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Discussion Starter #1
Good evening, I have a 2019 GTN Line and its my first boosted vehicle, as its hard to find a good naturally aspirated engine in what I want. Anyway, when accelerating from 3-4k rpm, sometimes I get a surging feeling. The dealer says that when thats happening that the wastegate is on the threash hold of being open and closed. I know there is an aftermarket wastegate solenoid out there that can fix this but I don't want to void any part of my warranty for something they should tune properly. Anybody else experience this? Also, I was thinking if I had more air flow with a K&N filter or even an intake, that could help. Your thoughts?
 

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Discussion Starter #3
Its like it surges in and out of boost upon acceleration. I was told it has to do with the factory waste gate, however, I am putting an AFE intake on tomorrow so I will see if a little more air flow will compensate. I will let you know.
 

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I use a cheap OBD2 reader and torque as a boost gauge. Might be worth the 8 dollar investment to see if you're having any issues between the ECUs desired boost, and the actual boost.

FYI: Our cars run 16lbs stock.
 

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It might be worth disconnecting the battery for a little while to let the computer reset. The computer may have learned something undesirable.
 

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I get the same thing from mine. I haven’t seen any more than 15psi of boost. Ever. It’s more like 12 psi max.
 

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You're not running hard enough! :p

Gotta get the turbo nice and spooled up before you'll hit 15/16 but I've seen mine there.
 

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Discussion Starter #10
Here’s another thing I’ve run into. When the car is cold, there is little to no boost until it warms up a little. I think I e heard of this as a safety feature. I do t get on it in the morning but I had to get out on the road and I noticed it felt like an N/A engine for a couple of miles.
 

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Here’s another thing I’ve run into. When the car is cold, there is little to no boost until it warms up a little. I think I e heard of this as a safety feature. I do t get on it in the morning but I had to get out on the road and I noticed it felt like an N/A engine for a couple of miles.
I don't know if it's a safety feature or not, but I can confirm that I don't get any boost until my car's warmed up.

Colder weather is better for your engine/turbo in general but until the coolant and oil has moved through the engine it's possible the ECU holds back the boost. The other part of this might be that you haven't had enough load on the engine to create an appreciable amount of exhaust gasses to spool the turbo.
 

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Discussion Starter #12
That’s what I figured. I have heard of this being a safety feature on other cars to prevent people from blowing their turbo up. And it’s really if I don’t drive it over night. Otherwise it’s good. I appreciate the input.
 

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Discussion Starter #13
Finally got the Takeda Intake on and there is little to no surge anymore. Worthy upgrade for that, the sound and performance gain. Much more responsive and sounds great.
 
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