Engine/Transmission (1994 - 1998) Lots of turbo bark?

[osmith]

I've been getting lots of turbo bark lately. I can be at less than half throttle while accelerating from a red light etc. . and if I let off the throttle I get the whump whump from under the hood. It's not like I'm trying to do it. . but sometimes you accelerate from a stop and the car in front of you slows down or something and you let off and it'll happen.



My question is this going to ruin my turbo or what? It never used to happen with the stock air filter, but now that I have an AFE in there it happens alot.





Thanks for any input...

 

[SEmerson]

It is hard on the turbo. Some people have broke the shaft on there turbos but it is rare. You should be able to get used to not letting off suddenly. Plus the more boost you make the easier it is to bark it. I rarelly bark mine any more. You just cant drive it like a gasser.

 

[BFC]

Definatly not good for the turbo. If you let off slowly of the go pedal, it's should help with the barking. I run a mega cannon and a Comp and I have no barking problem, that is if I don't let my foot off the pedal from WOT.



Glenn

 

[illflem]

I've only known one person who snapped off his turbo shaft while barking. What I've seen happen quite a bit though with folks who allow barking is it will either blow your airfilter off if it's a hose clamped on type or wreck the seal on a box type filter allowing dirt in the intake. Best to never go from boost to idle suddenly, if you bark it check your airfilter and inlet connections often. Used to happen to me when coming up to a slow moving rig on a hill while in cruise till I learned to add some throttle while disengaging the cruise.



What's happening is all your intake tubes and intercooler are pressurized by boost, when you let it go all the way down to idle suddenly the only way for the pressure to escape is by flowing backwards though the turbo and air filter. It may have always been doing it, you just hear it better with the AFE.

 

[chrleb1]

Barking isn't the best for a turbo. If you are running a HX-35, you can get away with it. But the bigger the wheels, the most stress on the shaft. Basically what you are doing is spinning the turbo at about 60,000 rpms to 0 in no time flat. Thats were you get your tortion stress on the shaft. You can reduce this by having more exhaust flow (i. e. bigger exhaust housing, exhaust and so on). Mine stopped barking when i put all of my exhaust stuff on.

 

[Joseph Donnelly]

Barking also puts a lot of wear on the bearings. You just hear more of it with the aFe as the stock filter silenced the noise somewhat.