The main problem is that you can't set Weber's for a wide range.
You can use a small chokes to rise torque and easy overcome the idle stage
or you can run large chokes to have max power.
For a road engine a 32mm choke I would suggest as max.
For racing a 36-40mm choke. The 36 for rally and the 40 for ovals.
I have a type 9 Weber and it does stumble at progression. I run a 55F8 idle
jet.
Use small injectors....like a 35 or 40 with a discharge jet of 50-70.
Hope this helps.
Cheers
Chris
-----Urspr|ngliche Nachricht-----
Von: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] Im
Auftrag von Peter Vucinic
Gesendet: Freitag, 2. Januar 2009 02:38
An: FOT
Betreff: [Fot] Weber DCOE 45's on TR4
Dear Lister's,
I am seeking those people who have had experience with 45mm WEBER DCOE's
fitted to TR3/4 engines.
Specifically those that have modified the progression circuit holes to
remove problems such as 'stumbling/hesitation' and having to run excessively
RICH idle jets to overcome 'stumbling/hesitation'. I suspect this issue will
more relevant to those of us who run road cars, rather than race. But it is
as equally relevant to those who race. It appears that the problem is found
with those of us running modern DCOE 152's with 78 Degree throttle plates.
But not limited to this model. DCOE 152's have three progression holes that
are all position FORWARD of the throttle plate.
When you look at the throttle plate position (remove progression hole plug
in top of carb), it is behind the first progression hole and NOT directly
over the plate. This means that when acceleration begins, the top of the
throttle plate, moves forward towards the ram tube/air cleaner side. The
throttle plate then covers the first progression hole as the throttle plate
moves forward.
My question is, has anyone drilled other progression hole(s) so that it/they
are positioned directly above the throttle plate?
I suspect the 'period' DCOE9's will have different progression holes and or
positions.
Kind Regards
Peter Vucinic
TR-4
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