[Zmagnette] Stub stacks

[Wayne & Isabel Hardy]

Properly shaped inlet pipes smooth out the flow and encourage increased flow of air into the carb mouth. More air means you can run richer and that is more fuel air mix which is more bang in the motor. The APT designed ones work, (according to flow meters) and increase air flow into the inlet hole. Smooth tapered inlets are the way to go.Take it from someone who spent 20 years measuring flows of gases through a pipe for a living.

Wombat

From: Richard Greenberg 
Sent: Wednesday, November 13, 2013 11:33 AM
To: List for the Z Magnette Group - North America 
Subject: Re: [Zmagnette] Stub stacks

What is a stub stack? Would it allow for a filter that lies closer to the engine than a regular pancake filter? 

On Nov 13, 2013, at 9:53 AM, Allen Bachelder wrote:


  I've always just used the item #54 from the Moss catalog: http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=28996#top  Are these from APT or Rimmer better? 

  Always anxious to learn...
  Allen

  **************************************************************** 
  Allen & Florrie Bachelder       =iii=<
  Spring Creek Home for Wayward MGs
  '57 ZB, '65 B, '69 C/GT, '73 B/GT
  North Street, MI 48049, USA
  http://www.mgexperience.net/member/bachldrs 
  ****************************************************************

  On Nov 13, 2013, at 4:10 AM, monster at caverock.net.nz wrote:


    Hi everyone,

    I'd like to get a pair of 1.5" H4 stub stacks and I've tried emailing Steve Ash several times to see if he would make some more, but I haven't got an answer from him.

    So... from a light scour of the internet there appears to be two types available at a reasonable cost:
    $32.50 ea - http://www.aptfast.com/ShowItem/101221%20Billet%20Alloy%20Stub%20Stack%20SU%20HS4.aspx
    $57 pair - http://www.rimmerbros.co.uk/Item--i-RL1396ALT

    I've excluded the K&N ones as they are very rough, by all accounts.
    Are there any others that people would recommend?

    They're going to fit inside K&N filters that are 2 1/8" thick.

    regards,
    -- 
    Robert (in NZ)
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