Tachout's Project....
I may need to do a TH400 conversion eventually and i am very concerned about fabbing and attaching the required crossmember. in my mind i just can't figure out a good way to do this.


Mike


Very nice preliminary design Sam. I am guessing it will not take much to design this so it fits my Coupe. I will be putting wheels on it so once the car is up there, I will make it so it can be moved around. Goal is so the wheels can raise and lower, and that will not be too tough to design into it... I know how it is done. As for the heads, I just need to pull off the front bumper cover, and unbolt the front bumper, and will make a plate to bolt on each mounting point right where the bumper was originally mounted, and then in the rear, there is just a pair of open frame rails, and when I know where they locate, with the same style place, the it is a matter of knowing my centerline of the car, and knowing where the mounting points are in relation to the centerline. I do plan on making mine a little adjustable if needed but not much room to play. Have to be really close. Once I go to build it per my plans, I will make sure to actually build it as I mount to the car, and reverse engineer that end of the numbers to make sure everything is where it needs to be.

Beyond that I had a little time today to look at the rotissarie and do some math, and start on a design. Here are the few things I want to design, or change.
1. I need to design a head that will hook to the car on each end.
2. I want to put it on wheels so I can roll it around once I get it up in the air
3. I decided that I want to put both ends on Hydralics. Idea being to be able to roll up to the car in the full down position. Bold the heads on, and then jack it to the correct height to be able to rotate the car fully. I want to be able to have some room when rotating, and I want to be able to possibly lift it a bit more, but be able to let it down some when working in any position... Idea lower center of gravity, the more stable.
4. Make a chain drive so I can rotate with a crank handle and lock in any position of rotation. (Have a great idea how to do this using a timing chain I have laying around.)
Plans are in the works, and when done, I will post up the plans, and will show the build... Once the car is up, and rotating, I want to get so I can get the rest of the body work done, and I want to be able to get in there and put in the rear tubs, and the rest of the interior tins, and allow for the fuel cell, rear electronics, battery location, and fuel pumps and all. Then plan on where the exhaust will run under the car. I want to clean up the trans mounting area, and do some work under the car with everything unbolted and out of the way. If I can do this by rotating the car, it will make all kinds of things easier to get to.
To do this I am going to want to do the rotissorie, and then I am going to want to do the following to the car.
1. Remove Hood.
2. Remove Targa Top.
3. Remove Rear Glass.
4. Remove Engine and Trans.
5. Remove Seats and any loose stuff inside the car.
6. Remove front bumper cover.
7. Bolt on heads and lift car so front tires clear.
8. Remove front tires.
9. Remove bolts holding in rear suspension and rearend and rear tires.
10. Raise car a little more and then check stability.
11. Raise car up so it can rotate fully.
The Best of Corvette for Corvette Enthusiasts
You are talented, and I knew it was a huge undertaking, but you seemed like a guy who could get it done.
My cars arent half of what you are building, and I've almost given up a few times. My wife was actually the one who encouraged me to finish them.
Think long and hard before you jump ship!
Anyway,
GLWS!
First thing I am going to do is support the back of the body with a pair of nurf bars, with supports. Lets see how far I got today.
How it looked when I started:

Time to break out the Harbor Freight Special Tube Bender:

Bent the first bar, and put it up on the frame rail with a C-Clamp to see if I like it.

Bend the second bar to make it match the first bar where it counts:

After a bunch of cutting, and grinding to get it to fit, and then welding it in place:

Cut the second one, but have not ground it or welded it in:

This is what it will look like when welded in place:

First thing tomorrow I am going to get the bar ground, and then weld it in place. After that I am going to get the bar welded between them. From there I am going to create a rear sheet metal pan. Then get the rear mounts in place to bolt in the rear sheet metal pan on. Once I get that completed, I can then cut fit the tubs, and the interior sheet metal in, and get it buttoned up inside. Once I get that completed, I will pretty much be out of money to work on it for a while. I will either need to get a better job, or get a raise at the job I am at before I can put any more money into it. Just have to work harder I guess.











I still have some fitting and sizing, and I want to grind a bit off of the bottom of the main hoop so that I can put plates between the roll cage, and the frame. I am fairly happy with the fit, and I think it will be a fair match between body and cage. For anyone who has ever put a cage in, getting a good fit to the body makes a world of difference and I am glad I am taking the time to grind it tight. So many cages you see in C4's the main hoop is straight, and not bent to contour the body, and after that the seats fit bad, and you can see the cage just does not look right. Mind you it takes a lot more work to get it right, but I think it is worth it. Putting in the other door bars, the front bars, dash bar and halo should complete a very tight cage.




















I hope you are feeling better and good luck to you.
