Need help with rings - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mikep · 07-12-2002, 11:44 PM

Ive got a set of sealed power file to fit moly faced (top ) rings that I am trying to figure out what to file them to. I would think .016" but the WORTHLESS tech sheet that came with the rings has got me confused on what the second ring gap should be. Can anyone tell me what they think of this tech sheet. I cant tell if they reccomend .010" , .012" or .016" for the second ring. It is cast iron.

Super Chevy · 07-13-2002, 12:09 AM

id go .012 or .013

ddsmith · 07-13-2002, 12:17 AM

It looks to me that it depends on the type of engine your building. If your building an engine for supercharged or nitrous then the recommended gaps get bigger. The second ring typically has a closer tolerance on end gap because it is exposed to less heat than the top ring. I would vote for the range of .010-.012". i think this is what their chart is trying to show.

Don

stllookn · 07-13-2002, 09:44 AM

My guess...0.016 in. to 0.018 in. on the top and 0.010 in. to 0.012 in. on the bottom, assuming you are doing a street engine.

flyin99 · 07-13-2002, 12:54 PM

.018 top and .012 on second.you will be ok

mikep · 07-13-2002, 12:58 PM

I went .016" on the top and .011" on the second. Seems tight to me as I have always run .014-.016 on the second but what the hell. Thats what the spec sheet seems to call for so I'll give it a stab. I usually use C&A but I went with sealed power this time.

07-12-2002, 11:44 PM	#1
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Need help with rings Ive got a set of sealed power file to fit moly faced (top ) rings that I am trying to figure out what to file them to. I would think .016" but the WORTHLESS tech sheet that came with the rings has got me confused on what the second ring gap should be. Can anyone tell me what they think of this tech sheet. I cant tell if they reccomend .010" , .012" or .016" for the second ring. It is cast iron. Attached Images __________________ No truck :-(

07-13-2002, 12:17 AM	#3
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	It looks to me that it depends on the type of engine your building. If your building an engine for supercharged or nitrous then the recommended gaps get bigger. The second ring typically has a closer tolerance on end gap because it is exposed to less heat than the top ring. I would vote for the range of .010-.012". i think this is what their chart is trying to show. Don __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

07-13-2002, 09:44 AM	#4
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	My guess...0.016 in. to 0.018 in. on the top and 0.010 in. to 0.012 in. on the bottom, assuming you are doing a street engine. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

07-13-2002, 12:58 PM	#6
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	I went .016" on the top and .011" on the second. Seems tight to me as I have always run .014-.016 on the second but what the hell. Thats what the spec sheet seems to call for so I'll give it a stab. I usually use C&A but I went with sealed power this time. __________________ No truck :-(

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07-13-2002, 12:09 AM	#2
Super Chevy Registered User Join Date: Feb 2001 Location: Ohio Posts: 1,025	id go .012 or .013

07-13-2002, 12:54 PM	#5
flyin99 creator of kong Join Date: Mar 2001 Location: Kentucky Posts: 538	.018 top and .012 on second.you will be ok



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