** Evosport CLK63 Black Series Project **
Wow, I'm impressed. It turned out even better than I was expecting. I wanted a factory, OEM look, and you guys delivered.
Jim
I have several questions on the chrome moly roll bar. What is the diameter and wall thickness on the tubing? Secondly, are the mounting points to the floor, frame rails or seat belt pick up points.
Although my car will see light track use, some clubs scrutinize safety equipment with very little flexibility and I don't want to have them drill a leather wrapped bar.
Your images really show off the quality and attention to detail that you have put into your modifications. Very impressive!
It'll be interesting to learn how all of this work has improved the perfromance of the car.
JDB
The Best of Mercedes & AMG
It would drop the weight by 2/3.
I'm no structural engineer, but wouldn't a roll bar made out of aluminum have to be at least 40% larger in diameter, depending an gauge/wall thickness, to offer the same tensile strength as chromoly steel? If so wouldn't that make it large and obstrusive in the cockpit, especially in a car with a full cage? How much weight savings are we talking about, 10%, 50%??? I have been around quite a few heavily modded street cars and race cars and have not seen many (any in my case) aluminum roll bars, then again, I really have not paid that much attention. If aluminum is indeed a viable material why is it not being used more for cages? Or is it??? I am talking about real cages, designed for safety, not just some bolt in piece of jewelry here.
Can anyone inform me/us on this topic?
Thanks
Last edited by jrcart; Feb 1, 2008 at 07:36 PM.
CDS = Cold Drawn, Seamless
ERW = Electron Resistance Welded
DOM = Drawn Over Mandrel
Some links for your reading pleasure

http://www.keytosteel.com/default.as...kArticle&NM=62
http://www.keytosteel.com/default.aspx?ID=Articles
Last edited by LZH; Feb 1, 2008 at 06:48 PM.
It would drop the weight by 2/3.
I'm no structural engineer, but wouldn't a roll bar made out of aluminum have to be at least 40% larger in diameter, depending an gauge/wall thickness, to offer the same tensile strength as chromoly steel? If so wouldn't that make it large and obstrusive in the cockpit, especially in a car with a full cage? How much weight savings are we talking about, 10%, 50%??? I have been around quite a few heavily modded street cars and race cars and have not seen many (any in my case) aluminum roll bars, then again, I really have not paid that much attention. If aluminum is indeed a viable material why is it not being used more for cages? Or is it??? I am talking about real cages, designed for safety, not just some bolt in piece of jewelry here.
Can anyone inform me/us on this topic?
Thanks
As far as your credentials go, I'm not impressed. Show me a profesional license and I might be impressed. As for the name dropping, I can flip open my cell phone and give you the personal phone numbers of some "real" big name drivers. I have raced (not tracked days, actually raced) at every major circuit in North America, Daytona, Laguna, Road America, Mid Ohio, Brainerd, Heartland Park, PIR, LVMS, Road Atlanta, Watkins Glen, etc., etc., etc. I have also lapped the road course at Daytona in multiple Trans Am cars and SCCA sports cars, driven Nascar Cup cars on ovals and road courses, spent an afternoon in a Corvette C5R, and lapped the Chicago Speedway (not Chicagoland) in a 1997 Dale Coyne Racing Indy/CART (whatever the hell it was called then) car. I still hold an acctive pro liscence for the AMA Superbike series, which I competed in for 2.5 seasons. As an ametuer mototcycle racer in 1997 I shattered and still hold the CCS record for most points and most wins in all 4 classes at the national level as well as the 4 individual US regions I competed in.
I'll be out in Sunny California to do a shakedown run of my BS the last week of February, let me know if you want to join me for an afternoon at The Streets. Try to bring a streetable GT3 if you know anyone that has one. I would be interested to put this debate to rest with a real world, head to head race or we can just pull out the stop watches. I am not affraid to put my money where my mouth is. If that does not work I will be running the road course at LVMS about a week later, after the Nascar teams pull out of the infield. My friend will be out there with his GT3 and Carrera GT.
jrcart, Sweeeeet project way to have some ***** and go for it.!!! keep us posted!
Last edited by BMWEATR; Feb 1, 2008 at 08:46 PM.
Finally, I am not very familar with evosport. What little I do know about them is that I thought they were BMW tuners. Do they engineer and manufacture there own stuff, or do they just resell Kleeman, Brabus and Renn stuff?




























