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Engine Test Stand

When rebuilding the matching number 327/350hp for the 68 vette, I want to make sure that everything goes well. That last thing I would want is there to be an oil leak all over the freshly restored body and chassis. For this reason, I decided to build an engine test stand to operate the engine prior to installation, plus, it is a good way to keep an engine from sitting too long without it being run.

Here are a few pictures of the almost completed engine test stand. I will update this article later once I build the mount for the radiator but I wanted to have an engine hook up first to make sure I do not make the radiator mount too high or low.

home made engine test stand

engine test stand design

I first started out laying everything out and deciding on a design.

engine test stand layout

Before welding all the pieces together, I slid a larger square over the 2" by 2" to make it compatible for different sizes of engines. I cut two pieces off a strip of angle iron and drilled a hole so that the arms can move. The nut welded on the side is for locking the engine in place but I do not think I am going to have any problems with it moving.

motor test stand locking arms

I welded four precut metal rectangles that I bought at the scrap yard as a base to mount the casters to. This way I didn't have to weld them to the stand. The casters I used were from Harbor Freight and can hold 350 lb each, good thing because the stand alone is weighing quite a bit.

This might be a little over kill using inch steel but the price was right.

engine run stand wheels 2x2 square tubing

battery and gas tank rack for engine test stand I installed a rack on the back using 1x1in angle iron to hold the battery and gas tank.










In order to find out where to place the rear mounting plate, I test mounted the engine on the stand. Once I determined where to install the plate, I welded four long welds on the sides to give it the most strength possible. With the slits in the mounting plate, I can move the arms to adjust for different size engines.

engine test fit
engine test stand mounting plate

Using diamond plate from the scrap yard, I built a housing to hold the switches and gauges. I cut a small groove in the aluminum to help it bend and then jerry rigged the metal table to act as a break. I used one piece of angle iron and c-clamps to hold down the diamond plate to the table and then used four other pieces of metal, two horizontal and two vertical, to support the part that is getting bent. With simple leverage from the two vertical bars the diamond plate bent very easily.

diamond plate bending

diamond plate break

Once I determined the shape, I measured and drilled holes for the gauges and switches. I used the gauges and switches from our old 1975 boat rather than having to buy new ones. The only thing I bought as far as switches go was the ignition switch that I purchased from Advance for $15.

gauges and switches housing

engine test stand gauges dimentions

To mount the gauge housing, I drilled and tapped holes in the 2" by 2" for the bottom mount. For the top mount, I welded a plate on the top of the 2" by 2" and tapped threads into it.

engine test stand mounting bolts

In order to make the housing more flush looking, I made aluminum triangles to cover up the side. I TIG welded two spot welds on the inside to hold them in position.

engine run stand engine test stand protector plate

Since I will need access to the gauges and the engine mounting bolts, I installed a small door on the bottom with hinges that will allow me access the inside without having to remove everything. This will come in handy when hooking up the gauges and moving the motor mounts.

engine test stand protector plate engine test stand access door

To attach the rear of the engine to the stand, I made four braces. In order for the heads of the bolt not to spin while being tighten, I installed carriage bolts that I grinded down so that they would fit perfectly in the slots without rotating. I also installed multiple washers in between the mounting plate and the braces to leave room for the bolts that will attach to the rear of the motor.

home made engine test stand braces

For now that is it but I will be updating this article later once I determine the dimensions for the radiator support.

home made engine test stand

home made engine run stand

home made engine test stand

Questions:

Where did you get the supports for the engine mount area?