GC1 chassis

[kamineko]

differences between a GC1 and GC8 chassis?

i know there are subtle structural differences between each model (version) of GC8 chassis but wondering if there's anything substantially different on a GC1 that i need to address for a track car while its stripped

[Guest boostcut]

they have less spotwelds holding the chassis together aparently? but i know when ppl build retnas they usually seam weld them to stop them flexing and ripping seams etc...

[kamineko]

hmm anyone done or had this done? might be better in the long run to cage it

[Guest boostcut]

yeah man, that would be ideal... seam welding is easy.. get a mig, a grinder and go for gold!!!

[kamineko]

to what extent do you go? obviously the seams around the strut towers and the sills.. but what else is worthwhile?

[dubbedup]

all up under the gaurds, all accoss the floorpan, along the rear seat area, basically pull everything out and start stiching!

[kamineko]

sounds like fun

so assuming i learn to weld to a reasonable standard (well i have a dead chassis to play with haha)

who has attempted their own msnz rated roll cage? there must be guidelines or spec avail to look at

[wrx_lou]

 kamineko said:

who has attempted their own msnz rated roll cage? there must be guidelines or spec avail to look at

I would think something like that would need to be done by a ticketed welder.

[kamineko]

or signed off by a ticketed welder?

[wrx_lou]

 kamineko said:

or signed off by a ticketed welder?

Yeah you could probably do that if you can get up to scratch. certainly be a handy skill to learn in the process too.

[Guest]

there is some info on the motorsport site about the welding and joins etc. . . somewere

-smurff

[nt_a_foz]

 wrx_lou']

[quote name='kamineko said:

who has attempted their own msnz rated roll cage? there must be guidelines or spec avail to look at

/quote]

I would think something like that would need to be done by a ticketed welder.

Im pretty sure you dont actually..

IIRC you send your photos of some welds in on the cage if they think it looks ok then a ok..

[dubbedup]

i got a book with it all clearly stated tc etc... i'll go for a dig and try and find it for you.

[NotAWhiteGTB]

Nick, the worst thing about seem welding a car like a retna, is that that instead of having decent amounts of seam welding is that it is held together by adhesive more or less, and you have to get rid of it all before you weld it up more.

And getting rid of it makes removing sound deadening seem like fun!!! The firewall in a retna is almost completely glued in, and it is a real c&*t of a job.

My personal opinion, is get a 4 door again, parts are easier to find if you have an off. Everyone i know that has tried hurting a coupe ended up hurting their wallets trying to fix it.

[Guest boostin]

Get the shell acid dipped maybe?? That will remove all the sound deadening and will let you see what you have to deal with.

I've heard of turbo engines in N/A shells twisting the chassis, so yeah, they're not as reinforced as a turbo shell.

[Koom]

 nt_a_foz']

[quote name='kamineko said:

who has attempted their own msnz rated roll cage? there must be guidelines or spec avail to look at

/quote]

I would think something like that would need to be done by a ticketed welder.

Im pretty sure you dont actually..

IIRC you send your photos of some welds in on the cage if they think it looks ok then a ok..

Don't need to be ticketed. I made a few cages for a local motorsports team a few months back. You can buy pre-bent cage kits for a GC8 chassis that require you to scallop out the ends of the tubes yourself and get it to fit correctly. Could be done with an angle grinder and some skill. The welding just has to be tidy looking as MNZ just want photo's as far as I know.

The details that you need to follow are laid out in the back of the motorsports manual.

I agree with Clint, seam welding a glued together chassis is soul destroying work.

[kamineko]

thanks for the advice

i am looking at a 4-door NA but i suppose it has the same problems. maybe ill just stick to GC8

[Guest]

 Koom']

[quote name='kamineko said:

who has attempted their own msnz rated roll cage? there must be guidelines or spec avail to look at

/quote]

I would think something like that would need to be done by a ticketed welder.

Im pretty sure you dont actually..

IIRC you send your photos of some welds in on the cage if they think it looks ok then a ok..

Don't need to be ticketed. I made a few cages for a local motorsports team a few months back. You can buy pre-bent cage kits for a GC8 chassis that require you to scallop out the ends of the tubes yourself and get it to fit correctly. Could be done with an angle grinder and some skill. The welding just has to be tidy looking as MNZ just want photo's as far as I know.

The details that you need to follow are laid out in the back of the motorsports manual.

I agree with Clint, seam welding a glued together chassis is soul destroying work.

Hey Koom where do you get these pre bent cage kits?? And roughly how much?? Very intrested in this, i never knew that you could buy them as a kit.

[kamineko]

^ plus one

[nt_a_foz]

id say you could buy some off any place that makes subi cages regularly alot of them would have them prebent lying around ready for the next car

[Shale]

Kami: read this thread. http://www.rs25.com/forums/f145/t103292-team-rd-27-gc8-sti-race-car.html

Also. You know what sort of N/As are still GC8 ;)

[Guest boostin]

 Shale said:

Kami: read this thread. http://www.rs25.com/forums/f145/t103292-team-rd-27-gc8-sti-race-car.html

Also. You know what sort of N/As are still GC8 ;)

Thats a good write up. And damn they've spent some coin on that build!!

[Shale]

HECK YES they have ;D That thing is a GM1 from memory (for some reason the yanks have to differentiate the coupe from the sedan), but same idea. Scrape out the adhesive, bash off the deadening, cage it like a caged thing and slap it silly with the power mods

[kamineko]

WOW ok i don't have a year to do that before MM

its things like this that make u appreciate the RA chassis :'(

[Shale]

Damn straight.

It may be worth seeing if there are a few N/As around with a lighter chassis. I was under the impression that the HX20s and the SRX are lighter, considering they are 1160kg. Kinda pricy car to rip to shreds though. But at least they are already 2.0L AWD.