I am running at idle 57psi....and at WOT (with a tuner) at 50-51 psi. I have the updated rebuild kit and plan to install it soon. I heard that it NORMALLY bumps the psi up about 10 psi....which would put me at 67 psi and 60-61 at WOT.

I read that 75 psi is max for injector oring integrity....does this sound correct and am I safe to install the updated kit?


Thanks
Joe

 

Sounds to me like you NEED to install the updated kit. I think you'd be UNSAFE otherwise.

 

Just to be safe do not go past 70psi. Not every truck is the same.

 

Ok sounds great....as it stands now, until I install the pressure kit I don't really jump on it too hard. I know that 45 psi is a big no no in pressure drops so for now I am ok with my pressures until I install the kit.

Thanks

 

not to hi-jack, but at idle i have about 62 fuel psi. under WOT accel from a stop running Elite diesel Insanity tune, psi drops to about 30 for a split second when the truck hits 2nd gear. Obviously i chopped the throttle, and i have only done this once. This drop only happens from a DEAD STOP WOT run. Whats my problem? BTW, i have the longer blue regulator spring already in.

 

How many miles is on your truck?

You are not getting enough flow. Rule of thumb is not to go below 45psi

Do you have any modifications to your fuel system?

 

haha just kidding.


I will install the kit and see how much it raises the pressure.

 

I have plans to buy the larger feed lines from trustedperformance BUT some have said that by drilling out the two banjo bolts on the front of the heads for the feed lines will give me the flow I am looking at achieving......has anyone heard of this?

I thought the check valves in the banjos were needed????

 

There are 65 000mi on the truck.

I don't have any fuel system mods.

 

When was the last time you changed your fuel filters?

 

If you don't see a change after new fuel filters, your HFCM may be getting weak. That, or it just can't keep up with the demand, and you'll need to go another route. Bigger fuel lines do nothing to help maintain pressure. It's actually more work for the stock pump to get the pressure up with a larger volume to deal with. Bigger lines do help if you have a pump capable of flowing more fuel.

Anyone running strong tunes should have a fuel pressure gauge. Constant low fuel pressure conditions can ruin 6.0 injectors.

 

-Bigger lines do help if you have a pump capable of flowing more fuel.


Absolutely true, but larger lines aren't a benefit with a stock HFCM? According to trustedperformance their lines are good for vehicles with a stock HFCM running 120HP over stock

 

guys whats causing the dump in pressure is the regulator dumping when the truck shifts. Its normal.

 

cheezit,

what about this posting question I have in regards to increasing the line diameter of the feed lines for the heads?

 

sorry I missed that...
Ok the stck bolts and lines work fine with a stock pump. If you were going to something like an ADII then I would think about it at that time.
Heres the math the way I see it.
volume goes up = pressure goes down.
so to be effective you would need to figure out what the volume incress would need to be then figure out if the pump will do it.

also for what its worth I still have stock lines and banjo bolts. not had any issues related to it yet.