#1  
Old 09-18-2020, 10:33 AM
Aluminum Chief's Avatar
Aluminum Chief Aluminum Chief is offline
Senior Chief
 
Join Date: May 2006
Location: New York/ New Jersey
Posts: 250
Default 303 Ram V

Anyone ever see this???

Getting ready to assemble the short block and noticed this oil restrictor.

This pic is the upper saddle of #1 main bearing and the restrictor is threaded into the oil passage that goes to the pass side lifter galley.

Thanks KC
Attached Thumbnails
Click image for larger version

Name:	20200918_094551.jpg
Views:	306
Size:	21.9 KB
ID:	549824  

__________________
  #2  
Old 09-18-2020, 10:39 AM
mgarblik mgarblik is offline
Ultimate Warrior
 
Join Date: Mar 2005
Posts: 6,035
Default

I have never seen that but after extensive study of the Pontiac oiling circuit, it makes sense.

  #3  
Old 09-18-2020, 12:01 PM
steve25's Avatar
steve25 steve25 is online now
Ultimate Warrior
 
Join Date: May 2008
Location: Westchester NY
Posts: 14,630
Default

I am not understanding that as according to my oil flow schematic I made a number of years ago the number 1 main hole in the block only feeds the number 2 rod Bearing and the number 1 Cam journal, am I wrong ?

If I am wrong then how are the driver's side lifters going to be restricted restricted other then in each lifter Bore?
Attached Thumbnails
Click image for larger version

Name:	IMG_0149.jpg
Views:	128
Size:	29.8 KB
ID:	549833  

__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!

Last edited by steve25; 09-18-2020 at 12:08 PM.
  #4  
Old 09-18-2020, 12:12 PM
PAUL K's Avatar
PAUL K PAUL K is offline
Ultimate Warrior
 
Join Date: Feb 2004
Location: Sugar Grove IL USA
Posts: 6,280
Default

It will keep more oil to the bottom and less oil to the lifters on one side of the engine... High RPM road race conditions leave it in, street type deal or drag race I would remove it... JMO

__________________
Go fast, see Elvis!
www.facebook.com/PaulKnippensMuscleMotors
The Following User Says Thank You to PAUL K For This Useful Post:
  #5  
Old 09-18-2020, 01:17 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 20,541
Default

Jeff Suchma here in Houston had a RAV block that had restrictors in all the cam bearing feed lines when he got it. I don't remember the history on that block.

Jeff at one time had a clone of the Gay Pontiac funny car but I never heard he completed it.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #6  
Old 09-18-2020, 01:21 PM
PAUL K's Avatar
PAUL K PAUL K is offline
Ultimate Warrior
 
Join Date: Feb 2004
Location: Sugar Grove IL USA
Posts: 6,280
Default

Quote:
Originally Posted by Skip Fix View Post
Jeff Suchma here in Houston had a RAV block that had restrictors in all the cam bearing feed lines when he got it. I don't remember the history on that block.

Jeff at one time had a clone of the Gay Pontiac funny car but I never heard he completed it.
A local guy here restricted all five cam bearings using a hole in the restrictor larger than the hole in the cam bearings.

__________________
Go fast, see Elvis!
www.facebook.com/PaulKnippensMuscleMotors
  #7  
Old 09-18-2020, 01:34 PM
slowbird's Avatar
slowbird slowbird is offline
Ultimate Warrior
 
Join Date: Jan 2001
Location: Montgomery, IL
Posts: 10,638
Default

Quote:
Originally Posted by PAUL K View Post
A local guy here restricted all five cam bearings using a hole in the restrictor larger than the hole in the cam bearings.
How does that make sense?

  #8  
Old 09-18-2020, 02:09 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 20,541
Default

I want to think I saw an article on a Mondello Olds build and their passages were similar and he used a restrictor there.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #9  
Old 09-18-2020, 04:18 PM
455-4+1's Avatar
455-4+1 455-4+1 is offline
Ultimate Warrior
 
Join Date: Apr 2002
Location: New Zealand
Posts: 1,353
Default

Did not realise the factory (or other builders) did this.
We did the same on our 408 jetsprint engine for sustained WOT 6.5k rpm usage.
Restricted at this crossover galley, and redrilled / clocked cam bearings.
All our oil pressure was logged at the No1 main via a tube out the front of the block, not at the rear.

__________________
Working on going faster (and now staying dry at the same time !!)
  #10  
Old 09-18-2020, 05:02 PM
Aluminum Chief's Avatar
Aluminum Chief Aluminum Chief is offline
Senior Chief
 
Join Date: May 2006
Location: New York/ New Jersey
Posts: 250
Default 303

This block was supposedly owned by Buck Baker when he ran a 69 Firebird in Trans Am Racing which would explain the restrictor.

Paul K , I was thinking the same thing, remove it for street driving.

Thanks for the replies.
KC

__________________
The Following User Says Thank You to Aluminum Chief For This Useful Post:
  #11  
Old 09-18-2020, 05:09 PM
PAUL K's Avatar
PAUL K PAUL K is offline
Ultimate Warrior
 
Join Date: Feb 2004
Location: Sugar Grove IL USA
Posts: 6,280
Default

Quote:
Originally Posted by slowbird View Post
How does that make sense?
It doesn't that's what makes it funny!

__________________
Go fast, see Elvis!
www.facebook.com/PaulKnippensMuscleMotors
  #12  
Old 09-18-2020, 05:10 PM
PAUL K's Avatar
PAUL K PAUL K is offline
Ultimate Warrior
 
Join Date: Feb 2004
Location: Sugar Grove IL USA
Posts: 6,280
Default

Quote:
Originally Posted by Aluminum Chief View Post
This block was supposedly owned by Buck Baker when he ran a 69 Firebird in Trans Am Racing which would explain the restrictor.

Paul K , I was thinking the same thing, remove it for street driving.

Thanks for the replies.
KC
I like that old school race stuff. Years ago I bought some RAIV heads and block that was owned by Tiny Lund.

Good luck with the project!

__________________
Go fast, see Elvis!
www.facebook.com/PaulKnippensMuscleMotors
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 05:40 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