Gauging Interest: Tubular Rear Subframe... 5 people minimum

I know when we went with chrome-oly front subframe parts on my old car we shaved around 30lbs (three bolt in parts).

387 would be insanely awesome lol

Yes it would be but that's not possible...

Rear subframe with arms weighs rougly 110lbs

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Originally Posted by sublime_whatigo

61lbs for the subframe with mounts, trailing arms weigh 47lbs with lower arm, maximal upper, e-brake cable and abs wiring. Basically everything but the pads,rotor, and strut. Rakuny's parts are not at his house so I figured this would be faster since I'm doing almost the same thing as him.

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Front Subframe with arms weighs 80lbs

Bolts and misc other brackets and crap weighs about 30lbs.

So combined they weigh roughly 230 lbs.

Sorry that it's not the savings you guys expected. The information spread by others others being NRG was mis-stated and incorrect. A tubular subframe does not shave 387lbs.

Maybe their numbers were drastically different since the pretty much tubed the front of the car underneath also? Id like to think anyone capable of building that are capable of weighing them....

Jason

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Originally Posted by JasonY

Maybe their numbers were drastically different since the pretty much tubed the front of the car underneath also? Id like to think anyone capable of building that are capable of weighing them....

Jason

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That I see possible, they weighed the entire car before and after. They tubeframed almost the whole front end.

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Originally Posted by J. Fast

Alright so here's everything laid out so far.

1) 8 hrs of chassi probe work and tracing of front and rear subframes for solid work loading $750

2) 3R Racing Optimized Suspension Geometry Analysis $750

3) CAD design for front tubular subframe, control arms, and upright adaptation $2250

4) CAD design for rear tubular subframe, control arms, and upright adaptation $2250

5) Cost to build 5 full front and rear subframes, provide new control arms and end links, and a Moton, JRZ, Penske, or Bilstein upright adapter $6500.

6) Materials $2600

Total: $15,100

Split between 5 people and that's $3020 for a set. That will be for a front and rear subframe, control arms, suspension links, and upright adaptation.

$1510 for the rear subframe and $1510 for the front. That's as Real as it gets for a group buy. Sorry to say 3R Racing has a minimum and they won't touch it for less than that price as it's quite a bit below their standard minimum. I wanted to do just the rear for now but it doesn't look like the geometry will work unless you do them in pairs. The front and rear will need to be swapped out simultaneously.

If there is no interest it will be an as-build and nevermind.

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You know people that bitch about part prices? (Me included at times). Well some just don't understand things like this. I'm not saying anybody in this thread doesn't, but a lot of people in general just don't understand it. It isn't just parts and metal, it's research/testing, labor, tools and etc. Maybe the occupy crowd could do a field trip to a R&D job.


Sorry, for the OT

the rear subframe is heavy as fuck though. i didn't weight it but that sucker was heavier than my trans. i did awd delete and i lowered it with my trans jack. it was a bitch to pump it back up. much harder than lifting the trans.

any progress?

LoL, my subframe's are done. They were as-built. There was no interest (except for Steven). Not enough to warrant a group buy so it died. The number still stands though, if you guys are interested. It would require 5-6 interested people.

Honestly 3020$ is not expensive in my opinion. Very reasonable.... i dont have that much money right now to spend but...lol