#121  
Old 02-02-2023, 07:18 PM
Douglas Willinger's Avatar
Douglas Willinger Douglas Willinger is offline
Senior Member
 
Join Date: Dec 2017
Location: Rocky Mount, North Carolina
Posts: 178
Default

Or how about the prototype smaller chamber SD455 heads with the 96 casting.

__________________
1970 Lucerne Blue Firebird Trans Am, deluxe blue interior. Original Ram Air III, M-21, 3.73. Being built as a 4" stroke "434" with SR 614 Ram Air IV heads

1972+ Lucerne Blue 4-door hardtop "what if" T-41 Le Mans Sport GT/Grand Am concepts. Equipped with future 3" journal "455 HO"/"what if" prototype "SD 455".
What if GM had continued production of the 1970-72 GM A body somewhere in the southern hemisphere?
  #122  
Old 02-02-2023, 07:28 PM
grandam1979 grandam1979 is offline
Ultimate Warrior
 
Join Date: Feb 2005
Location: Ohio, Findlay
Posts: 1,428
Default

My buddy had a aluminum 400 block I would love to have gotten it but it sold for some big money. And I’d be scared to use it to rare to worry about hurting it. But that block with some aluminum ram air heads how cool would that be?

  #123  
Old 02-03-2023, 02:22 AM
Dragncar Dragncar is offline
Ultimate Warrior
 
Join Date: Mar 2004
Location: Humbolt County California
Posts: 8,283
Default

Quote:
Originally Posted by Half-Inch Stud View Post
Doesn't cutting back the sparkplug's GND lug make angled plugs moot?

Iron Roundport manifolds with good flow seems needed, and then them roundport heard with outofdabox 280+ CFM.
I do not think so. Ideally you want the spark plug pointed at the exhaust valve, not the intake.
I believe it helps get a cleaner intake charge when the piston starts the intake stroke.

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:55 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017