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ornas's Avatar
 
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Location: Vilnius Lithuania (it's in Europe and it's not Russia)
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motocycle throttle bodies for EFI conversion

Hi, I am thinking about efi conversion to my 86 930 turbo. Here we do not have any experience with porsches tuning, but we have couple hondas and fords with motorcycle's throttle bodies. I was wondering, have someone tried this on porsche? and what benefits or dark aspects you can see in placing 2 3cylinder motorcycle's throttle bodies (off course with another injectors) on 3,3 porsche engine.

Old 11-07-2010, 01:51 AM
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ornas,
I am using some Triumph Daytona 675 throttle bodies (about 2005 model) for a non-turbo 3.6 engine I am working on.
They are 44mm ID at the throttle plate and come in sets of three. They can be separated and spaced further apart, but I decided to keep them together to keep the linkages simple and to suit the same size filter that is used for triple Webers.
The throttle bodies have ports for fuel injectors but I am going to plug these ports and fit my injectors lower down in the intake runners I fabricated.
For a turbo application, obviously you would have to make up some intake plenums, but the rest of the setup could be similar.
I bought these on eBay for $125 each.





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1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911
Old 11-07-2010, 05:34 AM
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Has anyone considered Ducati 916/998 throttle bodies? They're individual TB's matched to large cylinder displacement and, they seem to be priced quite well on eBay.
Of course, fab'ing the whole thing is a killer.
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'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 11-07-2010, 06:02 AM
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talking about Ducati inlets, will be difficult to join thee separate inlets into one working manifold.I was thinking about benelli's or triumph placed without such long intake runners.
Old 11-07-2010, 07:06 AM
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billjam, nice handy work on those stacks...
Old 11-07-2010, 04:04 PM
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Quote:
Originally Posted by WERK I View Post
Of course, fab'ing the whole thing is a killer.
+1 times 100!

If you have to pay someone to do all the design, mock-ups, patterns, moulds and then make the parts in fibreglass, carbon fibre or aluminium, as well as find all the various little widgets and fittings you'll need along the way, FORGET IT! It will cost a fortune.
Fortunately, I like doing that

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Bill
1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911
Old 11-07-2010, 04:44 PM
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