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Mad Aussie Porsche nut
Join Date: Jul 2007
Location: Brisvegas Australia
Posts: 183
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2.7 Weber set up ?
Can anyone give me weber setup info on the following 2 engine types :
1st is standard 74 2.7 S Stock CIS engine - I want to remove CIS and put a set of 40IDT's on Venturi- 34 ? Main jets- ? idle jets- ? air correction-? emuls tubes-? 2nd Engine 2.7RS - Mahle p/c - S cams ,headers and a set of 40 IDT's. Venturi-34 ? Main jets- ? idle jets- ? air correction- ? emuls tubes- ? Also is it possible to us a CIS fuel pump with a regulator to reduce the pressure ? Thanks for the help in advance ! |
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10-14-2007, 07:24 PM
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Registered
Join Date: Jun 2004
Location: Bkk Thailand
Posts: 450
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Hi,
my car have 2.7 40IDA webber, the spec are s-cam, JE 9.5:1 ported head etc. This is what pmo recommended me. STEET 34mm venturis 145 main jet 180 air F3 emulsion tubes 60 idle jets note: F3 tubes are NLA (no longer available) and that you usually have to run the F5. For cars that spend more time on the track / high rpms: 36mm venturis 160 min jet 180 air F5 emuls 60 idle And the tall AVs (the cross-hairs looking part at the top of the carb, below the air horns) also PMO sell the fuel pump regulator that work with cis fuel pump. how ever i use the fecet fuel pump. hope this help |
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10-14-2007, 09:13 PM
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Mad Aussie Porsche nut
Join Date: Jul 2007
Location: Brisvegas Australia
Posts: 183
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Thanks for that 10zz964. Anyone have any info on the stock CIS engine ?
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10-15-2007, 08:22 PM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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2nd Engine 2.7RS - Mahle p/c - RS cams, factory heat boxes and a set of 40 IDT's.
Venturi-34 Main jets- 145 idle jets- 57 air correction- 180 emuls tubes- F26 Spark is MSD and Crank optical pickup in standard dizzy.
__________________
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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10-15-2007, 08:48 PM
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Mad Aussie Porsche nut
Join Date: Jul 2007
Location: Brisvegas Australia
Posts: 183
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Thanks JohnJl - Can anyone help with the stock CIS engine ?
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10-16-2007, 02:29 PM
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Registered
Join Date: Dec 2007
Location: London
Posts: 1
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Hi, I have just fitted a STD 2.7 CIS Engine on Webers to my 914... I have read your thread and just wondered if you got sorted in the end and if so would mind sharing with jet and choke sizes etc with me?
I hope you don't and I look forward to hearing from you. Many thanks Andy |
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12-11-2007, 05:01 AM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Quote:
 I would have some 55 idle jets around, just in case.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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12-11-2007, 07:47 AM
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