> Jeff and friends at Motorhead recently wrote:
>
> >> For instance, stock MGB air filter housings (63-74) contain a velocity
> stack insert which encourages flow. The Ramflo, K&N and other aftermarket
> air filters do not contain a velocity stack. It is possible that this insert
> as well as the capacity of the stock housing play more than a subtle role in
> air flow to the carburetters.<<
And Keith Baer asked:
> What do you recommend when the stock filters can't be used. For example, my
> '57 MGA has an early B (18G) engine which might prefer to breath through
> stock air filters. However, there is no way to fit those big mushrooms under
> the hood. The DPO used "MGA-like" flat filters (I think they're really
> Volvo), but I wonder if there's a better way.
>
> Other MGA owners with B engines? Do most use standard MGA air filters,
> K&N's, or others with no built-in velocity stack?
Actually K&N really DO make a Stub Stack, which fulfills the same
function as the one in the stock air cleaners, that is to smooth the
air flow into the carb mouths. The SU HS-6s on my '67 MGB-GT breath
fresh, cool air through an inverted '73 Volvo air box which is plumbed to that
tiny
little hole in the bulkhead, next to the radiator. I use a pair of
the K&N Stub Stacks to clamp the air filter box to the carbs. I really don't
think you could fit velocity stacks long enough to create a ram effect at an
RPM range which would be of any use to a street driven engine. I also
suspect that siamesed intake ports cannot be effectively ram-tuned
anyway.
Regards,
Jerry Causey
I'll never be a DPO, 'cause my MG is my Last Car.
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