Well while my truck is tore down ive decided to ditch the over flow valve and try something a little different. I bought an adjustable fuel pressure regulator to replace the over flow valve. Hopefully it works out all right. Any one else ever tried this?

 

sounds like a good idea to me, make sure you list your parts used, pictures and how it works!

 

I answered your question in the 12 valve forum.
Depending on the valve it may not work. You need a pressure sustaining (relief) valve, not a pressure regulating type.
If you install a regulating type in the return line, same place the overflow valve basically is, the regulator will open up try to reach the set pressure of the regulator in the return line at the expends of dropping pressure in the injection pump.

 

works well

with an auxillary fuel pump, IE an aeromotive 1000 with bigger lines, and about 50 psi of fuel pressure at idle... Sounds like thats in my future as well...

Rick

 

So u dont think this will work well with just the stock lift pump? Im really starting to wonder about fuel systems, seems like its hard for the stock mechanical LP to keep up with anything much above 500hp, and thats pushing it. I would buy a FASS but i cant bring myself to pay that much money for an electric fuel pump and a couple of filters.

 

Well we got the truck together, and the regulator is working great! All it is is a $30 shipped ricer blue anodized fuel regulator for a civic or somethin with a gauge built in, and it is easily adjustable. We have it set at 20psi, but you can put it wherever you want no problem. He is runnin the stock lift pump. I see one on my truck in the future. well worth the $30 it cost off ebay.

Eric

 

Go to 35psi

Chris

 

Oops, dont know why I put 20psi. Must have something to do with working 3rd shift, and not sleeping yet We have it set at 40psi right now. seems to be working well.

Eric

 

That'll do it...should be 32-35 at WOT, so 40psi at idle should work. I'm sure it'll pull down at WOT though!

Chris

 

Is this the overflow from the VP44? Pardon my ignorance, I'm relatively new to the diesel scene and still soaking up all this stuff. If so, will this limit volume flow through the pump, possibly causing more heat and less lubrication?

 

The regulator goes on the return side of the pump, so it keeps more fuel pressure to the pump, and is much steadier than the overflow valve which simply consits of a ball and spring to keep pressure. Plus it is easily adjustable. There is really no way for it to hurt the pump unless you set it for way too much pressure. And 12 valves dont have a VP44 We have a fully mechanical P-7100 injection pump that is much more reliable, and can flow a lot more fuel than the VP

Eric

 

Will the regulator work with the VP44?

 

I don't see why not but you do not want much more than 15-20psi on a VP anyways. They cannot handle high pressures and high pressures at crank can cause hard starting.

 

post up some pics of the install

 

We will try to get some pics of it by the end of the week

Eric