AMC V8 oil pump gear modification (Hydro relief) - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Jeep - Hardcore Tech
Notices

Reply
 
Share LinkBack Thread Tools Display Modes
Old 10-04-2006, 11:46 PM   #1 (permalink)
MC
Nose to grindstone
 
MC's Avatar
 
Join Date: Aug 2003
Member # 21997
Location: Sweat equity - We live it
Posts: 8,180
Blog Entries: 1
Send a message via Yahoo to MC
AMC V8 oil pump gear modification (Hydro relief)

This is our "HRC" idler gear


This gear is equipped with hydro relief channels (HRC)

As you can see in pic 1 you will notice the small grooves in the idler oil pump gear. In pic 1 shows the beginning of the normal AMC oil pump rotation. AMC oil pumps turn counterclockwise (when facing the bottom of the gear) and bring the oil around the pump cavity. The gears come together and force the oil out the opening at the top of the pump cavity. Notice the circled area...this area will shrink when the gear spins





Here we see in pic 2 the area has shrunk and this causes a tremendous amount of pressure between the gears. Hydro relief channels are taking effect now and pushing the extra pressure between the gears to the output side of the oil pump and relieving the tremendous pressure between the gears.





In pic 3 we see the next area above the first starting to shrink and building pressure. The area below is opening up and causing a small suction. Here we see the hydro relief channels doing their job once again relieving the tremendous pressure yet again from the other side.



This cycle starts over again with the idler gear side as shown in pic 1. These gears with HRC's cause less wear on the distributor gear and camshaft gear (which drives the oil pump) and less wear in the pump and on the gears caused by this pressure pushing and pulling the gears at different RPM's and throttle changes. These gears can also give 20% less wear in the pump cavity due to relieving the pressure between them. While not 100% of the pressure is relieved it is substantial.


This type of modification is good for high RPM's as well but shines throughout the RPM range.
__________________
MFGS of the STAR-LAB CNC machines

The finest CNC plasma tables
Made in the USA by Bulltear and can be found online at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and at local welding stores
Hypertherm and Thermal Dynamics
We also make parts for AMC


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MC is offline   Reply With Quote Quick reply to this message
Old 10-05-2006, 02:26 AM   #2 (permalink)
Registered User
 
Join Date: Mar 2004
Member # 28566
Posts: 835
Interesting concept.
Have you documented any gains, such as torque required to rotate the shaft at any given RPM? Is output pressure and/or flow affected in any way?
LilRocky is offline   Reply With Quote Quick reply to this message
Sponsored Links
Old 10-05-2006, 05:34 AM   #3 (permalink)
MC
Nose to grindstone
 
MC's Avatar
 
Join Date: Aug 2003
Member # 21997
Location: Sweat equity - We live it
Posts: 8,180
Blog Entries: 1
Send a message via Yahoo to MC
We have not seen a gain or loss in pressure however YES it does take less torque to rotate these. When your priming is when you will feel the torque first hand.....and its alot less
__________________
MFGS of the STAR-LAB CNC machines

The finest CNC plasma tables
Made in the USA by Bulltear and can be found online at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and at local welding stores
Hypertherm and Thermal Dynamics
We also make parts for AMC


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MC is offline   Reply With Quote Quick reply to this message
 
Old 10-05-2006, 06:36 AM   #4 (permalink)
Registered User
 
Join Date: Jul 2006
Member # 74881
Location: Worcester, MA
Posts: 376
Great idea, will these gears come in the preassembled timing cover kit you sell?
mika360 is offline   Reply With Quote Quick reply to this message
Old 10-05-2006, 08:20 AM   #5 (permalink)
MC
Nose to grindstone
 
MC's Avatar
 
Join Date: Aug 2003
Member # 21997
Location: Sweat equity - We live it
Posts: 8,180
Blog Entries: 1
Send a message via Yahoo to MC
I believe we will do them in all Ni coated covers. They will also sell as a stand alone.
__________________
MFGS of the STAR-LAB CNC machines

The finest CNC plasma tables
Made in the USA by Bulltear and can be found online at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and at local welding stores
Hypertherm and Thermal Dynamics
We also make parts for AMC


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MC is offline   Reply With Quote Quick reply to this message
Old 10-05-2006, 07:35 PM   #6 (permalink)
Registered User
 
Join Date: Sep 2006
Member # 79320
Location: St.C Ohio
Posts: 57
Send a message via AIM to 80cj-5
Hey MC, i bought one of your nickel plated covers a few months ago and havent installed it yet...but im wondering if you could some how hook me up with a set of those gears. Or if all else fails how much are they running per set?
80cj-5 is offline   Reply With Quote Quick reply to this message
Old 10-05-2006, 07:58 PM   #7 (permalink)
MC
Nose to grindstone
 
MC's Avatar
 
Join Date: Aug 2003
Member # 21997
Location: Sweat equity - We live it
Posts: 8,180
Blog Entries: 1
Send a message via Yahoo to MC
Tell you what for the price of a case of beer I will do up your idler gear for you. Just send it back... I am going fishing till next wednesday and the shop will be empty except for Pete but he wont be answering phones. You can send them in and Pete will line them up.
__________________
MFGS of the STAR-LAB CNC machines

The finest CNC plasma tables
Made in the USA by Bulltear and can be found online at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and at local welding stores
Hypertherm and Thermal Dynamics
We also make parts for AMC


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MC is offline   Reply With Quote Quick reply to this message
Old 10-05-2006, 09:55 PM   #8 (permalink)
Wheeling 24/7
 
Beat95YJ's Avatar
 
Join Date: Aug 2003
Member # 22176
Location: Redondo Beach
Posts: 40,690
MC,

As a person who didn't start with a core motor, I am hoping you add the misc parts reqd for the complete build.
__________________
I can break a steel ball in a rubber room!

Companies helping me get dirty:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

& Blaine


:tank:
Beat95YJ is offline   Reply With Quote Quick reply to this message
Old 10-05-2006, 10:03 PM   #9 (permalink)
MC
Nose to grindstone
 
MC's Avatar
 
Join Date: Aug 2003
Member # 21997
Location: Sweat equity - We live it
Posts: 8,180
Blog Entries: 1
Send a message via Yahoo to MC
Quote:
Originally Posted by Beat95YJ
MC,

As a person who didn't start with a core motor, I am hoping you add the misc parts reqd for the complete build.

Let me know what you need Frank
__________________
MFGS of the STAR-LAB CNC machines

The finest CNC plasma tables
Made in the USA by Bulltear and can be found online at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and at local welding stores
Hypertherm and Thermal Dynamics
We also make parts for AMC


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MC is offline   Reply With Quote Quick reply to this message
Old 10-06-2006, 11:38 AM   #10 (permalink)
Wheeling 24/7
 
Beat95YJ's Avatar
 
Join Date: Aug 2003
Member # 22176
Location: Redondo Beach
Posts: 40,690
Actually I have been able to fiind most of it thru American Parts Depot. It seems as though some parts are harder to locate. The cap for the oil pressure spring required a trip to the junkyard for example. It is a small random part that isn't available anywhere new.

Also odd question, my new damper has a BBC bolt pattern. Does anyone make an AMC 3 groove pulley to fit this pattern and line up? Id rather not cheese it together at this point.
__________________
I can break a steel ball in a rubber room!

Companies helping me get dirty:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

& Blaine


:tank:
Beat95YJ is offline   Reply With Quote Quick reply to this message
Old 10-06-2006, 09:42 PM   #11 (permalink)
MC
Nose to grindstone
 
MC's Avatar
 
Join Date: Aug 2003
Member # 21997
Location: Sweat equity - We live it
Posts: 8,180
Blog Entries: 1
Send a message via Yahoo to MC
We do
__________________
MFGS of the STAR-LAB CNC machines

The finest CNC plasma tables
Made in the USA by Bulltear and can be found online at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and at local welding stores
Hypertherm and Thermal Dynamics
We also make parts for AMC


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MC is offline   Reply With Quote Quick reply to this message
Old 10-06-2006, 09:45 PM   #12 (permalink)
Wheeling 24/7
 
Beat95YJ's Avatar
 
Join Date: Aug 2003
Member # 22176
Location: Redondo Beach
Posts: 40,690
I'll call on Monday, thanks a bunch.
__________________
I can break a steel ball in a rubber room!

Companies helping me get dirty:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

& Blaine


:tank:
Beat95YJ is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum 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 for yourself.

** A VERIFICATION EMAIL IS SENT TO THIS ADDRESS TO COMPLETE REGISTRATION!! **

Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools
Display Modes

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



All times are GMT -7. The time now is 05:07 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.