Vibrant performance bellow pressure rating - Competition Diesel.Com

jasonc · 11-26-2017, 06:55 AM

I'm going all vband on my charge pipes and I already run solid engine mounts. I want to run a bellow in the charge pipe going to the intercooler from turbo's and found vibrant part# 68834 which is for 3" pipe. I've looked all over and can't find any pressure rating for the bellow. Will it work? Or any other brand I should use. Will be seeing over 100lbs. Thanks

BC847 · 11-26-2017, 10:18 AM

I run one of those on the hot-side of my mess. That particular model includes a sleeve on the interior that keeps the moving stuff off the rough profile of the bellows. (Attached on the inlet end, floating on the outlet end).

- In my application, the only movement the bellows accommodates is mostly thermally driven so I can't speak for the overall range of movement.
- While the measurements are 3" ID for the inlet and outlet, that internal sleeve has things neck down perhaps a quarter of an inch or so.
- IIRC, the thing is not thick-walled. Maybe 20ish gauge or there abouts.
- 304 stainless steel construction.
- It is my belief the thing is NOT made to withstand substantial/constant flexing as in that sense, work-hardening will result in the bellows fracturing.
- From my point of view, I think, it could comfortably and reliably accommodate perhaps 10* of flex (The internal sleeve limits that), maybe 1/4" expansion/contraction, and absolutely NO torsional movement.
- My application has the thing deal with around 60(?) psig of 1000*f exhaust gas.

Over all, it appears well constructed and if kept within a reasonable range of movement, it should work OK for a while. We'll see.

IIRC, they are available with and without the internal sleeve, as well as with or without an external braided SS sleeve.

Hope this helps.

USARMY12V · 11-26-2017, 03:29 PM

Out of curiosity why don’t you have a radiused interstage pipe? Just using that for time being?

BC847 · 11-26-2017, 04:33 PM

Turning vanes inside.

xDiesel03 · 11-26-2017, 06:46 PM

I had that in my original Firepunk Compound setup. It held around 100psi just fine. However, I recommend you use Vibrant Vanjen clamps if you are still sourcing the parts. The vanjen clamps are tested to 200psi and facilitate engine flex.

I was using the BD Boost Lock Kit on the manifold inlet, but after I switched injectors and secondary from a .91 to 1.0 it bent and broke, taking out a power steering line in the process. Firepunk set me up with Vanjen connections at the turbo outlet and intake manifold inlet. Still running regular boots at both intercooler connections.

97rada · 11-26-2017, 08:22 PM

If you use it wire it tight. I suggest there hd clamps with built in movement at 900 psi rating or something crazy

jasonc · 11-27-2017, 05:23 AM

Thanks guys, ordering their clamps to go with it now.

11-26-2017, 06:55 AM	#1
jasonc Name: jasonc Title: Too Much Time Status: Not Here Join Date: Nov 2009 Member`s Gallery Posts: 4,412	Vibrant performance bellow pressure rating I'm going all vband on my charge pipes and I already run solid engine mounts. I want to run a bellow in the charge pipe going to the intercooler from turbo's and found vibrant part# 68834 which is for 3" pipe. I've looked all over and can't find any pressure rating for the bellow. Will it work? Or any other brand I should use. Will be seeing over 100lbs. Thanks

11-26-2017, 10:18 AM	#2
BC847 Name: BC847 Title: Too Much Time Status: Not Here Join Date: May 2006 Member`s Gallery Posts: 851	I run one of those on the hot-side of my mess. That particular model includes a sleeve on the interior that keeps the moving stuff off the rough profile of the bellows. (Attached on the inlet end, floating on the outlet end). - In my application, the only movement the bellows accommodates is mostly thermally driven so I can't speak for the overall range of movement. - While the measurements are 3" ID for the inlet and outlet, that internal sleeve has things neck down perhaps a quarter of an inch or so. - IIRC, the thing is not thick-walled. Maybe 20ish gauge or there abouts. - 304 stainless steel construction. - It is my belief the thing is NOT made to withstand substantial/constant flexing as in that sense, work-hardening will result in the bellows fracturing. - From my point of view, I think, it could comfortably and reliably accommodate perhaps 10* of flex (The internal sleeve limits that), maybe 1/4" expansion/contraction, and absolutely NO torsional movement. - My application has the thing deal with around 60(?) psig of 1000f exhaust gas. Over all, it appears well constructed and if kept within a reasonable range of movement, it should work OK for a while. We'll see. IIRC, they are available with and without the internal sleeve, as well as with or without an external braided SS sleeve. Hope this helps. __________________ Original owner of a VE fueled 1993 W250 ClubCab. Silencer ring MIA, str8 pipe with 10" exhaust tip, 250psi boost gauge, ghost-lights 'n truck-nutz. K&N air filter next (if my grades are good enoufh). Last edited by BC847; 11-26-2017 at 10:24 AM.*

11-26-2017, 03:29 PM	#3
USARMY12V Name: USARMY12V Title: Rally round the Virginian Status: Not Here Join Date: Jan 2012 Location: Virginia Member`s Gallery Posts: 711	Out of curiosity why don’t you have a radiused interstage pipe? Just using that for time being? __________________ -Chris "God gave them 24 for those too dumb to use 12." Be a happy dinosaur 1998 QCLB 5.9 Auto Under the Knife 2010 MCSB 6.7 68RFE Draconian MCC soon to be EFI, Deleted

11-26-2017, 04:33 PM	#4
BC847 Name: BC847 Title: Too Much Time Status: Not Here Join Date: May 2006 Member`s Gallery Posts: 851	Turning vanes inside. __________________ Original owner of a VE fueled 1993 W250 ClubCab. Silencer ring MIA, str8 pipe with 10" exhaust tip, 250psi boost gauge, ghost-lights 'n truck-nutz. K&N air filter next (if my grades are good enoufh).

11-26-2017, 06:46 PM	#5
xDiesel03 Name: xDiesel03 Title: Diesel Enthusiast Status: Not Here Join Date: Oct 2013 Member`s Gallery Posts: 225	I had that in my original Firepunk Compound setup. It held around 100psi just fine. However, I recommend you use Vibrant Vanjen clamps if you are still sourcing the parts. The vanjen clamps are tested to 200psi and facilitate engine flex. I was using the BD Boost Lock Kit on the manifold inlet, but after I switched injectors and secondary from a .91 to 1.0 it bent and broke, taking out a power steering line in the process. Firepunk set me up with Vanjen connections at the turbo outlet and intake manifold inlet. Still running regular boots at both intercooler connections. __________________ 2003 2500 QCSB 4x4 3.73 - Firepunk HPT Tuned, BBI Stage 2's, DAP 63/68/12, Hamilton [624/1050 and 680/1206 with Water/Meth] 2012 2500 CCSB 4x4 3.73 Firepunk EFI and Comp3, D&J Built 6.7L, S&S 200%, ATS Dual CP3 w/ Exergy 12mm, S366/S483 Compounds [1086/2289]

11-26-2017, 08:22 PM	#6
97rada Name: 97rada Title: Too Much Time Status: Not Here Join Date: Feb 2008 Member`s Gallery Posts: 5,410	If you use it wire it tight. I suggest there hd clamps with built in movement at 900 psi rating or something crazy __________________ Austin tow truck- 14-3500 with tuning toy truck -94 rclb auto- 5.2x with a lot left. Shooting for 4s Any intelligent fool can make things bigger and more complex...it takes a touch of genius- and alot of courage to move in the opposite direction.

11-27-2017, 05:23 AM	#7
jasonc Name: jasonc Title: Too Much Time Status: Not Here Join Date: Nov 2009 Member`s Gallery Posts: 4,412	Thanks guys, ordering their clamps to go with it now.