oil restrictors needed or not - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old Jan 10th, 01, 06:43 PM Thread Starter
 
Join Date: Apr 2000
Posts: 32
Cool

are oil restrictors really needed in small blocks with roller cams, or is this something that can be omitted when building these motors.
buddy c is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old Jan 10th, 01, 08:49 PM
Tech Team
 
Join Date: Aug 2000
Location: Helsinki Finland
Posts: 61
Post

Hello!

Dont use them if you are building street motor,rollercams, especially mechnicals, need sufficient lubrication when driving low engine speeds(idle,etc).Hydraulic rollecams wont work at all with restrictors!!!

Restrictors are mainly used in race-engines witch sees lots of high rpms,so there will not be so much oil in cylinderheads or liftervaley,more in oilpan.

hope this helped,joni
joni is offline  
post #3 of 7 (permalink) Old Jan 11th, 01, 02:22 AM Thread Starter
 
Join Date: Apr 2000
Posts: 32
Cool

this will be a race only engine with a solid roller, any input.
buddy c is offline  
 
post #4 of 7 (permalink) Old Jan 11th, 01, 02:45 AM
 
Join Date: Jan 2001
Location: melbourne Australia
Posts: 10
Post

Buddy C,
I use the ones that screw in the rear oil galleries in my 406, they had a tiny hole (.030" I think) so I drilled them out to .090" to allow a little more oil up top to cool the springs and such really simple to do and no dramas yet.
nitrous nick is offline  
post #5 of 7 (permalink) Old Jan 11th, 01, 02:47 AM
 
Join Date: Jan 2001
Location: melbourne Australia
Posts: 10
Post

oops,
I'm sure that hole isn't .090" any way they were tiny so I made them bigger!

It's late here in OZ.
nitrous nick is offline  
post #6 of 7 (permalink) Old Jan 11th, 01, 08:43 AM
 
Join Date: Nov 2000
Posts: 18
Post

WHAT YOU NEED TO DO BEFORE RESTRICTING AIRFLOW IS DECIDE WHAT YOU WANT TO DO IF IT IS A STREET/ENDURANCE RACE CAR RUN IT TO SEE IF OIL PUKES OUT THE BREATHER IF IT DOESN'T YOUR FINE. IF IT DOES YOU NEED RESTRICTORS. 1/4 MILE CARS DO NOT NEED RESTRICTORS BECAUSE IT IS SUCH A SHORT DISTANCE IT WOULD BE POINTLESS TO RESTRICT OIL FLOW. INSTEAD OF USING RESTRICTORS I WOULD JUST USE A STANDARD VOLUME OIL PUMP AND MAKE SURE YOUR CLEARANCES ARE WITHIN TOLERANCE LEVELS AND YOU SHOULD BE FINE. YOU NEVER WANT TO RESTRICT OIL UP TO THE SPRINGS IN A ROAD RACING ENGINE BECAUSE THIS IS ONE OF THE HOTTEST PARTS OF THE ENGINE. WHAT ELSE COOLS DOWN THE FRICTION?
0073735963 is offline  
post #7 of 7 (permalink) Old Jan 13th, 01, 03:41 PM
Team Member
John
 
JohnZ's Avatar
 
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Post

Sidebar to the above post - Ferrari engines have been designed since day one with the exhaust valves and at least half of the spring height totally submerged in oil at all times to carry off the heat; that's why old Ferraris with worn valve guides smoke so badly! Even today, they run normal oil pressure of 85-90 psi hot through 18mm (3/4") lines - that's quite a flow rate. Ferrari has always used the oil system as part of the engine cooling system, as nothing else can cool the stems and springs.

------------------
JohnZ
'69 Z28 Fathom Green
JohnZ is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome