Hey what's up guys, I installed my 3" DP to my 60-1 last night, but I used Ultra Grey by accident. It was such a PITA to get the lower bolts started, because there's not much clearence next to the flange and pipe, that I didn't realize I was using ultra grey... Anyway, I had a brand new tube of Utra Copper that I specifiaclly purchased for the DP to Trubo connection but I spaced it out. Anyway, I'm thinking I should just pull the DP off and re-do it with ultra copper, before I go any futher, but I was wondering if anyone has succefully used utlra grey on there DP, without leaking issues... Thanks.

 

thats actually what i used on mine no leaks yet with probably 5-600 miles

 

Eventually the gasket maker will errode away from the heat.. You can always fix it again when it actually leaks.

 

^^ what do you recommend

 

might as well wait till you have problems....or the next time you have to pull it off for something

 

The silicone is only rated for a few hundred degrees before it breaks down (from gooey to ashy). However when its clamped in place, the burnt material isn't going anywhere, and any tiny leaks will fill with soot quickly. It will also make cleanup a snap, as you just wire-brush the ashes off.

 

Yes it will leak, turbine housings can exceed 900 degrees, and it's under substantial pressure. Might as well use bubble gum. There's a reason they don't even recommend normal graphite exhaust gaskets off the turbine housing...

 

Depending on setup, there can be almost no pressure on the turbine housing discharge side...

I had under 0.5 PSI of pressure at the downpipe exit on my Supra with 5" DP and exhaust... So really, depending on setup and how flat the sealing area is, he may never have a problem at all. Hell, I don't even use gaskets on turbine housing inlets and outlets as long as the sealing surface is nicely machined flat and has a nice beefy sealing surface area.

 

That's true, a properly machined surface you can get away without a gasket in theory and according to the engineers at Garret, but EVERY SINGLE TURBO i've seen eventually starts leaking - it's just a matter of time....

Lack of back pressure on a 2JZ motor is not unusual with a big turbo since the power curve is shifted so far to the right that you simply are not running into any back pressure issues as you're really only using a sliver of the power curve of that particular diesel turbo. On a turbo car with a broader power curve you will usually run into pressure issues downstream of the turbo. My 33 would often blow gaskets with twin 3037's on a 4" pipe....

 

You gotta see my sig... It's an HKS T51R SPL, not quite your average diesel turbo

The turbo can't even use a gasket...lol It's a V-band... I was just playing with you because you seem to reply almost every single thread I've posted in recently. I was thinking if you were a noob who just registered and started stalking me...

I am running 34 PSI on this thing, it better be using that turbo up quite a bit because I am pushing about 908 WHP on a turbo rated for 1000PS, and cracking out 600+ lbft of torque.

 

Ah I'm just here trying to get some SEO exposure for one of my new companies (in my sig).

I've long been out of the car industry, but if you ask any of the senior guys at HKS japan they will tell you very much that the T51R "SPeciaL" is a diesel turbo - I was just teasing you about that . The first 3 generations had such substantial oiling issues that multiple cars blew up and it was fairly embarrasing.

That said, I've never really played with the 2JZ cars at those power levels, I'm very surprised at 34psi you have no back pressure issues.

Cheers

 

The T51R is not special in anyway, just a fancy compressor cover, a V-band turbine housing, and about 22-23 lbs lighter than your typical GT42R, that's all. I just like it because it has an HKS manifold, all ready to bolt onto my Supra. Well, I am only glad that never came from a diesel, was never made for a diesel, and won't fit any diesels either. In terms of failure, I think you got me beat though. I don't even know long ago that Garrett actually had trouble with a common oldschool single BB CHRA... The kit I have was probably about 8 years old, so I have no clue on the generation anyway.

 

Ive never used gaskets, I just make sure all the surfaces are flat. No leaking either. The turbo im using now is Vband discharge, that's the way to go. OP, if you have a lot of trouble, you could always have a vband welded to your exhaust housing, you will love how much nicer it is in tight spaces as well.