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Arnolds64
Samba Member
Joined: May 07, 2004
Posts: 724
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 Posted: Tue Jun 16, 2009 8:32 pm Post subject: Air cooled Aluminum's |
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I have a been running them since my build on the engine in my signature. I am running stock Rockers and German Mahle Lifters Engle 110. They stay in spec really nicely and sound stock.
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64 Bug, White, 2017, Dual Weber 44's, Engle 130/Engle lifters, Home P&P'd 40X35 heads, CB 4340 nitrided crank, Eagle knock off H Beam 5.5" rods, Lowering Beam, Rancho Trans, Traction Bar. 225X60's rear, 145's front on Porsche Chrome Nipple Wheels. |
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Bruce
Samba Member
Joined: May 16, 2003
Posts: 17667
Location: Left coast, Canada
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| Posted: Sat Jun 13, 2009 10:47 pm Post subject: |
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| youngstah wrote: |
| What about heat transfer, would non tapered be a more even distribution of material accounting for this? |
Heat transfer? From where to where?
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| overheard at the portland Swap Meet... wrote: |
| ..... a steering wheel made from a mastadon tusk..... |
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the caveman
Samba Member
Joined: August 09, 2004
Posts: 885
Location: island state of Montreal
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| Posted: Fri Jun 12, 2009 1:26 pm Post subject: |
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| I run AC.NET ones on my 2165 [94x78] CB 044's w/duals and dual 44mm idf's . I also spent the time to do the valve train geometry properly at the same time at my last rebuild. The days of valve train noise and constant adjustments seem to be over. I don't usually pull more than 6500 rpms; and am now very happy. |
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youngstah
Samba Member
Joined: December 28, 2008
Posts: 89
Location: california
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| Posted: Fri Jun 12, 2009 7:11 am Post subject: |
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What about heat transfer, would non tapered be a more even distribution of material accounting for this?
Can someone post a picture of a stock vs bus vs fancypants (aircooled) pushrod next to each other in the same pic? ...for visual contrast of scale. |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Fri Jun 12, 2009 6:52 am Post subject: |
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BTW, this is also why factory pushrods are straight and not tapered.
John
Aircooled.Net Inc.
| nsracing wrote: |
I know but it is just easier to chuck and cut the darn thing on the lathe to size. So you do not have a work stick-out of 6 inches!  |
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It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
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Bruce
Samba Member
Joined: May 16, 2003
Posts: 17667
Location: Left coast, Canada
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| Posted: Thu Jun 11, 2009 11:11 pm Post subject: |
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| [email protected] wrote: |
| ... the additional diameter is NOT NEEDED at the ends, since the ends do not flex. |
I concur. The extra diameter to the ends just adds weight and no strength since there's no bending happening at the tips.
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| overheard at the portland Swap Meet... wrote: |
| ..... a steering wheel made from a mastadon tusk..... |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Thu Jun 11, 2009 9:38 am Post subject: |
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THAT IS TRUE!
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It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
"Like" our Facebook page at
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9750
Location: NOVA
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| Posted: Thu Jun 11, 2009 9:33 am Post subject: |
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| [email protected] wrote: |
I don't know. In ME classes you learn that the additional diameter is NOT NEEDED at the ends, since the ends do not flex.
John
Aircooled.Net Inc. |
I know but it is just easier to chuck and cut the darn thing on the lathe to size. So you do not have a work stick-out of 6 inches! |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Thu Jun 11, 2009 9:24 am Post subject: |
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I don't know. In ME classes you learn that the additional diameter is NOT NEEDED at the ends, since the ends do not flex.
John
Aircooled.Net Inc.
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It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
"Like" our Facebook page at
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9750
Location: NOVA
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| Posted: Thu Jun 11, 2009 9:22 am Post subject: |
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John,
Can the heavier aluminum pushrods be ordered without the tapers?
I really like them just consistent diameter along its entirety. That will also be something if they come the size of Bus pushrods. |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Thu Jun 11, 2009 8:37 am Post subject: |
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our Dual Tapered are much stronger, if you are worried about that. They are also more $.
John
Aircooled.Net Inc.
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It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
"Like" our Facebook page at
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and get a 5% off code for use on one order for VW Parts ON OUR PARTS STORE WEBSITE, vwparts.aircooled.net |
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9750
Location: NOVA
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| Posted: Thu Jun 11, 2009 8:14 am Post subject: |
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The rule w/ pushrods is they have to be as stiff as possible...especially the exhaust side.
I only WISH the aluminum pushrods available are as stout as the stock Type IV size. I wonder if they can be had w/ wall thickness as Bus pushrods.
I like the BERG chromoly and use them exclusively for large strokers w/ heavy springs.
I have machined/ sized AC.NET aluminums for strokers. I wish they are much fatter. |
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Teeroy 
Samba Member
Joined: April 20, 2003
Posts: 3893
Location: Eastern WA
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| Posted: Wed Jun 10, 2009 11:42 pm Post subject: AC.net/aircooled.net HD alu pushrods |
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I'm running my with stock lash, no problems.
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www.autosportsnorthwest.org |
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bigsid
Samba Member
Joined: April 12, 2005
Posts: 53
Location: Southampton UK
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| Posted: Wed Jun 10, 2009 11:39 pm Post subject: |
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| On a related topic, would HD aluminum pushrods be set with the same valve clearance as a stock pushrod ? |
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Eaallred
Samba Member
Joined: May 18, 2003
Posts: 5756
Location: West Valley City, Utah
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| Posted: Tue Apr 07, 2009 12:37 pm Post subject: |
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| Max Welton wrote: |
Eric, would you also be factoring in the pushrod weight difference in spring selection?
Max |
I would have Jeff do that. That's why I would need to decide if I were going to switch to alum or keep my chromo before I were to send him my heads. I could get quite a few more rpm's out of this motor with Ti valves and alum pushrods.
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Eric Allred
You have to remember something: Everybody pities the weak; Jealousy you have to earn. |
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krusher
Samba Member
Joined: September 24, 2002
Posts: 7661
Location: europe
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| Posted: Tue Apr 07, 2009 10:53 am Post subject: |
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I have the aircooled.net alu pushrods on my 112hp 1800, very happy, much quieter that the horrible cr-mo's i had before.
Cant say a bad thing about them.
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Max Welton
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Joined: May 19, 2003
Posts: 11139
Location: Black Forest, CO
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Eaallred
Samba Member
Joined: May 18, 2003
Posts: 5756
Location: West Valley City, Utah
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| Posted: Tue Apr 07, 2009 8:55 am Post subject: |
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| Alan_U wrote: |
| Eaallred wrote: |
| I've been toying around with the idea of the dual tapered aluminum in my race car. It see's 9000rpm with K-800's and heavy 48mm intake valves. It's tempting to try, but i'll probably wait until I go Ti valves at least. |
Eric,
Your probably better off using ultra light ti valves with tapered chromoly for added clearance in the pushrod tube.
At 8500rpms or so you dont need k800's with ti. The "regular" chevy springs should be enough. |
Yea, my plan (eventually if money issues don't keep getting in the way) is to send my heads down to Jeff Denham and have him install Ti and re-do the valve springs to what he feels they should be. I'll need to decide between alum and chromo pushrods at that time. Alum is big diameter. I've switched to waterboxer tubes for more clearance, I don't know how close the alum will be though. Might have to buy a single and check it out at that time.
If I don't sell the car that is. I just finished a major project on it that is making me want to keep it now, hahaha
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Eric Allred
You have to remember something: Everybody pities the weak; Jealousy you have to earn. |
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Alan_U
Samba Member
Joined: July 10, 2004
Posts: 1762
Location: Vancouver, BC Canada
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| Posted: Tue Apr 07, 2009 7:46 am Post subject: |
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| 1961bluebug wrote: |
| Does anybody know what is the typical pressure of VW dual springs? Thanks. |
Different variations out there. Length of valve stems will change seat pressure and cam lift and ratio rockers will effect pressure at the nose of the cam at full lift.
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11.92sec pump gas true daily driver. Who says it cant be done.
No more time for VW's....... |
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1961bluebug
Samba Member
Joined: November 11, 2002
Posts: 1137
Location: Czech Republic, Europe
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| Posted: Tue Apr 07, 2009 7:43 am Post subject: |
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| Does anybody know what is the typical pressure of VW dual springs? Thanks. |
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