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Re: replacing driver's side head on a 455 [message #362857 is a reply to message #362723]

Tue, 16 March 2021 08:55

JohnL455

Messages: 4447
Registered: October 2006
Location: Woodstock, IL

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Senior Member

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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[Message index]

		replacing driver's side head on a 455 By: rgogan on Mon, 08 March 2021 14:46
		Re: [GMCnet] replacing driver's side head on a 455 By: stu@97381.com, Emery on Mon, 08 March 2021 14:55
		Re: replacing driver's side head on a 455 By: Matt Colie on Mon, 08 March 2021 16:26
		Re: replacing driver's side head on a 455 By: Matt Colie on Mon, 22 March 2021 13:50
		Re: replacing driver's side head on a 455 By: rgogan on Thu, 24 June 2021 10:05
		[GMCnet] Re: replacing driver's side head on a 455 By: jimk on Thu, 24 June 2021 10:38
		Re: replacing driver's side head on a 455 By: JohnL455 on Mon, 08 March 2021 17:51
		Re: replacing driver's side head on a 455 By: rgogan on Tue, 09 March 2021 10:02
		Re: [GMCnet] replacing driver's side head on a 455 By: James Hupy on Tue, 09 March 2021 11:16
		Re: replacing driver's side head on a 455 By: rgogan on Mon, 15 March 2021 12:48
		Re: replacing driver's side head on a 455 By: Ken Burton on Tue, 16 March 2021 03:39
		Re: replacing driver's side head on a 455 By: JohnL455 on Tue, 16 March 2021 08:55
		[GMCnet] Re: replacing driver's side head on a 455 By: James Hupy on Tue, 16 March 2021 11:28
		[GMCnet] Re: replacing driver's side head on a 455 By: Ken Henderson on Tue, 16 March 2021 11:40
		Re: [GMCnet] Re: replacing driver's side head on a 455 By: rgogan on Sun, 21 March 2021 19:46
		Re: replacing driver's side head on a 455 By: jhbridges on Mon, 22 March 2021 11:03
		Re: replacing driver's side head on a 455 By: Matt Colie on Mon, 22 March 2021 13:47
		Re: replacing driver's side head on a 455 By: rgogan on Mon, 22 March 2021 18:30
		[GMCnet] Re: replacing driver's side head on a 455 By: stu@97381.com, Emery on Mon, 22 March 2021 21:16
		[GMCnet] Re: replacing driver's side head on a 455 By: stu@97381.com, Emery on Mon, 22 March 2021 21:25

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