Here's some output from a little Weber jetting program I have. Looks like for
a L18 with peak power at 6500rpm, tuned for outright power it doesnt matter
whether you get 40's or 45's.
Weber Carb Settings Dellorto Carb Settings
Ideal carb size 40-45 DCOE 40-45 DHLA
Choke size 36 36
Main jets 145 145
Emulsion tubes F9/F16 7772.6
Air correctors 180 180
Idle jets 45f9 (Weak F8/F F2 Rich F6) 45/7850.2 (Weak .6/.1 Rich .8)
Pump Jets 35/40 35/40
Aux Venturis 4.5 7848.2
<---------------Idle Airs------------> <-------------Idle Airs---------->
Weaker Normal Richer Weaker Normal Richer
F3,F1,F7,F5,F4,F2,F13,F11,F8,F9,F12,F6 7850.5 .10 .9 .4 .1 .3 .6 .7 .2 .8
Idle jet airs in common use, weak to rich
F2 F11 F8 F9 F6 7850.1 7850.6 7850.2 7850.8
-----Original Message-----
From: Craig Guppy [mailto:[EMAIL PROTECTED]]
Sent: Monday, 10 December 2001 10:17 PM
To: [EMAIL PROTECTED]
Subject: carbies
list,
i'm looking to upgrade my carbies from SU's to Webers soon. i've got an L18,
medium street cam (powerband 3000-6500rpm), and ported and polished. i'm not
sure whether to get twin sidedraft 40s or 45s (would 45s be too much carb
for the engine?). i also want to put extractors on. should i do this first
before changing the carbies? and if so will a 2 and a quarter inch exhaust
be enough.
any help you can give would be appreciated.
craig
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