[Zmagnette] Stub stacks

[Wayne & Isabel Hardy]

Do you have a clue as to when this article was done??? I have all the R & Ts 
ever published up til about 7 years ago and I can sure look up the article. 
I agree, it was a great mag when run by John Bond and his wife  Elaine but 
after CBS bought it  well I started to loose interest til I finally just 
quit after R & T and Car & Driver both came under the same ownership 
blanket.

Wombat

-----Original Message----- 
From: Arch Boston
Sent: Friday, November 15, 2013 3:37 PM
To: List for the Z Magnette Group - North America
Subject: Re: [Zmagnette] Stub stacks

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 at 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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