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BradH
Not Cheap!! Just Thrifty!!


Reged: Jan 30 2003
Loc: Not here, bro!
Any downsides to running Napier 2nd rings?
      #7095963 - Wed Feb 29 2012 08:17 AM

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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DISCLAIMER: The opinions above have been posted by a street-car test-n-tuner with a "toy" flowbench and a rusty 10-second '73 Challenger that hasn't run since 2009


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neonic
enthusiast


Reged: Jun 07 2007
Loc: SD USA
Re: Any downsides to running Napier 2nd rings? [Re: BradH]
      #7096001 - Wed Feb 29 2012 08:48 AM

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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Mopar_Rich
mopar addict


Reged: Jan 22 2003
Loc: Sonora CA
Re: Any downsides to running Napier 2nd rings? [Re: BradH]
      #7096019 - Wed Feb 29 2012 09:01 AM

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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SB412DUSTER
super gas


Reged: Jun 24 2004
Loc: Mobile Alabama
Re: Any downsides to running Napier 2nd rings? [Re: neonic]
      #7096020 - Wed Feb 29 2012 09:01 AM

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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CompWedgeEngines
master


Reged: Nov 03 2004
Loc: Syracuse,NY
Re: Any downsides to running Napier 2nd rings? [Re: BradH]
      #7096245 - Wed Feb 29 2012 11:42 AM

All positive in my book.

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


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BradH
Not Cheap!! Just Thrifty!!


Reged: Jan 30 2003
Loc: Not here, bro!
Re: Any downsides to running Napier 2nd rings? [Re: SB412DUSTER]
      #7096364 - Wed Feb 29 2012 12:49 PM

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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moparniac
Pump Gas SleDgIE


Reged: Feb 05 2007
Loc: U.S.
Re: Any downsides to running Napier 2nd rings? [Re: BradH]
      #7096432 - Wed Feb 29 2012 01:29 PM

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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'71 Dodge Dart - Wedge
'11 Dodge Ram - HEMI


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70Cuda383Moderator
Kaptain Kuda


Reged: Oct 07 2003
Loc: Marysville, O-H-I-O
Re: Any downsides to running Napier 2nd rings? [Re: moparniac]
      #7096618 - Wed Feb 29 2012 03:13 PM

Total seal reccomended them on the boost build we're putting together. Stainless top ring and Napier 2nd rings

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HPMike
master


Reged: May 11 2005
Loc: NJ-USA
Re: Any downsides to running Napier 2nd rings? [Re: CompWedgeEngines]
      #7096626 - Wed Feb 29 2012 03:17 PM

Quote:

All positive in my book.




mine too...

MB


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