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6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine

Frantz bypass kit

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Old May 26, 2025 | 05:22 PM
  #16  
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Originally Posted by bak20042
I still get decent flow coming back into the engine from the bypass kit
Yes, but is more flow than it should be? Again bypass filtration needs low flow to work correctly and not pull too much oil from the main system and is generally restricted on the outlet side of the filters, you may have opened up that restriction.
More flow through the bypass system is not a good thing.
 
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Old May 27, 2025 | 08:22 AM
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Increasing the outlet diameter should have very minimal impact on the oiling system or bypass filtration. I run the SPE Oil Filter manifold and see a 2psi decrease but a 12% increase in volume at the turbo oil feed. After adding the bypass oil filter no perceivable difference in pressure was seen, but, I have not done another flow/volume test since I borrowed the flow meter.
 
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Old May 27, 2025 | 09:15 AM
  #18  
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Originally Posted by F250_Super_4X4
Increasing the outlet diameter should have very minimal impact on the oiling system or bypass filtration. I run the SPE Oil Filter manifold and see a 2psi decrease but a 12% increase in volume at the turbo oil feed. After adding the bypass oil filter no perceivable difference in pressure was seen, but, I have not done another flow/volume test since I borrowed the flow meter.
should I drill it a bit bigger, I believe I have a little room left, or do you think I’ll be okay?
 
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Old May 27, 2025 | 09:16 AM
  #19  
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Originally Posted by F250_Super_4X4
Increasing the outlet diameter should have very minimal impact on the oiling system or bypass filtration. I run the SPE Oil Filter manifold and see a 2psi decrease but a 12% increase in volume at the turbo oil feed. After adding the bypass oil filter no perceivable difference in pressure was seen, but, I have not done another flow/volume test since I borrowed the flow meter.
How are you reading those?
 
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Old May 27, 2025 | 09:22 AM
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Originally Posted by bak20042
should I drill it a bit bigger, I believe I have a little room left, or do you think I’ll be okay?
Personally I would leave it. I would be weary of work hardening the outlet adapter causing it to become brittle creating an issue with hot/cold contraction.
 
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Old May 27, 2025 | 09:50 AM
  #21  
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Originally Posted by F250_Super_4X4
Personally I would leave it. I would be weary of work hardening the outlet adapter causing it to become brittle creating an issue with hot/cold contraction.
gotcha, truck has been running good, I’m probably just overthinking ****, frantz claims it doesn’t decrease flow or pressure and I’ve made it bigger so
 
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Old May 27, 2025 | 10:28 AM
  #22  
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I also doubt the adapter you drilled out is a significant restriction.
You could try shutting off the bypass flow to see if the typewriter noise fades away. Could add a small inline ball valve or pinch the hose with a hose pinch clamp to do that test. I’ve been rethinking bypasses for a while and, if you run through the math starting with fresh oil, you only need to bypass a small flow (3% is plenty, or about 1/2 gpm on the 6.7) to maintain +2um particulate to nearly zero.
Just curious, what is the ID you drilled out to and the ID of the OEM adapter?
I’d also be interested to know what instrument you used to measure turbo oil flow F250_Super_4x4?
 
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Old May 27, 2025 | 11:45 AM
  #23  
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Originally Posted by Overkill2
How are you reading those?
Originally Posted by Gladstone
I also doubt the adapter you drilled out is a significant restriction.
You could try shutting off the bypass flow to see if the typewriter noise fades away. Could add a small inline ball valve or pinch the hose with a hose pinch clamp to do that test. I’ve been rethinking bypasses for a while and, if you run through the math starting with fresh oil, you only need to bypass a small flow (3% is plenty, or about 1/2 gpm on the 6.7) to maintain +2um particulate to nearly zero.
Just curious, what is the ID you drilled out to and the ID of the OEM adapter?
I’d also be interested to know what instrument you used to measure turbo oil flow F250_Super_4x4?
Inquiring minds want to know bruh...
 
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Old May 27, 2025 | 11:46 AM
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Originally Posted by Gladstone
I’d also be interested to know what instrument you used to measure turbo oil flow F250_Super_4x4?
I do not know, I have a friend who is one of the mechanics for a pro stock drag car who has one. They use it for fuel and oil flow under max RPM and Load. Its a box with bluetooth to a monitor that shows flow, pressure and Delta from an upstream or downstream location.
 
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Old May 27, 2025 | 12:02 PM
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Originally Posted by F250_Super_4X4
I do not know, I have a friend who is one of the mechanics for a pro stock drag car who has one. They use it for fuel and oil flow under max RPM and Load. Its a box with bluetooth to a monitor that shows flow, pressure and Delta from an upstream or downstream location.
Wow... high tech, man, with custom PID formulations... nice.
 
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Old May 28, 2025 | 09:35 AM
  #26  
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Originally Posted by F250_Super_4X4
Increasing the outlet diameter should have very minimal impact on the oiling system or bypass filtration. I run the SPE Oil Filter manifold and see a 2psi decrease but a 12% increase in volume at the turbo oil feed. After adding the bypass oil filter no perceivable difference in pressure was seen, but, I have not done another flow/volume test since I borrowed the flow meter.
Now I'm looking into that SPE oil filter housing... I like those larger ports for more flow, hence more oil pressure under throttle applications.

Really am more interested in the housing itself than the Cat filters, truthfully. But there'd be no running an OEM sized filter on their housing.
 
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Old May 28, 2025 | 10:12 AM
  #27  
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Originally Posted by Overkill2
Now I'm looking into that SPE oil filter housing... I like those larger ports for more flow, hence more oil pressure under throttle applications.

Really am more interested in the housing itself than the Cat filters, truthfully. But there'd be no running an OEM sized filter on their housing.
I’ve read the cat filters don’t have the anti drain back valve like the motorcraft to prevent dry starts
 
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Old May 28, 2025 | 11:23 AM
  #28  
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Originally Posted by bak20042
I’ve read the cat filters don’t have the anti drain back valve like the motorcraft to prevent dry starts
The pump is the anti drain back mechanism.
What they do not have is a bypass on them which causes many people concern in very cold regions.
 
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Old May 29, 2025 | 07:47 AM
  #29  
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Originally Posted by bak20042
it has 5w-40 and about 4k on oil, also with two quarts of Lucas in to help with oil starvation on cold starts, I was thinking the same thing with the bypass filtering out all the soot and brand that the oil is so clean that it’s not masking the noise, just wanting to make sure I’m not hurting anything by running the frantz by pass kit
On the next oil change I would skip the Lucas.... that stuff is crap. Nothing but super heavy basestocks with nothing in the additive package:




A complete scam.
 
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Old May 29, 2025 | 10:31 AM
  #30  
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Here is some good data on the CAT Filters w/ adapters for the 6.7L
 
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