X pipes and CHT (cylinder head temp)

[hrothgar02]

Before X pipes CHT 210+ in 95+ degrees Houston weather.
After X pipes CHT 203-206 (never rose abover 210) in the same weather condition.

Anyone else experience this? Lower back pressure? Not complaining but curious as to what might cause this.

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[berserker_sid]

Before X pipes CHT 210+ in 95+ degrees Houston weather.
After X pipes CHT 203-206 (never rose abover 210) in the same weather condition.

Anyone else experience this? Lower back pressure? Not complaining but curious as to what might cause this.

what about traffic

 

[hrothgar02]

Same traffic pattern.

 

[berserker_sid]

how..i mean in heavy mine is always in that range...

 

[EFI]

Probably just a coincidence or something was different that caused the temps to be different (weather, traffic pattern, your driving characteristics).

There's literally 0 correlation between an X pipe and engine temperature. Plus ,the PCM controls the flow of coolant to try and keep the temperature at a certain value...so if something did happen to cool the engine then the PCM would just adjust to bring it back up. There's a target CHT hardcoded in the tune which the PCM tries to stay around.

 

[hrothgar02]

Got it. Appreciate the insight. BTW should have gotten rid of the resonator long time ago! Thing sounds mean.

 

[SpeedLu]

Got it. Appreciate the insight. BTW should have gotten rid of the resonator long time ago! Thing sounds mean.

Yep, an X-pipe (H-pipe too) makes the Coyote sound like a monster. Always a recommended mod.

 

[DarkestHour]

Freer flowing exhaust will typically reduce temps

 

[dev1360]

Probably just a coincidence or something was different that caused the temps to be different (weather, traffic pattern, your driving characteristics).

There's literally 0 correlation between an X pipe and engine temperature. Plus ,the PCM controls the flow of coolant to try and keep the temperature at a certain value...so if something did happen to cool the engine then the PCM would just adjust to bring it back up. There's a target CHT hardcoded in the tune which the PCM tries to stay around.

Unless I'm missing something, the car uses a mechanical thermostat. There's nothing the ECU can do to change temps. When the mechanical thermostat is changed, the CHT drops by 20-30*.

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