[Tigers] Overheating - May 3 test

Thu May 3 16:41:40 MDT 2018

HEAD GASKET

On Thu, May 3, 2018 at 11:03 AM, Joel Martin via Tigers <
tigers at autox.team.net> wrote:

> Still trying one thing at a time.
>
> Parts used:
> Carb is a Holly 4160C part number 0-80457S, main jet .064 with RED
> accelerator pump cam
> Distributor AI65 Petronix for Ford dual point distributor with VAC advance
> AI58PT Petronix coil
> SS - AI51T Tiger distributor cap for correct look
> MSD 6AL mounted in trunk
> Motorcraft spark plugs BSF42C
> SS - TM32 water pump - aluminum type
> Custom LAT hood with large hood scope in front of radiator
> Oversize recored cooper/brass radiator - about 5 inches taller than stock
> No expansion tank
> Custom made fan shroud
> Fan 14" 6 blade
> Fan spacer places fan 1- 3/8" from radiator
> Fan sits 1/2" INSIDE from back of shroud
> 2 - 8" electric fans - not used on this test - manual off/on switch
>
> Test:
> 160 degree thermostat starts to open on stove at 165, fully open at 175 -
> 1/8" hole drilled
> Outside temp about 65 degrees
> Cold car - jack up front of car to top of floor jack
> 13 pound radiator cap
> Pull intake manfold to heater valve hose into bucket to bleed any air
> Reattached heater valve hose - about 1 pint allowed out of hose
> Remember both heater valve hoses are plugged due to 3 leaking heater valves
> Top up radiator with water.
> Petronix distributor is pulling too much vac when attached so the vac line
> at distributor was removed and plugged with a golf tee
>
> Timing with vac advance line pulled and plugged is
> 14 degrees at idle 950 rpm's
> 25 at 1500
> 27 at 2000
> 29 at 2500
> 30 at 3000
> Consensus is: this a little slow but would not cause overheating.
> Different opinions from the knowledge folks on when, how fast and max with
> vac adv on and vac adv off or not use vac adv distributors at all.
>
> Timing with vac advance attached is:
> 16 degrees at idle 950 rpm's
> 27 at 1500
> forgot to record at 2000
> 53 at 2500
> 57 at 3000
> This is way too much based on discussion - so for this test and future -
> vac adv is removed and plugged
>
> Closed hood and went for a drive at about 35-40 MPH - still in
> neighborhood - highway about 3.5 miles away - too chicken to get too far
> from house.  Maintained 3000 rpms in second or third.
>
> Temperature stays at about 190 degrees while moving starting out
> Stop for less than 30 seconds - temperature goes up to 200
> Drive at speed again temperature goes down about 2 degrees
> Stop before going back into garage for less than 30 seconds - temp goes up
> to 210
> Shut off car
>
> Some coolant out of overflow tube (after heat soak kicks at about 225),
> none from drive as no coolant trail down driveway and into garage and
> probably leaking from thermostat since I pulled and tested.
>
> Radiator temperatures with infared gun immediately after shutting off
> engine.
> Upper radiator tank:
> Drivers side - 211 degrees
> Middle - 213 degrees
> Passenger side 207 degrees
>
> Radiator LOWER as shot from front around badge bar:
> Drivers side - 198 degrees
> Middle - 196 degrees
> Passenger side 197 degrees
>
> Radiator MIDDLE as shot from front around badge bar:
> Drivers side - 181 degrees
> Middle - 204 degrees
> Passenger side 200 degrees
>
> Header temperatures:
> Passenger side number 1:  359
> Number 2: 327
> Number 3: 305
> Number 4: 312
>
> Drivers side number 5:  275
> Number 6: 297
> Number 7: 266
> Number 8: 281
>
> So with tested 160 degree thermostat with 1/8" hole and air out of system,
> I believe
> and vac adj hose removed and plugged, the same result of heating up 10
> degrees with each 30 second stop still in play.
>
> So air flow or water flow or timing(not perfect, would have to change
> weights in distributor and determine vac adv issue) or air fuel mixture
> (change primary jets to .066 and move to PINK pump cam at 30CC)
>
> Some school of thought:  fix or replace 200 mile distributor and make air
> flow changes changes first.
> Change out water pump - make and model
> Change out radiator to Griffin or Fluidyne stock style with larger surface
> space since I have room based on custom LAT option hood.  Then go with
> shroud and electric fan on engine side removing existing mechanical fan or
> keep existing mechanical fan and not use electric fan.
>
> What to do with custom shroud if keep the existing mechanical fan.
>
> Either way regarding fans, I would need an original expansion tank to go
> with a possible new radiator.
>
> Your ideas and thoughts are always appreciated.
>
> My head hurts and I am going large mouth bass fishing and beers before
> happy hour.
>
> Sincerely
>
> Joel Martin
>
>
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