FE-size of over drive & under drive pulley's ?

[FUNFER2]

I know that in the past, some systems were runnibg through the radiator too fast, so the water did not stay in the radiator long enough to cool well. I also ran the iron pump and when I changed to the Edelbrock,......big difference.

Like I mentioned, what size pulleys work the best ?

Dave- How do you figure the 15% and what's your 3 pulley size's ?

[undy]

Originally Posted by FUNFER2

I know that in the past, some systems were runnibg through the radiator too fast, so the water did not stay in the radiator long enough to cool well. I also ran the iron pump and when I changed to the Edelbrock,......big difference.

Like I mentioned, what size pulleys work the best ?

Dave- How do you figure the 15% and what's your 3 pulley size's ?

The 3rd pulley (alternator) is irrelavent as far over-driving the water pump, don't care, didn't even measure it. I'm producing a ton of voltage at idle so the alternator pulley is a non-issue.

It's actually 12.5% overdriven. Crank pulley diameter/water pump pulley diameter.

The "water moving too fast through the radiator too fast" concept has always been and forever will be a crock-o-sh!t, no basis in fact.

[FUNFER2]

Dave- "a crock-o-sh!t, no basis in fact. "

You're naughty !

[DAVID GAGNARD]

Kevin:

a good rule of thumb is to have the water pump pulley 1 to 1.5 inches in diameter SMALLER than the crank pulley, that way your overdriving the water pump....

For a 6 3/4in. crank pulley, to get 15% overdrive, you would need a 5 3/4in, water pump pulley.........

The alternator pullley is the small one and with a 6 3/4 in crank pulley, you will not have to worry about the alternator......

David

[FUNFER2]

Thanks David, I appreciate it.

How about these ?

Water Pump Pulley
P/N BBFE2WP
Pulley Diameter: 6.2"
Pilot Diameter: 0.625"

Crankshaft Pulley:
P/N BBFE2CR
Crank Pulley Diameter: 5.4"
Crank Pulley Bolt Pattern: 3 Bolt

Alternator Pulley:
P/N ALTFAN
Diameter: 2.7"
Alternator Shaft Diameter: 11/16

[DAVID GAGNARD]

Originally Posted by FUNFER2

Thanks David, I appreciate it.

How about these ?

Water Pump Pulley
P/N BBFE2WP
Pulley Diameter: 6.2"
Pilot Diameter: 0.625"

Crankshaft Pulley:
P/N BBFE2CR
Crank Pulley Diameter: 5.4"
Crank Pulley Bolt Pattern: 3 Bolt

Alternator Pulley:
P/N ALTFAN
Diameter: 2.7"
Alternator Shaft Diameter: 11/16

Nope, don't use those, look again, your UNDERDRIVING your water pump by roughly 13% with these, you want to overdrive your water pump..................

You need to reverse those numbers........

David

[FUNFER2]

lol,....... must be too tired, I meant to post the overdrive number's


Been working on the sprint car for two straight days for the races tomorrow.