FL5 Overheated on Track

[Jester04]

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.

Yeah its hard to pin point for sure even more so without actually breaking down the turbo and seeing what wore out. But over spinning a turbo is a silent killer that most people don’t take into consideration. That is why turbo pressure maps are so important.

on this turbo compressor map you can see how much more broad the MHI stage 2 turbo is regarding working pressures.

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[tezzasaurusrex]

Yeah its hard to pin point for sure even more so without actually breaking down the turbo and seeing what wore out. But over spinning a turbo is a silent killer that most people don’t take into consideration. That is why turbo pressure maps are so important.

on this turbo compressor map you can see how much more broad the MHI stage 2 turbo is regarding working pressures.

Yup. I just don't believe an overspinning turbo would cause the AN lines to let go. Rather the AN lines loosened off and let go, followed by overheating turbo which went into meltdown, rubber seal on BPV melted, overspin and overheated turbo destroys bearings and kaboom.

Have there been reports of the OEM BPV failing on stock or MHI stage 2 turbo's? Assuming most people are running the OEM BPV on their MHI stage 2.

 

[Jester04]

Yup. I just don't believe an overspinning turbo would cause the AN lines to let go. Rather the AN lines loosened off and let go, followed by overheating turbo which went into meltdown, rubber seal on BPV melted, overspin and overheated turbo destroys bearings and kaboom.

Have there been reports of the OEM BPV failing on stock or MHI stage 2 turbo's? Assuming most people are running the OEM BPV on their MHI stage 2.

Not that I have heard so far. But from experience in other platforms its good practice to replace then when pushing more boost from factory.

And yeah I agree, the line has nothing to do with the overspinning. That is a failure/install error.

 

[PointByPatrol]

Yeah its hard to pin point for sure even more so without actually breaking down the turbo and seeing what wore out. But over spinning a turbo is a silent killer that most people don’t take into consideration. That is why turbo pressure maps are so important.

on this turbo compressor map you can see how much more broad the MHI stage 2 turbo is regarding working pressures.

The MHI is an attractive option, but I really want a Garrett option.

 

[PointByPatrol]

Yup. I just don't believe an overspinning turbo would cause the AN lines to let go. Rather the AN lines loosened off and let go, followed by overheating turbo which went into meltdown, rubber seal on BPV melted, overspin and overheated turbo destroys bearings and kaboom.

Have there been reports of the OEM BPV failing on stock or MHI stage 2 turbo's? Assuming most people are running the OEM BPV on their MHI stage 2.

There's another member on CivicX that went through two RV6 turbos, and ultimately landed on the MHI. Not sure which manufacturer makes the RV6 turbo....but it feels like China.

 

[Jester04]

The MHI is an attractive option, but I really want a Garrett option.

Garret options are great. And they will breather better. I’m thinking I might go with MHI just for the simplicity down the road.

 

[PointByPatrol]

Garret options are great. And they will breather better. I’m thinking I might go with MHI just for the simplicity down the road.

I might too depending on what Rampage creates!

 

[Rhorn]

I might too depending on what Rampage creates!

I think you said you had some history with the Garret turbo when you had the FK8?

Curious to how the turbo felt compared to the stock one. Larger turbos should produce more turbo lag, so was wondering if you could describe how that or even the MHI (if you had it) compared to stock the stock turbo.

 

[PointByPatrol]

I think you said you had some history with the Garret turbo when you had the FK8?

Curious to how the turbo felt compared to the stock one. Larger turbos should produce more turbo lag, so was wondering if you could describe how that or even the MHI (if you had it) compared to stock the stock turbo.

I had the stock turbo on my FK8. It was on my Celica that I had a GT3071R. It really didn't strike me as having much lag at all. Boost began at about 3500 RPM's and pulled like a freight train all the way to redline. I had 350whp at 17PSI. Never overheated either.

 

[BigBird]

Before I wadded up my CTR, I was tuned, and doing many laps in 95F temps, and the oil temps (which is a calculation, there is no actual oil temp sensor, so if you change viscosity of the oil, the temp is definitely not accurate) got hot, but the car kept on going. I did remove the rain guard, and ran stock IC. I think a big IC is a big weight over the front of the car, and as noted blocks air to the rad.

The only thing that failed was the fuel gauge. It said more than 3/8 tank, but was really empty as it calculates based on previous driving, and on the way there I had like 30 mpg, and didn't really calculate the track driving well.

I've had both a EN and 7.5 Golf R: The EN oil temps get up there, but the car keeps going. On my DSG Golf R with tune and downpipe, I upgraded the the Radiator, and 2 aux radiators (the manual one's only have one) and it worked great in hot temps after the upgrades.

 

[ne_typer]

I'm not convinced the PRL intercooler is helping in steady state. It might be reducing airflow, and at the end of the day, the car is airflow limited.

 

[Rhorn]

I'm not convinced the PRL intercooler is helping in steady state. It might be reducing airflow, and at the end of the day, the car is airflow limited.

Would having downpipes help make the car run cooler?

 

[PointByPatrol]

Would having downpipes help make the car run cooler?

Yes

 

[Rhorn]

The only thing that failed was the fuel gauge. It said more than 3/8 tank, but was really empty as it calculates based on previous driving, and on the way there I had like 30 mpg, and didn't really calculate the track driving well.

Did you reset the Trip odometer? I wonder if doing that may have gave you a more accurate reading

 

[ne_typer]

Would having downpipes help make the car run cooler?

Downpipe sure, but really you want to improve the efficiency of the intake side (e.g., intake, turbo inlet, and larger turbo more generally).

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