The Horse Sneeze=problem?

[charlief1]

oh, I forgot.....

Getting ready to do some more cooking I see.:biggrin: The german influence maybe?:tongue: LOL

 

[pdzz]

I killed a TE-63 turbo (built by ADP in Canada) due to Sneeze. Though mine sounded more like a horse FART. Then it SH!T itself. But, the real damage was caused by them installing a std thread nut in leiu of a reverse thread and no lock-tite, either, and insufficient wheel to housing clearance. The first time I lifted the throttle at WOT, it had a "contact issue" spun the nut off and broke the shaft in three pieces. Other than that one incident, I have never seen a turbo failure, made by a reputable firm, have an issue with the horse sneezing.

As a side note.....when you sneeze your heart stops. That is the only time during your life that your heart stops. (until the "end") So, technically, wouldn't that mean the horse dies (momentarily, anyway)

LOL!!!!:biggrin:

 

[oc192]

I never noticed the sneeze until I installed my CAI a few weeks back. When I first heard it, I thought I installed the CAI wrong and caused damage. Then I came on here and learned about the sneeze. I am not particularly fond of this noise, is there a way to keep the CAI and eliminate/reduce this noise?

 

[notacarlo]

Yes, but then you get the annoying sound of a BOV. Catch 22.

I have always like the sound, it's what a TR is supposed to sound like...like no other.

 

[WS6]

As a side note.....when you sneeze your heart stops. That is the only time during your life that your heart stops. (until the "end")

Uhmmm...unless you're living with HCM and associate myocardial disarray.... as it happens from time to time


..:frown:

 

["Turbo-T"]

Since I haven't heard a horse sneeze anytime recently are you guys referring to the "chirping" sound heard when you spool up then have to back off the gas suddenly?? It's definitely noticeable in my car and I experimented today with spooling up and backing off a lot more slowly, something I'm going to have to get used to...

Thank goodness for you guys, having no experience I had no idea it might be bad for the turbo...

Yes...it's the fluttering sound heard when you suddlenly let off the throttle after spooling the turbo...

YouTube - 1987 Grand National Turbo Sneeze

 

[Phoneguy]

Since I haven't heard a horse sneeze anytime recently are you guys referring to the "chirping" sound heard when you spool up then have to back off the gas suddenly?? It's definitely noticeable in my car and I experimented today with spooling up and backing off a lot more slowly, something I'm going to have to get used to...

Thank goodness for you guys, having no experience I had no idea it might be bad for the turbo...

If yours is making a "chirping" noise, you need a bigger turbo...:biggrin:


Bryan

 

[Brady87GN]

Yes...it's the fluttering sound heard when you suddlenly let off the throttle after spooling the turbo...

YouTube - 1987 Grand National Turbo Sneeze

Damn, my turbo sounds nothing like that!!! I would describe that as a "turbo shriek" :biggrin: When I said "chirping" that was pretty close, although "fluttering" is right on.

Yes Brian, perhaps I need a bigger turbo. Throw it on the list of needs...

 

[Adam Connell]

Mine sounds like some evil bug... a lot like the cicadas in we get here during the summer time. It chatters in a really sinister way, and I dig it!

 

[turboc87gn]

I think this is what killed my stock turbo a few days ago...I never heard it till i installed my cold air intake..mine was making a ping noise here and there after a sneeze and i think it ultimately led to its demise...

 

[notacarlo]

I think this is what killed my stock turbo a few days ago...I never heard it till i installed my cold air intake..mine was making a ping noise here and there after a sneeze and i think it ultimately led to its demise...

It was doing it before you did the CAI. Doubtful the flutter killed your turbo....there were other things at play. Over boosting can take out the thrust bearing. If you hear a pinging noise then most likely the bearing was going out and the compressor wheel was making contact with the housing. Inspect your compressor and turbine wheels, then look at the inside of the housings. Look at the shaft where it is in contact with the bearing surface and check for gouging. How many miles on the stock turbo. Some have made it to 200K miles but the average I have seen in 150K miles. This is with regular (sometimes premature) oil changes. I did mine at 3000 miles no matter what.
A good way to tell audibly if the bearings are bad is if you can hear a howling sound similar to a firetruck siren while driving. This is the shaft out of balance or a portion of the bearing cracked or worn out. After the car warms up the siren sound may go away.

 

[Sweetwater GN]

Anytime you let off the throttle fast under full boost your going to get it. Every TR does it and it brings up the question of BOVs, which has been beaten to death - even in this thread ! If it make you feel better, invest a couple hundred in one, but thousands of TRs are running around without them.

 

[skidman]

Horse sneeze

I thought a BOV is more for a manual trans car(rice racer) than an auto trans car,because of all the shifting.We only lift once,so I never thought it was a big deal. By the way,I have never owned a horse. Skidman.

 

[turboc87gn]

It was doing it before you did the CAI. Doubtful the flutter killed your turbo....there were other things at play. Over boosting can take out the thrust bearing. If you hear a pinging noise then most likely the bearing was going out and the compressor wheel was making contact with the housing. Inspect your compressor and turbine wheels, then look at the inside of the housings. Look at the shaft where it is in contact with the bearing surface and check for gouging. How many miles on the stock turbo. Some have made it to 200K miles but the average I have seen in 150K miles. This is with regular (sometimes premature) oil changes. I did mine at 3000 miles no matter what.
A good way to tell audibly if the bearings are bad is if you can hear a howling sound similar to a firetruck siren while driving. This is the shaft out of balance or a portion of the bearing cracked or worn out. After the car warms up the siren sound may go away.

Yea it was at 117,000 miles it was on its way out the whole time like you said...It actually seized up..i hope i didnt hurt anything else...

 

[meanchicken]

Tell ya what....I'm convinced it killed mine.

I went WOT as I approached a Stang, let off to sneeze at him and looked in the rear view to see a puff of smoke.

Next time I started giving it enough throttle a few seconds later to get the turbo spooling, the turbo sounded more like a super charger as it was starting to spool.

When you suddenly let off at WOT, all that unused boost comes back to the turbo and slams against it putting it under extreme stress. Do it enough and it wears the turbo out eventually to allow the wheels to contact the housing.

 

[meanchicken]

My new 6265 DBB turbo will have the S ported shroud which deals with the surge problem....a.k.a. horse sneeze...

 

[GullsGN]

The proper name for it is compressor slam. With a name like that it can't be good.

 

[meanchicken]

Post #49 on pg 2 of this linked post describes the compressor surge. Even at part throttle, it's not good on the turbo, so sneezing it at WOT full boost... it's definitely not good.
http://www.turbobuick.com/forums/tu...cision-turbos-new-turbo-listing-buicks-2.html