FL5 Overheated on Track

[PointByPatrol]

Aftermarket intercooler thought right? Not stock IMO.

Correct.

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[PointByPatrol]

Yeah thats spot on, the Golf R comes with an auxiliary radiator, and all that stuff. I wonder how the cooling is with those on track. Theres also the Elantra N. Not sure what Hyundai has done (if any) for cooling since I don't follow that car scene.

The grill on the elantra N is enormous...that's all.

 

[PointByPatrol]

Gridzilla said that he didn't use the typical AN lines when installing the turbo that you are supposed to use, he had a few parts on order and didn't feel like waiting lol.

Those AN lines come with the RV6 turbo kit.

 

[albi]

Gridzilla didn't purchase the metal blow off valve or something like that. His factory one failed, and he overboosted his turbo iirc. He'll be alright...that dude has drug money.

Correct, he kept the OEM bpv and was tuned for more boost than it could handle. All rv6 turbos now ship with the red bpv included and the reason for the increase in the cost of the turbo kit.

 

[tezzasaurusrex]

Yeah thats spot on, the Golf R comes with an auxiliary radiator, and all that stuff. I wonder how the cooling is with those on track.

I can confirm the Golf R handles the heat extremely well - I had beated on mine (Mk7.5 DSG) on track on a 36°C day (over 96°F) and oil temps never exceed 120°C, it was definitely pulling boost though.
The thing had a big radiator and then two auxilary radiators under each headlight. This is what the FL5 needs.

Correct, he kept the OEM bpv and was tuned for more boost than it could handle. All rv6 turbos now ship with the red bpv included and the reason for the increase in the cost of the turbo kit.

Is the OEM bypass valve an issue on OEM turbos but? Even when running higher boost? Maybe @keller can weigh in on this as he's quite familiar with the FK8 scene?
I'm not convinced we've been given the complete story on what happened on Gridzilla's car - we know the coolant lines blew out which would have cooked the turbo, is this then the cause of the failure of the BPV? Rather than the BPV failure/Overboost causing the AN lines to blow out, cause I cant see that happening... and without seeing the logs we will never know...
A turbo without a coolant feed will absolutely cook everything in its surrounding area including the wastegate/BPV etc.
The thing about these kinds of youtubers who are being sponsored is that there are always other interests involved, and unfortunately these "other interests" cover the real truth...

For reference here is the turbo schematic of the FK8 (indentical to the FL5):

The vehicle has two systems run via the PCM to control boost, one being the BPV and the other being the Wastegate Actuator. So even if the BPV was to develop a small tear, the wastegate actuator *should* be able to manage the boost demand by bypassing all the exhaust gas and slowing down the turbine.

 

[PointByPatrol]

I can confirm the Golf R handles the heat extremely well - I had beated on mine (Mk7.5 DSG) on track on a 36°C day (over 96°F) and oil temps never exceed 120°C, it was definitely pulling boost though.
The thing had a big radiator and then two auxilary radiators under each headlight. This is what the FL5 needs.


Is the OEM bypass valve an issue on OEM turbos but? Even when running higher boost? Maybe @keller can weigh in on this as he's quite familiar with the FK8 scene?
I'm not convinced we've been given the complete story on what happened on Gridzilla's car - we know the coolant lines blew out which would have cooked the turbo, is this then the cause of the failure of the BPV? Rather than the BPV failure/Overboost causing the AN lines to blow out, cause I cant see that happening... and without seeing the logs we will never know...
A turbo without a coolant feed will absolutely cook everything in its surrounding area including the wastegate/BPV etc.
The thing about these kinds of youtubers who are being sponsored is that there are always other interests involves, and unfortunately these "other interests" cover the real truth...

I'm going to give the PWR Radiator a shot, but I have my doubts that it'll actually "solve" the issue. Certainly didn't on my FK8.

Side Note: Is Gridzilla even on these forums?

 

[tezzasaurusrex]

I'm going to give the PWR Radiator a shot, but I have my doubts that it'll actually "solve" the issue. Certainly didn't on my FK8.

Side Note: Is Gridzilla even on these forums?

Definitely worth a shot. If its still an issue, I personally think you should try running the OEM intercooler again.

 

[simpleisbest]

I've not found a way to read back oil temperature or pressure on the data logs.. which is quite disappointing aspect of the LogR system. The list of extractable data include:
1. Speed
2. Lat. G
3. Lon. G
4. Steering Angle
5. Accel. Ped. Pos.
6. Brake Pressure
7. Gear Pos.
8. Clutch Ped. Pos.
9. Yaw Rate
10. Intake Air Temp.
11. Water Temp.
12. Ext. Air Temp.
13. Atmos. Pressure

Might be an unpopular opinion but I believe the PRL intercooler to be more of a hinderance to the cooling system performance than a benefit - being a large bar and plate style intercooler reducing airflow to the radiator. What was the ambient temperature of the day?

Look forward to your PWR track spec radiator assessment.

Is this data through OBD2 or are you somehow extracting via CANBUS?

 

[tezzasaurusrex]

Is this data through OBD2 or are you somehow extracting via CANBUS?

Just via the Log R app on the phone. You could technically extract this data via a drive recording if the scan tool you're using has the capability/refresh rate to support it. I know the Honda HDS tool can.

 

[Ic@ns33urhrt]

I have ran a few sessions at VIR with no overheating issues. I am a novice/scrub level driver. Car is completely stock. Except for brake pads and fluid. I always run the heater/vent on high. I believe the highest oil temp was 260. Like you stated running the heat helps a lot. Not that I know what I am talking about. Good luck with the build.

 

[Jester04]

I can confirm the Golf R handles the heat extremely well - I had beated on mine (Mk7.5 DSG) on track on a 36°C day (over 96°F) and oil temps never exceed 120°C, it was definitely pulling boost though.
The thing had a big radiator and then two auxilary radiators under each headlight. This is what the FL5 needs.


Is the OEM bypass valve an issue on OEM turbos but? Even when running higher boost? Maybe @keller can weigh in on this as he's quite familiar with the FK8 scene?
I'm not convinced we've been given the complete story on what happened on Gridzilla's car - we know the coolant lines blew out which would have cooked the turbo, is this then the cause of the failure of the BPV? Rather than the BPV failure/Overboost causing the AN lines to blow out, cause I cant see that happening... and without seeing the logs we will never know...
A turbo without a coolant feed will absolutely cook everything in its surrounding area including the wastegate/BPV etc.
The thing about these kinds of youtubers who are being sponsored is that there are always other interests involved, and unfortunately these "other interests" cover the real truth...

For reference here is the turbo schematic of the FK8 (indentical to the FL5):

The vehicle has two systems run via the PCM to control boost, one being the BPV and the other being the Wastegate Actuator. So even if the BPV was to develop a small tear, the wastegate actuator *should* be able to manage the boost demand by bypassing all the exhaust gas and slowing down the turbine.

Sadly this won’t work, because what happens with a tear like that is more related to turbo shaft and wheel speeds than actual boost. The wastegate will actually close more to try to maintain the boost where it wants since with the leak it will just keep bleeding the pressure. These cars don’t have a turbo speed sensor that I know of to monitor this parameter. So the turbo will be overworked and will spin to uncontrollable speeds and the excess heat produced will just make the turbo die.

The same thing can happen with a blown off charge pipe. If you try to boost the car the turbo will just spin too fast and kill itself.

 

[Jester04]

Yeah thats spot on, the Golf R comes with an auxiliary radiator, and all that stuff. I wonder how the cooling is with those on track. Theres also the Elantra N. Not sure what Hyundai has done (if any) for cooling since I don't follow that car scene.

Its super lame that they refuse to add an auxiliary radiator

I was looking at the Camaro ZL1 1LE. Big supercharged engine with a V8, that thing has 12 heat exchangers lmao

And some of the GM products still over heat with all those exchangers. Boosted cars are a whole different animal with heat management. My s2k never over heats lol, I can lap it to my hearts content.

 

[PointByPatrol]

I have ran a few sessions at VIR with no overheating issues. I am a novice/scrub level driver. Car is completely stock. Except for brake pads and fluid. I always run the heater/vent on high. I believe the highest oil temp was 260. Like you stated running the heat helps a lot. Not that I know what I am talking about. Good luck with the build.

Do you have a black Type R?

 

[Ic@ns33urhrt]

Do you have a black Type R?

Gray

 

[tezzasaurusrex]

Sadly this won’t work, because what happens with a tear like that is more related to turbo shaft and wheel speeds than actual boost. The wastegate will actually close more to try to maintain the boost where it wants since with the leak it will just keep bleeding the pressure. These cars don’t have a turbo speed sensor that I know of to monitor this parameter. So the turbo will be overworked and will spin to uncontrollable speeds and the excess heat produced will just make the turbo die.

The same thing can happen with a blown off charge pipe. If you try to boost the car the turbo will just spin too fast and kill itself.

That makes sense now that I think about it.

I do still think its a big question mark on the root cause of the failure though, bit of a chicken or the egg type situation.

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