3.3TT Max of boost supported by factory turbochargers

[Dark]

Hello guys! I'm curious how much boost the factory turbochargers support. I was playing with the JB4 and I increase 9psi over. After that now I hear a weird sound on the turbocharger. I know for sure that change impacts something, but I want to know if somebody else has this issue before.

Thank you!

 

[ecko04]

Hello guys! I'm curious how much boost the factory turbochargers support. I was playing with the JB4 and I increase 9psi over. After that now I hear a weird sound on the turbocharger. I know for sure that change impacts something, but I want to know if somebody else has this issue before.

Thank you!

TL;DR - This is why we can’t have nice things.

Max boost is going to depend on a lot of factors (weather, elevation, temperature, etc.). You can certainly lookup the Honeywell specifications for the turbos and find out how much they can handle. But there’s a lot more to a turbo than boost pressure.

Map6 allows for a customizable boost profile at the designated RPM levels. However, what you’re entering is in addition to the peak levels.

Hopefully, the JB4’s safety nannies kicked in to prevent you from causing any significant damage.

But no, no one else has encountered that issue because no one else is entering values all willy nilly.

 

[Dark]

TL;DR - This is why we can’t have nice things.

Max boost is going to depend on a lot of factors (weather, elevation, temperature, etc.). You can certainly lookup the Honeywell specifications for the turbos and find out how much they can handle. But there’s a lot more to a turbo than boost pressure.

Map6 allows for a customizable boost profile at the designated RPM levels. However, what you’re entering is in addition to the peak levels.

Hopefully, the JB4’s safety nannies kicked in to prevent you from causing any significant damage.

But no, no one else has encountered that issue because no one else is entering values all willy nilly.

So, I'm curious no one is trying to make something different than MAP3. That is great information, I'm new on this Stinger world. I will research more on Honeywell as is the same of Garrets.

Thank you for the information but is always good to know the limitation of what you drive.

 

[Oryan]

Stop trying to break your turbos. And the question shouldn't be how much boost a turbo can make. The question should be how much boost can a turbo make efficiently, that still adds a reasonable amount of power.

 

[Dark]

Stop trying to break your turbos. And the question shouldn't be how much boost a turbo can make. The question should be how much boost can a turbo make efficiently, that still adds a reasonable amount of power.

I completely agree with you...and that is the word, efficiently. That is what I'm trying to figure out based on the experience of other which already make good power.

 

[ecko04]

So, I'm curious no one is trying to make something different than MAP3. That is great information, I'm new on this Stinger world. I will research more on Honeywell as is the same of Garrets.

Thank you for the information but is always good to know the limitation of what you drive.

I don’t know what you mean by making something different than Map3.

I haven’t used Map3 is a year. I’ve been running Map8, or whatever the WMI Map is on the current firmware, for the past eight months daily.

In terms of “making” a Map, you do understand that you’re talking about a piggyback, right? Many factors limit it and there are modules and systems for which it cannot interface. Ideally, to take full advantage, you’d need some form of ECU tune.

However, don’t learn the limits of a platform by dumping values in a tuning platform and assuming just because something didn’t break, it’s ok to continue to use or add additional amounts.

The best piece of advice I can give you before you grenade your engine is to do a deep dive on N54Tech and spend some quality time reading up on the platform and how the JB4 has evolved over the last 2-3 years. Once you've digested that, if you still wish to add 30psi over stock, feel free to do so. Just remember to post the carnage here afterwards.

 

[Dark]

I don’t know what you mean by making something different than Map3.

I haven’t used Map3 is a year. I’ve been running Map8, or whatever the WMI Map is on the current firmware, for the past eight months daily.

In terms of “making” a Map, you do understand that you’re talking about a piggyback, right? Many factors limit it and there are modules and systems for which it cannot interface. Ideally, to take full advantage, you’d need some form of ECU tune.

However, don’t learn the limits of a platform by dumping values in a tuning platform and assuming just because something didn’t break, it’s ok to continue to use or add additional amounts.

The best piece of advice I can give you before you grenade your engine is to do a deep dive on N54Tech and spend some quality time reading up on the platform and how the JB4 has evolved over the last 2-3 years. Once you've digested that, if you still wish to add 30psi over stock, feel free to do so. Just remember to post the carnage here afterwards.

Awesome you are running Map8 with WMI. Do you have any kind of custom modification or you use the default based on that map? And yes, I'm trying to have my quality time on this forum, is a lot of information. But my question come more on the limitation of the turbochargers and not a JB4. I know what the JB4 can do, but not what the factory turbochargers can do. Again, thank you for the information provided.

 

[ecko04]

Awesome you are running Map8 with WMI. Do you have any kind of custom modification or you use the default based on that map? And yes, I'm trying to have my quality time on this forum, is a lot of information. But my question come more on the limitation of the turbochargers and not a JB4. I know what the JB4 can do, but not what the factory turbochargers can do. Again, thank you for the information provided.

My settings aren’t the default values. They’re specific to my setup for my climate, fuel, and elevation.

 

[xot1]

24~25psi is the limit

 

[Dark]

24~25psi is the limit

I appreciate the information! I increased to 20psi with the fuel on 11.9 and I start hearing that weird sound.

 

[ecko04]

I appreciate the information! I increased to 20psi with the fuel on 11.9 and I start hearing that weird sound.

That’s not correct. You increased 9psi over peak at specific RPM intervals. You don’t know what you were actually hitting without reviewing the logs...assuming you were logging at the time.

 

[STINGER]

Seems the most accepted answer on the forum is that 18-20 psi is the sweet spot on the stock turbos while still being relatively safe and reliable, this taking into account you have the right supporting mods.

 

[Dark]

Seems the most accepted answer on the forum is that 18-20 psi is the sweet spot on the stock turbos while still being relatively reliable.

That is the kind of answer I'm looking for. I appreciate the information. I will make sure don't pass over that range.

 

[3.3ttjb4flying]

24~25psi is the limit

So what is your boost now..??? With your ECU and custom map jb4? Is that peak boost of 24-25. Or that holding steady boost?

 

[nhcowboy28]

400 psi

 

[87and66]

400 psi

 

[nhcowboy28]

View attachment 64060

Exactly

Garrett GTX 100000

 

[Intelliburn]

View attachment 64060

YES!!!

 

[StingerKMA]

Stop trying to break your turbos. And the question shouldn't be how much boost a turbo can make. The question should be how much boost can a turbo make efficiently, that still adds a reasonable amount of power.

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