[Tigers] Tiger Overheating – Shotgun Approach

Tue Jun 18 10:41:10 MDT 2019

I'm betting you have more than stock HP.
 Regardless, you mention that when you are moving car stays cool, but heats up when idling. This seems to indicate that if air is moving through radiator that you can stay cool.  You didn't mention installing an electric fan in front of the radiator.  This would give you moving air through the radiator even when idling. You can set up with one large fan or 2 smaller ones.  Get a sending unit that will turn them on whenever you want.....180 degrees, 190, etc.  Would also ask others what they have done to use the stock fan shroud with the Griffin radiator. I think people have found the solution for that.  Sounds like you have a solvable problem.Mark L.In a message dated 6/18/2019 12:08:07 PM Eastern Standard Time, tigers at autox.team.net writes:
After about a year of struggling with overheating at idle with the hood down, I took drastic steps.  I have been driving the car during the last year only on back roads with no chance of traffic lights.

   - Purchased and installed SS gloss black radiator overflow tank.
   - Purchased and installed overflow tank straps from Alexander Washick alw6464 at gmail.com which are powder coated.
   - Purchased and installed undersize water pump pulley from Robert Straghan <rgstraghan at yahoo.ca> scuffed, primed and painted semi gloss black
   - Purchased and installed horn hole block plates from Don Lutjen <dlutjen55 at gmail.com> scuffed, primed and painted semi gloss black.
   - Purchased and installed new taller Tiger aluminum cross flow side tank radiator from Griffin Radiator.
   - Purchased and installed new Flow Kooler water pump BRA-1680 painted Ford dark blue to match engine replacing SS water pump, pressed hub to line up.
   - Modified the mechanical fan spacer so that front of fan is 1” from radiator.
   - Mechanical fan remains Flex-a-lite 14” nylon 6 blade fan.
   - Purchased and installed new SS lower radiator and overflow to radiator hoses.
   - New top radiator hose from local source as SS hose would not fit taller radiator.
   - New fan belt.
   - Purchased and refurbished original Tiger fan shroud which would not fit as I did not want to cut a original shroud top mounting bracket to fit my taller radiator.  Stripped, primed and painted used shroud semi gloss black – sitting on shelf.
   - Installed 160 degree thermostat.

So at this point I do not have a fan shroud – unless make up a custom.  Other changes could make is front air dam and block front cross member to bottom of radiator spacing but for now I am going to see how things play out this summer.

Results as follows:

Cold start with 86 degree ambient outside temperature – at idle with hood closed, car in sun.

5 Minutes engine temperature 174 degrees.

9 Minutes engine temperature 180 degrees.

12 Minutes engine temperature 190 degrees.

14 Minutes engine temperature 195 degrees.

16 Minutes engine temperature 200 degrees.

Run the motor at 1500 rpm’s for 1minute temperature drops to 196 degrees.

Run the motor at 2000 rpm’s for another 1minute temperature drops to 194 degrees.

Turn motor off and in a total of 27 minutes from startup - heat soak is 208 degrees.

All this is recorded from temporary mechanical temperature gauge located under dash.

The car temperature at any speed is at 174 degrees regardless of the outside ambient temperature from 50’s to mid 90’s.

Whew, maybe at last can enjoy car with a couple of things still outstanding to be able to drive it out of town for any distance.  The Tiger’s first major outing was at the Sandhills Motoring Festival held in Pinehurst NC last month in May – you can get a glimpse of the cars at:  https://www.thepilot.com/gallery/concours-in-the-village/collection_d49fdacc-8091-11e9-86df-2b8021a08259.html  You might have to copy and paste link into your browser.

Thank you all for putting up with all my inane questions and comments over the years.  I am sure there will be more.

Regards

Joel Martin

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