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TSPayne
Samba Member
Joined: April 23, 2006
Posts: 73
Location: Spokane, WA
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 Posted: Tue Jan 22, 2019 8:50 am Post subject: Heavy duty aluminum push rods |
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| I have a new set of bug pack (dee engineering) heavy duty aluminum push rods. Cut to length style. My question is, are they strong enough for dual valve springs? Has anyone used these in a similar application? I am considering using them with a Engle 120 or fk8 camshaft. |
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FreeBug
Samba Member
Joined: March 12, 2012
Posts: 4278
Location: deepest, darkest Switzerland
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| Posted: Tue Jan 22, 2019 9:08 am Post subject: Re: Heavy duty aluminum push rods |
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Are they just soft, untreated aluminium? I had some SCAT ones, and they pounded in the ends. And that was just with HD singles. I guess it could have been valve float or excessive lash from ?
Only 2 were killed.
Long story short: get aircooled.net's ally pushrods, that's the real deal. Yes, strong enough for dual springs. |
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Dan Ruddock
Samba Member
Joined: October 25, 2012
Posts: 3594
Location: Sarasota, in my adopted state of Florida
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| Posted: Tue Jan 22, 2019 9:13 am Post subject: Re: Heavy duty aluminum push rods |
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The FK-8 would be a better choice over the W120 but you will need a set of 1.4 ratio rockers. My preference would be the web 86b over the FK-8. On the bugpack pushrods it depends on what alloy they are made from and what the tip design it like. Should be 2024-T3 and the steel tips should be the full diameter of the aluminum rod to reduce the chance of the end pounding loose. The CB and ACN pushrods have these specs but I don't know about the bugpacks.
A 3/8 aluminum pushrod would be ok for your app but they will have some flexing and the downsides that come with that. Too reduce the flexing to not be a factor you would need these. Dan
https://www.thesamba.com/vw/classifieds/detail.php?id=2159797 |
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Dan Ruddock
Samba Member
Joined: October 25, 2012
Posts: 3594
Location: Sarasota, in my adopted state of Florida
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| Posted: Tue Jan 22, 2019 9:19 am Post subject: Re: Heavy duty aluminum push rods |
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The FK-8 would be a better choice over the W120 but you will need a set of 1.4 ratio rockers. My preference would be the web 86b over the FK-8. On the bugpack pushrods it depends on what alloy they are made from and what the tip design it like. Should be 2024-T3 and the steel tips should be the full diameter of the aluminum rod to reduce the chance of the end pounding loose. The CB and ACN pushrods have these specs but I don't know about the bugpacks.
A 3/8 aluminum pushrod would be ok for your app but they will have some flexing and the downsides that come with that. Too reduce the flexing to not be a factor you would need these. Dan
https://www.thesamba.com/vw/classifieds/detail.php?id=2159797 |
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74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7393
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| Posted: Tue Jan 22, 2019 10:22 am Post subject: Re: Heavy duty aluminum push rods |
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No the Bugpacks are not and were known for pounding the ends into the pushrods.
Take a look at Dans, Aircooled.net, or Smith Brothers pushrods at pushrods.net |
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slalombuggy
Samba Member
Joined: July 17, 2010
Posts: 9147
Location: Canada
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| Posted: Tue Jan 22, 2019 11:48 am Post subject: Re: Heavy duty aluminum push rods |
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I'm using CB's Alu. pushrods a big cam and big dual springs
brad |
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neil68
Samba Member
Joined: March 17, 2007
Posts: 3440
Location: Calgary, Canada
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| Posted: Tue Jan 22, 2019 11:35 pm Post subject: Re: Heavy duty aluminum push rods |
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There’s also 7075 aluminum dual-tapered pushrods from Logmech, JPM or Vintage Speed. I use the Logmech pushrods with CB VW650 dual springs in my street-strip Beetle. No issues up to the 8000 rpm rev limiter.
_________________
Neil.
Der Kleiner Rennwagens
68 Beetle 2332 cc, 204 WHP
12.5 seconds @ 107 mph
Dynojet Test: https://www.youtube.com/watch?v=M9B_H3eklAo |
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TSPayne
Samba Member
Joined: April 23, 2006
Posts: 73
Location: Spokane, WA
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| Posted: Wed Jan 23, 2019 7:43 pm Post subject: Re: Heavy duty aluminum push rods |
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| Ok thanks everyone. I think I will reconsider using these push rods. I will probably go with chrome Molly steel ones like I normally do. |
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scotty timmerman
Samba Member
Joined: January 10, 2010
Posts: 1000
Location: gigharbor W.A
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