Hi Philip
The function of the oil in the dashpots is to slow the lifting of the piston
which creates a smaller venturi and a higher air velocity creating lower
pressure above the fuel causing more fuel to be "sucked" into the air hence
a richer mixture for acceleration. On this basis the thicker the oil the
longer you retain the rich mixture the better the acceleration. Therefore
the "quicker response" is not relating to the acceleration merely to the
speed with which the piston rises conversely the "slower response" of the
piston will give better acceleration. Try putting some 90 grade oil in there
as I did, Say good by to your economy first! (only if you use that loud
pedal in the manner for which it was intended).
Yes it would be a good idea to empty your carbs and start from scratch! I
assume the car is running SU's at this point, if US spec was Strombergs add
one more screw, to do this simply undo the
three screws that hold the vacuum chamber to the venturi body and lift
carefully away, taking care not to bend the metering needle then simply
invert each one until all the oil falls out, carefully replace each one on
its respective body replace the three screws lightly tighten. With the air
filters removed insert your finger in the hole and lift the piston(before
adding the oil) let it fall, it should land with a "soft metallic click" to
quote the manual, if it doesn't there is a problem (investigate). Assuming
it does add your oil and enjoy!!!
Graham.
----- Original Message -----
From: Philip Haldeman <haldeman@accessone.com>
To: <triumphs@autox.team.net>
Sent: Sunday, January 30, 2000 12:31 AM
Subject: dashpot oil with a twist?
>
> No, not a twist of lemon. A twist of Marvel Mystery Oil? I just checked
> the dashpot oil (TR6) and found the front carb low, i.e. without
> resistance. I don't know what's in the dashpots now (purchased car 10
> months ago). Some kind of engine oil. So whatever I put in the front pot
> will mix with some stuff that's already there. Do I literally need to
> change the oil in both dashpots to create absolute consistency? If so,
> how? Or do I just add some to the pot that needs it? If so, what do I
> add?
>
> Is it normal for the oil to drop to "zero resistance" over a certain
period
> (I don't know how long it's been this way)?
>
> Also, the recommendations from the TR6 Page (printed below with apologies)
> mentions "faster" response vs. "moderate" response. Why would anyone want
> anything but a fast response? My apologies for so many questions all at
> once. . . .
>
> -For light damping (faster response):
> -Marvel Mystery Oil (very good for this application)
> -Automatic Trans Fluid
> -3 in 1 oil
> -For moderate damping:
> -20 or 30 w Engine Oil
> -20-50 wt Engine Oil
>
> Phil Haldeman
> '72 TR6, Emerald Green
> haldeman@accessone.com
>
>
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