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Old 01-01-2006, 07:31 AM
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Top Chop by lowering windshield into cowl

Does anyone know of an article WITH PHOTOS on chopping a top by lowering both the A-posts and windshield into the cowl?
Thanks,
Peace
Chaz

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Old 01-01-2006, 09:12 AM
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Personally I think it is a lame way to lower the roof. What kind of car are we talking about?

Lets talk about it, why you would do it and why you wouldn't.

Brian
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Old 01-01-2006, 09:17 AM
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Probably to avoid cutting the glass..................easier to get the glass cut in my opinion.
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Old 01-01-2006, 09:33 AM
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Poncho, I understand that you do it to save cutting the glass, my question is more of why would you want to save cutting the glass by lowering it.

It really depends a LOT on what kind of car whether you would even think about it. I understand there are some cases you may think about doing it, but without knowing what kind of car and how much of a chop is planned it is pretty hard to give an opinion.

Now, that is jumping at the conclusion Chaz WANTS an opinion. But honestly, we need a make, model and year to provide the info asked for anyway right?

Brian
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Old 01-01-2006, 09:48 AM
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i would rather wetbelt 2 inches of a windshield than try to do this. tons of work, only time i saw it look right was when the cowl was below the hood with hidden wipers.
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Old 01-01-2006, 11:51 AM
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This is something I have been wondering about also. I want to do this on my 60 T-Bird and luckily there is a write up in one of my top chop books on doing the 58-60 T-birds. The chop seems easy enough but I have been reading a lot on this forum on the difficulty of cutting curved windshields. A new windshield for my car is about $500.00 and good used ones are hard to find. The book says that lowering the windshield is an option. Is there a correct way to cut these curved windshields?
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Old 01-01-2006, 12:57 PM
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im going to have to asume that the car he wants to chop is the 51 hudson that he mentions in his "new member" thread

ive never heard of anyone that actualy lowered the a pillars into the cowl, as that would take alot of work, usualy the bottom of the windsheild area is modifiedso that the cowl area is flush with the flange of teh windsheild. so that the window could be slid down

after that, you chop the top just like any other job, and just make sure that you set the windsheild posts at the proper angle so that they fit the windsheild after everything is said and done

after that, you have a few options for mounting the windsheild. you can skip the use of the original rubber, and use windsheild epoxy and the rubber from a newer windsheild, you can also cut the stock rubber so that its just the top & sides, then use either epoxy or byutle (spelling?) rubber across teh botom to seal it

sorry that i dont have any pics of this style of chop ... hope this helps tho
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Old 01-01-2006, 12:58 PM
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I did not ask for an opinion on whether or not lowering the windshield into the cowl was lame or not. I had specific reasons for why I am considering doing it this way. Besides, I have already produced an award winning convertible using the other method (cut the glass) plus I chopped the top bows and have a working top.
The car is a '51 Hudson. The reasons for considering this way for "chopping" is:
1. The cowl and windshield come together at an angle rather than a gentle curve from cowl into the windshield as per my '47 Ford convertible. This means that it will look very much like the original from a few feet away.
2. I am not using the original cable type windshield wipers which runs thru the firewall.
3. The windshield has so much curve that the windshield wiper transmissions point out at extreme angles which makes it very difficult to connect them mechanicaly. How do I know? I already tried this.
4. Any other aftermarket unit will not work due to the large trough that runs the full length under the windshield.
5. I plan to build a cover where the cowl vent used to be and will go across from side to side and over the transmissions shafts that hide the wipers.
6. That glass is expensive.
7. I enjoy creating things since I am an Artist by profession.
8. It is also being converted from a 4-door sedan to a 2-door HARDTOP CONVERTIBLE.
9. Besides, I want to do it my way.
Enclosed is a pic of my car I have already done a chop on so I think I can handle another chop regardless of the method.
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Old 01-01-2006, 01:35 PM
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Well, I have to tell you, sometimes not asking an opinion doesn't mean one doesn't need to hear it.

Unless you were to see this modification ON a 51 Hudson, any photo essay isn't going to help much. How to do it on a 59 Chevy isn't going to do much good.

I think if you have the skills to make that awsome 48 Conv you have the skills to figure this out, because that is exactly what you are going to need to do. First, decide if you are going to urethane set the glass in or use the original seal. That would make a big difference on how you do it.

I would assume, without having a 51 Hudson in front of me you are going to need to basically section the cowl and firewall while living the sides of cowl where the door bolts untouched. I think if you were to look at it that way, simply section the whole "inner" cowl down while living the door hinge area alone. Leave the dash "floating" where it is.

Now, there may be one thing that you have overlooked. The surface contact area of the wipers are designed for the driver to be looking thru the middle of WHILE the wiper and windshield are up in the stock location. If you lower the windshield AND wiper as an assembly you are lowing the surface contact area of the wiper as well. The middle of the contact area is now going to be down even with the cowl panel cover and hood, NOT at the level of the drivers eyes. The drivers eyes will now be level with the top of the wiper contact area and off the top side of it, rendering them nearly useless.

If you want to get an idea of how this will work, draw a line on the glass on the outer wiper contact area. Then raise your seating position up by putting something on the seat raising your head up. Look thru the windshield at that point and see if your "new" windshield and the proximity of the "new" wiper surface contact area is going to work for you.

Brian
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Old 01-01-2006, 02:46 PM
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While putting in the time and energy to accomplish this mission of lowering the windshield into the crowl, why not make it an electric window that can lower into the area between the steering collum and the firewall? Then you could adjust the fresh air blowing in your face when you drive. I bet that would be a first.
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Old 01-01-2006, 02:58 PM
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Quote:
Originally Posted by saxaphone
While putting in the time and energy to accomplish this mission of lowering the windshield into the crowl, why not make it an electric window that can lower into the area between the steering collum and the firewall? Then you could adjust the fresh air blowing in your face when you drive. I bet that would be a first.
A` lot of the 30s cars had a pushout front windshield, that accomplished just that.
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Old 01-01-2006, 03:03 PM
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Quote:
Originally Posted by saxaphone
While putting in the time and energy to accomplish this mission of lowering the windshield into the crowl, why not make it an electric window that can lower into the area between the steering collum and the firewall? Then you could adjust the fresh air blowing in your face when you drive. I bet that would be a first.
the windsheild when fully lowered would extend out of the firewall

and it would run into the windsheild wipers

and if the windsheild wipers were movd to the top, they would fall in towards the car when the winsheilds down, and you would have to hold them both out WHILE hitting the button to raise the windsheild

modern AC systems > opening windsheilds
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Old 01-01-2006, 04:21 PM
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Wow! This got my creative juices going.
Brian:
I like your input about the wiper blade coverage and where to make some cuts. I will make a mock up to create where I get coverage by the wipers. I will only have a 2" chop so it may not be a big problem since I can get a slightly longer wiper arm.

Saxaphone:
Whatever you are smoking, I would like to have some of it. The electric windshield moving up and down is a stroke of genious. Talk about getting bugs in your teeth. I may use this concept some other place since I think the State Troopers would take a dim view of this.

lowRollerchevy:
Wipers on top? Not bad. I could deal with wiper blades on the inside. How about horizontal wipers like Venetian Blinds. They could move up and down to cover all of the windshield area. "Park" could be either up or down. They could also be configured to "blind" position to act as a cool sun visor. Oops!! Darn it, I almost forgot about the Venetion Blind cords getting in my face a 80 mph.

Guys, seriously, this is helping even if it is just bouncing around fun ideas. I think the convertible hardtop project on this car will be harder than this top chop.
Thanks.
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Old 01-01-2006, 04:27 PM
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Quote:
Originally Posted by themodernartist
I think the convertible hardtop project on this car will be harder than this top chop.
Thanks.
I think you are right. However, none of this stuff is "hard" it is only "time". Making a life size version of the white house out of match sticks, it only takes time. It isn't hard.


Brian
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Old 08-06-2007, 10:45 AM
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Whatever you do, start a Journal and show it to us. I may be inheriting a similar top chop job on a 50s Hudson so will need the info.
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