Whippled S550 daily driver overheating indication: Coolant temp or CHT?

[Meatball]

I unfortunately have to drive my whippled 2017 30 miles to work and back several days a week, and in bad SoCal traffic when its hot out I notice the CHT creeps up, even to 220, while the coolant temp needle is in its usual place about centered or slightly towards the cool side. Which should I believe? The 220 scares me so I roll down the windows and crank the heater, which is about as delightful as it sounds when it's 90+ outside and in parking lot-like traffic.

Note that I bought the large heat exchanger which I'm wondering if is making things worse by shielding the radiator right behind it (I have a base, so no PP radiator).

Thx in advance.

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[The Watchman]

Install an FI Interchiller stage 1 or 2 kit, (preferably stage 2) and be done.

 

[The Watchman]

For reference, I have a 22’ GT with Roush P2 kit and FI Interchiller Stage 2 kit and my blower inlet lines have ice built up on them in the warmest weather…

 

[Meatball]

For reference, I have a 22’ GT with Roush P2 kit and FI Interchiller Stage 2 kit and my blower inlet lines have ice built up on them in the warmest weather…

I’m mostly worried about the engine temp itself rather than inlet temps. Will that help cool the coolant in the radiator?

 

[The Watchman]

I’m mostly worried about the engine temp itself rather than inlet temps. Will that help cool the coolant in the radiator?

After installing FI kit and Reisch 170 degree thermostat I noticed drastic improvement in overall engine temps across the board…however, to answer your question directly, no the SC system is usually on a completely different system than the other Freon

 

[Meatball]

Do you monitor CHTs? What’s the highest you’ve seen since boosted?

 

[Zrussian13]

Your fine. I drive 50+ miles every day and i see 220ish cruising in bad summer traffic often. I wouldn't beat on it when temps are that high but your ok.

 

[Meatball]

Your fine. I drive 50+ miles every day and i see 220ish cruising in bad summer traffic often. I wouldn't beat on it when temps are that high but your ok.

Thanks, good to know.

 

[engineermike]

Don’t worry about 220 cht. Won’t hurt a thing. If you really want you can install the reisch thermostat and tune the fans to come on sooner.

 

[luc]

After installing FI kit and Reisch 170 degree thermostat I noticed drastic improvement in overall engine temps across the board…however, to answer your question directly, no the SC system is usually on a completely different system than the other Freon

A thermostat only regulates the minimum cooling temperature
The maximum is controlled by the system btu’s capacity
So , except for a slight increased delay in reaching maximum temperature, your 170* is doing nothing to lower it

 

[Paddles]

My bone stock GT runs ~230 CHT in South Texas heat during normal driving

 

[ice445]

My bone stock GT runs ~230 CHT in South Texas heat during normal driving

That doesn't seem right to me. I only ever saw 230+ when climbing a steep grade at a slow speed (~40mph) for a long time. That was on the stock radiator though. PP radiator does so much better in that regard. In actual normal driving the fans should regulate your temps starting around the 220 mark, so either they aren't working, the water pump isn't doing its job, or you have grille shutters that are stuck partially closed or something.

 

[Paddles]

That doesn't seem right to me. I only ever saw 230+ when climbing a steep grade at a slow speed (~40mph) for a long time. That was on the stock radiator though. PP radiator does so much better in that regard. In actual normal driving the fans should regulate your temps starting around the 220 mark, so either they aren't working, the water pump isn't doing its job, or you have grille shutters that are stuck partially closed or something.

Non PP car. I checked the items you listed multiple times, everything working. I even started a thread about it. I think it was just the summer heat, last summer my inlet air temps were ~145. Ambient was ~105 with high humidity.

These were longer drives that eventually hit 230s. But it was consistent, every day as the sun beat us down the car wouldn't cool off enough between drives and by lunch CHTs would be hitting 230s.

I started parking it with the hood open and that helped a ton but she still hit the 230s.

 

[Keeffa]

I unfortunately have to drive my whippled 2017 30 miles to work and back several days a week, and in bad SoCal traffic when its hot out I notice the CHT creeps up, even to 220, while the coolant temp needle is in its usual place about centered or slightly towards the cool side. Which should I believe? The 220 scares me so I roll down the windows and crank the heater, which is about as delightful as it sounds when it's 90+ outside and in parking lot-like traffic.

Note that I bought the large heat exchanger which I'm wondering if is making things worse by shielding the radiator right behind it (I have a base, so no PP radiator).
We
Thx in advance.

I'm in Australia so we're in Celsius and I've run my na car at 120°c before. If it's getting to a certain temp and staying there your cooling system must be working otherwise it would just keep heating up, I'm thinking.

 

[Meatball]

I'm in Australia so we're in Celsius and I've run my na car at 120°c before. If it's getting to a certain temp and staying there your cooling system must be working otherwise it would just keep heating up, I'm thinking.

Wow that’s hot. But you’re right, the system is working if it’s capped.

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