In the dusty corners of my cerebellum, I seem to recall an injunction against tube frames and challenge cars.
Having seen a few of these cars, I have to wonder where the rule kicks in?
Case in point, Miata front and rear subrames, a Mustang drivetrain and an MGB body. I need to knit these bits together, but do not wish to cross the line if it exist.
As far as I know, tube frame cars run in exhibition class. Unless they blow up spectacularly.
Keep as much of the MGB floorpan and frame in place to hold it all together and stiffen it with steel until it doesn't pretzel when you hit the gas.
You can't create your own floorpans from sheetmetal or frames from tubing.
You can blend a bunch of OEM stuff together to make a car.
hrdlydangerous wrote: You can't create your own floorpans from sheetmetal or frames from tubing.
Can you patch parts of a floorpan with sheetmetal?
Of course.
The gust is that the majority of the floorpan has to be there. To the point that a visual check would confirm that it was a stamped floor pan.
Considering the potentially rusty nature of Challenge car donors, patched floor pans are expected.
I think the rule of thumb is to start with a stock frame/floorpan and cut it up to fit the parts you want to use in the car. Rather than build a tube frame and cut a floorpan to fit in the car. The results may look nearly identical, but the spirit is different.
Look at the article on the CRX Corvette amalgamation for some inspiration.
Clearance as required to fit new parts, rebuild as necessary to meet your requirements. There have been many cars, including my N600, with major sheetmetal modification required to fit new parts. This is definitely a blurry line which requires you refer back to rule 1.
Bryce
It's a blurry line. The spirit of the rule is to make only the modifications nessisary for whatever swap creation you have come up with. There is some grey area. Such as in our Lotus build the original floorpans are fiberglass and won't pass NHRA tech so they have to be replaced. It's not done for a competitive advantage, only to meet the safety rules. You will have to make your case on any mods.
You could always shoot an email to Per and say "this is my plan, we cool?"
In reply to Gasoline: Whoa
Mr Gasoline:
WTF!
Looks like someone is building a "stock frame" sand drag truck. Basically just build a tube frame around and through the stock frame and call it good. Although I think I would just ziptie/Dzus that cheese in place.
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