[Healeys] Exhaust fitting

[Stephen Hutchings]

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.
>  
>  
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> David Nock
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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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