UPDATE 2005-09-16, Carbs and exhaust
A
Finnish enthusiast (Thanks Pauli!) sent me a copy of the service manual
for the Saab triple carburetors. Much easier to plan the restoration
and also to make correct adjustments.
I hadn't actually realised there's three different setups of the long nose triple carbs:
Saab Sport, 1965.
Monte Carlo 850, 1966.
The
carburetor system and the carburetors are pretty simple, but there are
some significant differences between them, such as the fuel level in
the float chamber.
The second update concerns the exhaust system. My father is a member of the local motor sports club and he remembered a club meet some 40 years ago (!), where there had been a discussion about tuning rallysaabs! He made some notes back then and was certain that he still had them. It took days to find the notes, but now I have a basic plan for an adjustable expansion chamber!
Back
then,
some of the rallyteams used a system where you could adjust the position
of the diffuser cone within the expansion chamber (locking it in a desired
position only with a few screws), effectively adjusting the length of
the expansion chamber.
This made it possible to experiment with the expansion chamber quickly to get the best performance. The drawing above isn't in scale, but shows the idea.
I think I will make one just for the heck of it!