2.5L performance

[redgooch]

I run a 200 amp alt. and a duel battery setup. The electric fan i run only uses 18 amps and moves 2100 cfm. So the fan is just a fart in the wind (no pun intended) which has no effect on the electric system. In my case the electric fan is much better than the stock fan. The electric water pump makes a difference too. I have said it before and I'll say it again, reduce parasitic drag and rotational mass it frees up power to go where it is needed, the tires.

 

[locovaca]

I run a 200 amp alt. and a duel battery setup. The electric fan i run only uses 18 amps and moves 2100 cfm. So the fan is just a fart in the wind (no pun intended) which has no effect on the electric system. In my case the electric fan is much better than the stock fan. The electric water pump makes a difference too. I have said it before and I'll say it again, reduce parasitic drag and rotational mass it frees up power to go where it is needed, the tires.

Larger alternators are not any more efficient. Just as a 5.0 V8 does not necessarily use less gas to move a truck than a 2.3 at 35 mph.

You are not removing "parasitic drag" or any "rotational mass." You are moving and multiplying that drag from individual accessories to the alternator.

A good alternator is 60% efficient. A good DC electric motor is 80% efficient. A properly working thermal clutch is nearly 100% efficient (there is no conversion of energy types). Therefore, for every HP you spend on spinning a Mechanical Fan you only see a net .48 HP at the electric fan. So to run an Electric Fan of the same rating, it takes an extra 52% in horsepower from the engine to do so.

So thus you run a smaller fan than the mechanical is. You could certainly try to fab up something to run a smaller mechanical fan and get the same, if not better, results.

Nothing is "free" in mechanics. Any useful energy conversion requires an energy loss, almost always in the form of heat.

 

[OmegaSuperman]

Do you guys not read? The thermal clutches never fully disengage and are always rotating mass.. where you can have electric fan completely off so its drawing no power... SO NO they are not both intermittent

Go put your trucks on a dyno and try it.. Stop being stubborn truck guys... No wonder I left.

 

[4b316]

super is right.an electric fan might take the same power to turn as a clutch fan when it is on but with a temperture switch on it,it should only be running at idle once in a while or in traffic.Electric fans take no power when try are off.a clutch fan is always spinning even when the truck is cold.

 

[99 powr rangr]

Haha... I agree, you might pick up 'some' hp... Not 15-30... Intake and exhaust won't do anything useful (your stock intake is already cold air)... Electric fan won't do anything... U-drive pullies might free up 1-2 hp, if you're lucky, a lightweight d-shaft won't free up anything...

Wrong bubby replacing the engine driven fan frees up 5-15 hp on its own and that is across the board with any vehicle underdrive pullies change the ratio of the pullies taking less power from the engine to spin the accesories intake is not really to get colder air but aftermarket intakes flow more with less restrictions amd exhaust is the same more flow less restrictions lighter wieght driveshaft reduces rotational loads and forces also shortening the driveshaft if u can wil help improve power as well

 

[fastpakr]

You brought this back from 2.5 years ago just so we'd know you drank the kool-aid (and not one glass, but the whole pitcher)?


Edit... Shorten the driveshaft for performance. Really? You actually wrote that?

 

[Rose2300]

Edit... Shorten the driveshaft for performance. Really? You actually wrote that?

What he said.
my god haha

 

[TheTopher]

You brought this back from 2.5 years ago just so we'd know you drank the kool-aid (and not one glass, but the whole pitcher)?


Edit... Shorten the driveshaft for performance. Really? You actually wrote that?

Let's see if I can't find room in my sig for this...

 

[12step]

Wow so u guys are saying that my electric fan is useless you mean it dosent help my truck reach operating temp faster, It dosent help my water pump last longer, dosent make my a/c cool down more efficiently , and by god in the winter when it rarely even comes on it takes more power to turn than my clutch fan, crapity crap crap I must take it off right now did I mention my fan pulls like 10 amps and not 30

 

[adsm08]

replacing the engine driven fan frees up 5-15 hp on its own and that is across the board with any vehicle

Please explain how removing a 3 to 4 HP drag frees up 5 to 15.