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Author Topic:   How long will a chassis last?
Racer18
Dirt Roller

Total posts: 13
posted May 04, 2002 01:17 AM
I know most guys buy a new car every year, or every two years. But, how many nights can a chassis take before the welds are flexed and the car is no longer rigid. I know track condition and HP has alot to do with it, but lets say you run a slick 1/2 mile on Fri, and a 3/8th's with some bite on Sat. How many years will "most cars" run up front?

I have a '95 and the car won 22 features the first year, ran top 3 next year. '98 ran top 5-10, and had the car clipped in the front in '99, still have been running mid pack of the top ten.

My dad and my buddy are convinced cars last forever, and don't wear out (thier hero's raced LM's with stock frames in '70), all of the sudden it is my driving that makes us 2nd. They say to clip the rear and we will be winning again, I say different. I think we need a new car, I would like some of your thoughts to prove a point.

If I am wrong, I will clip the car and see what happens, but I think the thing is wore out! By the way, the car is a mono leaf, with a 377 .670 lift roller motor with DartII heads, 2.08 valves, and 13.2 to 1 compression.

awkwardjeff
Dirt Freak

Total posts: 390
posted May 04, 2002 02:13 AM
I say 60-100 nights depending on MANY things.
How much flex was built into the chassis, what the chassis is built out of for metal, the amount of trianlation, tracks, motors, and crashes........

With that all said, a chassis is a piece of iron, and Iron has a memory. But even the best metals in the world will take a set after being stretched enough times. The metal will lose it's memory.......leaf springs lose their memory in a few nights of racing. A coil spring may last a season or more...............

I would say your car would benefit from a rear clip........the drivers area is built to be much more ridgid then either ends. The only thing I would consider is how many holes are in the drivers area.....rivit holes, and bolt holes.............every time you wash the car water gets in there and the tubes rust from the inside making the car unsafe after a few years..........being the chassis was built in '95 I would say a 7 year old chassis should be replaced, NOT clipped.......only from a safety aspect. If you don't drill holes in the drivers area and you feel the tubes are solid clip the back.

tilley88
Dirt Full Roller

Total posts: 64
posted May 04, 2002 02:51 AM
Age does play a major role in chassis longevity and structural soundness. My experience(mostly street stocks) is with older chassis, most bent somewhere that I pick-up cheap and repair myself, but none-the-less bad-*** fast after I repair them, be it for myself or for another racer. I believe anyone with enuff mechanical aptitude can build or rebuild a chassis to be competitive, but experience helps, too. Detioration from rust and neglect also must be taken into consideration when a chassis update or rebuild is an option. If you've got the money buy new, if not, consider a rebuild!

Revelracecars
Dirt Newbie

Total posts: 4
posted May 04, 2002 07:42 AM
quote:
Originally posted by tilley88:
Age does play a major role in chassis longevity and structural soundness. My experience(mostly street stocks) is with older chassis, most bent somewhere that I pick-up cheap and repair myself, but none-the-less bad-*** fast after I repair them, be it for myself or for another racer. I believe anyone with enuff mechanical aptitude can build or rebuild a chassis to be competitive, but experience helps, too. Detioration from rust and neglect also must be taken into consideration when a chassis update or rebuild is an option. If you've got the money buy new, if not, consider a rebuild!

Racer18
Dirt Roller

Total posts: 13
posted May 05, 2002 12:09 AM
Thanks guys! one more thing, if I do clip the rear, I was thiking of changing suspension, what whould you suggest?

Thanks

tilley88
Dirt Full Roller

Total posts: 64
posted May 05, 2002 01:31 AM
Logic says replace what ya got with the same stuff(cost savings), but look at the top cars where you race before you make any decision. Most racers are more than willing to help you get your set-up in the ballpark, some will throw you off. It pays to talk to several locals and get a general consensus about what to run at the track you race at. The internet is also a valuable tuning tool, but not as accurate because of the differing track surfaces, weather conditions,etc. Also, if your going to re-clip the rear, have the builder do it on their jig, or fab your own jig to square and level your chassis. It's a tedious and time consuming job. Good luck!!

uforacing51
Dirt Freak

Total posts: 240
posted May 10, 2002 03:21 PM
One other thing I didn't see here anywhere, If its a factory car already, check with the origanal builder and see if they will do a frame dyno check on it and give you an idea where your at with it. they may suprise you with the results.

CUSTOMPERFORMANCE
Dirt Freak

Total posts: 464
posted May 10, 2002 09:18 PM
2-3 years is the most i would run a chassis. chassis get moisture on the inside of the tubing and rust from the inside out. just because a chassis is 6 years old and straight and still fast it may not hold up in a big freak accident.

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