[EOMFD-Niko]

Hello, everyone! A few of you might remember my st and remember the boost issue I was having. I still haven't figured it out.. Lol

It has:
Cobb catted dp
Mbrp 3" exhaust
Cobb intake
Cobb intercooler
Sound symposer delete

I read on a post here that you can tell if you have a boost leak by logging the WGDC however I didn't see what to be looking for. What should I be looking for on that? What's healthy and what is an issue?

The issue I still have is boost peaking at 17psi then tampering down. It seems very consistent.

 

[UnfocusedST]

Are you tuned? Also boost will start to fall off with the K03 towards the end of the RPM range.

Sent from another garage.

 

[Kdub085]

Are you on a low-boost map? Check to see if your on map slot #1


Sent from my iPhone using Tapatalk

 

[Freebird23103]

Cobb tunes will show 5-6 lbs in low boost and 21-21.5 in slot 1. That looks more like stock tune max boost numbers of 17-18 lbs

 

[willfromfreeport]

Log wgdc base and wgdc actual. When there's a large difference, there's likely a boost leak.

 

[SIstomper]

Look for pulsing in the log also. You'll see it jumping around all over the place

 

[EOMFD-Niko]

Thanks for the replies everyone! I'll do the data log today.

I am running a custom tune however the boost is the same in the ots Cobb tune also. I haven't tried stock yet though

 

[UnfocusedST]

Thanks for the replies everyone! I'll do the data log today.

I am running a custom tune however the boost is the same in the ots Cobb tune also. I haven't tried stock yet though

Verify that it's not in an eco mode slot. Alot of tunes will default to this slot and you need to change it once the tune is loaded.

Sent from another garage.

 

[EOMFD-Niko]

It's not in Eco, the custom tune doesn't have an eco mode. I checked with the ots tune and I wasn't in Eco mode

 

[UnfocusedST]

It's not in Eco, the custom tune doesn't have an eco mode. I checked with the ots tune and I wasn't in Eco mode

Then I recommend a spray bottle of soapy water and checking ever place there is a connection from the turbo to the head.

Sent from another garage.

 

[EOMFD-Niko]

A new issue I'm having is the car is
Spuddering? I guess is the best way to describe it in first or second at around 1.5k. Not sure if the cold has anything to do with it

 

[hmc2261]

Hello, everyone! A few of you might remember my st and remember the boost issue I was having. I still haven't figured it out.. Lol

It has:
Cobb catted dpi
Mbrp 3" exhaust
Cobb intake
Cobb intercooler
Sound symposer delete

I read on a post here that you can tell if you have a boost leak by logging the WGDC however I didn't see what to be looking for. What should I be looking for on that? What's healthy and what is an issue?

The issue I still have is boost peaking at 17psi then tampering down. It seems very consistent.

Not sure if this has been brought up yet but I'm pretty sure if you're not tuned, you car will always make enough boost to hit a torque target
With colder air you get gmbetter power, so you car does not need to make as much boost to hits its torque target
Does that make sense?
I had a similar question last year because during the winter I noticed my boost wouldn't go above 15-18 psi

 

[brian60]

Not sure if this has been brought up yet but I'm pretty sure if you're not tuned, you car will always make enough boost to hit a torque target
With colder air you get gmbetter power, so you car does not need to make as much boost to hits its torque target
Does that make sense?
I had a similar question last year because during the winter I noticed my boost wouldn't go above 15-18 psi

I would imagine you'd have to be more than stage 1 to reach the kind of power that it would cut you off 3-6 psi of boost. That's pretty dang severe. Take into account that cold weather lowers it a PSI or two that's still a heck of a drop.

Still a possibility at this point.

 

[hmc2261]

I would imagine you'd have to be more than stage 1 to reach the kind of power that it would cut you off 3-6 psi of boost. That's pretty dang severe. Take into account that cold weather lowers it a PSI or two that's still a heck of a drop.

Still a possibility at this point.

Im not tuned and I dont have a boost leak and I still could ony get like 18 psi in the winter, i live in the artic though, so it may be a little different

 

[brian60]

Im not tuned and I dont have a boost leak and I still could ony get like 18 psi in the winter, i live in the artic though, so it may be a little different

Yeah I guess I didn't consider HOW cold...coldest we've seen that I've noticed so far is 8 degrees Fahrenheit. When it's that cold it's always in the morning on the way to work and I'm not in much of a hurry to get there hahaha.

 

[XRJoe]

Not sure if this has been brought up yet but I'm pretty sure if you're not tuned, you car will always make enough boost to hit a torque target
With colder air you get gmbetter power, so you car does not need to make as much boost to hits its torque target
Does that make sense?
I had a similar question last year because during the winter I noticed my boost wouldn't go above 15-18 psi

Most custom tunes use boost targets, and not torque targets like the OEM tune. This provides less consistent power, but the potential for more overall power based on ambient conditions.

OP, check your sound symposer delete. The only spot a boost leak is going to cause the car to sputter is if it's after the TB. Check all vacuum lines as well, especially PCV.