Can blowing your turbos from running them at around 15psi or more cause your motor to blow? Or will you just blow the turbo?

 

15 psi on the stock turbos can create a lot of extra heat going into the motor. You never know what is going to happen, but heat isn't good.

I'd stick to 13psi on stockers.

 

If you have to ask, Its best not to.

15psi is pushing it, although there have been a few gentlemen who have pushed the stockers to 20psi making record numb.ers, yet obviously they have experience, and know what they are in for should the inevitable happen

 

It's already known that pushing that much boost on the turbos are not good. Other then the heat generated by stockers on high boost, what are the major consequences of blowing your stock turbos?

 

Major consequences = Lack of power.


I *highly* doubt that you will cause serious damage to your engine as a direct result of breaking your turbo's (alone). Things like (over)boosting beyond what your fuel map can compensate for and boosting way outside of the turbo's efficiency range (increasing the Intake Temps beyond what your IC can effectively cool) will cause lean conditions and pre-ignition. Which will stand a very strong chance of shattering an apex seal, effectively blowing your motor and destroying your stock turbo's at the same time.


The primary result of just killing your turbo's will be that you lose all positive boost pressure... Unless you can somehow manage to send a bit of your turbine up the IC piping, through the IC and into your engine through your TB/UIM/LIM than I'd say that your engine would probably survive blown turbos (Which would be ******* AWESOME! and if you can manage that, than you're either incredibly gifted, or ALL the gods really dislike you).

Any of the more experienced guys/gals care to comment on my take of the situation and either support, or refute my assessment?

Thanks,

Levi

 

In general the turbos burn up and it doesn't affect the engine. But high boost on stock turbos can indirectly damage your engine, just like any other power mod.

As you increase boost you increase heat. The stock turbos are an awfully hot arrangement to begin with, but when you push them above their normal boost the heat goes up more. Since heat damages engines this could be the straw breaking the camel's back, so to say. But that's not the same thing as root cause.

 

This is the exact answer I was looking for!

 

feeding turbo bits through the intercooler is not unheard of, but it's not that likely to happen. Maybe really small bits might make it, but when the turbo self destructs their shouldn't be anymore pressure pushing forward and I doubt vacuum is enough to pull metal...
So I take it you are going to upgrade your turbo soon? From your sig, it looks like you have everything you need to push at 15 PSI, Injectors would be nice and then you can make sure your motor will survive the extra boost. Anyways good luck, and post what you come up with.

 

Actually, I plan to push the twins to 16psi and add 1200cc injectors.

 

Blowing your turbo's can "blow" your motor. I did just that with my BNR's. All the oil drained out the motor and destroyed my newly rebuilt 1000 mile motor. The side seals were fused into the rotors, the side housings were heat scored, the bearings were screwed. Lots of damage, here's some pics I took with my phone...

Note: It wasn't the BNR's fault that they blew, the turbines were out of balance from having apex seals shot threw them at 18 PSi which eventually wore the turbo seals/bearings.









thewird

 

It wasn't the BNR's fault that they blew, the turbines were out of balance from having apex seals shot threw them at 18 PSi which eventually wore the turbo seals/bearings.

I dont understand this, could you explain more about what you mean by this?

 

The BNR turbines were damaged when I blew the motor from running 18 psi and 12 AFR. I then rebuilt the motor and reused the turbo's because they looked fine however they weren't. After about 1000 miles, the turbo's blew because the rotating assemblies were out of balance. This caused all the oil to be drained out the exhaust very quickly and ruin the motor due to lack of lubrication.

thewird

 

Ah ok that makes sense now. I hope that's uncommon...