[AlvaroN55]

Deleted

[Saif2018]

Originally Posted by portugal335i

I guess this will work for the n54 cause they have the same solenoids
BMW n55 pwg boost solenoid bypass
2011 e90 n55 pwg (USA car) mhd stage 2+ 93 octane.
I bypassed the boost solenoid pressure converter by disconnecting the vacuum hoses from the boost solenoid and connect the hoses with a 1/8 barb straight connector so that all the air from vacuum pump goes to the wastegate actuator to keep the wastegate valve close all the time to get faster throttle response.
The result is less throttle lag and the car is running stronger. No check engine light nor codes…..love it.

And….this is a good way to test a solenoid (low Boost situation) without a vacuum pump.
Bypass the solenoid and if the boost goes up it is a bad solenoid, if the boost stays the same (low) the boost leak is somewhere else.
The solenoid bypass will stop the wastegate rattle too!

Wastegates closed all the time?

lol, that should be a surefire way to kill the turbos

[AlvaroN55]

Originally Posted by Saif2018

Wastegates closed all the time?

lol, that should be a surefire way to kill the turbos

That never stopped people from running 20 psi of boost from stock turbos
Subarus, Mitsubishis, Hondas, Toyotas and most of the turbo cars come with the wastegate valve closed under no boost and the valve only opens on the preset boost limit so one can say that theses cars are running 90% of the time with the wastegate valve closed. When they increase the boost on these cars all they do is keep the valve close for longer or closed all the time (when running 20 or more psi of boost
Are the turbos from bmw of inferior quality than all the turbo cars since the 70’s that came from factory with the wastegate closed?

[Saif2018]

Originally Posted by portugal335i

That never stopped people from running 20 psi of boost from stock turbos
Subarus, Mitsubishis, Hondas, Toyotas and most of the turbo cars come with the wastegate valve closed under no boost and the valve only opens on the preset boost limit so one can say that theses cars are running 90% of the time with the wastegate valve closed. When they increase the boost on these cars all they do is keep the valve close for longer or closed all the time (when running 20 or more psi of boost
Are the turbos from bmw of inferior quality than all the turbo cars since the 70’s that came from factory with the wastegate closed?

It doesn't look like you are aware, on the N54 turbos build boost when Wastegate is closed opposite to other vehicles.

When it's not under boost, wastegates are open. If you force the turbos to be always on boost, by keeping the wastegates closed at all times, its a surefire way to blow your turbos quickly. I've been running 20psi for some time on a custom map, obviously trying to run 20psi all the time would have blown the turbos asap.

[AlvaroN55]

Originally Posted by Saif2018

It doesn't look like you are aware, on the N54 turbos build boost when Wastegate is closed opposite to other vehicles.

When it's not under boost, wastegates are open. If you force the turbos to be always on boost, by keeping the wastegates closed at all times, its a surefire way to blow your turbos quickly. I've been running 20psi for some time on a custom map, obviously trying to run 20psi all the time would have blown the turbos asap.

It doesn’t look like that you are aware that on a turbo car one only make boost when he floors the car, valve close or not from factory.
Otherwise all the cars that come with the wastegate close from factory (your way of thinking) would make full boost at idle.

[Saif2018]

Originally Posted by portugal335i

It doesn’t look like that you are aware that on a turbo car one only make boost when he floors the car, valve close or not from factory.
Otherwise all the cars that come with the wastegate close from factory (your way of thinking) would make full boost at idle.

Your still confused.

What you said is wastegates remain closed all the time by bypassing the boost solenoids, If that's the case, WGDC would remain at 100% all the the time throughout the whole pull. Do yourself a favour and ask a tuner what would happen if WGDC never dropped from 100% throughout pulls.

[CarAbuser]

Originally Posted by portugal335i

I guess this will work for the n54 cause they have the same solenoids
BMW n55 pwg boost solenoid bypass
2011 e90 n55 pwg (USA car) mhd stage 2+ 93 octane.
I bypassed the boost solenoid pressure converter by disconnecting the vacuum hoses from the boost solenoid and connect the hoses with a 1/8 barb straight connector so that all the air from vacuum pump goes to the wastegate actuator to keep the wastegate valve close all the time to get faster throttle response.
The result is less throttle lag and the car is running stronger. No check engine light nor codes…..love it.

And….this is a good way to test a solenoid (low Boost situation) without a vacuum pump.
Bypass the solenoid and if the boost goes up it is a bad solenoid, if the boost stays the same (low) the boost leak is somewhere else.
The solenoid bypass will stop the wastegate rattle too!
I am not going to keep the wastegate bypassed all the time , just for race day or racing occasions!

Sounds like a really good idea.

The boost solenoids are just extra crap BMW put in the car to make it more unreliable and the wastegates are just there to rattle and have no functional purpose.

Sounds to me like a win/win scenario. If you are a keen DIY guy you could weld the wastegates shut so you don't even need to wait for vacuum to build and remove all the extra failure points of the vacuum lines.

[TyroneShoelaces]

Originally Posted by CarAbuser

Sounds like a really good idea.

The boost solenoids are just extra crap BMW put in the car to make it more unreliable and the wastegates are just there to rattle and have no functional purpose.

Sounds to me like a win/win scenario. If you are a keen DIY guy you could weld the wastegates shut so you don't even need to wait for vacuum to build and remove all the extra failure points of the vacuum lines.

relevant username

[AlvaroN55]

Originally Posted by Saif2018

Your still confused.

What you said is wastegates remain closed all the time by bypassing the boost solenoids, If that's the case, WGDC would remain at 100% all the the time throughout the whole pull. Do yourself a favour and ask a tuner what would happen if WGDC never dropped from 100% throughout pulls.

The only way that the wgdc goes to 100% is when the boost is below target boost, meaning there is a boost leak.
Since I don’t have a boost leak and the actual boost is above target (making more boost) the wgdc percentage should be on the low 20’s.
On late 80’s, early 90’s when there was no tunes to increase horsepower all we did was adding extra strong springs to keep the wastegate closed.
Nissan 280z turbo, 300z turbo, eagle tallon turbo, Toyota turbo….and I never blew any turbo.

[stewbets]

Originally Posted by portugal335i

The only way that the wgdc goes to 100% is when the boost is below target boost, meaning there is a boost leak.
Since I don’t have a boost leak and the actual boost is above target (making more boost) the wgdc percentage should be on the low 20’s.
On late 80’s, early 90’s when there was no tunes to increase horsepower all we did was adding extra strong springs to keep the wastegate closed.
Nissan 280z turbo, 300z turbo, eagle tallon turbo, Toyota turbo….and I never blew any turbo.

Are you trolling? Bypassing the boost solenoids is the definition of 100% wgdc. Your logs won't show it, of course, because you bypassed the solenoids. Forget about whatever you did in the 80's and 90's, this idea is incredibly ignorant. I think I've said too much because I have to believe I'm dealing with a troll.

[Mustafa.e92]

Idk what the fuck I just read but I want my 5 minutes of time back

[AlvaroN55]

Originally Posted by mustafa.e92

idk what the fuck i just read but i want my 5 minutes of time back

😅🤪

[Saif2018]

Well we didn't ask for it, but he gave us some entertainment lol.

[iqraceworks]

Good Lord.....what a stupid idea. Let's keep the wastegates closed all the time....no need to ever regulate boost.

Where do people come up with this stupid stuff?? 🥴

[AlvaroN55]

Originally Posted by iqraceworks

Good Lord.....what a stupid idea. Let's keep the wastegates closed all the time....no need to ever regulate boost.

Where do people come up with this stupid stuff?? ��

Do I smell a new N55 dyno record here??

Quote:
The car is our 2011 135i w/ DCT, JB4 (Stage2), AR 4" downpipe, and WW quick install meth kit. I have an N55 Helix IC for it but have not had time to install it yet, hopefully soon! The car is using the same Shell 91 octane + NOS octane booster it's been on for the past 3k miles. Temps were in the low 70s.

“For today's meth testing I wound up having to run 100% duty cycle most of the power band. Meaning the JB4 is working the wastegate as much as it can be worked. And even in that trim it struggled to hold 17psi @ 5000rpm and 13psi @ 6000rpm. Overall I'm happy with the results but sad to report this motor with the stock turbo is about tapped out at around 370rw. Maybe with the IC on cold day we can extend that to 385rw. But it's going to take a questionably loose dynojet and a prayer to get to 400rw.

On the plus side I superimposed one of the runs against the same car when it was stock and was pleased with the 100whp delta.

Despite the small turbo you guys are going to *love* Stage2. All the N54 functionality is there, we've put lagfix back in, and partial throttle is buttery smooth.”

This was terry from burger motorsports running 100% duty cycle so…..terry must be stupid!

[CarAbuser]

Originally Posted by portugal335i

Do I smell a new N55 dyno record here??

Quote:
The car is our 2011 135i w/ DCT, JB4 (Stage2), AR 4" downpipe, and WW quick install meth kit. I have an N55 Helix IC for it but have not had time to install it yet, hopefully soon! The car is using the same Shell 91 octane + NOS octane booster it's been on for the past 3k miles. Temps were in the low 70s.

“For today's meth testing I wound up having to run 100% duty cycle most of the power band. Meaning the JB4 is working the wastegate as much as it can be worked. And even in that trim it struggled to hold 17psi @ 5000rpm and 13psi @ 6000rpm. Overall I'm happy with the results but sad to report this motor with the stock turbo is about tapped out at around 370rw. Maybe with the IC on cold day we can extend that to 385rw. But it's going to take a questionably loose dynojet and a prayer to get to 400rw.

On the plus side I superimposed one of the runs against the same car when it was stock and was pleased with the 100whp delta.

Despite the small turbo you guys are going to *love* Stage2. All the N54 functionality is there, we've put lagfix back in, and partial throttle is buttery smooth.”

This was terry from burger motorsports running 100% duty cycle so…..terry must be stupid!

To be fair the whole concept of an external boost controller questionable when you have an unlocked DME. Bypassing the boost solenoids is the next logical step after buying a JB4 along with welding your diff and putting racecar stickers and a huge carbon fibre snow plow splitter on your car.

[neilvan]

a number of years back I had a Saab viggen and after some unfortunate events the wastegate line got ripped.

So with that system the wastegate was fully shut and what was supossed to be a ~20psi max pressure; I ended up watching my boost gauge peg well over 35psi into oblivion.

I still have the piston on my shelf

[iqraceworks]

Originally Posted by portugal335i

Do I smell a new N55 dyno record here??

Quote:
The car is our 2011 135i w/ DCT, JB4 (Stage2), AR 4" downpipe, and WW quick install meth kit. I have an N55 Helix IC for it but have not had time to install it yet, hopefully soon! The car is using the same Shell 91 octane + NOS octane booster it's been on for the past 3k miles. Temps were in the low 70s.

“For today's meth testing I wound up having to run 100% duty cycle most of the power band. Meaning the JB4 is working the wastegate as much as it can be worked. And even in that trim it struggled to hold 17psi @ 5000rpm and 13psi @ 6000rpm. Overall I'm happy with the results but sad to report this motor with the stock turbo is about tapped out at around 370rw. Maybe with the IC on cold day we can extend that to 385rw. But it's going to take a questionably loose dynojet and a prayer to get to 400rw.

On the plus side I superimposed one of the runs against the same car when it was stock and was pleased with the 100whp delta.

Despite the small turbo you guys are going to *love* Stage2. All the N54 functionality is there, we've put lagfix back in, and partial throttle is buttery smooth.”

This was terry from burger motorsports running 100% duty cycle so…..terry must be stupid!

Dialing in 100% duty cycle at wide open throttle for the wastegates via the tune isn't the same as physically forcing the wastegates closed 100% of the time. You really need to educate yourself on how these systems are designed to work.

[AlvaroN55]

Originally Posted by iqraceworks

Dialing in 100% duty cycle at wide open throttle for the wastegates via the tune isn't the same as physically forcing the wastegates closed 100% of the time. You really need to educate yourself on how these systems are designed to work.

Closing the wastegate electronically or mechanically the end result is the same.
In 2007 even terry were posting instructions (pictures) of how to bypass the wastegates on the n54’s but after when he saw the chance of making money with the jb he deleted the instructions.
There was no money to be made with instructions!
So for the smart ones here asking “who came up with this stupid idea” the answer is: TERRY

[iqraceworks]

Originally Posted by portugal335i

Closing the wastegate electronically or mechanically the end result is the same.
In 2007 even terry were posting instructions (pictures) of how to bypass the wastegates on the n54’s but after when he saw the chance of making money with the jb he deleted the instructions.
There was no money to be made with instructions!

Correct....but nobody dials in 100% closed wategates 100% of the time.

If there was any benefit in doing that at all (there isn't).....after 15 years of these cars being out on the roads, don't you think it would be common knowledge?

There is no logic in forcing the wastegate closed 100% of the time...none.

But hey, if you want to screw around and do it to your car...more power to you

[iqraceworks]

Besides the added heat, crummy fuel mileage, and extra load on your turbo and bearings all the time, what do you expect to gain from forcing your wastegates closed 100% of the time?

[AlvaroN55]

Originally Posted by iqraceworks

Besides the added heat, crummy fuel mileage, and extra load on your turbo and bearings all the time, what do you expect to gain from forcing your wastegates closed 100% of the time?

I can take a stock Subaru sti, drive it 1200 miles from Boston to Tampa bay with the wastegate closed from factory….can keep going to California with the valve close….drive back to Boston with the valve close for let’s say 4000 miles and that’s not a problem!!!!!!
THE VAVE CLOSED ONLY BECOMES A PROBLEM IF THE CAR IS A BMW!!!!!
On bmw the wasgate valve is normally open to help pollution.
This is probably your first turbo car and you are a professional now!
You can not see 4 fingers in front of your nose.
Narrow-minded stupid people!