Last week we spent two days setting up our Time Attack car wit the JRZ suspension. A lot of things were learned and changed. Spring rates, sway bars, shock settings, tire pressures, camber, toe, ect. We installed linear potentiometers on each shock and data log what each wheel does on the race track. With the engineering help of Bryan from JRZ and Mark Daddio's driving and input the car got consistantly faster each time out. In the end we were faster than ever before and the car is still not balanced perfectly, meaning we have more room for improvement!

We're spending the time and research to bring our customers not only the best parts but the knowledge and setup that goes behind it. To give you an idea, we were running about 1 second off a SCCA GT1 qualifying time. This was on low boost and Mark was driving in 'test mode'. To give you an idea a GT1 car runs full slicks (not DOT), tube frame race chassis, 2800lbs with drive, & 600+ hp. see here

http://www.flickr.com/photos/jbonvouloir/325372276/

This is the type of car that we're trying to match or beat, and if we can then we have one hell of fast car on our hands.

When you purchase products from us you also get all of our R&D that we do. We'll help you setup your car or give you specs & instructions on how to make your car run with the best

I know many of you have inquired about the JRZ suspensions and they will have a camber plate solution very shortly. In the meantime we'll be able to better match spring rates and car setup from our R&D.

Enjoy!

 

Lookin' great! A step up from ohlins? .... who would have thunk it!

As always, AMS rocking the house!

 

Looking good!. So when is a package going to be developed for a more every-day Evo, and who will be developing it?

l8r)

 

I'm glad you asked. The answer is soon and JRZ in cooperation with AMS. We are dialing in the setup for the track only EVOs, and from what we learn there we will be able to make a road going setup. The street tire follows the race tire. There will be an EVO kit provided by AMS in the coming weeks. Prototypes are being manufactured as I type.

Also in the works is a new street line of JRZ shocks that share much of our racing R&D with pricing and valving for the street. Expect prices to be highly competitive with KW and a package that works like it should. More updates as the product line reaches release.

Best,

Bryan Hise
Race Car Engineering, Product Development
JRZ USA Suspension Engineering
bryan@jrzusa.com
410-799-7798

 

Awesome work guys! I never cease to be impressed by the distance you guys go in every field. It really makes me smile to see you guys concentrating more and more on what's really important with the Evo

 

In the close up picture I noticed the spring is made by Eibach. Why was that spring chosen? Isn't there a better spring that could be used?

 

Just out of curiosity, why do you say?

Mark

 

Eibach springs work very well. We have a spring dyno here and I've rated all the major brands numerous times. There is not much difference to be perfectly honest. Any that do exist wont matter much until you are ready to squeeze the last few percent of the cars performance out. That's a process that takes the effort only pro teams (IRL, Grand-AM DP/GT, NASCAR, etc) really need to do.


Bryan Hise
Race Car Engineering, Product Development
JRZ USA Suspension Engineering
bryan@jrzusa.com
410-799-7798

 

Excellent work, guys! I'm looking forward to putting these on my car!

 

I was just curious. I am comparing cars that only swap out with some lowering springs and how they all react a little different. I figured that would have some effect on this suspension as well. Although I have used Eibach springs on previous cars and had no issues with them, I only figured this type of setup would have their own springs as well.
On a side note I can't wait to see a street/track setup with these. I would love to lose my Megan C/O's.

 

I have had no issues using the eibach's, and their use is really only a matter of convenience in obtaining them quickly in many different rates. Most manufacturers of straight rate race springs are pretty good. If I was dealing with an extremely stiff chassis tube frame car, I might get a little more particular on the exacting quality on the springs. From what I have seen, the eibachs are within a half a percent or so of advertised rate.

 

What's the blue tube/link thingy to the left of the strut in the 5th pic?

 

I was wondering also. I had a feeling they were the sensor that was used for the datalogging.

 

I think his perception of Eibach is due to their street coils, meaning the lowering springs sold by the vendors on here.

Eibach has some of the best manufactoring practices in the world, and many coil-over companies actually have Eibach make the springs for their applications. That, plus that fact that almost every form of motorsports has teams that use Eibach springs speaks for itself.

Those Eibach springs are not "Pro-Kit" pieces, they are purpose built coils for specific applications. As far as springs go, as long as they are durable, perform linearly in the linear range, and provide correct spring rates based on the advertised amount, it really doesnt matter whos name is on them.

 

the blue thing is a mini-shock that we're developing for an AMS exclusive gas Time Attack RC car. 10 hp, 8lbs, 0-100 in 2 seconds.....

Or it's a linear potentiometer

We use it so Bryan can spend hours behind a laptop screen playing 'chassis engineer' We have it calibrated so we can actually see vertical wheel movement in .010" of an inch at a high sampling rate (200 times per second!)