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Corvair style flatfan
I came across a VW guy that had a flat fan with a 90 degree fan belt.
Has anyone seen one like that on a flat 6? I can guess that they more power to run and that they might slip of. The VW guy told me that it had never slipped of for him. He also supplied me pictures of another VW with a homemade flatfan (the 2 last pictures).     
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Magnus 911 Silver Targa -77, 3.2 -84 with custom ITBs and EFI. 911T Coupe -69, 3.6, G50, "RSR", track day. 924 -79 Rat Rod EFI/Turbo 375whp@1.85bar. 931 -79 under total restoration. |
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09-02-2009, 04:57 AM
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Less brakes, more gas!
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Sure. They were on several of the race cars. There is one on a car I saw at Orbit racing last year. Nice widebody. Very rare though and several posts here on making or building this kind of setup for the 911 engines.
-Michael
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 Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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09-02-2009, 05:12 AM
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Drive it like u stole it.
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They used them on the 935's. They can be fitted to a 911/930 but would require a custom intake and a pile of cash!
euro911sc, I have not been to Rodgers new shop yet. I have heard it is nice. I guess he ran out of room here in Jupiter. -Bill
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____________________________ Bill Jones Jupiter, FL 77 Euro 911 3.0 Wide Body - under construction http://www.flickr.com/photos/rennsport/collections/72157618856489537/ Last edited by jonesb930; 09-02-2009 at 06:24 PM.. |
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09-02-2009, 06:22 PM
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Max Sluiter
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This guy is talking Corvair-style.
935s and prototypes used shafts and bevel gears, much more stout and precise. 
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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09-02-2009, 08:27 PM
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It's overkill for 90% of the engines but it would be cool!!
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Magnus 911 Silver Targa -77, 3.2 -84 with custom ITBs and EFI. 911T Coupe -69, 3.6, G50, "RSR", track day. 924 -79 Rat Rod EFI/Turbo 375whp@1.85bar. 931 -79 under total restoration. |
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09-02-2009, 11:39 PM
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Less brakes, more gas!
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Yeah lots of talk and 'Oh that would be sooo coool!' commentary, but no one actually takes action
 Probably, when you really look into it its just prohibitively expensive.Bill, did they move? I was over at the B-Line hwy. shop and it looks like they have more than enough space... I'm assuming that is his new place and it is really nice. -Michael
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Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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09-03-2009, 04:51 AM
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I don't know what this is in, but someone had posted it before.
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10 Ford Raptor 86 930 |
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09-07-2009, 09:05 PM
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Drive it like u stole it.
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The sound those flat fans make is intoxicating to me at least. I think it is more the gears meshing making the sound then the actual fan.
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____________________________ Bill Jones Jupiter, FL 77 Euro 911 3.0 Wide Body - under construction http://www.flickr.com/photos/rennsport/collections/72157618856489537/ |
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09-08-2009, 02:56 AM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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I value function over form anyday, but this gives full flow. I'd be keen to know what the figures are on that.
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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09-08-2009, 05:03 AM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
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Check out how far underdriven this fan is from the crank...curious what the fan final ratio is. The motor here is flipped? Is the "nose" of the crank carrying another flywheel to the transmission?
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy Last edited by JohnJL; 09-08-2009 at 05:09 AM.. |
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09-08-2009, 05:06 AM
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Location: Santa Cruz Ca
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It's actually overdriven. It looks like the fan turns about twice engine speed which is probably way too fast. The Corvair type belt drive, although badmouthed and poo-poo'd all the way back to 1960, is actually an excellent system when properly set up.
regards, Phil |
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09-08-2009, 09:04 AM
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I don't think that the flat fan gives more air flow at a certain speed. I just think it gives a more even airflow over the cylinders.
But you would have to design and make a new shroud, but how would that be tested? Worst case you might have less air to a cylinder than the stock design.
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Magnus 911 Silver Targa -77, 3.2 -84 with custom ITBs and EFI. 911T Coupe -69, 3.6, G50, "RSR", track day. 924 -79 Rat Rod EFI/Turbo 375whp@1.85bar. 931 -79 under total restoration. |
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09-08-2009, 12:07 PM
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Location: Portland Oregon
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I think its important for the various "designers" of flat fans to take careful note of how far away the 935 FF were mounted above the cylinders,.......
 High velocity air requires space to make turns. On another note, the very LAST place I'd mount intercoolers is above the engine cooling fan. Just think about all that 120+ deg F air getting blown over the engine and how that affects cylinder head temperatures. Pretty well cancels any gains from the IC's.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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09-08-2009, 04:23 PM
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Quote:
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Magnus 911 Silver Targa -77, 3.2 -84 with custom ITBs and EFI. 911T Coupe -69, 3.6, G50, "RSR", track day. 924 -79 Rat Rod EFI/Turbo 375whp@1.85bar. 931 -79 under total restoration. |
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09-08-2009, 10:53 PM
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Originally Posted by Steve@Rennsport
On another note, the very LAST place I'd mount intercoolers is above the engine cooling fan. Just think about all that 120+ deg F air getting blown over the engine and how that affects cylinder head temperatures. Pretty well cancels any gains from the IC's. Isn`t this exactly what a 911 turbo engine sees with a full-bay intercooler  All air goes throe IC before engine fan push it throe engine
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09-10-2009, 11:47 PM
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1977 Porsche 911 Targa 2.7s
Ugly Betty
Project Car
1971 Porsche 911S
930
