[Healeys] BJ8 Temps

[Bob Spidell]

FWIW, I just had the manifolds on my BJ8 Jet-Hot coated and haven't 
noticed much, if any, difference in running temps or other effects (I 
also wrapped my downpipes).  YMMV.

Bob


On 9/4/2017 10:05 AM, Al Fuller wrote:
>
> Roger:
>
> Have you considered coating the exhaust manifolds, so as to conduct 
> the heat down the exhaust system, as opposed to allowing the manifolds 
> to be their usual heat radiating selves?
>
> I’m still thinking a winter project will be getting mine coated 
> [Jet-Hot, etc.].
>
> Al Fuller
>
> al at bighealey dot org
>
> '65 BJ-8
>
> '85 Rx-7
>
> *From:*Healeys [mailto:healeys-bounces at autox.team.net] *On Behalf Of 
> *Roger Grace
> *Sent:* Monday, September 4, 2017 10:14 AM
> *To:* Healey List <healeys at autox.team.net>
> *Subject:* [Healeys] BJ8 Temps
>
> My BJ8 seems to perform better with the increased O2 of lower
>
> ambient temps in the evenings and mornings. There even seem to be fewer
>
> rattles squeaks and groans too !
>
> I have an oil cooler, electric rad. fan oil temp gauge and standard rad.
>
> Whenever I spend more than say 20 mins in traffic after the engine oil is
>
> already up to temp, the idling is impacted due to what must be due to
>
> increased engine compartment air temp, and the HD8 mixture becoming 
> too rich for that
>
> ambient.
>
> So I decided to do some crude testing, and installed a temp. pick up near
>
> the rear carb intake.
>
> In an ambient of around 85F and sustained cruising at around 60 MPH – 
> elec.
>
> rad fan off
>
> Water is 190F
>
> Oil is 165- 170F
>
> Engine compartment is around 130F
>
> At same ambient and elec. fan now on and after 25 mins idling in traffic
>
> Water is 200F
>
> Oil is 180 F
>
> Engine compartment is over 155F and idling has to be nursed to avoid
>
> stalling. This must be a build up of exhaust heat with no exit path.
>
> Have tried to compromise with mixture settings but not yet found a sweet
>
> spot.
>
> So l was wondering if anyone has tried to improve engine compartment 
> venting
>
> and how ?
>
> Assume this why some cars have louvers on hood or side of car.
>
> Ideas comments welcome.
>
> On a similar thread has anyone used the cold vent air to bring cooler 
> air to
>
> the carb intake area when cruising  ? Results ?
>
> rg
>
>

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