New Prime-loc style for 24 Valves?

[3dracer]

I heard recently about the new conversion for the fuel filter for the 24 valves. Can I get some info on this from you guys? I heard that it is moved between the fender and the master cylinder and also has a glass bowl under neath to look at. For around $125 I can get one. Is that cheap or can I get it somewhere else.





Thanks. . 3dracer

 

[Evan A. Beck]

Avoid the Prime-Loc on any 24-valve engine. The fuel system is weak to begin with, and adding more length to the fuel lines is not good. Do a search on "24-valve Prime-Loc," and you'll see what I am talking about. I am certain the system caused premature injection pump failure on some trucks. The stock filter is easy enough to change.

 

[RJOL]

Got to agree with Evan on this...

The real advantage to the Prime-Loc system is to move the filter on the 12V's, as it is a RPITA to do a filter change.



Not only is the fuel filter easy to work on with the 24V, there is a major disadvantage to making the fuel pump work even harder by lengthening the fuel lines... . Just wouldn't do it IMHO... .

 

[John]

I concur with Evan... in fact, I have documentation that a significant pressure loss was caused by the Prime-Loc system, imposing a hardship on my already weak OE lift pump which could have caused premature failure of my VP44 injection pump if not caught in time. Removal of my Prime-Loc resulted in a minimum 5 psi (across the board) increase in pressure... this was with the specified Fleetguard fuel filter (new). Without going into all the particulars, before I removed the Prime-Loc system I saw a vacuum at the VP44 injection pump at light to light moderate throttle whereas, after the removal of the Prime-Loc system I saw positive flow pressure.



Keep in mind I'm not bashing the Prime-Loc fuel filter relocation system per se, just this system in conjunction with the OE fuel delivery system of the 24v engines.



Also noteworthy, I noticed Geno's Garage dropped the 24v Prime-Loc kit from their catalog.

 

[3dracer]

Schied Deisel here in Effingham told a friend of mine that it would be able to make the lift pump more reliable. I don't really know why. I am going to find out today. That friend of mine is going to Dyno his truck today and I am going to ask all kinds of questions about this thing. I will keep you informed about what they say.

 

[3dracer]

UPDATE!! today they told me that a pusher pump would work better. So who is telling me the truth. Also, my buddy got this truck and no one knows about it, I just knew it would run good. It dyno'd at about 800 torque and 220 horse. With 361,000 miles. Still with no rattles and good mileage.

 

[John]

huh?

Originally posted by 3dracer

It dyno'd at about 800 torque and 220 horse

Something doesn't sound right..... torque is way too high for the amount of horsepower.