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 Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension,
 
Project Land Speed Racer 240SX: Chassis Prep and Roll Cage Fabrication
 
By Chuck Johnson
 
 
Ah yes, the beginning of any good sedan type racecar build almost always starts with ruining a perfectly decent streetcar. In the case of Project Land Speed Racer 240SX though, I'm not sure if we are really ruining a perfectly good streetcar. Honestly, from the looks of things, it must have been owned by a series of wannabe dorifto hacks before falling into my hands. If anything, I think we saved it from a continued life of embarrassment running around with its "demon camber," four corded tires, and doing a crap ass job at pulling off that coveted hellaflush style. 
 
Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension,
 
God damn, give me a gun, let me shoot this car, and put it out of its misery. Or better yet, anyone have that flamethrower attachment from Call of Duty Black Ops? Let's roast some marshmallows! Ok never mind, there are already too many S13 chassis in the junkyard and the 240SX seems to be making its home on the endangered species list somewhere between the Bug Eyed Frog and the Zululand Black Millipede. We're gonna have to do the "right thing" and save this one… That is, save this one to claim our small piece of history with.
 
Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension, Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension,
 
To start off the build of Project Land Speed Racer 240SX, we needed to prepare the chassis for the roll cage construction. This is probably the most therapeutic part of building a racecar, especially if you don't care about how the interior comes out. In our case we started out caring, methodically removing the interior panels with the intentions of selling them for a few bucks. About half way through though, the beer kicked in, we came to our senses, and just started tearing, ripping, and gutting out the interior. It just wasn't worth spending our precious free time getting flaked on or haggling over a few bucks. 
 
Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension,
 
Fortunately, we sobered up from our rampage just in time to carefully remove the interior wire harness, which runs throughout the cabin and under the dash. We disconnected it at the super multiple junction box, which is on the driver's side underneath the dash. Since it would be months before we reassembled the car again, we also made sure to label all of the important connectors using masking tape and a sharpie.  
 
Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension,
We found several interesting modifications to our wire harness. Surely, this one was performed by a highly skilled electrician. 
 
Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension, Roll cage fabrication, 240sx, S13, Nissan, Silvia, 180SX, land speed racing, SCTA, Racecar, s14, s15, 200 mph club, land speed records, blown gas coupe, moto iq, annie sam, chuck johnson, joe lu, el mirage, bonneville, team rod riders, Jim Pierce motorsports, KW suspension, SPL Pro suspension, Fastbrakes, energy suspension,
  
With the interior panels and wire harness out of the way, we bought 20 pounds of dry ice to remove the sound deadening on floorboards. When you do this part, be sure to use gloves, as the dry ice will burn bare skin. Also, make sure you are in a well ventilated area unless asphyxiation via carbon dioxide is your thing. Whatever floats your boat dude. For an older car, the S13 240SX has a lot of sound deadening, which is a bit annoying. On the flat surfaces, it helps to crush the dry ice up into smaller chunks with a hammer and then chisel the sound deadening up once gets cold enough. On vertical surfaces like the transmission tunnel, we taped pieces of cardboard in place to hold the dry ice against the sound deadening.   
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Comments
Steve Choi
Steve Choilink
Tuesday, January 31, 2012 1:09 AM
I find covering dry ice with a heavy cloth for a few minutes increased the effectiveness of cooling sound deadening. Resulting in much less dry ice usage and bigger pieces of sound deadening getting chunked off.
8695Beaters
8695Beaterslink
Tuesday, January 31, 2012 7:10 AM
Hey, that wiring looks as ghetto rigged as my car! I wonder what it is about S13s and bad wiring that seem to go hand in hand?

As always, MotoIQ brings us some of the coolest and well designed new race cars. Can't wait to see how this one turns out. I love my 240SX and it always brightens my day seeing someone do something different with one. Very tired of seeing poorly built "drift" cars all the time.
Dusty Duster
Dusty Dusterlink
Tuesday, January 31, 2012 8:10 AM
That is a sweet roll cage.
oldx18
oldx18link
Tuesday, January 31, 2012 9:34 AM
I miss my "Pig-nose"...(sniff) Died protecting me in a T-bone at an intersection.

It's a shame that the Dorifto posers are sending these cars to the junkyard. Then, like dogs at the pound, they are on borrowed time until the crusher...
Der Bruce
Der Brucelink
Tuesday, January 31, 2012 2:28 PM
High quality workmanship! Are you guys going with a custom simple aluminum dash?
Subasean
Subaseanlink
Tuesday, January 31, 2012 2:57 PM
I need to get around to rescuing an S13. I saved a 1959 Ford retractable from the crushers last year, and need to get my "nice" car STi before the Summer, but with the number of poor little S13s I see dragging stuffed animals across the Walmart parking lot, spinning that one Riken Raptor down to the cords, I think I may need to put my Prelude's H22 swap on hold before they're all gone. I can stack it out back with the wife's Corvairs til I can get around to it.
SkullWorks
SkullWorkslink
Tuesday, January 31, 2012 3:50 PM
I would have said the cage is just way too beefy...before i saw the video...so what no room for 2.5" x.250 DOM??? lol

Looks good I love the fitment and the door bars and floor plates are pure sex

PROTIP: use LN2 next time for the sound deadening, did my last S13 in 25 minutes...I told you on facebook to hit me up, could have saved you hours HAHAHA
SM_Clay72
SM_Clay72link
Tuesday, January 31, 2012 5:53 PM
I've never had to use chemical assistance to remove sound deadening. A good chisel, hammer, good technique, and a proper Canadian winter worked for my SM and MR2. Even not in winter I find if it's below 25 (celcius) its not a big deal to chip out.

Side note, on AW11 MR2s there are cast iron chunks bolted to into the chassis inside of the seat mounting portion. Vibration damping?
Mathes
Matheslink
Tuesday, January 31, 2012 9:26 PM
I think the worst effect the Dorifto guys have is they drive the price for clean S-cars through the roof. They did it with Civics and then DSMs :(
sr20freak
sr20freaklink
Tuesday, January 31, 2012 10:55 PM
The roll cage looks bad a$$ Chuck!
Dru
Drulink
Tuesday, January 31, 2012 11:56 PM
I've been building a 240sx for a few years with an eye to land speed racing and time attack. I origianlly started welding in the all of the rear braces to a large bar welded between the rear shock towers, just like your cage. But the more I think about it the more I regret it.

The rear is not a strut design like the front. So the majority of the rear chassis forces are going through the four points that the rear subframe conects to, not the shock towers! If you're willing to extend the kickers through the floor, there is actually a decent lateral beam directly above where the rearmost rear-subframe mounting locations are. Then if you want to get real trick add that bottom x to just above the foremost rear-subframe mounting locations are.

Here's my tower bar I'm considering cutting out.
[IMG]http://i69.photobucket.com/albums/i70/SicBastard/IMG_0319.jpg[/IMG]

And here is Hot Lap Motorsport's (in Spain) latest. It is the closest attempt to what I'm thinking about, concentrating on having the kickers tie in directly above where the rear subframe ties into the chassis.
[IMG]http://i69.photobucket.com/albums/i70/SicBastard/s15hl19022011157.jpg[/IMG]
[IMG]http://i69.photobucket.com/albums/i70/SicBastard/s15hl19022011149.jpg[/IMG]
Steve
Stevelink
Wednesday, February 01, 2012 7:41 PM
@dru - def on the right track there, triangulate the towers down to or even through the chassis. I'don't like holes in the car esp where your second pics show, that's sure source of dust and crap. The bolt-on solution I use in my Nissan works well for that same area - there is a top brace you cannot see here over the towers, welded tubular steel https://lh6.googleusercontent.com/-wCywk5Ih520/TynovRFr1XI/AAAAAAAAKIM/1XFI80-NloY/w500-h376-k/RSTB_w_brace_5.JPG
https://lh5.googleusercontent.com/-jlFQ29xtxxc/TynouUkuDGI/AAAAAAAAKH8/rAAmJtOXDSs/w500-h333-k/RSTB_w_brace_07.JPG
bottom bolts through the holes where the OEM gas tank goes. Not a bad setup at all for mixed use car.
Steve
Stevelink
Wednesday, February 01, 2012 7:44 PM
@Chuck - I also started using spot weld bits when I pulled the radiator support out of my U13, what PITA that would have been and the car would have had so many holes drilled in it - but the spot weld bit mostly ate the metal i was removing anyway. Nice tip!
TnF
TnFlink
Wednesday, February 08, 2012 5:25 PM
"A lighter color will reflect heat and ultimately lower cabin temperatures whereas a dark interior color like black can make life a bit more uncomfortable for the driver."

In fact, color plays no role in radiation absorption, transmission and reflection. Surface finish though does. Please take a look at my thermo radiation notes from last semester, there is an interesting table in there too:

http://www.mediafire.com/?9cuc5m9y6a7kbx0
Micah McMahan
Micah McMahanlink
Thursday, February 09, 2012 1:35 PM
Who are you planning to run with? I'm currently prepping my Impreza for ECTA to run at the Ohio Mile.
Tony
Tonylink
Wednesday, February 15, 2012 3:49 AM
Freezing the sound deadening out of my Z32 was incredibly satisfying, but boy do I feel your pain about those sticky wheelarch tar mats.

I eventually figured out that by slowly going over it with a heat gun, they could be softened to the point where you could peel them off the sheetmetal in one big piece.

A lot of sticky gunk was left behind, but a turpentine-soaked rag cleaned it up real good. No damage done to the undercoating either.
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