Home Menu

Menu


Pontiac - Race The next Level

          
PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Race > Edelbrock heads
Reply
Page 2 of 2 1 2
 
Thread Tools Display Modes
  #21  
Old 11-16-2020, 12:00 AM
Stan Weiss's Avatar
Stan Weiss Stan Weiss is offline
Ultimate Warrior
  
Join Date: Jul 2013
Location: Philadelphia, PA
Posts: 5,024
Default
Quote:
Originally Posted by chiefbigb View Post
I recently put 1.77 exhaust valves in a set. Did before and after flow test. Picked up 20 cfm on the exhaust side.
Did you just put a bigger exhaust valve in or also enlarge the throat and bowl?

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
  #22  
Old 11-16-2020, 08:06 AM
chiefbigb chiefbigb is offline
Ultimate Warrior
  
Join Date: Dec 2003
Location: richmond va usa
Posts: 1,487
Default
Just blended the larger area into the bowl. I ported the heads with the smaller valves years ago.

__________________
Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow.
Reply With QuoteReply With Quote
  #23  
Old 11-16-2020, 09:56 AM
Mike Davis's Avatar
Mike Davis Mike Davis is offline
Ultimate Warrior
  
Join Date: Jun 2000
Location: Athens Ga, or at a NMCA race
Posts: 1,994
Default
Quote:
Originally Posted by BLANK1 View Post
Mike,
Are you running a 3 inch or 3 1/2 inch exhaust?
3 1/2 Stainless, Mandrel bent with X Pipe.
Car runs the same with exhaust as without.

__________________
66 GTO Nostalgia Super Stock/Street Legal Car
421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99
Multiple NSCA/NMCA World Champion

66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
Reply With QuoteReply With Quote
  #24  
Old 11-16-2020, 11:43 AM
slowbird's Avatar
slowbird slowbird is online now
Ultimate Warrior
  
Join Date: Jan 2001
Location: Montgomery, IL
Posts: 10,650
Default
Quote:
Originally Posted by Mike Davis View Post
3 1/2 Stainless, Mandrel bent with X Pipe.
Car runs the same with exhaust as without.
You have it made or is it a kit? If kit what brand?

Reply With QuoteReply With Quote
  #25  
Old 11-16-2020, 12:04 PM
Mike Davis's Avatar
Mike Davis Mike Davis is offline
Ultimate Warrior
  
Join Date: Jun 2000
Location: Athens Ga, or at a NMCA race
Posts: 1,994
Default
Quote:
Originally Posted by slowbird View Post
You have it made or is it a kit? If kit what brand?
I bought the X pipe kit from Pypes, Mufflers are round Ultra flow welded.

https://www.summitracing.com/parts/pye-xva14


https://www.summitracing.com/parts/wlk-17224

__________________
66 GTO Nostalgia Super Stock/Street Legal Car
421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99
Multiple NSCA/NMCA World Champion

66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
Reply With QuoteReply With Quote
  #26  
Old 11-16-2020, 02:13 PM
grandville455's Avatar
grandville455 grandville455 is offline
Ultimate Warrior
  
Join Date: Jan 2003
Location: Chippewa Falls,WI 54729
Posts: 10,838
Default
Quote:
Originally Posted by Mike Davis View Post
3 1/2 Stainless, Mandrel bent with X Pipe.
Car runs the same with exhaust as without.
Mike Did u run it with 3" before or no?

__________________
Darby
74 Grandville 2Dr 455 c.i 4550#
2011 1.60 60 ft,7.33@94.55-11.502@117.74


2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32
M/T 275/60 ET SS Drag Radial

2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's
Reply With QuoteReply With Quote
  #27  
Old 11-16-2020, 06:53 PM
Mike Davis's Avatar
Mike Davis Mike Davis is offline
Ultimate Warrior
  
Join Date: Jun 2000
Location: Athens Ga, or at a NMCA race
Posts: 1,994
Default
Quote:
Originally Posted by grandville455 View Post
Mike Did u run it with 3" before or no?
Not with the current combo.

__________________
66 GTO Nostalgia Super Stock/Street Legal Car
421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99
Multiple NSCA/NMCA World Champion

66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
Reply With QuoteReply With Quote
Reply
Page 2 of 2 1 2

« Previous Thread | Next Thread »
Thread Tools
Display Modes
Linear Mode Linear 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 10:05 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