moly rings vs standard - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-30-2003, 08:27 PM
BillyBanana's Avatar
New Member
 
Join Date: Jul 2003
Location: Central NJ
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Angry moly rings vs standard

I am set to build a 383 stroker SBC. Not too crazy HP. I have most of the parts. I did not get moly rings. What would be the need to use them or are standard rings okay?

thankyou veddy mucha'
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-30-2003, 08:31 PM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 7,962
Wiki Edits: 0

Thanks: 13
Thanked 219 Times in 208 Posts
Moly rings when used with the correct cylinder finish and a round bore give a faster break in and the moly face holds a small amount of oil to give a better seal and less friction, the moly also takes heat and rpm better. for street engines or rering blocks that have imperfect bores, cast iron is the ticket!
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-31-2003, 11:57 AM
SAE Member, ASE Master Cert.
 
Join Date: Aug 2002
Location: Twin Lake, MI
Age: 67
Posts: 332
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Billy,
For general engine rebuilding, plain cast iron rings will work well. However for any performance application, moly top rings should be used, as long as the cylinders are properly finished for these rings. Also, be advised that there are several types of moly top rings. The least expensive is cast iron with moly facing, but most premium racing ring sets use either ductile iron or steel top rings, with moly facing. The ductile and steel will hold up much better to high heat and will maintain their shape and tension much better than the grey cast iron ring. The second ring in just about all applications, either racing or street, is usually a grey cast iron, plain ring with tapered face, beveled (reverse twist).
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-31-2003, 01:26 PM
BillyBanana's Avatar
New Member
 
Join Date: Jul 2003
Location: Central NJ
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I did not know that the cylinder needed to be finished for molly rings... I am not looking to race, maybe only once in a while down the 1/4 mile @ raceway park just for kicks, Im just looking to have an engine to "play" with, burn some tires and have fun with... basically just a fast street car. From the replys it sounds like I might be okay with the non moly reg cast irons.
THANKS GUYS!
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-31-2003, 01:33 PM
11echo's Avatar
Old Guys Rule!...EVERYTHING!
 
Last photo:
Join Date: Jun 2003
Location: Bakersfield, CA
Age: 63
Posts: 467
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
As I remember the drill, there are 3 types of rings:

1. Cast Iron rings - These break in VERY fast and last about 50K before they need to be changes out. Normally racer types use these because all they need to do is re-ring the piston and not re-bore the block.

2. Moly rings - This are for the long duration engine build, they last a long time (100K+) and are semi easy on the block. Most engine builders use these type of rings.

3. Chrome Moly rings are the last type. They have a hard chrome facing with makes them last a long time. They are not so easy on the block though ...ie chrome harder then cast iron, your block will ware more then the rings. As I remember these with last about 150K or so. Actually these are the only rings I have never used. I remember my shop teacher re-building his Ferrari V12 with these. You have to do abit more to the cly.s to mate them up AND as I remember they take a LLLOOONNNGGG time to set in properly (20-40k)!!!

My 2 cents! Good Luck! ...Mark
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-31-2003, 02:43 PM
mustang66maniac's Avatar
Ford Freak
 
Last photo:
Join Date: Feb 2002
Location: Rockville, MD
Age: 29
Posts: 676
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
THe third type is chrome rings...theres no such thing as chrome moly rings.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-31-2003, 05:44 PM
11echo's Avatar
Old Guys Rule!...EVERYTHING!
 
Last photo:
Join Date: Jun 2003
Location: Bakersfield, CA
Age: 63
Posts: 467
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
NO SUCH THING AS CHROME MOLY RINGS ...HUH!?? Well mustang66maniac could you contact these guys for me and tell them you can't sell "chrome moly rings" because there are no such thing!

http://www.hm-performance.com/Catalo...Chromemoly.PDF

HEY THX for setting me straight!!! *ROFLOL* ...Mark
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-31-2003, 06:03 PM
mustang66maniac's Avatar
Ford Freak
 
Last photo:
Join Date: Feb 2002
Location: Rockville, MD
Age: 29
Posts: 676
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
O... MY GOD! That WAS SOO FUNNY! haha, im rolling on the floor laughing my *** off too! MAN...good to have a good laugh every now and then huh.

Sorry to bring it to you, there IS NO SUCH THING AS CHROMOLY RINGS! The sets that federal mogul sells have a chrome top ring and moly lower rings.

Maybe you shouldnt flame somebody that has different information than you especially if they're right. You kinda come off as a D!CK, but hey, thats up to you.

By the way, your welcome. Did i mention im only 19?

Last edited by mustang66maniac; 07-31-2003 at 06:22 PM.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-31-2003, 06:20 PM
crazy larry's Avatar
Member
 

Last journal entry: better comparison before and after shots
Last photo:
Join Date: Oct 2002
Location: East Texas
Age: 42
Posts: 2,299
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I know i;m a d!ck, and i know that chrome moly rings don't exist.
there are chrome rings, and there are moly rings, but not chrome moly rings........
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-31-2003, 06:41 PM
Nico's Avatar
Member
 
Join Date: Jun 2003
Posts: 31
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Okey dokey-- I knew there weren't "chrome moly" rings, however I have never used chrome and I don't think I know anyone that has. I didn't know the break-in for chrome rings was such an extended period. I can't imagine that the they take 20-40k to seat properly. Is it really that long?

Nico
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-31-2003, 06:48 PM
NAIRB's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Three wraps on the knuckles, Billy

Now boys, let's stop arguing about piston rings. There are many combinations and materials used in piston rings, contact your manufacturer for specifics concerning the different types of rings available. Ring design has changed throughout the years and yes, back in the day, things were simpler. This technology is changing as we speak. There have been plasma ceramic rings, moly-faced rings, ductile iron rings, gapless rings and nose rings as well as belly button rings, and penile projectile rings, but that's not appropriate here. Study and show thyself approved!!!!
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-31-2003, 07:02 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 46
Posts: 4,822
Wiki Edits: 0

Thanks: 0
Thanked 64 Times in 52 Posts
Quote from Safety Seal Piston Ring Company
Quote:
The Safety Seal Super Moly Compression Ring is the latest advancement in hard surfacing of piston rings. It is available in oxyacetylene plasma applied molybdenum alloys.
Here's the link.

Most "Chrome Moly Rings" I have seen use a thin band of Molybdenum plasma sprayed into a groove machined into the face of the ring. All rings I have seen use the term "Chrome Moly" to denote the material the ring is constructed from also since Molybdenum adheres better to the ring when they share an alloy.

What do you guys call a Chrome Moly ring?
__________________
Outlawed tunes from outlawed pipes
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-31-2003, 07:05 PM
NAIRB's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
A spade.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 07-31-2003, 07:30 PM
BillyBanana's Avatar
New Member
 
Join Date: Jul 2003
Location: Central NJ
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
hey those guys said dick, can you say "dick" here ???
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 07-31-2003, 10:45 PM
crazy larry's Avatar
Member
 

Last journal entry: better comparison before and after shots
Last photo:
Join Date: Oct 2002
Location: East Texas
Age: 42
Posts: 2,299
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally posted by BillyBanana
hey those guys said dick, can you say "dick" here ???
yeah, you can say dick, but not ****? <----- (ock... wth?

i was under the impression that the term "chrome moly" was a slight misnomer, that it actually referred to molybdenum faced rings.... chrome as a chemical is much harder that molybdenum, and smoother, so a chrome ring would not hold oil on its surface as well as a moly ring, moly rings are sposed to be softer, and hold oil in the surFace of it RIGHT????

don't chrome rings wear more than moly's???
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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 -6. The time now is 12:37 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.