FL5 PRL High Volume Intake (HVI) Temps. Is this expected?

naafl5

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I'm trying to figure out if the intake temps I am getting with the PRL HVI is as expected.

About 55 degrees (F) outside. While in motion intake temps are about +20 to +35 degrees.

While at a stand still however, I am seeing temps rise to 105+.
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HondaFan777

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No throttle equals no air moving through the intake and into the FMIC. That's why the temps drop when hitting the gas, engine is heat soaking sitting still so temps rise.
 

VtecSlayer

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What are your post-turbo IAT2 temperatures?

I’m currently running the PRL HVIK and FMIC, and my IAT1 temps are around 96°F while IAT2 sits at approximately 78°F—showing impressive efficiency.

It’s important to note that idling on a hot road will naturally lead to heat soak and elevated temperatures, which is completely normal.

If heat management is a concern, I recommend upgrading to hard-lagged heat shields, a turbo blanket, and applying gold tape around the airbox and intake hoses leading to the turbo inlet. A vented skid plate can also help improve airflow.

For additional cooling, removing the hood shroud can allow for better heat dissipation, but I’d only suggest this for track use.

Have you upgraded your charge pipes and intercooler yet? A larger FMIC makes a noticeable difference in maintaining lower temps.

I recently ordered a PRL charge pipe kit and PRL titaniumbturbo inlet kit and am looking forward to testing them with a revised tune for optimal efficiency.

@PRL Motorsports. Please feel free to chime in on the above and keep me honest if anything isn't correct. You guys are the pros here!

Attached photo is an FL5 running a PRL HVIK and PRL FMIC on a custom tune for reference.

You can always move to Antartica or something like that if you're worried about heat! LoL ;)

11th Gen Honda Civic FL5 PRL High Volume Intake (HVI) Temps. Is this expected? Screenshot_20250304_175450_Hondata
 


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naafl5

naafl5

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What are your post-turbo IAT2 temperatures?

I’m currently running the PRL HVIK and FMIC, and my IAT1 temps are around 96°F while IAT2 sits at approximately 78°F—showing impressive efficiency.

It’s important to note that idling on a hot road will naturally lead to heat soak and elevated temperatures, which is completely normal.

If heat management is a concern, I recommend upgrading to hard-lagged heat shields, a turbo blanket, and applying gold tape around the airbox and intake hoses leading to the turbo inlet. A vented skid plate can also help improve airflow.

For additional cooling, removing the hood shroud can allow for better heat dissipation, but I’d only suggest this for track use.

Have you upgraded your charge pipes and intercooler yet? A larger FMIC makes a noticeable difference in maintaining lower temps.

I recently ordered a PRL charge pipe kit and PRL titaniumbturbo inlet kit and am looking forward to testing them with a revised tune for optimal efficiency.

@PRL Motorsports. Please feel free to chime in on the above and keep me honest if anything isn't correct. You guys are the pros here!

Attached photo is an FL5 running a PRL HVIK and PRL FMIC on a custom tune for reference.

You can always move to Antartica or something like that if you're worried about heat! LoL ;)

Screenshot_20250304_175450_Hondata.jpg
Are those temps captured while in motion or at a standstill?
 
 







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