Fuel Pressure too high?

[fuzzman]

May have jumped the gun here.

When I had my fuel pressure regulator out Iput a BB behind the spring to increase spring tension like the blue spring mod. Before putting everything back together I put in the equipment I need to monitor fuel pressure. So now that I have fuel a fuel pressure gauge I'm wondering if my pressure is too high.

I'm getting about 68 psi. What's too high?

Thanks for any insight

[Tuscany]

Your good! If it spikes over 75 and stays there then you got problems.

[fuzzman]

Appreciate the response. Nice to know my "improvement" won't cause problems!

[Karls03]

Originally Posted by Tuscany

Your good! If it spikes over 75 and stays there then you got problems.

Not necessarily. Many people, including myself, have used the Gillette Diesel spring that cranks idle/cruise psi up in to the high 90s. However, at WFO, it drops back to Blue Spring ranges (~mid 50s). Mine was in for about 2 years, then I wanted to see what all of the excitement was over the Blue Spring. All that I saw was a lower cruise/idle psi compared to the Gillette spring.

Keep in mind that I run an OEM fuel system. I have no clue what that kind of pressure would do to an AD2 or other RR system.

[Tuscany]

The gillete sprin has been proven to be detrimental in "most" trucks. That's why they got rid of it and went with the blue spring.

[Term3]

It's idle pressure like this that scares most guys off using the Gillette spring.

[thomaslord84]

Originally Posted by Term3

It's idle pressure like this that scares most guys off using the Gillette spring.
Attachment 45230

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[OCVeloMan]

I have a blue spring in mine and i was getting 65psi, one day it jumped to 80psi and it's pretty much stuck there now... Truck runs like a dream but I rarely see under 75psi.