tue, 16 March 2021 11:28 Go to previous messageGo to previous message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma:
Senior Member
Yep, you would probably notice a loss in torque and horsepower around 5500
- 6000 rpm or so. 1800 to 3600? Bet you not much difference.
Jim Hupy
Salem, Oregon

On Tue, Mar 16, 2021, 6:57 AM John R. Lebetski
wrote:

> Yep the common 3-5 and 4-6 ports don’t create a clear pulse drive in those
> header tubes, which then causes poor scavenging in 1, 7, 2, and 8.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
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