- New 97 base with ported vacuum fitting
- Provides ported vacuum for your distributor
- All new and complete with throttle shaft and plates, kicker, choke lever and idle mixture screws.
- One one vacuum port required per engine.
- Not compatible with the 1949-53 Ford flathead Loadamatic distributor
A new 97 base (throttle body) with specially designed brass fitting to
provide ported vacuum advance for your distributor - complete with new
throttle shaft, bushes and plates, new kicker and choke lever, idle
mixture screws and springs and gaskets. Available only from Stromberg
Carburetor, it's the perfect swap-in for your current 97, adding that
all-important distributor vacuum port.
Please note, 'ported
vacuum' is taken from just above the throttle plate and therefore
provides no additional advance at idle or higher revs - only at light
load/part throttle conditions (cruising). Please check your distributor
specification. Simple ported vacuum will not work on distributors
designed and tuned to work with manifold vacuum. And not with the
1949-53 Ford flathead Loadamatic distributor, which has no static
mechanical advance and needs a special, compatible carburetor.
our part throttle/light load dyno tests, we set the RPM at 1800 and
locked the throttle position with the vacuum advance disconnected.
Connecting it raised the RPM to 2000 and the torque by 3 to 4ft-lbs. The
exhaust sound changed considerably, making it obvious that the engine
appreciated the extra timing, and throttle response was noticeably
Note: Always time the engine with the vacuum temporarily
disconnected (with the carburetor end clamped). A compatible
distributor will only need vacuum from one carburetor
like any carburetor part, the new Stromberg 97 base needs proper
installation and tuning for optimum performance. Help is available at
the Stromberg online Tech Center.