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Author Topic:   Opinions - New frame or repair rear clip?
BrianW
Member
posted December 08, 2003 10:06 AM
Last year was my first year in modifieds, and at the end of the season I got rear-ended pretty bad when avoiding a pile-up. The rear end got pretty bent up, and with some work we got it back in-line enough to finish out the last 2 races. now the question for the winter: Is it worthwhile to re-stub the rear or just swap everything over to a new frame? I've got a welder and basic fabrication tools, and am planning on purchasing a tubing bender. The car is a '97 RCF, all the damage was behind the rear suspension mounts (2/3-link) I plan on re-skinning the car so that cost isn't an issue. If anyone is wondering you can see some of the pics here - just scroll down to the 9/5/03 pics.

I was thinking if I could get a basic rolling chassis for around or under $1k that would be my "break-even" point as far as the repair time vs swapover time...

How much do inexpensive rollers go for? Any chance on picking one up for around $1k?? Even something without wheels/tires, shocks, springs??



Chad
Member
posted December 08, 2003 10:16 AM
Just my opinion, but since you're only in your second year, I'd suggest reclipping the rear. On a three link car, the only thing the rear clip does is support the fuel cell and mount the rear panhard bar. You might be able to get away with only cutting the frame behing the chassis mounts and replacing the underslung tubes and possibly bending the upper tubes to match (I did this a few years ago with my car). As for the panhard bar mount, that's no big deal, just get your left side tires lined up by stringing and you should be good to go. If you have the money, buy a new chassis, but I don't think it's necessary if the clip is truely bent rearward of the chassis mounting points. By the way, have a good fabricator help you design and weld everything up. Safety is the most important thing.


zeroracing
Member
posted December 08, 2003 10:55 AM
I told you I would give you a hand fixing that thing Brian. From what I saw, I agree and think it shouldn't be too big of a deal to get it fixed. For what you had in that car, it was pretty competitive out there. By the way, shoot me an email and let me know what's going on. I seemed to have lost yours while I was on vacation.

John

BrianW
Member
posted December 08, 2003 12:51 PM
Chad - thanks for the opinion... that's the way I was leaning seeing how it didn't "do" much back there. I wasn't going to redesign anything, just recreate what's there with "straight" tubes and make sure that it's all welded up right.

John - I'll be sending you an e-mail soon...


66jj
Member
posted December 08, 2003 01:39 PM
fix it and make the back half bolt on.

if you look at lefthander pavement late models they have bolt on tails, very easy to do..



BrianW
Member
posted December 08, 2003 01:50 PM
quote:
Originally posted by 66jj:
fix it and make the back half bolt on.

if you look at lefthander pavement late models they have bolt on tails, very easy to do..


Interesting.... Now that's something that I haven't seen! Any chance you have pics of that setup?? I'm hoping that this isn't a regular occurance, but you never know.

zeroracing I am located in Kansas City if you know anyone with a chassis or chassis jig....

[This message has been edited by BrianW (edited December 08, 2003).]

NJantz
Member
posted December 08, 2003 02:09 PM
check out www.m-mmotorsports.com . They use bolt on rear clips. Save the pics and then veiw them on your PC. THey are much larger than they appear on the web page.

Good luck,
Superdave


66jj
Member
posted December 08, 2003 06:32 PM
I can email you pics of my rs door bar, it bolts on.

I used flanges on the main cage and a larger diameter tubing on the frame up behind the front tire that it slides into at a 45 degree angle. It uses both methods.

Its very easy to do to a over, under slung car. basically cut your tubing of behind the axle, then go straight down with usually 2x2 square, connecting the upper frame and lower together.

then just add flanges or tubes for the rest of the needed frame to attatch to, basically a box for your cell, and rear bumper mount. I would attatch the rear deck support to the chassis in front of the bolt on parts. It makes a nice crush zone if you keep it a little weak and will surely make repairing future crash damage easy.



66jj
Member
posted December 08, 2003 06:41 PM
m-m look at the underslung car the over only has bolt on rear bumpers and takes a lot longer to load. not a rear clip enough to be helpfull. under slung is almost identical to lefthander....

[This message has been edited by 66jj (edited December 08, 2003).]

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