In general, going to a larger exhaust system or one that flows more freely,
it reduces the back pressure in the exhaust system which in turn leans out
the fuel mixture going into the cylinders.
Now that you have the new exhaust on, re-adjust your carburetors fuel
mixture and this should likely cure your problem.
Matt
'70 1600
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Craig Odell
Sent: Wednesday, May 09, 2001 4:01 PM
To: datsun-roadsters@autox.team.net
Subject: What is different?
List,
I had a new exhaust system installed (from the manifold back). I had the
resonator removed and I increased the pipe diameter to 1 3/4". My 68 2000
was tuned and running well just before the work was done. Now the
car...well...feels different. It hesitates when cold and won't idle until
fully warmed up. When it is fully warmed it does run quite well, lots of
power and sounds good. But it just doesn't seem to be as "in tune" as it was
before. What would cause this? And what can I do to balance things out?
TIA
Craig Odell
68 2000
67 1600
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