Mods done!!!!

429 Views 8 Replies 7 Participants Last post by djalbin, 11 d ago

frostedscat392

Discussion Starter · 13 d ago

Hey guys i just got my car tuned, intake and longtube headers put on the car runs amazing!!!! i cant stop smiling when i get on that acceleration
car runs like a different animal, the only concern is do i have to change my thermostat to a 180? i don't have any issues with my car temperature but i just
wanted to know if it is necessary

Save

1 - 9 of 9 Posts

HemiLonestar

· #2 · 13 d ago

Have to? No. This was a mod for early 5.7's back in the day because if you overheated them they sometimes had a tendency to drop valve seats. Your 392 is more likely to chew up a lifter or cam lol. If you had more serious modifications like a heavy cam or boost then you might want to so it offsets the extra heat the engine would then make.

Save

Reactions: 1

John Kloehr

· #3 · 13 d ago

Really no reason to do so, but if you do...

Also retune so the fans turn on at the new lower temperatures.

Save

Reactions: 2

Koron

· #4 · 13 d ago

John Kloehr said:
Really no reason to do so, but if you do...

Also retune so the fans turn on at the new lower temperatures.

What about running a lower tstat without the fan temp setting changed in the case one doesn’t have an unlocked PCM and a tuner?

The Tazer allows manual turn on of the fan.
If you change the Tstat to a lower temp it should be open above the temp setting (180F) and stay there while driving with some airflow. When stopped and temp rises turn on the fan with the Tazer button press.

Even without the fan changethe temp will roll up to 200 and then the fan kicks on.

Thoughts?

Save

djalbin

· #5 · 12 d ago

The Tazer allows manual turn on of the fan.

Original intention for this feature is when sitting at the staging lanes with the engine off; manually run the fans to reduce heat soak.

What about running a lower tstat without the fan temp setting changed

Thermostat will be fully open at the lower temp but the fans will not turn on until the coolant reaches the 200+ degree temp. So the 180°F thermostat will not make a difference unless you're at highway speeds where the airflow through the radiator is providing the cooling. As soon as you slow down, stop, or enter stop-go driving ... where the fans are needed for radiator cooling - the temps will be in the 200+ degree range.
.

Save

Reactions: 1

Koron

· #6 · 12 d ago

djalbin said:
Original intention for this feature is when sitting at the staging lanes with the engine off; manually run the fans to reduce heat soak.

Thermostat will be fully open at the lower temp but the fans will not turn on until the coolant reaches the 200+ degree temp. So the 180°F thermostat will not make a difference unless you're at highway speeds where the airflow through the radiator is providing the cooling. As soon as you slow down, stop, or enter stop-go driving ... where the fans are needed for radiator cooling - the temps will be in the 200+ degree range.
.

So basically around town effectively it’s still 200F but moving with air flowing it’s cooler near 180F.

I believe the Aux buttons on the steering wheel can be programmed via the Tazer to turn the fan o/off with a simple button press, so I might try this until I swap the PCM and run a tune next year.

Are there Tstat options between 180-200 to reduce the temp swing?

Which brand are recommended on our Chargers? I haven’t replaced a thermostat in a Dodge - where is it on the 392 and do I need a gasket? 10 minute job?

Save

Mantis

· #7 · 12 d ago

Koron said:
What about running a lower tstat without the fan temp setting changed in the case one doesn’t have an unlocked PCM and a tuner?

The Tazer allows manual turn on of the fan.
If you change the Tstat to a lower temp it should be open above the temp setting (180F) and stay there while driving with some airflow. When stopped and temp rises turn on the fan with the Tazer button press.

Even without the fan changethe temp will roll up to 200 and then the fan kicks on.

Thoughts?

I think this is a option. Running a 180 thermostat might be a good idea especially if you live in a place where it gets hot outside.
Power wise at the track this also might help to keep the underwood temps slightly lower. It's something I have been thinking about doing. It's a very easy mod , cheap and can be put back to stock just as easy if it doesn't work out.

Save

Punisher69

· #8 · 12 d ago

Putting a 180 in and not adjusting the fan temps is a really good recipe for a check engine light. The PCM looks for a certain temp in a certain time frame. The 180 doesn't let that happen, especially on colder days and the light will come on.

The Tazer function is for engine off/ key on. That won't help at all in traffic.

Save

djalbin

· #9 · 11 d ago

Putting a 180 in and not adjusting the fan temps is a really good recipe for a check engine light.

The PCM may log a P0128 (Thermostat Rationality) code. This can happen when the actual engine coolant temperature falls too far below the predicted engine coolant temperature.

Are there Tstat options between 180-200 to reduce the temp swing?

Not that I'm aware of.

where is it on the 392 and do I need a gasket? 10 minute job?

Thermostat is inside the thermostat housing. No gasket. The thermostat has an O-ring. Remove the coolant tank pressure cap. This will release pressure in the coolant system. The housing has two bolts to remove.

When installing the thermostat be sure to position the vent hole at the 12 o’clock position. After installation, replace lost coolant and bleed the coolant system of any air.

See less See more

Save

Reactions: 1

1 - 9 of 9 Posts

Top Contributors this Month