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#29797 10/25/2003 4:40 AM | | Anonymous Unregistered | | Anonymous Unregistered | I am about to drag the 292 long block out and resume assembly. I am pretty sure that the rings that it is assembled with are moly rings, I guess I need to double check - they are from Ross who I am pretty sure sourced them from someone else.
At any rate, after reading several of the posts on engines that smoke and comments made about moly rings being hard to get seated - what kind of rings are best for a moderate compression 292?
FY, what kind of rings did you go with? | | |
#29798 10/25/2003 5:08 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | Plain cast iron work real well for anything you will run on the street 
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#29799 10/25/2003 5:12 AM | Joined: Jan 2000 Posts: 1,586 Extreme Gabster | | Extreme Gabster Joined: Jan 2000 Posts: 1,586 | I used moly rings, no problem at all, in fact our other 2 trucks have cast iron and chrome faced rings, no problem either.If the machinist does his job well and you do it right( I can be a hack) and break in the rings strictly to the manafacturers instructions, you won't have any problems either. | | |
#29800 10/25/2003 1:15 PM | Joined: Jan 2001 Posts: 662 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 662 | | | |
#29801 10/26/2003 1:02 PM | Joined: Aug 2000 Posts: 523 Member | | Member Joined: Aug 2000 Posts: 523 | I've used Deves rings for years
The key to 'No smoke'is the oil ring tension and the bore finish
I've never been happy with a one piece cast iron oil ring compression rings are good
Tony's right..the machinist has to do his job
I use a little WD-40 on the ring lands and the rings are seated while your assembling the motor and turning it
The 302 has what ever gmc put in for the Army it uses some oil pint between changes...The 228 had Deves never used a drop
One problem with moly rings is that the dont like a
fuel rich situation!!I you get a stuck float or just don't have the carb dialed in yet you may say goodbye to their effectiveness | | |
#29802 10/26/2003 7:56 PM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Jim,
Will moly rings recover from a rich setup once you fix it or will they be toast once that happens?
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | |
#29803 10/26/2003 8:10 PM | Joined: Dec 2002 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2002 Posts: 50 | I use the cast iron rings that way the rings will wear faster than the block and then I will be able to rering without boring the block. Greg
1951 1.5 ton 4400
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#29804 10/26/2003 9:53 PM | Joined: Aug 2000 Posts: 523 Member | | Member Joined: Aug 2000 Posts: 523 | Moly rings once done are done!AND you only have to run em a very short time rich to kill them
Cast iron does make sense but you need a multi-piece LOW TENSION oil ring
If you ever wondered how to 'Low Tech' test low tension rings:
Put the piston tin the bore w/rings push it to the bottom and drag it back with a fishing scale
Again use WD-40 on the rings
No I'm not gonna tell you what the number shouldbe!
Every builder has some secrets and likes/dislikes
I can tell you that I have mixed and matched oil ring sets and sizes to get numbers I like
And in most cases Deves wins!P.C.Second! TOTAL SEAL
Never!
One more thing....the piston goes in upside down and you pull it back up by the wrist pin
Sorry!!I know some of you would have figured that out!! | | |
#29805 10/26/2003 10:18 PM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | How many beers for the CC measurement on the combustion chamber  Are there any ways to lighten the heavy old pistons in the GMC engines that you recommend?
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#29806 10/27/2003 4:10 AM | Joined: Aug 2000 Posts: 523 Member | | Member Joined: Aug 2000 Posts: 523 | You can use a quart to CC the 228-248 head
I wouldn't be cuttin' much off the stock piston
Sooooo buy Ross
Then 228-248 you can run flat tops and a 270-302 head
Piston weight is a problem only if you wanna rev a bunch
I'm running a 12 port Fisher to lighten the whole mess up | | |
#29807 10/27/2003 6:23 AM | Joined: Oct 2003 Posts: 62 Member | | Member Joined: Oct 2003 Posts: 62 | Hay chuckthetruck,thanks for the Hastings link above. According to it,I did good by installing chrome rings in my 261. I plan on using it in very dusty conditions for which chrome's the best,according to Hastings. Luck is a heck of a good samaritan,sometimes,to stupid fellers like me. jim | | |
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