[Healeys] Jet-coating, wrap or do nothing to stainless headers?

[Oudesluys]

May be you should check the pressure delivered to the carbs. The 
pressure regulator may be set to low, hence vapour lock. You can also 
run a return fuel pipe/hose from the carbs to the fuel tank 
incorporating a restrictor to keep fuel in circulation and thus cool.

Kees Oudesluijs



Op 20-11-2015 om 0:01 schreef Richard Collins:
> It's a good idea. My BN7 has become almost impossible. To drive in the 
> summer except at speed on highways. Vapor lock is a huge problem 
> although my fuel lines are not all that close to the manifold, coming 
> into the front of the SU's via a regulator.
> I have a shield I hope to put on soon to help. Fall winter and spring 
> days are no issue.
>
> Regards,
> Richard C
>
>
> On Nov 19, 2015, at 11:43, "ATIGHTPROD at aol.com 
> <mailto:ATIGHTPROD at aol.com>" <ATIGHTPROD at aol.com 
> <mailto:ATIGHTPROD at aol.com>> wrote:
>
>> Heat and this ethanol fuel is a definite problem with my BN1 and I'm 
>> sure the same happens with BN2's also and from what Keith is saying, 
>> it seems to also affect six cylinder folks as well. From what I 
>> heard, a lower boiling point for the fuel has a lot to do with why 
>> the "vapor lock" symptoms occur.
>> This is how I solved my problem with that happening while stuck in 
>> traffic, starting up after sitting for a short time after a hot run, etc.
>> This is a marine bilge fan I got off ebay, painted flat black and 
>> wired in next to my radiator for easy removal and no holes drilled. 
>> 3" flex off both sides, front goes to right behind grille and sucks 
>> cold air in. Rear goes right to front float bowl.
>>
>> <IMG_2579.JPG>
>> Better view of install. Simple. My car is a driver and I had a 
>> terrible time with these new fuels, so the sight of the install 
>> doesn't bother me as it solved all those problems.
>>
>> <IMG_2580.JPG>
>> The 3" flex is bent and pulled right to the float bowl. If I sit, I 
>> turn the fan on from a switch inside the cockpit and let it run for 
>> about 30 seconds before firing up and now problem. When stuck in 
>> traffic, flick the switch and instant cold air stops vapor lock. When 
>> going down the road, flip the switch and the fan turns off.
>>
>> Steven Kingsbury
>> BN1 #598
>> In a message dated 11/15/2015 8:15:42 A.M. Pacific Standard Time, 
>> mottman55 at gmail.com <mailto:mottman55 at gmail.com> writes:
>>
>>     This is a really interesting survey, but what about paint?  I
>>     have a set of mild steel headers that I plan to put on a bugeye
>>     I'm restoring.  I don't really want to leave them bare, and I was
>>     planning on painting them with high-temp paint.
>>
>>     On a slightly different note, my experience with heat and rough
>>     running in my BT7 is exactly the same as Bob's.  I have come to
>>     accept that it is 'normal' behavior for these cars although I've
>>     always wondered about wrapping the the exhaust manifold to
>>     decrease the heat load on the carbs.
>>
>>     Keith
>>
>>     On Sun, Nov 15, 2015 at 3:11 AM, Simon Lachlan
>>     <simon.lachlan at homecall.co.uk
>>     <mailto:simon.lachlan at homecall.co.uk>> wrote:
>>
>>         I have stainless headers going down into a big bore(?) exhaust.
>>
>>         Opinions seem to vary as to the merits of wrapping, coating
>>         or doing nothing to them .
>>
>>         I have Webers above them, but I suspect, in my ignorance,
>>         that these are maybe less prone to evaporation issues than SUs.
>>
>>         What does the panel think?
>>
>>         See attached for a well researched synopsis. (Not by me!)
>>
>>         Simon
>>
>>
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