How the hell does this happen!?

[annoyingrob]

Since I put my GT40-88 on my 1JZ, the car has been getting laggier and laggier. First it hit full boost around 4200, then it started going up, and up, and up, until I wasn't hitting full boost until about 6500rpm. I knew something was wrong, but could not find a leak anywhere.



Then for the hell of it, I decided to take off the coupler right on the turbo, you know, just to make sure that it was on tight....

HOW THE HELL DOES THAT HAPPEN? The hole was on the underside, near the exhaust manifold. I could not see it at all. Maybe there was a small tear that worked its way apart after so much boost, or maybe a squirrel got hungry or something.

Sheesh. At least now I know why my car's been so laggy. Funny thing was the turbo still happily put out 18psi

 

[Ckanderson]

God hates you.

 

[johnathan1]

Exhaust manifold melted it?

 

[annoyingrob]

At first that's what I thought, but it's not melted at all, its ripped out. I was told these things can handle a LOT of heat too.

 

[Nomad707]

God hates you.

ROFL!


yeah.. that sucks. my accordian hose had a hole in the bottom of it, took it off one day and was like uhhh... then i looked around to make sure no one saw. lol.

 

[CRE]

Nah, that's not the problem... the turbo's trashed. Might as well send it to me so I can get the metal recycled.







The tearing probably started when a hole was made by either a manufacturing defect (bubble), a bur on the underlying pipe, or possibly even something as random as a mouse chewing a small hole into it, The boost did the rest.

 

[Nick M]

Karma can be punishing.

 

[Justin]

if you were reading 18psi at the manifold, wouldn't that mean the turbo is putting out an assload more, as a huge amount is going to the atmosphere?

 

[bigaaron]

I would wrap it with exhaust wrap next time, they can take some heat, but if it's right next to the manifold it will eventually fail.

 

[MK3Brent]

That's funny... I remember seeing your post on SF about it too.

 

[OneJSupra]

LOL...now that's annoying :biglaugh:

 

[Ric]

owned by ebay.

That's why we weld aluminum elbows and extentions to the turbo outlet, to put the silicone away from the heat.


Goto a diesel truck store and get a straight section of industrial rated radiator hose used on semi trucks. It's stronger then any silicone.

 

[MDCmotorsports]

owned by ebay.

That's why we weld aluminum elbows and extentions to the turbo outlet, to put the silicone away from the heat.


Goto a diesel truck store and get a straight section of industrial rated radiator hose used on semi trucks. It's stronger then any silicone.

Exactry.

 

[MK3Brent]

What I did for my 4088 is just wrapping the manifold with heat wrap, and then use a HTS coupler. Mine didn't melt.

HTS is expensive though.

 

[MmmBoost]

the hole was on the underside, near the exhaust manifold

think you answered your own question, lol

 

[lagged]

being in calgary i dont know how many marine parts stores you have near you, but they sell very good rubber exhaust piping. you can cut a piece of that to use as a coupler and it will last for years.

 

[Ric]

being in calgary i dont know how many marine parts stores you have near you, but they sell very good rubber exhaust piping. you can cut a piece of that to use as a coupler and it will last for years.

It's the same thing as the semitruck radiator hose. It's if God himself made turbo couplers. Only the ones that are visible are Silicone (front mount), the rest on my car are the good stuff.

 

[lagged]

It's the same thing as the semitruck radiator hose. It's if God himself made turbo couplers. Only the ones that are visible are Silicone (front mount), the rest on my car are the good stuff.

yes that shit is ideal for intercooler couplers.

to anyone not familiar with this stuff, not only can it take the heat, but its reinforced with metal wire and it does NOT expand or deform.

its also expensive, about 8 dollars a foot usually, but its worth it. comes in many IDs so you can make it work for your setup.

 

[Ric]

3" i can get for around $6 a foot, smaller runs a bit cheaper. Locally. In my 7 years of owning turbo cars, I have never seen one of these break used as a turbo coupler. I've gone through ALOT of silicone pieces.

 

[annoyingrob]

if you were reading 18psi at the manifold, wouldn't that mean the turbo is putting out an assload more, as a huge amount is going to the atmosphere?

Sure would. It's a big turbo though, it had no problem pumping all that air to atmosphere