Why would you need more than the 60 psi the stock pump puts out??? Unless you plan on 800 hp, an aftermarket pump will be a waste of your hard earned money.

 

I talked to someone who is into making high horsepower trucks and he said trying to keep it street driven and drag race it that it could possibly break the cam.

I am leaving his name out of it cause ive only talked to him once.

 

i get anywhere from 25-40 psi in my truck.....ive got mine running off the top of the fuel filter housing.......

 

Someone more qualified than me will have to answer your question then....

 

The bleader screw on top of the fuel filter. thats where I have my fuel pressure gauge tap into at. Plus you dont have to drill and tap. Works just as good. plus its the same line as thier telling you to drill and tap.

 

Can you just take out the bleeder that is tapped into the top of the filter housing, run a small piece of line to a T, use one side of the T to feed the Fuel pressure gauge, and use the other side of the T as a bleed?

I want to get my fuel pressure gauge in to keep an eyes on things, but going for the fast route, also if you got with Tapping the Banjo bolt on the 7100, do you have to replace the crush wahers too? or can you reuse them?

thanks

 

When I bleed my system I just un screw it just alittle.

 

When you run yours off the top of the filter housing do you still need a valve in it???

 

Im upgrading to an airdog....

I can pull my stock LP down to 9psi and if you watch my dyno run you can tell I just dont have enough FP to support 500hp They will make 600+ and keep it running but may not be able to keep up after your on it for bit.

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wow old post my bad

 

ok i just saw this is a massively old post, from this info i see some say the stock lift pump is capable of putting up to 60 psi. in doing so would this hurt the injection pump? I've been researching forums, threads, and my service manual and the only thing i find as far as troubleshooting is for LOW pressure readings, nothing for too HIGH pressure.

i'm running around 45 psi, pressure relief valve is removed and spring is stronger than normal to give a higher pressure. I'm running just under 300HP. lift pump is stock and so is the injection pump and injectors. I'm running a #0 fuel plate and have NO fuel delivery problems. BUT when i hooked up my isspro fuel pressure gauge with a snubber banjo to the injection pump i though i would be getting the standard 17-22 psi at idle and 25-30 psi at 2500 rpms. the previous owner had done those mods to the lift pump over 5 years ago and i would think if this was a problem to feed the injection pump with too much pressure it would have already been a problem.

ALSO what am I doing wrong in the case that i have higher readings at less rpm and lower readings at higher loads? I'm tapped into the banjo which is closest to the firewall on the injection pump.

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found info needed, p pump optimum pressure is 31 psi and the use of an adjustable overflow valve is a much more legit way of controlling your pressure than pulling the OEM valve and increasing the spring tension. good to know and good to have found!