I change my fuel filters regularly and never noticed a change right after, I'd have to say it was the BB if you saw a change. But that's just my opinion.

 

I see a difference every time I change my fuel filters.

 

I had about 15k on them they were due

 

Don't wanna bore anybody with fluid dynamics or laws of physics but I gotta ask......

"As pressure increases, volume decreases ???? Volume typically is considered FLOW (unless we are talking about standing/tank volume) and we are not. So if your thinking as pressure increases, volume/flow decreases I can't figure that one out but am always willing to learn. Just don't break the laws of physics, they keep me outta trouble

The REAL POINT of this mod is controlling how much pressure remains available at the fuel rail and how much gets sent back to the fuel tank.

 

In fliud dynamics it is true that when pressure goes up, velocity/flow go down (play with the model at Bernoulli's Principle Animation ). This is true in a tube/piping, carb venturis, and jet engines.

However, all things being equal, the two easiest hp gains for a motor are more timing and more fuel pressure. Don't believe it, watch the psi in ANY fuel injected vehicle, diesel or gas, it will rise as power goes up to meet the demand. Upping the psi on a one wire 12V Cummins is the most common upgrade.

Sometimes you have to just nod your head in aknowledgement that it works and try not to figure out why.

 

BOTH you and Bernoulli are/were very smart dudes but......

I don't think the model is applicable to a 'dead-headed' system. Without the bypass/relief valve and return line the fuel pump would be pumping against a closed pipe/sytem with the only flow being allowed when an injector opened for its microsecond to allow it to fill. So, without pulling out my calculator and just scratching my butt I figure the higher the presure the quicker the fill of the injector. THEN the HPOP can do its job and we have some real pressure where it counts !

 

ok i talked to a shop on it a little and he said if you have a 6.0 that i taking out injectors left and right they are putting stiffer springs in them he said it seams to cure the problem.or you can go cheeper and do a bb mod. sounds like a good deal to me.

 

EDITED*

LocoMike I'm on the same page as you, I think we're just trying to explain it differently. My main point was if you are not having issues now with filling the injectors, adding more pressure isn't going to do anything.

A fuel pressure gauge would be the key!

 

Very good advice on the gauge. I, like most have done hundreds of dollars of 'cosmetics, to my truck. the fact i didn't invest in a fuel pressure gauge and an EGT monitor ended upcosting me thousands....

IDP sells a new fuel filter capwith a gauge port. I went with the adaptor line but wish I had done the 'cap'.

"To Me', a fuel pressure gauge is a cheap investment.

 

Anyone who has changed a fuel plate, increasing the fuel psi and power, in a Cummins would argue that point with you. You yourself admit that you can feel new fuel filters. That in itself would be an indication of power through better fuel psi.

Wanna see your truck run like crap, lower the fuel pressure...

Now a gauge would be a great idea, I'm thinkin that I like that billet fuel gauge adapter.

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DO you have anymore details? Who is IDP, do you have a part number or reference? A fuel pressure gauge would be worth putting up a pillar mount in my truck.