How do you shim the fuel pressure regulator? What do the shims look like and where you you purchase them?


Thanks, Krokus -

Krokus_96F350's Sig:

My Most Important Modification To Date, The HPX Mod

The "shim" is actually a BB...shot out of a BB gun. You shim the spring in the FPR to put out 60-65 psi of fuel pressure. If i am correct.. -

PSD's Sig:

97 F250 Powerstroke 7.3 -- 4" lift -- 16.5" Weld Racing Rims -- 33" BF Goodrich A/T -- 3.5" Downpipe, 5" Stacks -- 10K Mod -- Boost and Trans. Temp. -- Banks Compressor Wheel -- Work in progess...

Thanks. Sounds simple enough. I'll give it a try next oil change. -

Shimming the fitting with a 3/16 spacer behind the spring in the fuel regulator. This is located on the right hand side of the fuel filter. You will see a 3/4 brass nut there. The spring is inside there. Shimming will raise the fuel pressure and often give you a worthwhile increase in power and no one that I can recall has reported higher fuel consumption. -

Whit's Sig:

* 01 Cummins/Dodge/HO/6 speed*275 injectors*PDR 35 turbo w/14cm housing & high pressure boots*HTT 3 piece ported exhaust manifold*Progaurd 7 with prefilter*Edge Comp*Fass II*Southbend con OFE*Jacobs brake*5"Stacks Big ens*E/F shift knob w/2low & brake switch*10 Gages*KW Ram air System cab controlled*Rickson 19.5x265's*True speed calibrator*Rancho 9000's*DT track bar*DSS steering stabilizer*KW Side impact rails*KW Traction Bars*Toolbox/fueltank 60 gal Combo*Mag High Tech Diff Cover*Ranchand bumpers*Grover air horns*Rear Wheel Cylinder Upgrade DYNO 375 Horse 941 Torque

Always remember...when life hands you Lemons,ask for Tequila and Salt and call me over!

Is this a mod someone would do with stock injectors and 250,000 miles on the engine? Except for a new downpipe and an air intake this thing is bone stock. Being a 5 Speed the truck is very slow off the line and doesn't come alive until 3rd gear. I'm looking for a little more poop! -