If i remember right i read that there is no such thing is a Chromemoly ring its called a Moly ring instead, I was sort of concerned cause as i bought my rebuild parts i ordered Sealed Power rings and as i called the technician at summit he stated that its Sealed Power Chromemoly rings and stated there very good rings, Is there a such thing as Chromemoly or not? Anyone every have these rings, how were they? He told me he had them rings on his 383 chevy and never had a problem with it.

 

No such thing as a chromemoly ring. There are rings called Moly rings, like the SpeedPro/Sealed Power rings you just got that are moly impregnated to aid in almost instant ring sealing. These are what you want for a high performance street applicaiton.

There are chrome rings that are commonly used in dirt track environments. Chrome rings are harder than cast or ductile rings and are more resistant to dirty/dusty environments. They need a different honing method to ensure a good ring seal and are generally not recommended for street applications.

It's incorrect, but it seems alot of people erroneously call Moly rings "Chromemoly".

 

c&b

 

there's no such a thing as mollychrome rings, no way.
it's either :
1- the standard rings (i think it's called iron something)
2-chrome rings
3-molybdenum rings (moly) (i'd go for those personally)
you can't mix them on rings, that's a chemical impossible (moly-chrome) i've read that in chevy high performance. or superchevy.
Fernando

 

Hey Mig, have you ever heard of chromemoly tubing being used for a roll cage? Every tech inspector in the world has. There is chromemoly steel. I have used it before. The tech inspector has to know b/c you can use thinner wall tubing if you use chromemoly steel, instead of mild steel. Moly rings, chromemoly rings, whatever you want to call them are a good choice. They tend to last longer unser tough conditions that ductile iron rings would. I have never heard, or used chrome rings, so I can't comment on those.

 

A nodular or cast iron ring can have a 'moly' (molybdenum) facing, usually only the top ring is moly faced, but some ring packages also offer it on the 2nd ring. Moly rings main benefits are that they seat very quickly, for this reason and their duration advantages, they are the best bet for hot street engine and most race engines.

Chrome or Moly rings are totally different, seperate, and have nothing at all to do with Chromemoly steel tubing used for frames and rollcages.

Chrome rings are merely ductile iron rings that are electroplated with chromium. As I mentioned before, the use of chromium plated rings requires a special honing prep of the cylinder walls to ensure proper sealing and is only recommended for dirt track applications. While the chrome rings are harder and offer durability advntages in hostile environemensts, the break-in problems combined with the advantages of moly rings eliminate them as the wise choice for a street application.

 

Before this gets out of hand...

Go to www.summitracing.com . Do a p/n search on SLP-E-251K, for instance.

"Piston rings for your stock or mild performance rebuild.
Chromemoly, 4.00 in. bore, 5/64 in. top/second ring, 3/16 in. oil control ring, piston ring set.
This ductile iron, moly ring set will seal mild to high compression engines and help protect against oil blowby. It has standard ring end gaps..." (emphasis added)

Or if you like, Total Seal p/n TSR-369003091-08, finish description - "chromemoly".

Perhaps a little trade-naming is a dangereous thing.

 

Actually, I am nearly certain what you will find in after a few months of debate is that it is a terminology problem. They are chrome moly rings because the top compression ring has some form of moly plated/impregnated/whatever on it. The base ring is a ductile iron. The 2nd ring is either a ductile or just regular iron ring. The oil control ring on chrome/moly sets is chrome plated. Hence why they call them chrome/moly ring sets. The chrome and moly don't go on the same ring but they are part of the same ring set. There are however chrome compression rings. As I hear it these are a total pain. They are very difficult to get to seat but work pretty well once they do. So they are a waste of time for 99% of the engines in use. Plasma moly/chrome rings sets like you see plastered all over the catalogs are the best route for almost every engine.

Ok, figured I would need some back-up so I got this.

http://www.federal-mogul.com/sealedp...led_power.html

And I am not afraid to use it. So don't nobody go slinging mud in my eye about how I am dangerous because I don't know anything.