[Healeys] BJ8 Temps

[BJ8Healeys]

I had mine Jet-Hot coated in 1999, and also didn't see any significant effect on the engine temps.  They surely looked a lot better than the old rusty manifolds and have held up really well over that time and about 80K miles.  Some browning is beginning to show at the sharp edges, but I think I have got my money's worth out of Jet-Hot and if I ever have a reason to remove the manifolds I'll probably get them coated again.

 

I've never wrapped the downpipes.   The new radiator core and the sleeved thermostat together have solved the engine heat problem, so I see no need to wrap them.

 

Steve Byers

HBJ8L/36666

BJ8 Registry

AHCA Delegate at Large

Havelock, NC  

 

 

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Bob Spidell
Sent: Monday, September 04, 2017 3:38 PM
To: healeys at autox.team.net
Subject: Re: [Healeys] BJ8 Temps

 

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  <mailto:healeys at autox.team.net> <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 

 

 

 

  _____  


 <http://www.avg.com/internet-security> Image removed by sender. AVG logo

This email has been checked for viruses by AVG antivirus software. 
www.avg.com <http://www.avg.com/internet-security>  





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20170910/0ae7d0a1/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ~WRD348.jpg
Type: image/jpeg
Size: 823 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/healeys/attachments/20170910/0ae7d0a1/attachment.jpg>