440 thermostat?

[Sonny]

This is the water pump I have from Jegs. Wondering if I should upgrade to a Flowkooler brand with fins?

 

[themechanic]

FlowKooler fixed my problem. If it doesn't work for you then the problem is somewhere else.

 

[wyrmrider]

the jegs should work fine that impeller is better than fins
get high flow stat

 

[Sonny]

the jegs should work fine that impeller is better than fins
get high flow stat

Update. Since my last post I’ve:
Added overflow tank.
Added EMP thermostat.
Added flowkooler pump.
Added lower Radiator hose internal spring.
Added 14 1” holes with flappers to shroud.
Tried water wetter with distilled water.
Used foam to seal radiator to rad support.

And nothing. Maybe 2 degree drop on highway. Idle to 25 mph- 195 degrees
Over that on hwy at 70mph- 208. Only 84 degrees outside.
Possible causes?:
-My (2) 1320 cfm fans too small (12” pullers with 95amp alternator). Temp does come down from 210 to 195 but only when at idle so the fans are working better than high speed air flow.
- my 727 trans has a 2000 stall converter with 3:55 gears. Engine rpm is 3200 at 70 mph. Should I have a trans cooler?
-air fuel ratio is 13 at cruise so not lean.
-timing is 18-34 so not too advanced.
-using ported vacuum advance. Timing is 44 degrees in park at 3000 rpm when hooked up.
Any suggestions???

 

[wyrmrider]

core support completely sealed
spoiler or valance under the core support
oil cooler
larger ps cooler
trans cooler in radiator?
get it out and use Borg Warner Canada 100 plate cooler NOT TUBE AND FIN
1/2 inch in and out and use half inch oil proof hose to and from the trans throw a filter (transdapt adapter and full size filter) on the converter to cooler line
what' wrong with 195?
anyone like header wrap?
cold air to the carb

 

[Sonny]

core support completely sealed
spoiler or valance under the core support
oil cooler
larger ps cooler
trans cooler in radiator?
get it out and use Borg Warner Canada 100 plate cooler NOT TUBE AND FIN
1/2 inch in and out and use half inch oil proof hose to and from the trans throw a filter (transdapt adapter and full size filter) on the converter to cooler line
what' wrong with 195?
anyone like header wrap?
cold air to the carb

The 195 isn’t the problem. It’s the 210 on the hwy that causes pinging and low oil pressure (under 7psi at idle). I live in Florida so if it’s 210 at 83 degrees what will it be at 95?
I’m considering the plate type trans cooler. Should I bypass the radiator all together?

 

[Dennis H]

180 Stant Super Stat. Standard.

 

[Sonny]

180 Stant Super Stat. Standard.

So tell me how this one is better than the Milodon hi flow 180 and the EMP Stewart High Performance Thermostat 180?
thanks!

 

[Timmayy]

An old hotrodder from back in the day told me to drill a couple of small holes along the outside of the thermostat to add to the cooling flow. He said even if the thermostat fails I would still get some flow to prevent major overheating. I've done it in the past. Just my 2 cents.

 

[khryslerkid]

An old hotrodder from back in the day told me to drill a couple of small holes along the outside of the thermostat to add to the cooling flow. He said even if the thermostat fails I would still get some flow to prevent major overheating. I've done it in the past. Just my 2 cents.

Mainly drilling a couple of small holes in the T-stats flange helps with any air lock in the system.

@Sonny what water pump housing do you have? Some of the early aluminium aftermarket housings had a flow problem. I'd have to research this again to refresh my memory.

 

[khryslerkid]

This is the water pump I have from Jegs. Wondering if I should upgrade to a Flowkooler brand with fins?
View attachment 966298

Here's one thread on the housings and pumps back a few years.

https://www.bigblockdart.com/forum/showthread.php?16174-440-Source-Water-pump-housing-MUST-READ!!!

When researching pumps (and I am using a stock housing) I found that the eight blade for AC was the best and that's what I used. There used to be a UTube vid on what pumps worked the best and the eight blade came out on top.

You can have your radiator cap off and watch for the t-stat to open when you first start the car cold. There will be coolant flowing across the tubes from one side to the other when it opens. Give it some throttle and it should increase to a really good flow.

The other thing that was already mentioned is the electric fans causing turbulence at highway speeds and actually blocking airflow. I've read this before.

 

[Mike67]

Others may have already stated but the temp rating on a t-stat is just the temp that it opens. It does not mean it's operating temp.
Living in SE Texas I ordered a high flow 160, as I don't see colder weather and need the engine to warm up before opening. I'm sure my engine will get to operating temp quick enough.
From what I've been reading the high flow stats have stiffer springs to counteract the higher pressures at higher rpm.

 

[Demonic]

Nice looking 8 blade pump. Where did you find that one?

 

[Sonny]

Mainly drilling a couple of small holes in the T-stats flange helps with any air lock in the system.

@Sonny what water pump housing do you have? Some of the early aluminium aftermarket housings had a flow problem. I'd have to research this again to refresh my memory.

It’s from 440 source but the site listed these as new and retooled since previous housings had a smaller intake orifice.

 

[khryslerkid]

Nice looking 8 blade pump. Where did you find that one?

If you're asking me I probably bought it from NAPA

 

[Sonny]

The 512 inch big block in my car stays in the 180 to 190 range with a premium Stant 180 thermostat. I do have a Stewart sitting on the shelf if I need it but so far I've never needed it. I have a stock Cordoba radiator in my Duster with a factory shroud and the big 7 blade fan with the clutch so that probably helps. I also run a lot of timing advance at idle and cruise which helps keep the engine temps down.

How much initial timing?

 

[wyrmrider]

tin pumps work much better with a plate
less cativation
take less hp
will rev higher before cavitation

 

[CompSyn]

FlowKooler sells Robert Shaw T stats for less. 370-160 here $24.99 just installed with Flowkooler high flow water pump. Waiting o temps to rise to test it out.

https://www.flowkoolerwaterpumps.com/collections/thermostats?_=pf&pf_t_make=make:dodge

$9.50 Clearance - https://www.summitracing.com/parts/bra-370-160/make/plymouth

 

[themechanic]

View attachment 972956 View attachment 972957
Update. Since my last post I’ve:
Added overflow tank.
Added EMP thermostat.
Added flowkooler pump.
Added lower Radiator hose internal spring.
Added 14 1” holes with flappers to shroud.
Tried water wetter with distilled water.
Used foam to seal radiator to rad support.

And nothing. Maybe 2 degree drop on highway. Idle to 25 mph- 195 degrees
Over that on hwy at 70mph- 208. Only 84 degrees outside.
Possible causes?:
-My (2) 1320 cfm fans too small (12” pullers with 95amp alternator). Temp does come down from 210 to 195 but only when at idle so the fans are working better than high speed air flow.
- my 727 trans has a 2000 stall converter with 3:55 gears. Engine rpm is 3200 at 70 mph. Should I have a trans cooler?
-air fuel ratio is 13 at cruise so not lean.
-timing is 18-34 so not too advanced.
-using ported vacuum advance. Timing is 44 degrees in park at 3000 rpm when hooked up.
Any suggestions???

I did not go back and read the entire post or search but have you tried the internal spring in the lower radiator hose?

 

[themechanic]

$9.50 Clearance - https://www.summitracing.com/parts/bra-370-160/make/plymouth

Now they go on sale after I forked over $25 bucks.