Springs (beville washers) work better than the rubber thingies on webers--at
least you can remove and replace them more without needing new ones. They
probably don't damp like rubber does, but I think the hope of a little
rubber washer damping a massive carb is misplaced.
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On Behalf
Of Jack W. Drews
Sent: Wednesday, August 02, 2006 7:17 AM
To: fot@autox.team.net
Subject: Re: [FOT] Fuel Pressures
Good point from Ted about HS6's being better.
I have HS6's, as do most but not all racers. I did not have the problem on
my car until very recently. I used the rubber version of the little
positioning part that goes between the float chamber and the body. That gave
some shock absorbtion for the chamber. Then I experienced two complete
failures of the bolt that holds the float chamber on. I used grade 8 bolts,
Loctite, etc and still had the failures. My last round on this was to
replace the rubber doober, which I can no longer find, with the aluminum
one, which is quite common, and soft mount the whole carburetor. Problem
solved but it's more work. Some guys use the available Weber mounting plate
but you have to source the Weber plate from Moss and the springs and rubbers
from elsewhere which is inconvenient. I used the parts available in the UK
but which I also can no longer find. That part is an aluminum plate which
replaces the fiber insulator block, has big o-ring grooves and big fat
o-ring on each side, and then used the Weber rubbers under the studs. The
carbs are nicely floppy and I think the vibration problem is solved. I also
drilled out the 1/4" hole in the float chamber, for the attaching bolt, and
tapped it for 5/16". we'll see if that holds.
.
At 08:46 AM 8/2/2006, Ted Schumacher wrote:
>HS6 carbs usually solve the vibration problem. No more brass float
>inside a rigid mounted float chamber. Ted
>
>Jack W. Drews wrote:
>
>>Supporting Bob's solution, I know of four TR's that had this problem
>>during the last season -- breakup at about 5000. It is worse on cars
>>that have the engine mounted very solidly - that is, motor mounts that
>>have little cushioning. Four bangers have some bad vibes. The
>>vibrations from Offenhausers used to break the chassis.
uncle jack
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