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Bored&Stroked · 07-14-2020, 07:41 AM

There are also differences in the accelerator pump arms on the lower bases. The 48 does NOT have multiple actuator arm locations (for supposedly 'winter/summer' tuning), while the later 97s and the 81's do. The bases are specific to each version of carb (from the factory). The standard main jet sizes are also obviously different between the three versions.

When I build these carbs, one frequently finds mixed bases between 97's and 48's. Also, the lengths of the accelerator pump rods are different - frequently these are mismatched as well.

On 97's with more performance engines, I tend to use the 'outer' accel pump location, for more of a pump squirt earlier . . .

07-14-2020, 07:41 AM	#10
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,064	Re: Stromberg 97,81,48 what's the diff.? There are also differences in the accelerator pump arms on the lower bases. The 48 does NOT have multiple actuator arm locations (for supposedly 'winter/summer' tuning), while the later 97s and the 81's do. The bases are specific to each version of carb (from the factory). The standard main jet sizes are also obviously different between the three versions. When I build these carbs, one frequently finds mixed bases between 97's and 48's. Also, the lengths of the accelerator pump rods are different - frequently these are mismatched as well. On 97's with more performance engines, I tend to use the 'outer' accel pump location, for more of a pump squirt earlier . . .