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Beehive valve springs? #518065
12/09/13 3:34 pm
12/09/13 3:34 pm
Joined: Apr 2007
Posts: 518
Southeast Usa
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Bigtwin Offline OP
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Bigtwin  Offline OP
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Joined: Apr 2007
Posts: 518
Southeast Usa
Hi!
Seeking advice/pro/cons on beehive valve spring set-ups. Please don't laugh,not a pipe-dream, but I am working on a long term 750 Enfield engine project and am down to considering the "best configuration" for the valve train. I've already built up the bottom end & cylinders incorporating thermal/frictionless coatings, etc. Interestingly enough, the engine at hand was previously "hot-rodded" with a set of unidentifiable high lift cams and titanium valve springs. I see that some folks are going to the "Beehive set-ups" similar to the Nascar developed configurations currently in vogue. To be sure the costs are high, as well as the gearhead factor, but what are the pros & cons? Any experience welcome! BTW, the bike is intended for spirited road riding and grudge racing with other Brit enthusiasts. I know, nobody uses REs in anger, but...

REgards!

Bigtwin

Re: Beehive valve springs? [Re: Bigtwin] #518715
12/14/13 3:53 pm
12/14/13 3:53 pm
Joined: Oct 2001
Posts: 541
Howard City, MI
E
Ed V Offline

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Ed V  Offline

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Joined: Oct 2001
Posts: 541
Howard City, MI
Contact Ferrea racing they manufacture valves, springs, collars , keepers etc. www.ferrea.com
This would be a good place to start

Re: Beehive valve springs? [Re: Bigtwin] #518727
12/14/13 5:18 pm
12/14/13 5:18 pm
Joined: Mar 2005
Posts: 10,057
Boston, Massachusetts
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John Healy Online content
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John Healy  Online Content
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Joined: Mar 2005
Posts: 10,057
Boston, Massachusetts
Both R&D and Kibblewhite have Beehive springs that should be applicable to your needs. The R&D springs give a bit softer seat pressure (approx. 85 pounds on a Triumph) while the Kibblewhite ones are closer to 120 pounds).


Re: Beehive valve springs? [Re: Bigtwin] #518737
12/14/13 7:27 pm
12/14/13 7:27 pm
Joined: Oct 2001
Posts: 541
Howard City, MI
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Ed V Offline

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Ed V  Offline

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Joined: Oct 2001
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Howard City, MI
That is good information John I knew Kibblewhite offered them but I don`t like the spring pressures they give. I will look into the R&D springs myself as I have a project I would like to use them on

Re: Beehive valve springs? [Re: Bigtwin] #519145
12/17/13 3:47 pm
12/17/13 3:47 pm
Joined: Apr 2007
Posts: 518
Southeast Usa
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Bigtwin Offline OP
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Bigtwin  Offline OP
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Joined: Apr 2007
Posts: 518
Southeast Usa
Hi & thanks for the shared Info! Both R&D and Ferrea look interesting... Will do some further sleuthing on Kibblewhite.

Thanks!

Bigtwin

Re: Beehive valve springs? [Re: Bigtwin] #519233
12/18/13 12:38 am
12/18/13 12:38 am
Joined: Aug 2001
Posts: 128
California, USA
Dennis M Offline
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Dennis M  Offline
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Joined: Aug 2001
Posts: 128
California, USA
One of the design reasons for the beehive spring is to reduce component weight at the top of the valve. This helps valve control without having to increase spring seat pressure.


Dennis M
Re: Beehive valve springs? [Re: Bigtwin] #519268
12/18/13 9:54 am
12/18/13 9:54 am
Joined: Mar 2005
Posts: 10,057
Boston, Massachusetts
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John Healy Online content
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John Healy  Online Content
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Joined: Mar 2005
Posts: 10,057
Boston, Massachusetts
Dennis: That is a side benefit... The real benefit is from the beehives ability to keep the valve motion under control. The decreasing diameter greatly reduces harmonic spring vibration. Reducing, or eliminating harmonic vibrations, where the valve is totally under the control of the spring vibration, and not the camshaft, increases horsepower. Another side benefit is, unlike some racing springs which have a limited life, beehives have been proven suitable for long term street use.

I recently retested a set of R&D beehives that went through a season of dirt track racing. Before the change to the R&D beehive springs they were barely getting a couple two day weekends of racing before the power fell off dramatically. This meant he was changing springs almost once a month. All, but one of the springs tested with less than a couple percent loss in full lift pressure and the 4th was had a bit more loss. Not bad for a full season of very competitive racing.

Last edited by John Healy; 12/18/13 11:02 am.


Moderated by  Allan Gill 


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