Technical > Roo Man's Room
Chassis question
HOTRODFL:
Roo, slip joint in top tube just in front of motor plate where tubing steps down 1 size, should the angle be on top and angled forward as I was getting ready to do or under and back. Two local chassis builders both go with the under/back method ?.
One more question, 4 tubes going to the front, which set of tubes U/L would you keep whole and which set would you cope to blend to front end assy. Thanks...
rooman:
I really don't think that it matters as the main reason for the angle cut is to spread the junction along the length of the tubing. Don Long's in cockpit splice has the angle raked forward from the top and he is way smarter than me so that is how I do mine.
On the second question I presume that you are talking about a torsion bar style frame where the top and lower rails are run straight to the junction and in that case I cope the lower rails. Make sure that you make the overall height of the two tubes taller than the cross member so that they wrap around it. Two reasons for this, first you end up with the torsion bar/cross member being tied into more of the frame rails and second, wrapping the weld further around the cross tube reduces the tendency for it to bow when welded. In the same vein, a tight fit is mandatory for the same reason.
Roo
dreracecar:
Top foward-bottom trim back
I prefer to do the trim on the bottom, reason being that I can easily remove the top tube and trim the bottom in place and then drop the top tube on for fit, repeat as many times to get it fit proper.
Also at the point of where the front torsion attaches to the frame, that the frame ends are at least 3/8" above and below the dia of the torsion tube. That way you will get enough wrap around the TT and the fit and welding of the framerails at the taper isnt too long.
dreracecar:
Both students of Long.
As Don would explain "A runners body is slanted foward, just looks fast"
HOTRODFL:
Guys, thanks for the input....
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