We all want to change the world. But when you talk about destruction, don’t you know that you can count me out. Don’t you know it’s gonna be alright?

Keeping It Cool

Please keep in mind these are just ideas  I will not be giving exact measurements. You need a good skill set to build one these its 80% fabrication.

So for a good performer the RPM will need to be up around 5500-7000 RPM.

At this RPM the stock water pump setup is going to be forcing the flow too fast and won’t be effective. The other problem being it might cavitate or get air bubbles.

For this reason running a 12v pump or as some do run a 12v electric motor to run stock pump slower is better. I will cover 12v pump setup.

Some of the added benefits of running a 12v pump or you can leave it off during warm up for faster heating or leave it on after engine shut down for further cooling.

I like to wire the electric fan and pump on the same switch since there is no reason to run them individually. As a added note don’t worry about a belt to run alternator because you don’t want one it will just add unwanted drag.

• Some have left stock water pump in place and run 12v inline pump and report having no issues

12v Pump Setup

I prefer  to remove the water pump and make a plate with barb fitting that will connect to the 12v pump. You can use your gasket as a template for size and bolt pattern. I used 1/8 plate with barb fitting with two nuts and gasket. You can use aluminum and weld a fitting what ever works. Mine is a 1 inch fitting but could be 3/4 or whatever you need. One other thing keep in mind will you need an elbow fitting? what direction?

A added note I leave stock thermostat in place but remove the center this gives a bit of restriction. I also run a coolant additive  that reduces friction, improves cooling, increases boiling point. Plenty of them out there check online.

12v Pump

What you want to find is a 12v circulation pump that is good for 250 f temps and can run anti-freeze. This example is from ebay and runs under 100 bucks. I am using a heater circulation pump from a SUV that is 8 gpm.

Just make sure the fitting size is correct you don’t want a mess of adapters keep it clean. These pumps are lightweight and if setup correct won’t need any brackets and are just held in place by hoses. A person could get fancy and add a sensor on thermostat housing with relay to heat activate the fan and pump.


There are a few inexpensive models being used. The most popular being the mini Austin that can be found on ebay for around 85 bucks. Measurements are  14.75H x 10.8W x 1.96D.

Another option is a Raptor 700  rad for around 55 bucks from ebay measuring 16H x 8.25W x 1.82D. I built a aluminum shroud to direct air and works as the rad bracket at same time with two upper struts to the engine for support.


Keep your hoses neat try to buy some that match your needs without adapters or plastic elbows. I really like Dayco for this if you go to there web site that have pics off all there hoses with sizes even some reducer hoses with elbows. I purchased my Dayco hoses from Amazon was like 20 bucks. Also many other places to find the silicone hoses


12 volt fan can be had for 30 bucks on ebay. A neat feature is they will run either direction so depending on your design you can put fan on either side of rad.

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