Anyone Install a Fuel Cooler?

double post.

 

Absolutely incorrect. Not once have I said density is not important. What I'm saying is it is equally offset by volume. Think of the volume in your tanks, not in the injector.

If you're trying to squeeze 10 hp out of a 700 hp motor to beat your buddy in an off the highway tractor pull I'd say yes, get some fancy cooler. On an engine running the injectors at 100% you will gain a small amount of horsepower with cold fuel. Injectors can only injecto so much volume of fuel, so if you increase the density yes you will get a small amount of horsepower due to more BTU's being injected.

However one does not increase efficiency simply by throwing more fuel at an engine. On a regular highway engine, a fuel cooler is a waste of time and money unless you're addressing a specific problem. But if the truck is running fine, there's absolutely no logical reason to add a cooler.

 

If your trying to squeeze 10 HP for pulling you don't waste time and money in a fuel cooler.

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Then it's even more of a waste than I thought. Just trying to help you guys out. Don't bother!

 

Pulling lasts for 10-15 seconds. Pulling trucks run old mechanical motors. Only thing a fuel cooler Is going to do is cost money and be another area to leak.

 

If hotter fuel makes no difference, just route your fuel line across the top of your exhaust manifold and see how long the truck runs much less losing any mpgs or hp?

Common sense trumps BS everytime.

 

Within the normal range of operation (fuel temperatures), as long as you inject the same amount of fuel (MASS, not volume) the power output will not change, and the engine efficiency will not change (noticably).
Hotter fuel has a lower density, less BTU per gallon and less lbs/gallon. If the density changes by 1%, also the BTU/gallon changes by 1%. To inject the same amount of energy (BTU) the system has to inject a larger volume (by 1%) to inject the same mass of fuel, and the same BTU content, resulting in the same power/torque.

That's why the ECU gets information from the fuel temperature sensor, to compensate for the density of the fuel, with the aim to inject the same amount of BTU's and the same mass of fuel. That is also the reason why the fuel temp resistor/wire works, specially with cold fuel.
The ECU thinks the fuel is hot, and compensates by injecting a larger VOLUME of fuel. But the real fuel is cold, and therefor a larger mass of fuel is injected, and more BTU, resulting in higher power (but not neccesarily higher efficiency!)
The smaller the difference between the true fuel temperature and the simulated temperature as seen by the ECU, the smaller the effect of the fuel temperature resistors/wire. If the real fuel temperature gets higher than the simulated temperature you will actually loose power!

A fuel cooler on engine with the normal fuel temperature sensor will NOT result in higher power or efficiency.
A fuel cooler on an engine with fuel temp. resistor/wire will result in higher power, but the difference in engine efficiency, if any, is negligible.

The fuel cooler may (probably will) have a positive effect in controlling algae growth and/or asphalting of the fuel

 

Its not the fuel that is the problem. These new trucks run alot hotter now, I bet the fuel coming off the return line is dang near boiling.

 

A lb of fuel is a lb, a gal is a gal and will change with temp. I love my fuel wire and cooler.