What was that noise? - Diesel Forum

Rudolf_Diesel · 10-29-2007, 10:28 PM

I was towing, well attempting to anyway, to our usual riding spot this weekend and I kept blowing an intercooler hose. I actually have three hoses from the turbo to the hot side of the IC and it was the middle hose. It would blow off every time I got past 12 lbs. of boost. I finally had to use crazy glue to help with the clamps. I will definitely be making a one piece and weld all joints. The last one blew half way up the Cajon Pass. I was doing 60 towing my fiver and a 12 ft enclosed and then the EGT's hit the red zone and the smoke was as black as could be. I had to finish the rest of the way doing about 30 and getting passed by Dodges and Chevys, how embarassing. There was no turning off - no shoulder and it really sucks climbing a hill without a turbo. When the hose blew off it made a loud whoosh and of course I lost all my precious boost.

After the big hill I really poured on the super glue and all seemed well for the rest of the trip. I was doing fine, but still babying the truck. I was carefully listening to make sure I didn't blow off the hose again and that is when I noticed the sound. It sounded like a blowoff valve in bewteen shifts, I thought at first I lost the hose again, but the super gloue did its job. Any clue as to what this noise might be, is it surge?

johndeerebones · 10-29-2007, 10:51 PM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rudolf_Diesel</div><div class="ubbcode-body">I was towing, well attempting to anyway, to our usual riding spot this weekend and I kept blowing an intercooler hose. I actually have three hoses from the turbo to the hot side of the IC and it was the middle hose. It would blow off every time I got past 12 lbs. of boost. I finally had to use crazy glue to help with the clamps. I will definitely be making a one piece and weld all joints. The last one blew half way up the Cajon Pass. I was doing 60 towing my fiver and a 12 ft enclosed and then the EGT's hit the red zone and the smoke was as black as could be. I had to finish the rest of the way doing about 30 and getting passed by Dodges and Chevys, how embarassing. There was no turning off - no shoulder and it really sucks climbing a hill without a turbo. When the hose blew off it made a loud whoosh and of course I lost all my precious boost.

After the big hill I really poured on the super glue and all seemed well for the rest of the trip. I was doing fine, but still babying the truck. I was carefully listening to make sure I didn't blow off the hose again and that is when I noticed the sound. It sounded like a blowoff valve in bewteen shifts, I thought at first I lost the hose again, but the super gloue did its job. Any clue as to what this noise might be, is it surge? </div></div>

Is it just the turbine spinning down? If you're pulling and making high boost numbers you would here it more. Since I have a gutted EBPV it is extremely pronounced when making big boost. Exactly like you say, obviously we don't have BOV and don't need em, but somewhat similar noise...

ISTOCK51 · 10-29-2007, 11:52 PM

I was towing my racecar when I blew off an intercooler hose with a big bang. I didn't snap immediately to what had happened and about crapped my pants.

Don in Austin

Big_Dan97 · 10-30-2007, 01:00 AM

About crapped your pants, I think I actually did when mine blew off, sounded like my .45 going off popped off right around 20 lbs, I was really in it. Sad to say I almost puked. It scared me and I aint scared of nothin!
anyways my best guess is the same as johndeeres, turbo spoolin down.

Nit · 10-31-2007, 10:22 AM

nope it compressor stall that you hear, mine sounds just like a blow-off valve at 25psi, it is not good for the turbo either but sounds cool. What happens is the air is rushing into teh heads at a high rpm then you shift teh rpm drops but the air is still going like hell so it hits a wall adn backs up to the turbo and stalls out teh compressor blades till teh rpm adn your demand for intake air increases