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Old 03-31-2005, 08:24 AM
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Brian Martin,Freelance adviser
 
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John, I fully respect all your metal working knowledge, however, I don't know where in the heck that came from. This is a 47-54 Chevy "AD" pickup we are talking about. Bg, wants to "rake" the hood by sectioning only the front with a pie cut of an INCH. We are talking about THINNING the sides of the hood by an inch.

I understand where you could remove the "crown" on the roof of this truck a little. Never thought about it, but I can see how that could be done by shrinking the sides/over the up to the top. Ok, I get it, but I can' see how this could be done on the hood like Bg, is after.

If there is some metal man, any metal man that could do that by shrinking, I WANT TO LEARN.

Brian


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Old 03-31-2005, 09:40 AM
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"remove the big hump at the nose" Hi Brian, That is the part that I was responding to. I realize this is not sectioning, but it is a way to reduce that hump. It seems to me that sectioning will not remove the hump, but it will lower it. If you wrap a tape measure side to side over the hood before and after, the distance is reduced using either method. If you want to reduce the verticle section of the sides of the hood as sectioning does, the hump stays the same. If you had a mind too, you could reduce the verticle section of the hood by a lot of shrinking and using a slapper and dolly extensively to re-shape where the transition from hump to verticle is. You can also drive the transition curve lower on the panel by striking glancing blows with a slapper or hammer backed up by the right dolly....one with slightly less curve than the area you are working. This would be very time consuming but it can be done. I'm not saying this is the best way to do this project...just a method to consider. The more I experiment with stuff like this, the more I learn. My wife calls it "thinking outside the bowl" (a bowl being a common first metalshaping exercise).

In a nutshell; the hood has a certain amount of surface area...you can reduce this by shrinking, and re-form the curves by persuading the metal to do what you want it to. Not that hard to do if you have the patience....and good hearing protection!

John www.ghiaspecialties.com
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Old 03-31-2005, 09:54 AM
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Another way to do this would be to stretch the front of the hood before you cut, until it is a little past verticle when viewed from the side, so it will hinge down to meet the lower section after cutting. Then pie cut, tip down and weld. You can stretch a lot faster than you can shrink...especially using a palmnailer.

John www.ghiaspecialties.com
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Old 03-31-2005, 11:07 AM
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Brian Martin,Freelance adviser
 
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Quote:
Originally Posted by John Kelly
Another way to do this would be to stretch the front of the hood before you cut, until it is a little past verticle when viewed from the side, so it will hinge down to meet the lower section after cutting. Then pie cut, tip down and weld. You can stretch a lot faster than you can shrink...especially using a palmnailer.

John www.ghiaspecialties.com

Now THAT is a great idea I never thought of!

Brian
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Old 03-31-2005, 08:00 PM
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Somebody said they wanted a picture so here is a bottom look at a 48 Chevy truck hood...


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Bg
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