[Fot] FW: TR6 Cannon Intake Manifold

[Van Mulders Marcel]

Thanks to the Fot members for their reactions : most are warnings that
triple 45 Webers may be too big on a TR6 engine. But it is a race engine
(2720cc) and the owner has already bought 3 good secondhand 45 Webers with
identical progression holes : 36mm main venturi's seem  to be a reasonable
starting point in this case? If necessary, he can go down to 34mm in 45
Webers.
 I've seen TR6 racecars with 45 Webers and I wonder if the Cannon manifold,
with 40mm diameter bores on the carburetor side, can be reamed to 45mm? 
Another question : the valve seat pressure on my TR4A racecar is 35 kgs/77
lbs. I've also a cylinderhead with only 25 kgs/55lbs seat pressure. The
springs on both cylinderheads are 5.25kg/mm (290lbs/").
Do you think 25kgs seat pressure is enough?
Marcel
 

  _____  

Van: Van Mulders Marcel [mailto:van.mulders.marcel at telenet.be] 
Verzonden: woensdag 9 september 2015 17:32
Aan: 'fot at autox.team.net'
Onderwerp: TR6 Cannon Intake Manifold


I have to install triple  Webers DCOE 45 on a TR6 engine. The owner has also
provided a Cannon one piece intake manifold with balance pipes. The bore of
the runners is 40mm on the carburettor side and 31.5mm on the cylinderhead
side.
Can these runners be reamed to 45mm/34mm? If not, are there other inlet
manifolds available?
Marcel.
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