I'm at work and not with the best sound, but I really couldn't hear anything out of the ordinary...?

 

turn it up, you'll hear it. its like a loud whine.

 

I peg 1500* by the 1/8 mile and it takes well over a second or two to come off the peg after I finish the 1/4.

 

haha no water meth?

 

The boost hose going to the controller broke off on me the day of the drag race. Oh well. The water/meth doesn't stop the EGT's from rising nor does it drop them, it just delays the rise of them which works for me.

 

I havnt heard it first hand, but my truck made a sound alot like that when I had my BF/Smarty/EZ?? I am not saying thats a good thing but.....it sounded like that.

 

its 4 to 5 times louder than yours was!

 

So hows it running now?

 

42psi...no more noise, but it did stall and surge today more than usual.


need to turn it up a bit. 45 and i'll be happy.

 

I know that sound from experience. You have a mechanical problem with the turbo. Could it be a leak.......maybe, but I would lay money on it being the turbo. That sound brings back memories.

Bent shaft, bad bearing, etc.

 

I'm afraid so. II says send it in! Yea i think not....my stock turbo is 3 hours from here in storage.

SPEEDSHIFT (Bodie) tuned the wastegate down a bit and so far so good.

 

You are probably making a little contact with one of the housings or the shaft is a little tweaked and at higher rpm makes the 'siren or howling' noise because it is out of balance. You may be wondering; how, when did this happen, and what did I do? Forget it. Fix it and move on. Everything mechanical can fail. Forget about that stock turbo. Send it in, and expedite everything.

 

can't be without a truck right now, so i'll just keep going. I have alternative ideas...just no time til mid-May.

 

Totally understand. Here is a comforting thought: I bought my 1994 with a blown turbo. It made noise like yours and puked oil, bad. When I had my valves adjusted, the Cummins tech. called and said you need to replace this turbo NOW. When I got there, he said there was about 1/2" end play and thought the wheel would come out in his hand. His expression was: o

I said; give me the keys and we'll fix this in the near future and I'll keep my foot out of it. I have of course replaced it but have the original turbo and it does have about this much end play.

 

Have you pulled off the intake boot and checked for play yet? Sorry could not remember.

My guess is...based on how strong your truck has been running and how often you like to use that power...turbo is wasted. It does not take much to throw off something that spins 30,000 rpms on a film of oil.

62, 64, 66's (S300 based) don't live a long life on HEAVY fuel. They work nice...for a while...but don't last if you use that power daily.

Great tow turbo...and dyno queen, but not a 500hp plus daily driver.

Get it fixed...and upgrade the size a little...it will make it last longer the second time.

BTW...I was getting that same sound my last 1000 miles out of my A5k.