CRD CP3 Fuel cooler

warp2diesel · **Posted:** Mon Aug 25, 2008 9:08 pm

I installed my over kill fuel cooler. No more watching the fuel gauge stay up and then drop when you grab a bite to eat.

http://picasaweb.google.com/warp2diesel ... 9736497122

Temp control to come later before winter.

gmctd · **Posted:** Mon Aug 25, 2008 11:04 pm

Hey, yer KJ is same color as mine....................

Turbo Tim · **Posted:** Mon Aug 25, 2008 11:57 pm

I have to ask: So how do you get all the trapped air out?
Since the tubes run up-and-down, it makes a bunch of air traps. If it were to go sideways, the air could work it's way out.
Just wondering......

Uffe · **Posted:** Tue Aug 26, 2008 4:20 am

Overkill, yep. 10000w cooler? (says that on top of the box (well, nearly says that

)).

nursecosmo · **Posted:** Tue Aug 26, 2008 5:11 am

Nice install. Let us know if you get any increase in performance.

warp2diesel · **Posted:** Tue Aug 26, 2008 7:47 am

... 80mph and 90f heat. Checked with laser thermometer after pulling off the expressway to check into hotel 93f at the top of the cooler.

Air bubbles, it is on the return line no problems with bubbles.

Why I went with that over kill cooler.
$25 at Summit store when I was in McDonough Georgia and paid for no shipping, Delta didn't know it but they shipped it along with my B&M trans cooler for free in my luggage.
All I had to do was eat a bag of peanuts I had in my luggage to get the weight down, no problem.
Buy smaller one online $50, sorry UPS and FedEx.
No brainer :lol:

Turbo Tim · **Posted:** Tue Aug 26, 2008 9:59 am

WAIT a minute here. I missed something.
Just "Why" would you put the cooler on the return line back to the tank? Tank don't care what temp fuel is. Fuel gauge don't care what temp fuel is. Even the added lift pump mod don't care what temp the fuel is.
Seems to me the proper place for the cooler is on the supply line just BEFORE the CP3 pump. The CP3 pump does care about the temp of the fuel.
I'm just wondering about your logic. I would have plumbed it differently.

gmctd · **Posted:** Tue Aug 26, 2008 11:39 am

Cool fuel from the tank trumps hot fuel from the tank, any day - not to mention all the foaming associated with hot Diesel fuel - the entire tank would be the 'head' on a tall glass of cool fuel - foaming is aeration, and we should all know what that does to fuel injected Diesel systems

But warp can speak for hisself......................

bugnout · **Posted:** Tue Aug 26, 2008 12:13 pm

Turbo Tim wrote:

WAIT a minute here. I missed something.
Just "Why" would you put the cooler on the return line back to the tank? Tank don't care what temp fuel is. Fuel gauge don't care what temp fuel is. Even the added lift pump mod don't care what temp the fuel is.
Seems to me the proper place for the cooler is on the supply line just BEFORE the CP3 pump. The CP3 pump does care about the temp of the fuel.
I'm just wondering about your logic. I would have plumbed it differently.

If you put it in after the fuel head, before the CP3, wouldn't you be defeating the fuel temp probe and heater.

With a full tank, fuel cooler is probably not going to impact temp much, its most effective when your tank level is low to prevent you from recycling hot fuel back to the CP3.

Turbo Tim · **Posted:** Tue Aug 26, 2008 8:53 pm

I was thinking again that if I (and possibly soon) do this, "I" would put it just before the filter head assembly, this way the temp sensor is reading correctly, and the CP3 gets cool fuel.

gmctd · **Posted:** Tue Aug 26, 2008 10:00 pm

If Inlet Fuel Temp reads hi, CP3 won't be getting much fuel of any temperature: it's called limp mode due to high Inlet Fuel Temperature - P0180, etc - again, a fuel tank full of cool fuel beats a fuel tank full of hot fuel under any circumstances

Sir Sam · **Posted:** Tue Aug 26, 2008 10:43 pm

Turbo Tim wrote:

I was thinking again that if I (and possibly soon) do this, "I" would put it just before the filter head assembly, this way the temp sensor is reading correctly, and the CP3 gets cool fuel.

Problem is heat dissipation is driven by temperature difference, sure you would cool the incoming fuel down some, but the returning fuel to the tank will still be just as hot.

If you try to cool the incoming fuel down you will end up heating the tank up to its terminal temperature quicker. Whereas if you cool the returning fuel the incoming fuel will stay cooler longer.

My vote is on the return line cooler, course, if you really wanted to overbuild the system you would have both.

warp2diesel · **Posted:** Wed Aug 27, 2008 12:17 am

If you look at the pics you will see that I unplugged my heater. I makes no sense to heat fuel up before it goes into the CP3 unless it is cold and you need to keep it from gelling.
When I tested my fuel temp after a 2 1/2 hour drive at speeds between 70mph and 80mph I had a 93.5f fuel temp coming out of the cooler with a 89.5f ambient temp, that is 4f over ambient going back to the tank, not bad.
In theory, cooling the fuel going to the rail from the CP3 would be the most efficient, but the cost of a cooler that can handle 23500PSI would be expensive to say the least. Putting the cooler between the fuel filter and the CP3 would be slightly more efficient, but risky due to the fact that there is always left over debris inside hoses and the cooler its self going into the CP3. Most hydraulic coolers are on the return line as it returns to the tank.
Other advantages of the return line cooler are:
1) Hot fuel is not returned to the tank.
2) Pressure leaks are not an issue.
3) Vacuum leaks are not an issue.
4) Air bubbles are not an issue.

BTW: Summit wanted almost twice the money for the fuel cooler than the small trans cooler they had on sale in the store. Twice the cooling for half the money, no brainer :!:

gmctd · **Posted:** Wed Aug 27, 2008 10:17 am

Purpose of cooling the fuel is the internal clearances of the CP3 injection pump, and to prevent aeration prior to pumping to injection pressures, not to make the fuel denser - the thermal rating spec of a heat exchanger is determined by process density and flowrate thru the heat exchanger + air flowrate over the exposed fin area - each type: engine, trans, fuel, also has internal finned surfaces spec'ed to density of liquid flowrate of engine or transmission or fuel system - in this case, where return fuel is the process, the trans cooler will suffice as return fuel is a trickle, and thus will remain in the cooler tubing long enuff to loose the therms, which is at least at engine coolant temperature coming off the injectors

retmil46 · **Posted:** Wed Aug 27, 2008 5:57 pm

warp2diesel wrote:

I installed my over kill fuel cooler. No more watching the fuel gauge stay up and then drop when you grab a bite to eat.

http://picasaweb.google.com/warp2diesel ... 9736497122

Temp control to come later before winter.

A couple sheets of cardboard or plastic of suitable size that can be tystrapped over the cooler will suffice for temp control - all you need to do is block airflow to the cooler. Both I and Ranger1 discovered this last winter. Once the high daytime temps start dropping routinely below 70 F, it's just about time to block off the cooler for the winter.

warp2diesel · **Posted:** Wed Aug 27, 2008 6:33 pm

retmil46 wrote:

warp2diesel wrote:

I installed my over kill fuel cooler. No more watching the fuel gauge stay up and then drop when you grab a bite to eat.

http://picasaweb.google.com/warp2diesel ... 9736497122

Temp control to come later before winter.

A couple sheets of cardboard or plastic of suitable size that can be tystrapped over the cooler will suffice for temp control - all you need to do is block airflow to the cooler. Both I and Ranger1 discovered this last winter. Once the high daytime temps start dropping routinely below 70 F, it's just about time to block off the cooler for the winter.

retmil46: Aurora Illinois gets down to -20f, ;last year and the year before only -15f. I may just cop out and put in a three way manual valve and give it a flip in the winter. In spite of all the GLOBAL WARMING HYPE, this coming winter is expected to get to -20 in Northern Illinois. I will bet the Pine Bark Beetle will be killed off in the western states to the relief of the timber industry.

onthehunt · **Posted:** Wed Aug 27, 2008 8:22 pm

I believe it is now called "climate change". "Global warming" has been a tough sale lately.

warp2diesel · **Posted:** Wed Aug 27, 2008 8:25 pm

onthehunt wrote:

I believe it is now called "climate change". "Global warming" has been a tough sale lately.

Since the weather changes from day to day, they are covered.

CRD CP3 Fuel cooler

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