Home Menu

Menu


Pontiac - Street No question too basic here!

          
PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > 48 Heads or Edelbrock Aluminum
Reply
 
Thread Tools Display Modes
  #1  
Old 01-20-2026, 09:41 AM
grivera's Avatar
grivera grivera is offline
Ultimate Warrior
  
Join Date: Feb 2005
Location: Just south of Baltimore
Posts: 5,871
Default
Whichever way you go would be a good idea to cc the 48s - typically come in at 72cc so you have a good idea what your compression ratio is. Any idea what the cam specs are and were you happy with the performance before the blown head gasket? Based on your intended use the 48s should be more than enough…

__________________
Will Rivera

'69 Firebird, 400/461, 290 Eddy D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'69 LeMans Vert, XS 350, #47 heads, TH400, 10 Bolt 3.23 gears, work in progress
‘66 Lemans, 455, 310 KRE D-Ports, HR 236/245, TH400, GV OD, 12 bolt 3.73 gears - see it here:
https://youtu.be/RP_s1wJKm_Y?si=K0NZxoTyaGcj8Dcb
Reply With QuoteReply With Quote
  #2  
Old 01-20-2026, 10:59 AM
sdbob sdbob is offline
Ultimate Warrior
  
Join Date: Aug 2003
Location: Latrobe,Pa. USA
Posts: 2,876
Default
I priced a set of Kauffman aluminum heads from them 2 yrs ago. I thought reasonable what I was getting,New heads ready to bolt on.

Reply With QuoteReply With Quote
  #3  
Old 01-20-2026, 11:28 AM
vamman1's Avatar
vamman1 vamman1 is offline
Chief Ponti-yacker
  
Join Date: Jan 2008
Location: Republic of Newfoundland
Posts: 697
Default
Quote:
Originally Posted by sdbob View Post
I priced a set of Kauffman aluminum heads from them 2 yrs ago. I thought reasonable what I was getting,New heads ready to bolt on.
Looks like the Kaufmann are priced near everyone else now

__________________
Chris
1968 GTO Convert HO
1954 Packard Clipper
2003 Jeep TJ Rubicon
Reply With QuoteReply With Quote
  #4  
Old 01-20-2026, 11:31 AM
vamman1's Avatar
vamman1 vamman1 is offline
Chief Ponti-yacker
  
Join Date: Jan 2008
Location: Republic of Newfoundland
Posts: 697
Default
Quote:
Originally Posted by grivera View Post
Whichever way you go would be a good idea to cc the 48s - typically come in at 72cc so you have a good idea what your compression ratio is. Any idea what the cam specs are and were you happy with the performance before the blown head gasket? Based on your intended use the 48s should be more than enough…
Concerned about fuel octane and always finding 93+, concerned about the heat in traffic and Florida, concerned about current valves and whether worth spending money on the 48s or just mortgaging the Aluminum....

__________________
Chris
1968 GTO Convert HO
1954 Packard Clipper
2003 Jeep TJ Rubicon
Reply With QuoteReply With Quote
  #5  
Old 01-20-2026, 11:33 AM
vamman1's Avatar
vamman1 vamman1 is offline
Chief Ponti-yacker
  
Join Date: Jan 2008
Location: Republic of Newfoundland
Posts: 697
Default
Quote:
Originally Posted by vamman1 View Post
Concerned about fuel octane and always finding 93+, concerned about the heat in traffic and Florida, concerned about current valves and whether worth spending money on the 48s or just mortgaging the Aluminum....
No idea what the current cam is but she hops when I step on it....

FYI my 4 speed Muncie is also toast; gears popping and clutch slipping...
So upgrading to Tremec 5 speed which also $$$ sucks

__________________
Chris
1968 GTO Convert HO
1954 Packard Clipper
2003 Jeep TJ Rubicon
Reply With QuoteReply With Quote
  #6  
Old 01-20-2026, 02:30 PM
Stan Weiss's Avatar
Stan Weiss Stan Weiss is offline
Ultimate Warrior
  
Join Date: Jul 2013
Location: Philadelphia, PA
Posts: 5,339
Default
Quote:
Originally Posted by vamman1 View Post
Concerned about fuel octane and always finding 93+, concerned about the heat in traffic and Florida, concerned about current valves and whether worth spending money on the 48s or just mortgaging the Aluminum....
If you still one head on, then do a cranking compression test on that bank.

Stan

__________________
Stan Weiss/World Wide Enterprises
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software
http://www.magneticlynx.com/DV
Download FREE 14 Trial IOP / Flow Software
http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php
Pontiac Pump Gas List
http://www.magneticlynx.com/carfor/pont_gas.htm
Using PMD Block and Heads List
http://www.magneticlynx.com/carfor/pont_pmd.htm
Reply With QuoteReply With Quote
  #7  
Old 01-20-2026, 03:50 PM
vamman1's Avatar
vamman1 vamman1 is offline
Chief Ponti-yacker
  
Join Date: Jan 2008
Location: Republic of Newfoundland
Posts: 697
Default
Quote:
Originally Posted by Stan Weiss View Post
If you still one head on, then do a cranking compression test on that bank.

Stan
All cylinders tested at 150psi except #1 which was 75....

__________________
Chris
1968 GTO Convert HO
1954 Packard Clipper
2003 Jeep TJ Rubicon
Reply With QuoteReply With Quote
Reply

« Previous Thread | Next Thread »
Thread Tools
Display Modes
Hybrid Mode Hybrid Mode

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 07:51 PM.

 

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.

 




Contact Us Home
Copyright © 2017