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motomorrelli Samba Member
Joined: March 08, 2011 Posts: 10 Location: Daytona Beach
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Posted: Mon Jul 03, 2017 10:04 am Post subject: Alternate carb options on air cooled 911 |
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Have read many forums regarding non traditional / experimental carb set ups. Most just fizzle out with no results. I am looking for a performance carb option for a 2.7 powered kit car I am rebuilding. Last car I built is an mg midget that among many other mods I installed & tuned a set of 4 34mm Keihin side draft carbs (motorcycle) to fuel injection quality. Given the engine configuration it would seem to be far more difficult on a flat 6, linkage etc. Other options, (don't want to spend the $ on webers or pmo)
Single 4 barrel on custom intake? 3 double carb units from a large V6 outboard? Other ideas are welcome |
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BK911 Samba Member
Joined: May 11, 2005 Posts: 98 Location: Rocky Top, TN
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Posted: Thu Aug 10, 2017 12:18 pm Post subject: Re: Alternate carb options on air cooled 911 |
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Zenith carbs originally came on the 2.2Ts and are relatively cheap.
Parts are finally available to set them up for other engines up to a 3.0. _________________ '72 914 1.7
'74 Standard Bug 1600 |
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Glenn Mr. 010
Joined: December 25, 2001 Posts: 76901 Location: Sneaking up behind you
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Posted: Thu Aug 10, 2017 12:23 pm Post subject: Re: Alternate carb options on air cooled 911 |
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PORSCHE = $$$$
Get the PMO, you'll cry only once. Then enjoy many miles of driving. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare |
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Jacks Samba Member
Joined: July 15, 2006 Posts: 2347 Location: San Clemente, Ca.
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motomorrelli Samba Member
Joined: March 08, 2011 Posts: 10 Location: Daytona Beach
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Posted: Sun Aug 13, 2017 9:43 am Post subject: Re: Alternate carb options on air cooled 911 |
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I've seen that, even spoke to the 4 barrel guru himself. He doesn't recommend it on a street car. I am considering the triple jet ski carbs. Polaris 750 has a setup that should work nicely. |
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Starbucket Samba Member
Joined: April 30, 2007 Posts: 4025 Location: WA
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Posted: Mon Aug 14, 2017 12:53 pm Post subject: Re: Alternate carb options on air cooled 911 |
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750 carbs will be way too small it will run like a 67 VW. The 4 barrel manifold will work great with a Holly 450 dbl. pumper. You will need to plumb your oil lines through those fittings as the plentum needs heat to vaporize the gas or it will stumble and die when cold and never run right. |
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motomorrelli Samba Member
Joined: March 08, 2011 Posts: 10 Location: Daytona Beach
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Posted: Mon Aug 14, 2017 1:10 pm Post subject: Re: Alternate carb options on air cooled 911 |
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750 x 2 = 1500 x 2 (2 stroke) = 3.0 liter Two Strokes taken twice as much air as a 4-stroke. Bottom line is the size of the Venturi all else can be worked with |
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