john gillis wrote:
>
> My brother owns a 63 TR4. The car tended to pink alot even on a flat road
>under
> light load. It had been set up for classic car racing events with bits and
>pieces
> Can anyone suggest why this should happen, so I can sort it
> before it does some real damage to the engine.
There is an old mechanic's trick to determine if the problem is related to
carbon in
the cylinders. Get a pump spray bottle, fill it with water, and with the
engine
fully warm and the idle up (1500 rpm or so), spray water, a little at a time,
into
the carburetor intakes, but try not to let the engine die in the process. Do
this
until you've run a few ounces of water through the cylinders. Then go out and
run
the car at the points where the pre-ignition started. If it's gone, you've
probably
got some carbon build-up in the cylinders. If the problem comes back quickly,
then
you may have some de-coking to do. If that procedure does not create a change,
try
a set of plugs one step colder; if the car will still idle okay, then it may be
that
one of the modifications done to the engine that you couldn't take off was a
head
shave.
Cheers.
> John Gillis 1954 TR2 (in bits)
> Trinity College, DublinAnd, cheers to all of those in the old country (still
>have relatives in Donoughmore)
--
My other Triumph doesn't run, either....
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