V8 Project Update, Ready for the 2025 Season Options

[FL000]

Hi World, I am moving on to the next phase of my project, and have enough things planned that I will call it phase 2. Hopefully this thread will motivate me to see it through quicker, and maybe help someone else at the same time.

Phase 1 was my 7 year adventure taking a banged up 73 roller and installing a SBC, renegade kit, and Sheridan body kit. Here is basically what it looks like now



Had fun driving it for a summer and a winter, then realized I am ready to start the next round of upgrades. The list in no particular order and consists of:
Heat and a/c
Audi 01E install
Fuel injection
Boxster brakes
Fix passenger door gap

Time and money varies, so no timeline for when it will get done, but my wife's 62 Lincoln is next in line so I do have some encouragement to finish!

[FL000]

I know there are a number of electric water pumps on the market, but the Davies Craig caught my eye and is the one I went with. Pretty slick little unit that uses pulse wave modulation (PWM) to hit the target temp, which should help on the efficiency side. It also has as a control module that allows you to set your target temp, and control the radiator fans. Set it and forget it in theory. Here it is installed




Yes that is a drop of water below it, yes it drives me nuts, and yes it will be fixed (IMG:style_emoticons/default/smile.gif)

The pump looks lower then it really is compared to the engine bar, but I am going to secure it with a mount higher to be safe.

I was pretty proud of these adapters I made, even though they don't look all that impressive! The tube was too thick to put a DIY bead in, so I welded a bead around it. Seems to be sealing good so far.



As I mentioned the waterpump uses PWM, which basically means cycling between off and on. For DC motors that is a better approach then say trying to control the RPM with varying voltage.

Because of this I was concerned my heater core would not see a consistent flow of hot water through it, and consequently may lead to inconsistent heat flowing out of the blower. Probably wouldn't have mattered, but I am a bit anal by nature so I decided to account for it.

I installed the booster pump shown in the previous post, and added an Arduino UNO to control it. I tapped into the potentiometer wire from the heater valve, and the more you turn the heat knob up the more the booster pump flows. This also seems to be working well.

[djway]

I know there are a number of electric water pumps on the market, but the Davies Craig caught my eye and is the one I went with. Pretty slick little unit that uses pulse wave modulation (PWM) to hit the target temp, which should help on the efficiency side. It also has as a control module that allows you to set your target temp, and control the radiator fans. Set it and forget it in theory. Here it is installed




Yes that is a drop of water below it, yes it drives me nuts, and yes it will be fixed (IMG:style_emoticons/default/smile.gif)

The pump looks lower then it really is compared to the engine bar, but I am going to secure it with a mount higher to be safe.

I was pretty proud of these adapters I made, even though they don't look all that impressive! The tube was too thick to put a DIY bead in, so I welded a bead around it. Seems to be sealing good so far.



As I mentioned the waterpump uses PWM, which basically means cycling between off and on. For DC motors that is a better approach then say trying to control the RPM with varying voltage.

Because of this I was concerned my heater core would not see a consistent flow of hot water through it, and consequently may lead to inconsistent heat flowing out of the blower. Probably wouldn't have mattered, but I am a bit anal by nature so I decided to account for it.

I installed the booster pump shown in the previous post, and added an Arduino UNO to control it. I tapped into the potentiometer wire from the heater valve, and the more you turn the heat knob up the more the booster pump flows. This also seems to be working well.

Can you provide more detail on the booster pump for the electrically impaired (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/biggrin.gif)

[FL000]

[quote name='djway' date='Oct 22 2019, 08:38 PM' post='2756568']
[/quote]
Can you provide more detail on the booster pump for the electrically impaired (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/biggrin.gif)
[/quote]

Something tells me I butchered the quote...

Sure, I'll try. In a car with a mechanical water pump there is constant pressure in the coolant system, including the heater lines. When you adjust your heat setting in tbe cabin it is typically opening a valve on the heater hose to allow coolant to flow through your heater core.

With my water pump using pulse wave modulation, it may be on for 10 seconds, off for 20, on for 10, off for 20 and so on. So if I turn my heater to full hot, which opens the valve completely, it would not gauruntee that water was constantly flowing through my heater core.

So the little booster pump I have is a simple 12 volt pump that flows about 4-5 gallons per minute at max capacity. It works independent of the water pump, and is controlled by the heat setting on the blower unit in the cabin. Turns out I also use PWM to control the booster pump, but don't worry about that for now! Just know that when I select max heat the booster pump flows to it's max capacity, and as you lower the heat it slows down.

Hope that helps (IMG:style_emoticons/default/beerchug.gif)