I have pulled the 1.7 motor from my 1970 914 parts car and am wanting to install it in my 72 as I rebuild its motor. my question is could I start this motor out of the car and setting on a stand. I have no purpose built stand for motors and I figure a batt. hook the fuel pump up and wire the dist. and crank it. what ya think? I have no idea of the condition of this motor and want to check it out before I install it in my car. It has 40 weber carbs.
Yes, certainly it has been done many time to bench test a motor.
Make sure the stand/cradle has enough strength and out rigging to handle the axial torque of a motor accelerating (no load, just rotational mass) and be careful with the gas.
I'll see if there are any obvious youtube links as to this sort of thing, which I know there are.
Hmm, I would probably just do a leak down test.
Them ain't cracks. Them's casting marks. Seriously, post some pics of the "cracks".
maybe this can give you an idea..........years ago when I purchased engine cores, some were complete enough to test. I did this by using an OLD TIRE as the soft mount cradle...had a section of 3/4 inch plywood cut to avoid the engine sump. and large enough to generiously span the OLD TIRE....with the trans still attached (or you could cut away a trans case leaving the starter mounting and case mounting alone.)...two or three OLD TIRES could work......use a long fuel line and an electric pump, with requlator. get the fuel system in front of the engine and far away. with a battery and a little creative wiring (heavy guage for the starter)....and some toggle switches, etc......you'll have a test stand. and it'll be close to the floor where you and it are safest.
http://www.914world.com/bbs2/index.php?showtopic=96249
http://www.914world.com/bbs2/index.php?showtopic=81485
This was a test stand I made.
It was made from 1/2" plywood, and a few 2x4, and some scrap 4x4 from another project. I also put rollers on it so I could move it around my shop.
You will note that the center is hollow. This was so I could roll the stand under my car, put my floor jack under it, and directly lift my engine into place.
Dash wiring was simple. I just put on a cheap tach from FLAPS. the circuit to the ignition and fuel pump was seperate from the starter. This was so I could turn the motor over to get oil circulated before starting it. The bar on the dashboard was there as I was going to add throttle control. But I got lazy, and just wanted to run the motor, so I didn't.
Worked like a charm.
In this video you can see more of how the stand supported the engine. Very simple, very effective.
http://www.flickr.com/photos/vacca_rabite/2521832117/in/set-1537526/
Zach
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