garyo
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| posted on 22/1/06 at 11:52 AM |
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how to weigh an engine...
I'm about to replace an old MFI CVH with a Zetec, and want to measure the weight change. Is there a cheap attachment for my engine winch - the
sort of scale that people use to measure fish, but that'll go up to 200kgs?
The other thing I thought was that if I know the spring rates on the car, then I should be able to figure it out based on the ride height
difference...
Gary
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ReMan
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| posted on 22/1/06 at 12:06 PM |
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No good if you've started already but otherwise could you run the car onto a weighbridge before and after?
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Jed
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| posted on 22/1/06 at 01:39 PM |
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I use a cheap set of bathroom scales that goes upto 150kg. About 4 quid from Argos. That's for weighing the engine only without the gearbox.
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JonBowden
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| posted on 22/1/06 at 03:34 PM |
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You could try making up a simple lever with the engine hanging on one side and a known weight (eg you) hanging on the other side of the pivot - The
weight should be easy to calculate
Jon
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liam.mccaffrey
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| posted on 22/1/06 at 03:43 PM |
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a newton balance would be about the easiest way to do it and it could really really accurate if you're careful
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garyo
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| posted on 22/1/06 at 05:02 PM |
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120kg bathroom scales £3.29 from argos - amazing! I think I'll get two and then it should be easier to balance the whole engine/gearbox
assembly.
Cheers
Gary
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jolson
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| posted on 22/1/06 at 05:15 PM |
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I was thinking about building something like this
[img]/upload/ruggless - small.jpg[/img]
There is also another model by the same manufacturer here
I found these in Carroll Smith's Engineer to Win. Looks simple enough to build out Locost scraps, and should weigh an engine as easily as a
corner of a car.
[Edited on 2006-1-22 by jolson]
Bum... can't get the image to include in the post. Look in my photo archive under Ruggless - small, and Ruggless - zoomed.
[Edited on 2006-1-22 by jolson]
Hah! Got it!
[Edited on 2006-1-22 by jolson]
Bum... no I don't.. where'd it go? it was there a minute ago.
[Edited on 2006-1-22 by jolson]
Cheers
John
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liam.mccaffrey
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| posted on 22/1/06 at 05:26 PM |
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i know that those cheap scales are notoriously innacurate when you get up to the 120Kg range, just my 2p worth
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stevebubs
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| posted on 22/1/06 at 05:56 PM |
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set of bathroom scales under each wheel....
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JonBowden
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| posted on 22/1/06 at 06:47 PM |
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Something like this must be easy to knock up.
You can calculate the engine weight using the reference weight and the lengths 1 and 2.
You can either alter the reference weight or move the pivot until balance is required
 
Rescued attachment balance.gif
Jon
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owelly
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| posted on 22/1/06 at 08:50 PM |
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Fill a bath with water. Float the engine and box in the bath (on some sort of raft) and measure the quantity of water it displaces over the side onto
the bathroom floor. Each litre equals one kg IIRC.
I'll get me coat.................
http://www.ppcmag.co.uk
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