Cooling Modifications

[flyhalf]

@flyhalf also cured his automatic transmission heat issues, but, again, he is in an S550.

Link:

S550 - ITALIAN STANG BUILD :2018 MUSTANG PP1 10 SPEED Build Thread

If no one else is interested - I am. Got a kit car coming that sure would be sweet with a good 4 speedI am, I'm just looking at various options and at the moment don't have any cash to spend anyway. All my left over bucks went to an ABS braking system and a new rear brake kit. Running both...

trackmustangsonline.com

Contact me on IG @italian_stang
The solution is by pass the thermostat "little boiler" thing under the car. I can help you with what should work. Not plug and play but absolutely doable

 

[Junkyard Dog]

Here is the long and detailed thread by @Rodpwnz on cooling his S550 A10 automatic. Sorry it is on another site (mustang6G) but it is well worth reading.

10r80 custom thermostatic valve and cooler lines

Hi Everyone, Skip to "The Project" below for the why, the how and the actual project. I want to start by saying that I have learned a great deal through this forum and its members, so thank you to all who have provided information along the way. I would not have been able to start this, or...

www.mustang6g.com

I do not know how much of that applies to the S650.

Do you still need to do the internal bypass? Drop the pan, drop the valve body, remove the 190° internal thermostat and replace it with a bypass?

I am wondering if the S650 replaced the internal thermostat with the external thermostat 7H322?

If anybody knows the fluid routing on the S650 and how this all works and how it is different or the same as the S550, please chime in and let us all know.

 

[CobaltFilly]

This continually makes me so happy that I got the last year of the 6r80.

 

[Junkyard Dog]

Contact me on IG @italian_stang
The solution is by pass the thermostat "little boiler" thing under the car. I can help you with what should work. Not plug and play but absolutely doable

"Little boiler".

That is what I was thinking it was. I guess it warms up the fluid in to get it up to operating temperature more quickly?

That is on your S550 car, too?

 

[Junkyard Dog]

Get your holesaw out and open up the fan shroud as much as you can. There is some guidance in the DHR tech bulletin (you can find on here by searching). Swiss cheese that thing!

Link:

https://www.fordracing.com/content/dam/fordPerformance/motorsport/mustang-challenge/pdfs/MC-TSB-04-6-4-2024-Fan-Shroud-Modification.pdf

 

[flyhalf]

"Little boiler".

That is what I was thinking it was. I guess it warms up the fluid in to get it up to operating temperature more quickly?

That is on your S550 car, too?

Yeah. And unfortunate that creates massive issues on track. Cause no matter how big is the cooler the fluid is warmed up again before getting in the 10speed. So stupid.
my s550 doesnt have it. I made an internal bypass to ga e coolers running 24 7.
A setrab 640 is a good start. But u do have a side pocket too so you should consider 2 coolers if you go to the track a lot.

 

[Junkyard Dog]

OK, so the S550 has the little boiler heat exchanger, too, and flyhalf says bypass it (and consider two coolers for transmission).

This thread is helpful already.

EDITED, see next post.

 

[flyhalf]

OK, so the S550 has the little boiler heat exchanger, too, and flyhalf says bypass it (and consider two coolers for transmission).

This thread is helpful already.

Sorry I MEANT THE S550 DOESNT HAVE IT.

 

[Junkyard Dog]

Here is the long and detailed thread by @Rodpwnz on cooling his S550 A10 automatic. Sorry it is on another site (mustang6G) but it is well worth reading.

10r80 custom thermostatic valve and cooler lines

Hi Everyone, Skip to "The Project" below for the why, the how and the actual project. I want to start by saying that I have learned a great deal through this forum and its members, so thank you to all who have provided information along the way. I would not have been able to start this, or...

www.mustang6g.com

I do not know how much of that applies to the S650.

Do you still need to do the internal bypass? Drop the pan, drop the valve body, remove the 190° internal thermostat and replace it with a bypass?

I am wondering if the S650 replaced the internal thermostat with the external thermostat 7H322?

If anybody knows the fluid routing on the S650 and how this all works and how it is different or the same as the S550, please chime in and let us all know.

I sent an email to the guy at Richardson Performance in PA who did the Youtube video in post #9 at the link over at mustang6G in that post, asking him whether the S650 still has that internal thermostat, since we know we have an external thermostat on the Dark Horse and GT Performance Package.

I'll post here if he sends back an answer.

 

[flyhalf]

It shouldn't
Ps if it does have. We sell the bypass for $29
Speeditaliaracing

 

[Junkyard Dog]

It shouldn't
Ps if it does have. We sell the bypass for $29
Speeditaliaracing

I did not know you had a store. Neat products. Thank you for sharing it. Following your instagram page now, too.

You're right, though. It shouldn't. There would be no real reason to have two thermostats. This may make lowering the thermostat temperature a much simpler proposition, and maybe mounting it in the same location would keep the temperature closer to the rating instead of mounting it six feet away like Rodpwnz did with his solution.

 

[flyhalf]

I did not know you had a store. Neat products. Thank you for sharing it. Following your instagram page now, too.

Thank you. Im here if you anything. It is hard sometime to navigate through these topics. Alessandro

 

[Rodpwnz]

@Junkyard Dog - you said in another thread:

If I could figure out the fluid routing and temperature of that thermostat from Ford (I see you said 190°), I bet we could figure out how to do something similar in the S650 to what you did to the S550.

Maybe a lower temperature thermostat (165? 145?) and a larger cooler placed in the same location as the stock one, between the radiator and the a/c condenser?

Maybe bypass the heat exchanger altogether. I need to know more . . .

A couple of questions. You have an S550. Does it have this same thermostat, 7H322? Does the S550 have the heat exchanger down in front of the transmission, the 7A095B? Does the S650 need the transmission pan dropped and remove some internal thermostat like you did to your car?

To clarify, S550 does NOT have external thermostat 7H322 nor coolant heat exchanger 7A095B. I do not know if S650 has an INTERNAL thermostat, but it wouldn't make sense to if there is already external thermostat 7H322.

Please see S650 and S550 diagrams below to compare:









S550 has an INTERNAL thermostat(inside 10r80 valve body) set to 190F. S550 owners have to open up the transmission and valvebody to access and bypass the internal thermostat. On S650, it seems to be much different - you may only have to replace the EXTERNAL thermostat(7H322). It is important to verify that there is only an external thermostat.

The issue with the S650 is that you also have to contend with heat exchanger 7A095B. The heat exchanger is coupling the radiator/coolant temps to the transmission fluid temps, which is good for trans warm up but not ideal for keeping temps down or having a starting trans cooling temp below 180F/190F.

I believe radiator coolant thermostat is set to 190F. In order to completely decouple from the heat exchanger 7A095B setup in S650, you would have to attach something like this AN adapter to the ports coming directly from the 10r80: https://www.uprproducts.com/product...hCTLVbm7woDHHEIAp9EhdfyOo2qoICzoOLGXNwbVM27ou

And from that AN adapter directly on the transmission body, you would then fabricate custom AN cooler lines and install a new aftermarket external thermostat set to 140F or 160F somewhere between those custom lines and a new transmission cooler of your choosing.

Alesssandro and I both bypassed our S550 INTERNAL thermostat. I went with 165F(starts opening at 160F), Alessandro suggested to me 145F(140F open), and I think Alessandro doesn't use an external thermostat at all. He has bypassed the internal thermostat for his S550 and now has constant open cooler flow at all times.

 

[flyhalf]

To clarify, S550 does NOT have external thermostat 7H322 nor coolant heat exchanger 7A095B. I do not know if S650 has an INTERNAL thermostat, but it wouldn't make sense to if there is already external thermostat 7H322.

Please see S650 and S550 diagrams below to compare:
View attachment 111690

View attachment 111691






S550 has an INTERNAL thermostat(inside 10r80 valve body) set to 190F. S550 owners have to open up the transmission and valvebody to access and bypass the internal thermostat. On S650, it seems to be much different - you may only have to replace the EXTERNAL thermostat(7H322). It is important to verify that there is only an external thermostat.

The issue with the S650 is that you also have to contend with heat exchanger 7A095B. The heat exchanger is coupling the radiator/coolant temps to the transmission fluid temps, which is good for trans warm up but not ideal for keeping temps down or having a starting trans cooling temp below 180F/190F.

I believe radiator coolant thermostat is set to 190F. In order to completely decouple from the heat exchanger 7A095B setup in S650, you would have to attach something like this AN adapter to the ports coming directly from the 10r80: https://www.uprproducts.com/product...hCTLVbm7woDHHEIAp9EhdfyOo2qoICzoOLGXNwbVM27ou

And from that AN adapter directly on the transmission body, you would then fabricate custom AN cooler lines and install a new aftermarket external thermostat set to 140F or 160F somewhere between those custom lines and a new transmission cooler of your choosing.

Alesssandro and I both bypassed our S550 INTERNAL thermostat. I went with 165F(starts opening at 160F), Alessandro suggested to me 145F(140F open), and I think Alessandro doesn't use an external thermostat at all. He has bypassed the internal thermostat for his S550 and now has constant open cooler flow at all times.

When I went with double coolers I added a 130f and was perfection. I would suggest that now also for 1 cooler