MN How much boost is too much?

[jock71]

Tried doing a search but could not find what I was after. I have a 2010 MN, I have installed a new 2 1/2 -into a 3inch dump pipe and 3 inch exhaust. My ultra gauge is showing up to 25 pounds of boost now ( have not really taken much notice in past so could not say what it was before). I am not getting any alarms or trouble codes. Should I be concerned? I may need to put a muffler onto it as it is a little loud and you can hear the turbo whistle all the time now when throttle is applied. This in itself is not too much of an issue and I will see what it is like when it carbons up. Cheers Jock

[Tony]

25 psi is fine for short burst, I'm a little perplexed how your not getting a P1298 code though. If you hold it there for over eight seconds it may go limpy as most do.

I assume your seeing a boost spike to 25psi then it settles under 22psi? Very normal with a free flowing exhaust if that's the case.

I have posted on this issue in other threads, so wont go into detail here.

Cheers T

[jock71]

Thanks Tony, yes spiked at 25 under that normally, have seen your post with cures if getting over boost alarms but was not sure how much is too much as I am not getting any codes at this stage, so the turbo will be fine as the car will go into limp mode before any damage? Thanks for the help

[Tony]

They'll take over 40psi (we have done it on a test engine) , so you have nothing to worry about other than the hoses popping off.

Very robust engine.

[Longranger1]

Mine spikes at about 28 psi then will settle back to around 24-25 psi. Ecutek tuning may have something to do with that though.

No limpies, the threshold values have probably been changed a bit so less likely to throw limpies or codes.

[jock71]

Thanks Guys makes me relax now when I boot it cheers

[jock71]

Thanks Guys makes me relax now when I boot it cheers

[mandino]

Mine has been peaking at 42 psi and falling down to around 35 for over 30 000km now with no issues.

[jock71]

Thanks makes me relax more Cheers