[Healeys] Exhaust fitting

[David Nock BCS]

Years ago when my kids were young. I modified a top header rail with a 3” high air deflector on it so they could sit in the back seats. We were unable to drive the car at any speed. The exhaust coming into the car as soon as we started to go was so bad I had to remove it with in the first couple of miles.


David Nock
British Car Specialists
209-948-8767
www.britishcarspecialists.com

From: Stephen Hutchings 
Sent: Monday, March 08, 2021 12:04 PM
To: David Nock 
Cc: David Nock ; Healey Mail List 
Subject: Re: [Healeys] Exhaust fitting

Thanks David,

This is very interesting to me, having become obsessed by controlling this phenomenon over the years. 
I don’t doubt your advice at all, but do you know whether anyone’s ever really studied this?
I mean, something like a wind tunnel test, or the equivalent.
It’s a bit long winded trying to test drive various lengths, with just your nose as a gauge! 
Of course, the wind direction can also make a big difference, especially at slow speeds.

Stephen 



  On Mar 8, 2021, at 2:23 PM, David Nock <healeydoc at gmail.com> wrote:

  Maybe an 1-2 inches past the bumper at that max not including the bumper guard.



  David Nock
  healeydoc at sbcglobal.net
  209 948 8767
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  From: Stephen Hutchings via Healeys 
  Sent: Monday, March 08, 2021 8:43 AM
  To: David Nock 
  Cc: Healey Mail List 
  Subject: Re: [Healeys] Exhaust fitting

  So, what have you found to be the optimum distance? I had been told to get them past the bumper, which I did…but maybe too far? 

  Stephen, BJ8



    On Mar 8, 2021, at 9:58 AM, David Nock via Healeys <healeys at autox.team.net> wrote:

    You have to be very careful extending the pipes. If they are to far past the muffler the exhaust will be pulled back int the cockpit 

    David Nock

    Sent from my iPhone


      On Mar 7, 2021, at 8:18 PM, Bob Spidell via Healeys <healeys at autox.team.net> wrote:

      ps. The fumes you're smelling might be coming from the end of the exhaust; if the tip doesn't extend past the rear bumper they can 'curl' back into the cockpit.


        On 3/7/2021 8:02 PM, Bob Spidell wrote:
        I've had success sealing gaskets and small leaks with high-temp silicone. Edd China used to use some kind of blue paste, but haven't seen any like it around here.

        Bob


          On 3/7/2021 4:52 PM, Stephen Hutchings via Healeys wrote:
          Hi Folks,

          After many years of service my old stainless exhaust system has had it, and I’ve decided to replace it with another stainless system.
          I wonder if any of you have some tips/tricks for getting a good gas tight fit at the joins.
          I’ve had my car for 45 years and I’ve struggled many times with controlling fumes. I’ve recently replaced the manifold gasket, made up down pipe gaskets out of Remflex ( a graphite exhaust gasket material that compresses), lengthened my old tail pipes, and carefully checked and sealed the firewall.
          It’s become a bit of an obsession for me, so, since I’m starting with a new system, I’m hoping to see an improvement.

          Suggestions?

          Thanks,

          Stephen, BJ8
          _______________________________________________



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