Now that I have the pulse and can monitor it--at what temperature should I set my fuel temp alarm? I'd rather find the nearest station and top it off during a long trip than risk pump damage.

 

I thought someone once said or Hohn once quoted 160* as the max per some cummins published spec.

All that I know is that measuring the temp at the VP44 inlet gives me high temps. Before memorial day it hit 108* here in Vegas and my fuel temp got up to 170* measured at the VP inlet where the Pulse/Adrenaline sensor is located.

 

My truck sees short trips most of the time, but during an hour trip the other day it got to about 150*. At work we have 3/8" stainless heatsink line for seal pots on the pumps. Maybe I can stick a piece of that inline and see if it helps.

 

I have over 120,000 miles on fuel temps averaging 190 degrees and no problems at all. I think there is a misnomer that fuel temps cause damage to the VP-44. The FedEx chip problem was the theory of over heating the electronics from the constant starting and stopping of their trucks. The IP is mounted next to an angine that is generating more heat than 200 degrees. My theory is as long as you have good consistant fuel and pressure to the IP it stays lubricated which is vital.

I say this only because they said I was crazy to veg my ride. 390,000 on the original VP-44 and 120,000 of it is on veggie oil. The VO entering the IP is at my avg water temp of 190 degrees.

Just my 2 cents
Q

 

An engine project I'm working on confirms the 160*value-- keep it below that, and cooler is better assuming no gelling.

 

Hohn, how you liking your new job? I just started my new career here in Las Vegas a couple weeks ago, its fun, challenging, and new all at the same time, way better getting paid to learn than paying to learn like I did the last five years.

 

It's great. I'm a developmental engineer on the new heavy duty on-highway Cummins engines. I particularly work on the fuel system plumbing.

I now know why banjo fittings were used

 

Can you share why,


I assume you are a ME.

 

Ease of maintenance and compactness of packaging. They also make development easier when you are R&Ring the fittings tons of times.

jh