: Hi Everyone,
: I just completed my conversion over to the
: Super six and Dutra Dual exhaust setup along
: with a new
: dual exhaust system. Everything went together
: great but, I suspect I may have a vacuum
: leak somewhere around the 'infamous'
: manifolds..!! The engine is lopping when I
: adjust the idle speed on the BBD. The carb
: was totally rebuilt by a great shop and is
: doing fine. Questions...What do you
: recommend I spray around the manifolds and
: carb to see if I can located the leak..??
: Also, should I look at re-timing..?? Please
: give me as many ideas or tips to begin to
: get the idle smoothed out..!! The car runs
: great under load and there is not apparent
: backfiring under compression... I installed
: the manifolds per Doug's recommendations and
: torqued all bolts per specs...Thanks for you
: comments.
: 66 Dart

: Any type of carb cleaner will do the trick, if
: you spray it on a leak area, you will hear
: the idle speed change.
:
: Also check the timing, try a few different
: settings to see if that helps any.
:
: Also try blocking the PCV valve / hose to see
: if that smooths-out the idle. I have seen
: these cause a lean / rough idle condition.
: If it still runs rough after blocking the
: PCV, try slowly closing the choke butterfly,
: a littly at a time. If there is a vacuum
: leak or other lean condition, you will find
: a place where the idle smooths-out with a
: partially closed choke flap.
:
: It could still be a problem inside the carb.
: but let's get through these tests first,
: then go from there.
: DD

: Thanks for the input guys...
: Doug, your duals went on great and the muffler
: shop did a beautiful job on custom making
: the exhaust system. I will have to get some
: digital pictures taken of the entire
: conversion and show them to you..!! I went
: out tonight and adjusted the idle speed to
: stay at approx. 800 rpm. It is still lopping
: and the rpm's flucuate up and down from 600
: to 800 to 1000 back down to 800 etc....I
: reset the timing down as low as I could to
: approx. 3 degrees btdc. I can't go any lower
: without pulling and resetting the
: distributor..!! I drove it for awhile and it
: pulls good when accelerating but definitely
: flucuates when coasting or decelerating..!!
: Sometimes when coming to a stop, the idle
: will be back up around 1200 and won't kick
: down..Maybe there is something still needing
: adjustment on the Carb..!! I will try
: blocking off the PCV valve and your choke
: idea and see what happens...Thanks again for
: you time and ideas..I'll let you know what
: happens...
: 66 Dart

: Thanks for the input guys...
: Doug, your duals went on great and the muffler
: shop did a beautiful job on custom making
: the exhaust system. I will have to get some
: digital pictures taken of the entire
: conversion and show them to you..!! I went
: out tonight and adjusted the idle speed to
: stay at approx. 800 rpm. It is still lopping
: and the rpm's flucuate up and down from 600
: to 800 to 1000 back down to 800 etc....I
: reset the timing down as low as I could to
: approx. 3 degrees btdc. I can't go any lower
: without pulling and resetting the
: distributor..!! I drove it for awhile and it
: pulls good when accelerating but definitely
: flucuates when coasting or decelerating..!!
: Sometimes when coming to a stop, the idle
: will be back up around 1200 and won't kick
: down..Maybe there is something still needing
: adjustment on the Carb..!! I will try
: blocking off the PCV valve and your choke
: idea and see what happens...Thanks again for
: you time and ideas..I'll let you know what
: happens...
: 66 Dart