Good reply Chris, and thanks for the correction about the sleeves as I
probably had a bit of a brain fart.
Anyway, the hoses that KAMAN used to make my lines are indeed rated at
400-450 degrees and the hose manufacturer is Airquip. Once again, Chris is
correct on the sleeves, as they are very similar material to the fiberglass
plug boots used for headers. The only difference is that there is a
"metallic" looking coating over the fiberglass sheath. I use the sheath
where the oil hoses come in close proximity to the headers. I have had this
set-up for about two years with no degradation whatsoever. Keep in mind
though that my car is pretty much a toy or weekend car, so it gets some long
trips on weekends, but not much driving during the week.
Finally, when I went to KAMAN, I figured they knew a heckuva lot more than I
did about this kind of thing, and when I asked them about braided lines,
they shied me away from them because they felt the nylon/Teflon/rubber combo
would be better for my needs. Frankly, I would not have to go through all
of this had someone in the past kept the original stock oil filter mount
rather than relocate the oil filter adapter under the left front fender.
Thanks once again Chris for the clarification. In the future I will do as I
usually do, go out to the car and look rather than rely on memory. Can't
help if folks, guess that's what happens when you hit 45! :)
Allan
B9472373
-----Original Message-----
From: Koss, Christopher (GEAE) [mailto:christopher.koss@ae.ge.com]
Sent: Thursday, March 01, 2001 6:45 AM
To: Rose, Mark G; tigers@autox.team.net; 'Allan Connell, Jr.'
Subject: RE: Blown oil filter lines
My 2 cents regarding hose material temperature capabilities. I draw my
experience from designing hoses for aircraft engines. When I read the below
information I felt I should help clarify some things regarding the vendors
suggested temperature capabilities of hoses.
The current maximum recommended temperature range for PTFE (Teflon) cored
hoses is 450 Deg F continuous. The steel braiding is the industry standard
for aircraft engine applications and provides the highest pressure rating.
With regards to a 1000 deg F sleeve, there is no such thing. The additional
'firesleeve' or chafe guard that can be installed is a sacrificial covering
(which does degrade with temperature) that provides insulation for the
pressurized core. An example of this would be the spark plug wire boots and
the effect that headers can have on them with close proximity. They will
become charred, brittle and fall apart. And as the material gets degraded
the insulation effect will diminish. The moral of the story .... don't let
elastomeric products get too close to hot surfaces....they don't like it
!!!!!
Chris
> ----------
> From: Allan Connell, Jr.[SMTP:alcon@home.com]
> Sent: Wednesday, February 28, 2001 1:04 AM
> To: Rose, Mark G; tigers@autox.team.net
> Subject: RE: Blown oil filter lines
>
> Mark,
>
> First things first:
>
> When you have the lines made-up, I personally would NOT suggest the steel
> braided lines. Unfortunately, many of these types of lines are made up
> for
> show rather than go and have a very LOW heat rating. Rather, I would go
> to
> some company like KAMAN supply (no, I don't work for them, but I know they
> are national,) and get yourself some high heat rated hoses. The ones I
> had
> made for my car are rated at 600 degrees. On places they are near the
> block, or in my case, the headers, I have them sleeved with another hose
> material that is rated at 1000 degrees. Believe me, these guys know
> hoses,
> have all the fittings and the hoses they make don't leak. I don't know if
> your setup is stock, mine is not; they run past the headers into the
> driver's side front fender to a remote oil filter. In my case, I need
> these
> types of hoses. If yours is a stock setup, the braided hoses may work
> just
> fine.
>
> Regarding the radiator thermostat, keep in mind that Tom Hall, John Logan
> and others have noted two critical issues: 1) Ford recommends that their
> motors run the most efficiently and with the least wear at an operating
> temperature of 195-215 degrees, and 2) the standard rule of thumb is that
> if
> you are not puking coolant, you are not overheating. Personally, I would
> go
> with the 180 degree thermostat and see what happens. Many Tiger owners
> (IMHO) worry way too much about heat. Heat is a good thing as long as you
> don't consistently remain at over 230 degrees. Also, keep in mind that
> the
> gauge in your care is probably inaccurate, and it is a good idea to get an
> accurate read with a highly accurate measuring device to develop a good
> baseline of actually where you are as opposed to what your gauge reads.
> In
> my case, until I had it recalibrated, my gauge read 10 degrees too high.
> That's a lot when you are trying to differentiate between 220 and 230
> degrees. This was before I corrected a true cooling problem.....it WAS
> puking coolant.
>
> Regards,
>
> Allan
> B9472373
>
> -----Original Message-----
> From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net]On
> Behalf Of Rose, Mark G
> Sent: Tuesday, February 27, 2001 8:01 AM
> To: 'tigers@autox.team.net'
> Subject: Blown oil filter lines
>
> Well it was bound to happen. Now that I found out what the Tiger could do
> and adjusted my accelerator pedal to where I had WOT (with a little room
> for
> engine movement and making sure I wasn't pulling against the carb stop) I
> was out having a little romp. I wasn't even going that fast but had the
> rpms
> up and pow! in great cloud of white smoke, I blew up the remote oil filter
> hoses. We dumped almost all 6 quarts of oil in about 10 seconds. It looked
> like we were fogging the area for insects. Thankfully nobody was behind
> us.
>
> We shut off the engine and coasted into a gas station where the worker
> behind the counter watched us with suspicious glares at the "queer british
> car." Called a friend and endured the shame of having to be towed home.
> Unfortunately, the 'bowtie' man across the street was home as we pulled up
> and laughed as he continued washing his Chevy.
>
> Anyway, off to the custom hose shop this morning for steel-braided lines.
> The sad thing is I was just talking about needing to change the oil filter
> two days ago, but this is not the way I wanted to do it.
>
> While I had the radiator hose off, I pulled the thermostat to check the
> rating. It was a 160 degree unit. Knowing Oklahoma weather is fairly hot,
> should I go to 180 or keep the 160? The car has been running between 170 -
> 200 degrees but the temperature here has not been above 50 degrees the
> last
> several weeks.
>
>
>
> Thanks
> Mark
> B382000974
> 1966 - Mk1a
>
>
> Mark Rose
> Team Quest Learning Services
> www.OUropes.ou.edu
> mrose@ou.edu
> 405.325.0464
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