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Pharquarx
Samba Member
Joined: August 24, 2005
Posts: 249
Location: Southern California (Orange County)
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 Posted: Fri Jul 09, 2010 10:10 pm Post subject: 40 hp Fan on a Stock 36 hp engine |
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Can a 40 hp fan be installed in a 36 hp stock engine for improved cooling? If so, is there a significant/noticeable improvement in the amount of cooling?
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Charlie
Stock 67 Vert Under Restoration
1958 Lambretta TV175 Series 1
1957 Vespa Messerschmitt 150 GS
1951 Douglas Vespa Rod Type (First month of production!!!)
1970 Triumph T120R (Bonneville)
1950 Vincent Comet
1952 Moto Rumi Sport 125
1973 Ducati 750 Sport |
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 26288
Location: Olympia Wash Rinse & Repeat
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| Posted: Sat Jul 10, 2010 12:42 pm Post subject: |
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40 HP fan will fit and cool better.
You can even install a 1500/1600 SP 29 mm or the DH 33, 34, or 35mm wide fan, but would need to add the earlier gen cooling holes to the fan.
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In Stereo, Where Available! |
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vw54john
Samba Member
Joined: March 12, 2004
Posts: 147
Location: Windham, CT USA
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| Posted: Mon Jul 12, 2010 9:07 am Post subject: |
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Yes, you can do this, and as Eric&Barb said you can even use the later 1500/1600 fan. However, I've tried both of these options with perfectly balanced, un-warped fans, and found that there was significantly more cooling fan noise. Can't explain this.... maybe just the increased air flow and the aerodynamics of the 36hp fanshroud. I ended up putting the 36hp fan back in because all the extra noise annoyed me.
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Regards, John
'54 Strato Silver Oval |
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Pharquarx
Samba Member
Joined: August 24, 2005
Posts: 249
Location: Southern California (Orange County)
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| Posted: Mon Jul 12, 2010 9:57 am Post subject: |
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Understood, appreciate the input. I have a NOS 40 hp fan on order and am also planning on removing the automatic air cooling control and the throttle ring at the air inlet to the fan shroud. Understand this was a common practice here in Southern California, although I would like to keep it as it was "part of the deal". This is all to maximize the cooling now that I have the Judson Supercharger. I also have installed a Fram Filter and a cooling coil at the air inlet that was made by Steph. John Moxon recommended the installation of the Abarth style exhaust, which I have done, to open up the back end with a side benefit of increasing flow through the engine and cooling. Not that the resulting operation to date with the Supercharger is impossibly hot, I just want the benefit of as much cooling as possible. The noise associated with the Supercharger will probably remain the noisiest part of the installation. Again, thanks for the information and input, I will keep you all posted.
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Charlie
Stock 67 Vert Under Restoration
1958 Lambretta TV175 Series 1
1957 Vespa Messerschmitt 150 GS
1951 Douglas Vespa Rod Type (First month of production!!!)
1970 Triumph T120R (Bonneville)
1950 Vincent Comet
1952 Moto Rumi Sport 125
1973 Ducati 750 Sport |
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