Many years ago when MGAs were new cars Road and Track Magazine did a DIY
article on a ram air set up. I no longer have the magazine. Not the same
thing as stacks but related. That was a terrific magazine in the 50's and
60's. Anyone else remember the article? Arch
Sent from my iPad
On Nov 15, 2013, at 3:55 PM, monster@caverock.net.nz wrote:
> On 16.11.2013 08:03, Allen Bachelder wrote:
>> The K&Ns are
>> slightly noisier than stock MGB air cleaners. I don't think that's
>> because they're less efficient. My guess is that they provide less
>> acoustic insulation.
>
> I'd agree with this - there is a lot of material in an oil-bath filter and a
> substantial metal container.
>
>
>> Kelvin - your point is well-taken. Are you saying that even if
>> everything else is spot-on, it's still not worthwhile to mess with
>> velocity stacks for those of us who spend most of our lives below 3500
>> rpm?
>
> Barney Gaylord has a section on stub-stacks at his website:
> http://mgaguru.com/mgtech/power/pp104.htm
>
> Interesting commments from one of the MGA crew:
>
> "Just been for a 25 mile drive to road test them, and the throttle response,
> in top gear particularly, is very noticeable over 2000 rpm. It makes the 40
> to 60 mph acceleration noticeably better and more fun to drive".
>
> Another had a book with figures for the factory installed stub
> stack/backplate on the MGB - made a 5% improvement and BMC were stingy with
> unnecessary parts!
>
> I would certainly agree that I wouldn't pop a pair of these on until you've
> got the ignition working well and SUs balanced, tappet clearances set etc.
>
> regards,
> --
> Robert
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