Electric Water Pump Dyno Numbers
08-27-2006, 01:23 AM
#1
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Join Date: Sep 2005
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Electric Water Pump Dyno Numbers
Has anyone installed the electric water pump and seen what it actually gives you on the dyno? I am interested in this as an upcoming mod and wanted to see what some people who have done it have seen...
Thanks,
Skrappy
Thanks,
Skrappy
08-27-2006, 01:32 AM
#2
2nd Gear Member
Join Date: May 2006
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Posts: 313
RE: Electric Water Pump Dyno Numbers
from http://bmrfabrication.com they put one on there project car y9
We drove the car back down to Anti-Venom to see what the results were worth. On the dyno, the car picked up 3.2 RWHP and 3.8 RWTQ. Not quite as much as were hoping for but every little bit helps. This just goes to show that Ford has a pretty efficient cooling system
08-27-2006, 03:10 AM
#4
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Join Date: Jan 2006
Location: Laredo, TEXAS
Posts: 6,054
RE: Electric Water Pump Dyno Numbers
I doubt you would see a large hp gain with an elec. water pump... an for the price... no thanks...
oh, an sooner or later ya'll have to upgrade your alternator cuz the elec. fan is coming an all....
oh, an sooner or later ya'll have to upgrade your alternator cuz the elec. fan is coming an all....
08-27-2006, 04:23 AM
#6
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RE: Electric Water Pump Dyno Numbers
No offense but that electric water pump makes absolutely zero sense on a street driven vehicle.
Now before someone presents the argument that electric fans work, yes, electric fans are more efficient than belt driven fans because you don't need your fan all the time. The electric fan only runs when required so it will save energy.
However that water pump needs to be turning the entire time the engine is running (assuming full operating temperature)
So think about this...
Electric water pump. You are taking mechanical energy and converting it to electrical energy in your alternator and then using it to drive the electric water pump which converts it back to mechanical energy again.
I didn't have to take physics to know that every time energy is converted from one form to another some is lost. Usually a lot of it is lost. With an electric water pump you are needlessly converting the energy twice for no reason. It just doesn't make any sense. You might be taking some load off the engine by removing the mechanical water pump but you are making the alternator work that much harder to keep up with the electrical load created by the electric water pump.
Ive' seen them on drag cars that aren't driven on the street. They work there because they are running straight off the battery which in most cases is not being charged by the alternator. Most drag cars have a very low output alternator that is just barely strong enough to keep the ignition system alive and that's all it's connected to. Anything else like the water pump and / or electric fuel pumps are kept alive only with a fully charged battery for the short run therfore there is no drag on the alternator from those items.
Now before someone presents the argument that electric fans work, yes, electric fans are more efficient than belt driven fans because you don't need your fan all the time. The electric fan only runs when required so it will save energy.
However that water pump needs to be turning the entire time the engine is running (assuming full operating temperature)
So think about this...
Electric water pump. You are taking mechanical energy and converting it to electrical energy in your alternator and then using it to drive the electric water pump which converts it back to mechanical energy again.
I didn't have to take physics to know that every time energy is converted from one form to another some is lost. Usually a lot of it is lost. With an electric water pump you are needlessly converting the energy twice for no reason. It just doesn't make any sense. You might be taking some load off the engine by removing the mechanical water pump but you are making the alternator work that much harder to keep up with the electrical load created by the electric water pump.
Ive' seen them on drag cars that aren't driven on the street. They work there because they are running straight off the battery which in most cases is not being charged by the alternator. Most drag cars have a very low output alternator that is just barely strong enough to keep the ignition system alive and that's all it's connected to. Anything else like the water pump and / or electric fuel pumps are kept alive only with a fully charged battery for the short run therfore there is no drag on the alternator from those items.
08-27-2006, 10:08 PM
#8
1st Gear Member
Thread Starter
Join Date: Sep 2005
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Posts: 118
RE: Electric Water Pump Dyno Numbers
No offense but that electric water pump makes absolutely zero sense on a street driven vehicle.
Now before someone presents the argument that electric fans work, yes, electric fans are more efficient than belt driven fans because you don't need your fan all the time. The electric fan only runs when required so it will save energy.
However that water pump needs to be turning the entire time the engine is running (assuming full operating temperature)
So think about this...
Electric water pump. You are taking mechanical energy and converting it to electrical energy in your alternator and then using it to drive the electric water pump which converts it back to mechanical energy again.
I didn't have to take physics to know that every time energy is converted from one form to another some is lost. Usually a lot of it is lost. With an electric water pump you are needlessly converting the energy twice for no reason. It just doesn't make any sense. You might be taking some load off the engine by removing the mechanical water pump but you are making the alternator work that much harder to keep up with the electrical load created by the electric water pump.
Ive' seen them on drag cars that aren't driven on the street. They work there because they are running straight off the battery which in most cases is not being charged by the alternator. Most drag cars have a very low output alternator that is just barely strong enough to keep the ignition system alive and that's all it's connected to. Anything else like the water pump and / or electric fuel pumps are kept alive only with a fully charged battery for the short run therfore there is no drag on the alternator from those items.
Now before someone presents the argument that electric fans work, yes, electric fans are more efficient than belt driven fans because you don't need your fan all the time. The electric fan only runs when required so it will save energy.
However that water pump needs to be turning the entire time the engine is running (assuming full operating temperature)
So think about this...
Electric water pump. You are taking mechanical energy and converting it to electrical energy in your alternator and then using it to drive the electric water pump which converts it back to mechanical energy again.
I didn't have to take physics to know that every time energy is converted from one form to another some is lost. Usually a lot of it is lost. With an electric water pump you are needlessly converting the energy twice for no reason. It just doesn't make any sense. You might be taking some load off the engine by removing the mechanical water pump but you are making the alternator work that much harder to keep up with the electrical load created by the electric water pump.
Ive' seen them on drag cars that aren't driven on the street. They work there because they are running straight off the battery which in most cases is not being charged by the alternator. Most drag cars have a very low output alternator that is just barely strong enough to keep the ignition system alive and that's all it's connected to. Anything else like the water pump and / or electric fuel pumps are kept alive only with a fully charged battery for the short run therfore there is no drag on the alternator from those items.
Hope this helps explain where the power is...
Skrappy
08-28-2006, 03:49 AM
#9
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Join Date: Mar 2005
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Posts: 864
RE: Electric Water Pump Dyno Numbers
Skrappy - Thanks for that explanation. That does make sense. Certainly water pump would cool the engine just fine running at a constant speed. I didn't think of that but thanks for helping me understand it.