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> Engine mount bar, why so heavy?
Woody
post Apr 14 2011, 10:07 AM
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My car is a 75 with a 2.0 four. Is there a light weight option for the engine mount bar? I'm trying to put my car on a diet and damn that thing is heavy.
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Cap'n Krusty
post Apr 14 2011, 10:25 AM
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I suppose you could spend thousands designing and fabricating a bar made of some exotic and very lightweight material, but weight that low is actually of less importance than weight elsewhere in the car.

The Cap'n
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McMark
post Apr 14 2011, 10:52 AM
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QUOTE
why so heavy?

Mostly to keep your engine from dragging on the ground. (IMG:style_emoticons/default/av-943.gif)
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Woody
post Apr 14 2011, 11:14 AM
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Yeah I know all that but it's cast iron. I would think a tubular mount could be just as strong and much lighter.
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Cevan
post Apr 14 2011, 11:23 AM
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I think he may meant in compared to say a 911 engine bar. My guess is that it was a low-cost option (cheap to design and make).
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windforfun
post Apr 14 2011, 11:34 AM
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At least it isn't made of reinforced concrete.
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ChrisFoley
post Apr 14 2011, 11:37 AM
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It lowers the CG of the car.
Its forged steel, much stronger for the application than cast iron.
Feel free to drill lots of holes in the web. I have one like that somewhere.
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Woody
post Apr 14 2011, 12:41 PM
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QUOTE(Racer Chris @ Apr 14 2011, 12:37 PM) *

It lowers the CG of the car.
Its forged steel, much stronger for the application than cast iron.
Feel free to drill lots of holes in the web. I have one like that somewhere.



Sweet, thanks Chris. I have an extra one I'll use just for that.
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Cevan
post Apr 14 2011, 01:13 PM
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QUOTE(Racer Chris @ Apr 14 2011, 01:37 PM) *

It lowers the CG of the car.
Its forged steel, much stronger for the application than cast iron.
Feel free to drill lots of holes in the web. I have one like that somewhere.


Forged steel? I take back my comment about it being a low-cost option.
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Root_Werks
post Apr 14 2011, 01:22 PM
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QUOTE(Cevan @ Apr 14 2011, 12:13 PM) *

QUOTE(Racer Chris @ Apr 14 2011, 01:37 PM) *

It lowers the CG of the car.
Its forged steel, much stronger for the application than cast iron.
Feel free to drill lots of holes in the web. I have one like that somewhere.


Forged steel? I take back my comment about it being a low-cost option.


(IMG:style_emoticons/default/blink.gif)

No kidding, I would have figured the bar to be cast, cheap and easy to produce.

They do seem heavy.
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Rob-O
post Apr 14 2011, 01:22 PM
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Looks like cast steel to me, not forged.
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J P Stein
post Apr 14 2011, 03:45 PM
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Haven't seen one in years but, IIRC, forged steel.
It pays to learn the visual difference between forgings & castings......like when someone is trying to sell you pistons. (IMG:style_emoticons/default/biggrin.gif)
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Woody
post Apr 14 2011, 04:02 PM
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I just havent looked at it lately. (IMG:style_emoticons/default/idea.gif)
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Dave_Darling
post Apr 14 2011, 05:43 PM
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Tubular mounts tend to have some spring to them, which doesn't help the rockin' and rollin' that the engine will do. On some Six conversions, the tubular mounts apparently flexed to the point where they fatigued and broke.

The stock side-shift motor mount bar does seem somewhat overengineered, though. You can take some weight out of it, but the weight is in pretty much the least harmful possible location, in the middle of the car and down very low. It would probably be better to take a quarter of that amount of weight off the top of the car, or half of it off of one end or the other.

--DD
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URY914
post Apr 14 2011, 05:51 PM
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I fab'ed this up several years ago just for fun. It raised my CG up several inches I'm sure.

Attached Image
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Woody
post Apr 14 2011, 06:16 PM
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Ury are you currently using that bar? If not how is your engine hung? I was waiting for your response.


Yeah im sure the center of gravity would be raised but only minimally. I don't think it would be that hard to Fab something up that's half the weight and just as strong.
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URY914
post Apr 14 2011, 06:50 PM
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Yes the bar is on my car now
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Woody
post Apr 14 2011, 06:55 PM
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Yeah I think im gonna have to make me one of those.
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