Is there a good airbox mod that is recommended?

 

How are the CP3 pumps gonna hold up to fuel starvation? Any better than the VP44's ???

 

[quote author=TXRAM2 link=board=20;threadid=15882;start=15#155527 date=1057094671]<br>How are the CP3 pumps gonna hold up to fuel starvation? Any better than the VP44's ???<br>[/quote]<br><br>The CP3 still depends on fuel flow for cooling and lubrication. I'd say that anytime you drain the pump, its going to take miles off its life. How many? I haven't the slightest idea. Start a collection, and when there is enough in it to pay for new CP3, I'll run mine dry a bunch more times and let you know

 

I have read somewhere that the Cummins common rail injection pump is used in Europe without the lift pump. The Europeans gets a priming bulb. If true the lift pump is only used for priming the system.<br><br>MikeyB

 

[quote author=MikeyB link=board=20;threadid=15882;start=15#156472 date=1057327019]<br>I have read somewhere that the Cummins common rail injection pump is used in Europe without the lift pump. The Europeans gets a priming bulb. If true the lift pump is only used for priming the system.<br>[/quote]<br><br>The DuraMax is the same, however, they also don't use as tight a fuel filter as the Cummins does. And just simply having the lift pump stuffed in the way restricts flow, so the CP3 can no longer generate enough flow for modified vehicles. Perhaps stockers could run without a lift pump, but I personally wouldn't want to try it.<br><br>Rod

 

When I was hooking up my new lift pump I tried to see if I could get the engine to light off without a lift pump and could not. I was going to use a short chunk of hose setup to bypass if the lift pump went TU. I did not have anyway to prime it though so it may be if you used an outboard bulb or something similar to prime the system you might be able to get it lit off that way. The cp3 will not prime itself, that much I have learned.

 

And speaking of lift pumps mine started leaking again today!!<br> &gt;<br><br>MikeyB

 

[quote author=MikeyB link=board=20;threadid=15882;start=15#156597 date=1057352462]<br> And speaking of lift pumps mine started leaking again today!!<br> &gt;<br><br>MikeyB<br>[/quote]<br><br>from where????

 

It appears to be leaking around the seal between the filter housing and lift pump. When I first had the truck it leak. The mounting bolts was not torqued to spec (61 inch lbs). After retorquing the bolts the leak disappeared. And now it's back, guess I will have to replace the O-ring seal.<br><br>MikeyB

 

In response to a comment that Push-rod made earlier, concerning reasons for pump failure.<br>Allthough I am running a first gen I noticed yesterday that my truck would not idle. I had put 150 miles on in 100 degree weather and had run my fuel tank down to the point I only had 2 gallons left. I rarely run it that low. After fueling up it started idling fine. <br>Since diesels circulate thier unused fuel from the pump back to the tank. Im guessing my fuel temperature was very hot. I know from the trucking industry that you dont want to touch a trucks fuel tank that has come off the road on a hot day. I have seen fuel temps over 130 degrees. It would not be a bad idea to use an automatic trans cooler for a fuel cooler. however you would have to remove it in the winter or atleast have a shut off or bypass for winter.<br>the trucking industry is currently working on fuel coolers for emissions reasons. Just like an aftercooler cools the air it is also important to keep your fuel temp down.<br>Keeping the temp down will help the life of your pumps and keep the engine running as efficienly as possible.<br>Just my 2 cents ;D

 

Rod, or anybody. Has anyone ever installed a temp, temp gauge on the return line of either a second or third gen fuel pump to see just exactly what the temps are after a hard run? Or is all the talk about heat generation in the pumps just theory? Any hard facts out there?

 

The temperature reading I gave earlier was off of a laptop computor. The newer trucks are all electronic engines and can be monitored while running. I have seen fuel temps over 130 degrees.<br> Diesel fuel systems recirculate their fuel to cool the pumps and injectors or nozzles. These are all facts. They were taught to me in school and I have seen these theorys in action for the past 20 years.<br> I believe in the next 5 years we will be seeing fuel coolers and various other things being tested and installed to meet emissions requirements.<br> Just another 2 cents worth ;D