Y pipes

Reply Subscribe

Thread Tools

Search this Thread

Jul 2, 2014 | 12:58 PM

KIDkiser

Thread Starter

Laughing Gas

Joined: Jun 2011

Posts: 780

Likes: 5

From: Kentucky

Y pipes

I see sinister diesel makes y pipes with out the bellows,they just use slip joints. I wonder how long that would work on a daily driven truck?

Jul 2, 2014 | 01:07 PM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 60

I've read on .ORG those pipes leak like Niagara Falls until they heat up.

Might not be a good choice if you drive in the morning with heater on or windows down.

Josh

Jul 2, 2014 | 01:12 PM

KIDkiser

Thread Starter

Laughing Gas

Joined: Jun 2011

Posts: 780

Likes: 5

From: Kentucky

That's what I thought when I saw them.

Jul 2, 2014 | 01:14 PM

tex25025

Post Fiend

Joined: Oct 2005

Posts: 10,626

Likes: 7

From: Plano TX and Brentwood TN

Quote:

Originally Posted by Bullitt390

I've read on .ORG those pipes leak like Niagara Falls until they heat up.

Might not be a good choice if you drive in the morning with heater on or windows down.

Josh

Leaking y-pipes will also cause considerable power loss and astronomical EGT readings as well.

I can not think of any reason why they should be leaking at any time. If they are, even if only before they heat up, I can't see that as a good design.

Quote:

On our 6.0 Up-pipes we have opted to get rid of the bellows in favor of a much stronger, longer lasting "double slip" flex joint. In turn, there are now, no bellows to heat fatigue and crack. It will still allow the upper, and lower sections of the Y-Pipes to flex and move due to heat expansion, while maintaining a 100% seal.

That doesn't bode well if they do leak at any one point of time and it seems to be a consistent thing.

Jul 2, 2014 | 01:35 PM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 60

It's hard to beat the heavy duty Vibrant flex joints.

I would consider the OEM Ford joints a semi-flex as they are really slip joints with the accordion outer layer

Josh

Jul 2, 2014 | 01:42 PM

tex25025

Post Fiend

Joined: Oct 2005

Posts: 10,626

Likes: 7

From: Plano TX and Brentwood TN

Quote:

Originally Posted by Bullitt390

It's hard to beat the heavy duty Vibrant flex joints.

I would consider the OEM Ford joints a semi-flex as they are really slip joints with the accordion outer layer

Josh

I didn't run a delete on my truck, so I couldn't use this anyway (I do believe that these require a delete to run), but I had no problem with the Ford pipes on my truck and it flowed some heat (more then most on here). I wouldn't use pipes that were known to leak, even if was just until it got warmed up.

That just doesn't seem right to me at all.

Jul 2, 2014 | 03:08 PM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 60

Quote:

Originally Posted by tex25025

Technically the exhaust manifolds can leak at the cylinder until they heat up and expand.

Another minus for those pipes is guys having a hard time lining up the turbo.

Josh

Trending Topics

My 1976 F-250

3.9k

263.6k
7.3 or/vs 6.7

27

947
Header tube temp question.

18

301
Another Crank no start -- sorry

29

568
This is prolly a 1 page thread at most

110.3k

6M

Jul 2, 2014 | 04:32 PM

tex25025

Post Fiend

Joined: Oct 2005

Posts: 10,626

Likes: 7

From: Plano TX and Brentwood TN

Quote:

Originally Posted by Bullitt390

Technically the exhaust manifolds can leak at the cylinder until they heat up and expand.

There is a difference in my mind between something that can happen versus something that will happen. A lot of things can happen, but that doesn't mean that they will happen. Now when you mention the next thing:

Quote:

Originally Posted by Bullitt390

Another minus for those pipes is guys having a hard time lining up the turbo.

Josh

That moves from can happen territory closer to will happen territory. I know when my a/m turbo and pedestal had a hard time lining up to the block, it would leak oil (pedestal also would have the oil flow through, neat idea I though). Anything that doesn't properly line up is going to have a leak. Now depending on how skewed that lineup is, will determine if expansion helps slow it down (or stop it completely). But, it still shouldn't be like that.

However, if that's true that the pipes don't line up correctly that is a fundamental design flaw, just like it was initially with my turbo (or an issue somewhere in the manufacturing process that isn't correctly translating that design to physical production).

That's the risk that you take sometimes with a/m. Some just don't have the R&D behind it as much as other places.