cassimus

would a proform 35 gpm electric water pump be sufficient in a mild 302? for a street car

67mustang302

Just run a mechanical, they're way cheaper.

smacked1

cheaper and don't you need to do some modifications for a shorter belt or no?

jkrum10238

i think the point is to gain power not to save money.................

67mustang302

You're not gonna gain any useful power by going to an electric pump. The electricity has to come form the alternator, so the alt load increases and it becomes harder to turn, consuming power. Granted, it's more efficient to mechanically run an alternator/generator to run a mechanical device than to use the mechanical power to run the mechanical device directly, but you'd have to have a monster engine to pick up anything measurable with an electric pump, so you can't justify the cost on 99% of street engines.

The big advantage of an electric water pump, is when used with an electric fan you can run the fan and pump when the engine is off for quicker cool down between rounds, or in a road race type setup where you're turning constant high rpm the electric will maintain a slower and consistent flow rate, and without the risk of possibly generating cavitation.

Tony71502

I seriously don't think the alternator will be harder to turn when demanding more amperage. It just will not produce it and performance issues will result, just like when people run other electronics on a stock charging system.

Also, the amount of power required to turn the turbine in the water pump depends directly on the pumps efficieny, the density of the water(which has minimal change with temp), and the flow rate. Unless going to a different block and along with it a different water pump(different coolant passage area and a different efficiency pump, both of which affect flow rate at a given rpm), the parasitic loss will be the same as any other 5.0L.

But for a stockish motor, put the money somewhere else.

1ATony

I's say stick with a mechanial one too.Also one less thing to deal with going wrong on yah.

67mustang302

An alternator will be harder to turn with more electrical load. Alternators use electromagnets, not permanent magnets. They actually USE a small amount of current to generate a magnetic field, and field strength and alternator rpm determine the amerpage output. When electrical load increase, the voltage regulator increase current flow through the electromagnets, inducing a stronger magnetic field to increase current output. So when you increase electrical load, the alternator generates a stronger magnetic field that takes more power to turn.

mjr46

I run an elec water pump, msd ign, elec fuel pump,elec fan and I have a small amp and base tube as well as some other small elec devices in the car and a powermaster 100 amp alt, it hardly knows the devices are using it's current, the elec water pump don't draw much amperage and it's a constant small amount, I believe my fuse is a 15 amp for it.

SonicBlueFiveSlow

Mjr, your water pump is a meziere, correct?