comp coupe top chop

[speedwagen]

Well here goes my first post!

Being new at this please hang in there with me!

I saw some post's concerning the issue of determining what was a "legal" chop for a Comp Coupe.

I am getting ready to chop the top on a body (G/GCC), and I would like to rake the front windshield more that the original rake angle. Would a change in windshield angle be a change to contour, as interpreted by the rule for Comp Coupe.

If I keep the stock window rake angle, then the top will need to be made longer to compensate. Could this be called a countour change as well?

[Jonny Hotnuts]

What I was told is the contour is not changed if the angular relationship between the roof and body is not altered.....if so this would change contour....so the chop has to be equal in front and back.


I was also told (pertaining to MS) is the angle of the windshield can be leaned back to meet the chop, so you dont have to lengthen the roof. I would be careful about shortening the roof to increase the windshield angle....talk to someone that knows for sure regarding CC but I would say that if the roof was shortened to increase the angle that someone may complain.


Here is a good example of a CC that has an obvious change to the stock windshield angle.

http://www.thehudsonboys.com/photopost/data/507/paint_10.jpg


Good luck.

[Jonny Hotnuts]

BTW, what body are you chopping.
THere may be a pic of the same car (or very similar) you are doing with the same chop.

[speedwagen]

It's a VW super beetle body(curved front window)

The Chassis is tube with a VW trans-axle being pushed by a 2.0 Subaru
Here is a Blog that we have on the project
http://carmelsaltcar.blogspot.com/

The nose is a stretched Fiat Topolino.

I found some interesting VW chop articles at www.runtrod.com in tech section

By the appearance of the Hudson Boys car, a Rake is OK.

Thanks for your reply

[Unkl Ian]

What I was told is the contour is not changed if the angular relationship between the roof and body is not altered.....if so this would change contour....so the chop has to be equal in front and back.


I was also told (pertaining to MS) is the angle of the windshield can be leaned back to meet the chop, so you dont have to lengthen the roof. I would be careful about shortening the roof to increase the windshield angle....talk to someone that knows for sure regarding CC but I would say that if the roof was shortened to increase the angle that someone may complain.

How about the angle on the rear window ?

If the roof is chopped level,and not relocated front to rear,
does the rear of the roof need to be stretched to maintain
the rear window at the stock angle ?

Thanks.

[speedwagen]

How about the angle on the rear window ?

If the roof is chopped level,and not relocated front to rear,
does the rear of the roof need to be stretched to maintain
the rear window at the stock angle ?

Thanks.
[/quote]

Hey Unk, good to see some other Volksrod folk over here. After looking at the pictures of the Hudson Boys CC body. We have decided to leave our top the stock length, and move it back to align the C pillars after the chop. This will lay the front window back some. We are using a curved window super to get the aero advantage.

[Ray-Dean]

Hey Unk, good to see some other Volksrod folk over here. After looking at the pictures of the Hudson Boys CC body. We have decided to leave our top the stock length, and move it back to align the C pillars after the chop. This will lay the front window back some. We are using a curved window super to get the aero advantage.

Speed, Unk is asking about a chop on a Ghia. There are no "C" pillars. It's a hard top so it has just the "A" and "B". If you were to chop it, the roof "should" be lengthened to make everything fit back up. The problem is that this will change the contour.

I guess you could rake both the front and rear windows and as long as the chop is the same front and back, it seems as though it complies with the rules. Might need more clearification on it though.

[speedwagen]

Search for Hudson Boys image to see their CC body
It looks raked all around

Whats the plan for the Ghia motor?

[Unkl Ian]

Found the Australian rules online,and will have to
assume for now that they match the Americans.

5.7. Chopping:
The removal of metal from a body component in such a fashion
as to reduce the overall height of the component without changing
the shape at top or bottom.Tops must be widened and/or lengthened
to maintain the stock silhouette of the vehicle.IE: No laid back windscreens.

5.9. Contour.
Contour is the configuration of the external sheet metal.Removable trim,lights,windows,floor boards and interior sheet metal are not part
of the contour.In the special case of chopped tops,contour is considered
to have been preserved as long as the angular relationship of the top to
the body proper is not changed.

6.3. Modified Category
This category encompasses coupes,sedans,and pickups(with full stock beds),
unaltered in height,width and contour,and with all the stock panels mounted
in original relationship to each other .......


I think 5.7. answers my question.
"Tops must be widened or lengthened....".

So it sounds like for /CC,the angle of the rear,and side glass,
should be stock,relative to the body.
-----
The Ghia has no B-pillar,but it's easy enough to
project a line for alignment purposes.

The jury is still out on the motor choice.

[Unkl Ian]

 After looking at the pictures of the Hudson Boys CC body. We have decided to leave our top the stock length, and move it back to align the C pillars after the chop. This will lay the front window back some. We are using a curved window super to get the aero advantage.

Sliding the whole roof back would be easier,as long as it is legal.

[4-barrel Mike]

Is the Ghia a 4-seater?  

5.D Modified Category (last sentence of first para)  "A generic requirement for this category is that the car will have been originally produced with suitable seating for four (4) average adult persons."

Two-seaters fit in 5.E.3 Grand Touring Sport (part of 5.E Production).  However, 5.D.4 Modified Sports is for modified GT's. "Windshields may be lowered or removed. Coupe tops may be chopped."  No height mentioned (but show up with a 3" windshield, next year the rules'll say 5").

Mike

[Unkl Ian]

The Ghia is a 4 seater.

I've found pics of some other Ghias running in H/GALT,
which is a Modified catagory,the same as Competition Coupe.
So that shouldn't be a problem.

[Jonny Hotnuts]

No height mentioned (but show up with a 3" windshield, next year the rules'll say 5").

isn't that the truth!!!

I am working on the concept of a 125cc streamliner bike as a side project with no windshield and 2  forward mounted cameras and an LCD monitor in the cockpit.

I can already hear tech going nuts!