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

[J. Fast]

The front suspension will be modular and will accept oem struts. Can't say on the weight for sure yet. A good guess is rougly 50lbs on the subframe, another 60 lbs on the uprights if you wanted to upgrade to billets, 20lbs on the suspension links and control arms, and 50lbs on the swap to a lighter shock. I would think a range of 150-200 pounds is a fair guess.

I'm open to the idea of waiting and can shop this around a little more. It's a big pain in the ass though as I have to load up a chassis on the trailer and run it around for estimates and evaluations.

No immediate hurry as of right now. I can rock what suspension bits I've rounded up in the mean time and enjoy them for awhile if need be. I will eventually require the ultimate though and will build just one, ore have someone else make several.

There's still a few things to sort out and a few questions and concerns I have with the setup myself. I'll get back to those when I finish a few other priorities I'm managing at the moment. I will keep you all in the loop when I talk with 3R Racing again next week and I get more feedback.

If you guys are wondering who I'm retaining for the R&D and building of the subframe, the company's called 3R Racing. Here's some of the cars they've built and campaigned:

1) Red Line Synthetic Oil - Road Racing - 3R Racing

2) SCCA Speed World Challenge Grand Touring Class - Car Comparison - Feature Article - Page 5

3) SCCA Speed World Challenge Grand Touring Class - Car Comparison - Feature Article - Page 3

4) Subaru WRX-STi Build for NASA Endurance Racing


Here's their website: http://3rauto.com/

They also have a shock dyne, dynamic suspension testing equipment, and a tracing probe and 3D part upload scanner. They're Pro's, building the best stuff is what they do.

[CoopKill]

HOLY sssSSStudder! lol

[JasonY]

For what its worth, Nelsons subframes from NRG tech dropped 387lbs off his car.

Jason

[J. Fast]

I really can't say for sure how much weight it's going to save. That number from Nelson is absolute bullshit though and I'd say it to his face. I weighed everything. The front subframe only weighs 45 lbs and the control arms and shocks weigh 50/ The rear is roughly the same... The arms in the rear weigh 100lbs tho. The subframes and arms combined dont weigh more than 250lbs so how did he majically remove more than what was there? I'd love to hear how he did it... really! I'd laugh my ass off and bust out my scale!

[FeaRpb]

Sign up Coop, Jason, and Dave!

[anyonebutme]

Budget is tapped this year...

[JasonY]

Those were the numbers from NRG tech, not Nelson.

http://forums.evolutionm.net/5573881-post25.html

Jason

[J. Fast]

Did a 200lb man get out of the car when they weighed it the scond time? I could see 120. Looks like I'll have to bust out my scale. For sure the front subframe weighs 45 lbs. That approaching 400lbs of savings number is absolutely over the top. Last time Erron came by my garage when I was pulling the subframe he asked me about building it and what I thought I could shave on weight. He mentioned cutting like 300lbs. I looked and him and said "you can't be serious? How much do you think the front and rear weigh?" He said atleast 100lbs in the front. I said "no fuckin way" and grabbed my scale and hopped on it holding the entire front subframe assembly. It weighed 45lbs. With control arms and all the other jazz mounted to it was still less than 80 lbs.

So if Nelson's using a stock LCA and the front weighs even 20 lbs less, that's only 25 lbs in savings. I'm surprised no one ever checked that number. I bet he swapped his CF doors and a bunch of other shit before and after, or weighed the car with someone in it and then without them.

The front and rear assembly's just don't weigh 450lbs. They weigh just over half of that. Those numbers are wrong, don't believe them. Raukuny is going to weigh his rear subframe that he's rebuilding, and I'm going to take mine to the scale at Bandimere to confirm, and then start asking questions...

[J. Fast]

It's absoultely ludacris to think that my racecar could potentially weigh less than 1000lbs with a full suspension, subframes, cage, seats, brakes, panels, and glass. That would mean it would weigh no more than 1800lbs with the motor and CF driveshaft. You saw the weight. it was like 1385 lbs with the stock subframes, brakes, suspension, cage, panels and etc...

[anyonebutme]

I think they are also counting the front subframe connectors, front crossbrace/motor mount brace, rear trailing arms, and possibly some other stuff that NRG built at that time.