Tested and Ready 70° and 75° Thermostat

[0-60motorsports]

Hi,

My suggestion is in such hot environment getting 75C is
waist of time. If its my choice I would go with 70C for sure.

I will sent you PM back.

Thanks,
Anri

Thanks Anri. I wanted to go for the 75c because that should be good enough for the cooler weather too.

[Anri]

Thanks Anri. I wanted to go for the 75c because that should be good enough for the cooler weather too.

Okay sure. This is the primary reason why I added 75C for cold environment.

Not sure how cold it gets in Bahrain during those winter days but I will tell you
if its like in California during coldest winter time were I am still walking around with
shorts outside then this isn't cold enough....

Anyway, 75C is.

Regards,
Anri

[ac427]

Hi Anri, I would like one of your thermostats.

Is 75⁰C only needed in very cold climates?

[discoelk]

X2. How do we buy this?

[Anri]

X2. How do we buy this?

Sent me PM with your name, shipping address, and
choice.

Also in the payment put a Note your Forum user name so I can
recognize who is who.

Thanks,
Anri

[bigjae46]

Jae,

I specifically underlined that the Check
engine light will NOT turn on.

I just put 900 miles on the test car and out
of those 400 miles were on a 60F morning starts.

On 55C the check engine light will turn on..
one can turn it off from the ECU menu but
its cold for daily.

I have to ask Tomba and I hope he can
share some data at 70C if the OEM map is out
of Enrichment mode?


Regards,
Anri

Oh, I was thinking this was the 55c t-stat. Makes sense now. You're killing me with the celsius...lol

[HighOnLSB]

Okay sure. This is the primary reason why I added 75C for cold environment.

Not sure how cold it gets in Bahrain during those winter days but I will tell you
if its like in California during coldest winter time were I am still walking around with
shorts outside then this isn't cold enough....

Anyway, 75C is.

Regards,
Anri

Can you better define "cold environments"? In the PNW winter driving ambient temperatures are around 0-5C, but also summer track events are running during 30-35C days... Will the 70C thermostat be able to handle all of those conditions? Or is the 75C thermostat the more optimal option?

I tried to ask these questions in PM but have not heard back. Figure the information could be helpful to others as well.

[Bry5on]

Here’s a datalog driving uphill at 90-100*F with a stock relatively refreshed cooling system and AC on full blast. Coolant temp got up to 94C at steady state and coolant gauge registered just below the 3/4 dot. Hope this helps. https://datazap.me/u/bry5on/hot-uphi...oom=9655-26853

[Anri]

All PMs replied.

[Anri]

Here’s a datalog driving uphill at 90-100*F with a stock relatively refreshed cooling system and AC on full blast. Coolant temp got up to 94C at steady state and coolant gauge registered just below the 3/4 dot. Hope this helps. https://datazap.me/u/bry5on/hot-uphi...oom=9655-26853

Thanks for posting.

The other day I logged my test car during test and
I was 450 C pushing 500 C EGTs on 95-105F weather.


You are running only 104 C kind of odd.

Regards
Anri

[Bry5on]

Thanks for posting.

The other day I logged my test car during test and
I was on nearly 450 C pushing 500 C EGTs.


You are running only 104 C kind of odd.

Regards
Anri

My math calculation for EGT is wrong in my datalogger! I haven't spent the time to figure out the correct calc from the raw DME log. Any chance you have that off hand? I can then fix this one [and my future] logs. Good catch, it's the last one on my to-do list.

I also mistakenly took GPS altitude out of this log, but you can approximate it by following the ambient pressure drops

edit: Also realized I broke my gear calculation in my last parameter change. Fun, fixed that now.

[Anri]

[QUOTE=Bry5on;n269630]Good catch/QUOTE]

Yes this is with my OBD life data stream scanner.

I will post in a few days.

[0-60motorsports]

Anri If you can lock down the purchase for me I can install and test the 75c TSTAT in 125-140f weather and monitor coolant temps too. Thanks.

[Tomba]

radiator outlet temps near 60°C during cruise, after some pulls it gets higher and we drive slower. Still engine temps <90°C which seems really OK from my side.
Only mods = CSL airbox.

[ZiMMie]

These are most likely the same thermostats found on dodge diesel and peterbuilt engines.
They are compatible with s65/s85.

On s54 you will have to remove the middle gasket and install the OE O-ring in the thermostat housing.

they are like 15$ a pop.

70/160 Degrees
75/170 Degrees
80/180 Degrees
90/190 Degrees