The Ford Barn

Drbrown · 03-28-2016, 11:53 AM

For what its worth and without debating NOS vs. "modern" rings ....
Per Ford Manual .... The 85 HP V8 was the change from 3-ring to 4-ring pistons and as noted above, production engines did not use expanders behind the rings .... For those with the 3-ring pistons, service sets used expanders on No. 2 and No. 3, and No. 3 oil ring was a 3-piece steel and cast iron assembly. For 4-ring pistons, service sets used expanders with the No. 2 compression and No. 3 oil ring .... but particular sets in this group were to be selected pending the specific work performed or not performed on the cylinder walls. The No. 4 oil control ring was one-piece. Testing of ring-fit varied slightly between pistons marked Canadian and U.S.A.

GB SISSON · 03-28-2016, 02:41 PM

Are modern rings still cast iron? I hear the term 'chrome moly rings'

ajmac · 03-28-2016, 02:52 PM

So chaps, you are hand on heart telling me that with usage of no more than 50 miles per year this guy is going to actually see a difference in his lifetime between fitting modem rings or NOS ford rings? Electronic ignition is a must as the thing is almost impossible to access in a carrier.
If you really want to worry he has supplied a 1940s NOS gasket set too, complete with old copper head gaskets. Now if it were mine I would definitely fit modern composite as I did on the 24 stud in my carrier.

Drbrown · 03-28-2016, 03:38 PM

GB SISSON: Don't know but cast iron rings I would doubt. Seen it said that chrome rings need careful and complete honing to brake-in. Used chrome in '57 on a '51 Merc rebuild and broke in okay .... kids' luck probably.

SofaKing · 03-28-2016, 03:40 PM

Quote:

Originally Posted by ajmac

So chaps, you are hand on heart telling me that with usage of no more than 50 miles per year this guy is going to actually see a difference in his lifetime between fitting modem rings or NOS ford rings? Electronic ignition is a must as the thing is almost impossible to access in a carrier.
If you really want to worry he has supplied a 1940s NOS gasket set too, complete with old copper head gaskets. Now if it were mine I would definitely fit modern composite as I did on the 24 stud in my carrier.

What they are expressing is: 1. New ring technology is better than old ring technology. 2. They prefer the new ring technology because it is better. You are building an armored personnel carrier or Bren Gun Carrier, correct? It weighs what, 5000+ Lbs and came with 85HP. No one here would notice the difference in performance by the seat of the pants. Fifty miles a year is 500 miles per decade so if this guy lives another 100 years he'll have 5000 miles on your rebuild. I'm guessing he won't notice but that is just my opinion.

flatheadmurre · 03-28-2016, 04:51 PM

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Both chrome and moly is a facing put on a steel ring.
Chrome is great for hightemp highpressure turbodiesels.
Still no clue if this engine has a fresh bore or if its a re-ring job.
Sticking moly rings in a re-ring overhaul...i would just use the supplied cast rings and not worry about it.
The difference in power and lifespan of the engine won´t matter in this case.

03-28-2016, 11:53 AM	#21
Drbrown Senior Member Join Date: Oct 2013 Location: Glens Falls NY Posts: 1,267	Re: Piston Rings with Springs? For what its worth and without debating NOS vs. "modern" rings .... Per Ford Manual .... The 85 HP V8 was the change from 3-ring to 4-ring pistons and as noted above, production engines did not use expanders behind the rings .... For those with the 3-ring pistons, service sets used expanders on No. 2 and No. 3, and No. 3 oil ring was a 3-piece steel and cast iron assembly. For 4-ring pistons, service sets used expanders with the No. 2 compression and No. 3 oil ring .... but particular sets in this group were to be selected pending the specific work performed or not performed on the cylinder walls. The No. 4 oil control ring was one-piece. Testing of ring-fit varied slightly between pistons marked Canadian and U.S.A.

03-28-2016, 02:41 PM	#22
GB SISSON Senior Member Join Date: Jan 2014 Location: Orcas Island Washington Posts: 4,954	Re: Piston Rings with Springs? Are modern rings still cast iron? I hear the term 'chrome moly rings' __________________ Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson)

03-28-2016, 02:52 PM	#23
ajmac Member Join Date: Nov 2012 Location: Lincoln, UK Posts: 50	Re: Piston Rings with Springs? So chaps, you are hand on heart telling me that with usage of no more than 50 miles per year this guy is going to actually see a difference in his lifetime between fitting modem rings or NOS ford rings? Electronic ignition is a must as the thing is almost impossible to access in a carrier. If you really want to worry he has supplied a 1940s NOS gasket set too, complete with old copper head gaskets. Now if it were mine I would definitely fit modern composite as I did on the 24 stud in my carrier. __________________ Alastair --------------- Loyd Carrier - Under Restoration Loyd Project on Facebook Last edited by ajmac; 03-28-2016 at 02:58 PM.

03-28-2016, 03:38 PM	#24
Drbrown Senior Member Join Date: Oct 2013 Location: Glens Falls NY Posts: 1,267	Re: Piston Rings with Springs? GB SISSON: Don't know but cast iron rings I would doubt. Seen it said that chrome rings need careful and complete honing to brake-in. Used chrome in '57 on a '51 Merc rebuild and broke in okay .... kids' luck probably.

03-28-2016, 04:51 PM	#26
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Piston Rings with Springs? Sponsored Links (Register now to hide all advertisements) Both chrome and moly is a facing put on a steel ring. Chrome is great for hightemp highpressure turbodiesels. Still no clue if this engine has a fresh bore or if its a re-ring job. Sticking moly rings in a re-ring overhaul...i would just use the supplied cast rings and not worry about it. The difference in power and lifespan of the engine won´t matter in this case.