alternative radiator

[Trevor Jessie]

Before I reinvent the wheel, I thought I would ask here first.
I want more clearance in front of my crank pulley to make for easier placement of an EDIS trigger wheel and sensor. Additionally, I want to use an electric fan. So... how easy would it be to position a radiator farther forward, and what radiator could I use to get better cooling. Yes, the stock raditor is working fine, but I eventually intend on increasing the boost on the supercharger, and I'd like to already have the extra cooling capacity in place. Any and all suggestions are welcome.

 

[tony barnhill]

Which year Midget do you have?

 

[Trevor Jessie]

Sorry, it is a 1970 Midget.

 

[ChrisS]

Trevor,

I just picked up a 1275 car that has the cowl removed from the front of the radiator and a 1500 radiator moved forward to the cowl location with new mounts. To do this the stock vertical supports that hold the cowl and radiator had to be cut down, the right hand radiator hose was relocated to the top of the 1500 radiator and connected to a older style thermostat housing that points to the right. The left hand hose on the radiator (lower) is connected to the water pump. This gives lots of room between the engine and radiator, but it is a very permanent change. I don’t know if it would be a good fit for a street car, but it can be done. It may be easier to install an electric pusher fan in front of the stock radiator and remove the stock belt drive fan.

Chris

 

[Trevor Jessie]

Thanks. I do not mind hacking on the car. It is bodged together from several wrecks. I want a puller fan, because I think they are more efficient (someone correct me if I'm wrong). Fabricating new supports and such is no problem, I'm just looking for something with appropriate dimensions and easy hose routing.

 

[ChrisS]

I think the rule of thumb is that a pusher is 80% as efficient as a puller, but you really need to compare it to stock, and since there is no shroud around the stock fan I would say that a properly sized pusher may work. The trouble may be getting it to fit in the cowl. If you want pictures of the radiator let me know. The engine is out of the car now, but I think you would be able to see what was done.

Chris

 

[jollyroger]

While it won't help on the trigger location. I run a late 1500 unit. It fits in the same location and the end tanks interchange with the early crossflow units. I run it on my racer and have zero heating problems. In fact I have a hard time getting it up to temp in cooler weather. I do run the stock plastic yellow fan too. The most important thing to remember when cooling and engine is moving air through the radiator. Nothing works better than an engine driven fan when done right.

 

[spritenut]

I am running a Geo Metro rad but it has to be from an automatic tranny Metro, the stick has a taller radiator.
Electric puller fan but still lots of room.
Tough from the picture but it works and better than stock with the small mouth on my Speedwell nose.
https://www.exit109.com/~spritenut/georad2.JPG

 

[Trevor Jessie]

Not bad, Frank. I'd like something a little wider, but that is definitely an option. How many cores does it have?

 

[tony barnhill]

I think Hap Waldrup runs an early VW aluminum radiator - the one for non-AC cars

 

[jollyroger]

At one time many moons ago. I built a 76 midget with a 151 ci. pontiac 4 cyl. with a saginaw 4 speed. It had a one piece glass nose and a radiator from a 77 pontiac sunbird. the radiator uprights were removed and the radiator was tilted back. One electric fan did the job. The car also had a vega rear axle. so you can use other radiators. But just how much work do you want to do?

 

[Trevor Jessie]

Sounds like an interesting car.

I do not want to remove the nose cone from the car, so I need something short enough to go under the hood. If I don't find a good solution by midsummer I may see if I can call in a favor and get a decent price on a custom radiator.

 

[Bugeye58]

Trevor, look into one for either a VW Jetta, or a Golf. Aluminum and plastic, weigh nothing, and have plenty of cooling capacity. Many of us that race run them, and they are simple to adapt to the Spridget. Cheap, too.
Jeff