Henry,
Happy New Year to you also!
I have a very similar system to yourself as you described. I too fitted a
bleed port on the thermostat housing to minimize air in the system. I am
sort of wondering now why no one has looked at designing an extended filler
neck arrangement to replace the thermostat housing? Maybe this will fix the
2 glaring issue with the current stock setup of too low a fill point and air
bleeding? I started thinking about this option today when I sat down and
looked at all the components etc. I would need to fit a recovery system.
Maybe the filler neck will do the job nicely and save allot of plumbing!
Cheers.
From: Henry Frye [mailto:henry@henryfrye.com]
Sent: Friday, 1 January 2010 9:06 PM
To: Peter Vucinic
Subject: RE: [Fot] TR4 Coolant System Expansion/Recovery
Peter,
I don't think there is a concensus on coolant system plumbing. I have seen
successful installations that range from what appears to be quite stock to
much more radical approaches than you are describing.
I guess it all depends on how much power you are making and how hard you
drive it.
I make as much power as the rest of the fast TR's in the east and mid-west
USA, and drive very hard. Fastest and first in class TR4 at the Kastner Cup
race in 2008 at Watkins Glen. Here's what I do...
I block off water passages in the front of the head to direct more flow to
the back of the block, run an oversized radiator with a stock recovery
overflow bottle, a 16 pound radiator cap, no expansion tank and have plugs
in the heater box tap and heater pipe outlet in the water pump. I installed
a petcock in the thermostat housing to purge air from the system when
filling, and run a 185 degree thermostat to keep enough heat in the engine
no matter what season I am racing in. Works great.
I know it's old news for you guys down under, but Happy New Year!
Henry Frye - Sent from Phone
Triumph Technology Consultants
860.508.3118 (C) - 860.653.3118 (O)
-----Original Message-----
From: Peter Vucinic <pvucinic@netspace.net.au>
Sent: Friday, January 01, 2010 6:01 AM
To: FOT@autox.team.net <FOT@autox.team.net>
Subject: [Fot] TR4 Coolant System Expansion/Recovery
Lister's,
I believe that we have already seen a few threads on this subject. But I am
seeking general consensus on the plumbing/routing of coolant lines to and
from a coolant system recovery/expansion tank/bottle for the TR4.
Obviously I am making the following assumptions: -
1. Expansion/recovery tank will be mounted higher than the cylinder head.
Say, on the firewall next to the battery
2. Existing Radiator cap to be of the fixed/closed type
3. Coolant system over pressure will now be controlled by radiator cap
fitted to expansion/recovery tank
4. Coolant total loss will now occur at the expansion tank due to over
pressure
My questions are: -
1. Are any of you already running a system such as the above? Successful
in controlling air into the coolant circuit/system?
2. Where is the most appropriate connection to the coolant expansion
recovery tank made? E.g. At the heater tap port and the back of the water
pump? Thermostat housing? Radiator top hose/port?
3. Do you have an air bleed orifice/port in this cooling circuit/system
as well?
Thanks in advance
Kind Regards
Peter Vucinic
TR-4
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