What are people doing to get around the overboost issue

[Creamsoda]

So I am looking to run less resistance in my exhaust but am worried about overboost. When may I run into this issue and how can I fix it. All i have done right now is a custom axleback with no mufflers. Still cat and resonator. Might change resonator to cherrybomb glasspack and get the invidia j pipe if I can find one.

[Sarang]

Invidia catted J pipe should not overboost.

 

I had zero issues with my J pipe and stock exhaust, but later I had to port my wastegate on my turbo. If you don't want to do port it yourself, you could have a shop do it, but I would expect it to be pricey since it involves removing the turbo. It would also require a custom tune, either e-tune or dyno tune.

 

So the best, most cost effective option is likely to install the Invidia catted j pipe and get a tune.

[FLlegacy]

Ported wastegate or an external wastegat will take care of it. Or a custom header with external wastegates.

 

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[coco26]

I installed an Invidia catted downpipe and turbosmart recirc valve at the same time, and that made my stage 1 tune overboost. Not sure which did it, but I'd be ready to get some tune adjustments made at a minimum.

[dgoodhue]

I installed an Invidia catted downpipe and turbosmart recirc valve at the same time, and that made my stage 1 tune overboost. Not sure which did it, but I'd be ready to get some tune adjustments made at a minimum.

 

They both probably did. Adding the turbosmart BPV, increased my peak boost by 1 psi. Adding a Invidia catback (not the downpipe) increased my peak boost by 0.5psi.

 

Some of the higher than expect boost levels can be tuned for.

[Justen1987]

So overboost is caused when there isn’t enough flow through the waste gate. I experienced that on my car with muffler deletes and a invidia catted j pipe when temps dropped below 40 degrees. Honestly if I could have a do over I probably wouldn’t use the invidia pipe cause it’s just a round pipe inlet which hurts flow through the waste gate. If you compare it to hks or avo designed hi flow cats you can see what I’m talking about.