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 !

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

Thanks for that 10zz964. Anyone have any info on the stock CIS engine ?

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.

Thanks JohnJl - Can anyone help with the stock CIS engine ?

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

This setup works fine on a 2.7 stock CIS engine,...:)

I would have some 55 idle jets around, just in case.