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Author Topic: 1.8T Overboosting or other issues?  (Read 22743 times)
terminator
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« Reply #90 on: February 11, 2023, 05:10:36 AM »

Chinese turbochargers have this problem. I recommend you to check the wastegate port because it can be restricted.
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fknbrkn
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« Reply #91 on: February 11, 2023, 05:16:46 AM »

Just weld it in place
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terminator
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« Reply #92 on: February 11, 2023, 05:38:52 AM »

Check this out
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prj
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« Reply #93 on: February 11, 2023, 06:08:05 AM »

I know but he tuned it with this wastegate
So he could not properly tune it …..
He would retune it for free after i installed the wastegate
You don't understand.
This person who "tuned it" should not be let near an ECU, certainly not a customers ECU.
The boost control is not the main problem, the entire thing is a clusterfuck.

Maybe with WG in order it won't go into limp mode, but it still makes fuck all power and will grenade the engine.
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LynixGO
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« Reply #94 on: February 11, 2023, 11:10:34 AM »

The wastegate port is not restricted like chinese turbos
Its just the flap that is not putting enough pressure on the port causing it to leak
The whole flap is just loose while actuator is connected
I hope its not a chinese turbo i paid 875 euros for this hybrid…
Also u recommend me to let it tune by someone else ?
I dont know anyone that is a good tuner / company in my country
I live 10 min away from belgium and 10 min away from germany
Maybe in germany some good tuners ?
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I hope you have a nice day! Cheesy
LynixGO
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« Reply #95 on: February 16, 2023, 12:35:11 PM »

Hello guys,

Finally got the turbo out
I can send the turbo to the turbo seller and he would fix it for me for free
but after a better look the wastegate port looks restricted like chinese turbos have.....
i dont think its a great idea to put it back in my car?

what do you guys think about it?

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I hope you have a nice day! Cheesy
fknbrkn
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mk4 1.8T AUM


« Reply #96 on: February 16, 2023, 08:27:29 PM »

Chinesium thrash
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terminator
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« Reply #97 on: February 17, 2023, 04:42:56 PM »

The wastegate port is not restricted like chinese turbos
Its just the flap that is not putting enough pressure on the port causing it to leak
Really? Maybe it's better to check first? And what did you expect if you have problems with overboost with the N75 open? And it was quite clear from your logs... at least for me.
I don't mean to be impolite but do you have your own opinion?
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Renegade187
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« Reply #98 on: September 30, 2023, 04:10:35 AM »

Did the OP eventually find the problem with overboosting?
I am having the same issue.  I have an aftermarket WG and N75. 
I have just tested the resistance on the N75 which read 24ohm - fine.  Then the ECU plug and I found that voltage to be 8v which is not enough to activate the valve.
I then isolated the earthing issue by using the battery earth instead of the plug and got a full 12v.  The ECU was extended some time back and I think the earth wire is nackered.

Its worth a try if you didn't come right
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tao13
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« Reply #99 on: September 30, 2023, 04:47:56 AM »

For this chinese turbo, must make the wastegate screw enought weak and after you can work with n75!
I had the same issue in the past with a gt2871r from maxpeeding and with a OEM garrett too (was more simple with this)
It is not restricted , it is enought to evacuate the problem si chinese wastegate springs.
I said what it works for me.
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terminator
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« Reply #100 on: October 01, 2023, 10:51:48 AM »

Yeah, that's why "idiots" from Borg Wagner make a 24mm port instead of 12mm as the "smart" chinese developers do.
I tried everything, even replaced the actuators and springs, nothing helped. All that any tuner can do is to request 0% N75 duty cycle. And if after that there is still overboost, then the turbocharger is crap.
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ratosluaf
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« Reply #101 on: October 02, 2023, 02:23:49 AM »

just bore this hole.... flap is much bigger than hole
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terminator
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« Reply #102 on: October 03, 2023, 02:50:07 AM »

Try it first, and then give recommendations. It's impossible to do.
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ratosluaf
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« Reply #103 on: October 03, 2023, 03:45:39 AM »

Tell me why it is impossible? Grind the flap, use dremel tool to bore out, then weld the flap together as it was. It's about two hour job.
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terminator
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« Reply #104 on: October 04, 2023, 02:50:42 PM »

It is not wood or aluminum, so simply boring it out won’t work. Even if there was access deep into the port (no access, by the way), it would still not be 2 hours with a dremel tool.
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