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#1188138 - 02/29/12 08:17 AM Any downsides to running Napier 2nd rings?
BradH Offline
I Live Here

Registered: 01/30/03
Posts: 12831
Loc: Valhalla... eventually
I've already got a set of rings for the 452 rebuild in progress, but I'm considering picking up another set that uses Napier 2nds, rather than a standard style. This is a fresh re-hone for a street/strip piece and my intent is to still run standard-tension oil rings, although the ring set I see that includes Napier 2nds is listed as a low tension. Any downsides (besides having to buy another set of rings) to making this switch? Thanks.

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#1188139 - 02/29/12 08:48 AM Re: Any downsides to running Napier 2nd rings? [Re: BradH]
neonic Offline
enthusiast

Registered: 06/07/07
Posts: 251
Loc: SD USA
I run and have ran Napier 2nd rings. We use them to help scrape the walls down on alcohol motors. Have not seen them run on a gas motor but would think they would work fine.

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#1188140 - 02/29/12 09:01 AM Re: Any downsides to running Napier 2nd rings? [Re: BradH]
Mopar_Rich Offline
top fuel

Registered: 01/22/03
Posts: 1724
Loc: Sonora CA
No negative. The special "hooked groove" acts like a one way valve allowing good ring action while relieving any excess pressure between ring 1 and 2. Most of the pro racers use them. They work fine with any oil ring style and any fuel.

On my alcohol motor the oil looks like new when drained. With normal rings I used to get a slight amount of oil dilution.

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#1188141 - 02/29/12 09:01 AM Re: Any downsides to running Napier 2nd rings? [Re: neonic]
SB412DUSTER Offline
top fuel

Registered: 06/24/04
Posts: 2357
Loc: Mobile Alabama
I've ran them for 4 or 5 years now, on gas I like them.

Have you tryed just buyng the second ring and not a full set?
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#1188142 - 02/29/12 11:42 AM Re: Any downsides to running Napier 2nd rings? [Re: BradH]
CompWedgeEngines Offline
master

Registered: 11/03/04
Posts: 3303
Loc: Syracuse,NY
All positive in my book.
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RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.

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#1188143 - 02/29/12 12:49 PM Re: Any downsides to running Napier 2nd rings? [Re: SB412DUSTER]
BradH Offline
I Live Here

Registered: 01/30/03
Posts: 12831
Loc: Valhalla... eventually
Quote:

Have you tryed just buyng the second ring and not a full set?



Not cost effective, from what I see for the price of just the 2nd rings...

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#1188144 - 02/29/12 01:29 PM Re: Any downsides to running Napier 2nd rings? [Re: BradH]
moparniac Offline
master

Registered: 02/05/07
Posts: 6295
Loc: U.S.
They work great in my local 93 pump gas engine... One thing I had noticed over my last setup was (I run evac system)is that my dipstic tube doesn't pop out at all like it did some before on the big end
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Mopar Performance

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#1188145 - 02/29/12 03:13 PM Re: Any downsides to running Napier 2nd rings? [Re: moparniac]
70Cuda383 Offline


Registered: 10/07/03
Posts: 21226
Loc: Marysville, O-H-I-O
Total seal reccomended them on the boost build we're putting together. Stainless top ring and Napier 2nd rings
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#1188146 - 02/29/12 03:17 PM Re: Any downsides to running Napier 2nd rings? [Re: CompWedgeEngines]
HPMike Offline
master

Registered: 05/11/05
Posts: 6444
Loc: NJ-USA
Quote:

All positive in my book.




mine too...

MB

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