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Rob B · 12-11-2014, 08:49 AM

Default back to post #22...

Old Goat Racer · 12-11-2014, 11:02 AM

I've run this setup for the last 10 years on 1 of my race cars. 1 motor does it all. "Race only"
Mid 11's.

60man · 12-11-2014, 09:00 PM

Quote:

Originally Posted by Old Goat Racer

I've run this setup for the last 10 years on 1 of my race cars. 1 motor does it all. "Race only"
Mid 11's.

Ditto...that's what I ran. Used the "trick" over drive pulleys too..

Half-Inch Stud · 12-11-2014, 10:02 PM

Hey, let's not overlook the TIMER for auto shutoff.

That'sa why I ditched my electric motor belt-driven water pump & went back to a vee belt.

Bnick166 · 12-11-2014, 10:54 PM

Compute your pulley ratio before you change anything. I chased overheating problems on my '66 for many years....Timing, carb tuning, 3 core, big 4 core ...switched to an aluminum rad, no thermostat, 160 degree, 180 degree, 190 degree, moroso restrictor plates (all 3), new hoses...spring in the lower rad hose, 4 blade, 6 blade fan, 7 blade fan, new fan clutch, shroud no fan clutch, electric fans (2). Turns out my water pump pulley was larger than my crank pulley....effectively underdriving my fan and water pump. I went to the junkyard and asked if they'd point me towards the Pontiac section. After perusing a bunch of engines I found a smaller water pump pulley on a Pontiac engine. After switching the pilley and installing 2 different belts, my overheating problem was solved. The engine now resides in TEXAS in a first gen Firebird. No Problemo!
Divide the crank pulley diameter by the diameter of the waterpump pulley (8" diameter crank pulley and a 6" pulley waterpump pulley gives you a 133% overdriven water pump and fan. I had CVF Racing make an overdrive crank pulley kit. Works great! Check it out, do the math and let us know what you come up with. Hope this helps.

Probird · 12-11-2014, 11:45 PM

Quote:

Originally Posted by 60man

Try a Moroso electric fan drive motor. Glorified heater blower motor with mounting brackets. Belt drives the water pump with pulleys. There are still lots of guys using this system. Then you still bolt a "lightweight" fan to hub. I did that for years on my 11 second motor. I could keep motor cool in lanes and pit cool down without running motor. Not sure I have pics. Wouldn't use for street.

Years ago I ran the Moroso setup too. The motor that comes with it is one speed. While at a swap meet one year I came across a guy that had a whole box of rear defrost motors. I bought a couple of them for $5 a piece. They looked just like the Moroso motor except they had 2 speeds. Low speed was the same as the Moroso motor. Using the high speed wire really picked up the water flow and cooled a lot better. That was the best $5 I spent that year.

Old Goat Racer · 12-12-2014, 11:37 AM

Even though your radiator is only 4 years old, it is clean inside, yes? No clogged up tubes?? Just askin..........

Bud Lyons · 12-12-2014, 09:00 PM

^^^^The only thing that could have clogged it would be cobwebs!

Bill Eveland · 12-12-2014, 09:52 PM

Come on now it's an 80% drag car that's impossible

grandville455 · 12-13-2014, 01:18 AM

Quote:

Originally Posted by Bud Lyons

^^^^The only thing that could have clogged it would be cobwebs!

LMAO

Bud Lyons · 12-13-2014, 07:55 AM

Quote:

Originally Posted by Bill Eveland

Come on now it's an 80% drag car that's impossible

With a 3/4 race cam

BruceWilkie · 12-13-2014, 10:11 AM

Quote:

Originally Posted by Probird

Years ago I ran the Moroso setup too. The motor that comes with it is one speed. While at a swap meet one year I came across a guy that had a whole box of rear defrost motors. I bought a couple of them for $5 a piece. They looked just like the Moroso motor except they had 2 speeds. Low speed was the same as the Moroso motor. Using the high speed wire really picked up the water flow and cooled a lot better. That was the best $5 I spent that year.

I did similar in 90's only 3 speed fan motor... later found an aluminum toothed pulley in used machine scrap pile at work that was about same diameter as the Moroso pump pulley(way bigger than optional "overdrive" pulley that really isn't overdrive ratio). Scrounged up a different belt. Added a cheapy flex fan to pump as well. Low speed was good to get motor warmed if needed on cool days/nights... medium adequate for most all else... Hi got switched on when on return road and brought temps down quick. Hi sucked a bunch more amps though but that may have been the added flex fan load as it notably moved more air.

I still have the pulleys, a few belt sizes and the original Moroso motor n bracket. Moroso motor got real hot, real quick trying to run the big pulley and fan. I may revisit this with different motors/fan/better charging to test. My stock altenator didn't keep up trying to street drive with it in traffic is why I abandoned it.

jm455ho · 12-13-2014, 10:38 AM

Quote:

Originally Posted by 60man

Ditto...that's what I ran. Used the "trick" over drive pulleys too..

Where did you get the "overdrive" pulley?

Gary H · 12-13-2014, 02:38 PM

Quote:

Originally Posted by Bnick166

Compute your pulley ratio before you change anything. I chased overheating problems on my '66 for many years....Timing, carb tuning, 3 core, big 4 core ...switched to an aluminum rad, no thermostat, 160 degree, 180 degree, 190 degree, moroso restrictor plates (all 3), new hoses...spring in the lower rad hose, 4 blade, 6 blade fan, 7 blade fan, new fan clutch, shroud no fan clutch, electric fans (2). Turns out my water pump pulley was larger than my crank pulley....effectively underdriving my fan and water pump. I went to the junkyard and asked if they'd point me towards the Pontiac section. After perusing a bunch of engines I found a smaller water pump pulley on a Pontiac engine. After switching the pilley and installing 2 different belts, my overheating problem was solved. The engine now resides in TEXAS in a first gen Firebird. No Problemo!
Divide the crank pulley diameter by the diameter of the waterpump pulley (8" diameter crank pulley and a 6" pulley waterpump pulley gives you a 133% overdriven water pump and fan. I had CVF Racing make an overdrive crank pulley kit. Works great! Check it out, do the math and let us know what you come up with. Hope this helps.

^^^^^^^^ My thoughts also