How to keep up with c5 zo6's?

[dolf]

What would it take to make a 67 keep up with c5's on the road course? I am already going with the AME sub. Will properly set up leafs be able to do it? Or am i going to have to go with the LD 3 link? The car will have an ls1 and hopefully weight will be down to 3000 lbs. I am a big fan of bilsteins so they will be going in on all four corners. This car is my weekend racer first street car second. Tires will most likely be toyo r888 305 rear 265 front.

[hotrdblder]

with tuning leafs would keep up, however doing a rear susp would make if far easier to do,
sounds like you have the front taken care of, I have a new tq arm rear that I just got done testing, was designed by Katz and has the fewest compromises out there, in basic form its non adjustable, then we have a road race option for adjust ability on different tracks, it allows you to loosen the car up for slower tighter tracks, then allows you to tighten the rear up for tracks like mosport, mont tremblant, etc
https://static1.pt-content.com/images/pt/2008/08/IMG_1662-1.jpg
https://static1.pt-content.com/images/pt/2008/08/IMG_1657-1.jpg
https://static1.pt-content.com/images/pt/2008/08/200808040694-1.jpg
https://static1.pt-content.com/images/pt/2008/08/IMG_1674-1.jpg
lastly you get this very well designed tq arm susp(3 link), and you do not need to cut the car in half, front mount bolts between subframe legs,has a nhra approved drive shaft hoop,lower links use front spring pocket mounts,the rear upper shock cross member welds into place, as well as phb mount with 45º brace, and you can either weld your own axle brackets in place or buy a pre welded axle housing.Bilsteins come non adjustable in the basic package, with 6 way adjustable's being an option, we worked with the motorsports division engineer to get our valving where we wanted it.
also look into my front clip, as the front and rear were designed together as a package, not individual systems. The front also comes with bilstein aluminum coil overs.
call or email anytime
[email protected]

[dolf]

This bad azz! So how does it handle? Comparable to a c5?

[hotrdblder]

better then a c5, stock c5 z06 have .65 neg camber gain per inch, my chassis has .85 neg camber gain per inch of bump, also has 7 degrees of caster built in, and can go from 1.0 degree neg camber static to 3.0 degrees static with corrosponding spacer. rack was mounted properly, as well as tie rod length was matched with steering arm design to attain .009 bump (out) steer in 4 inches of travel.

[silver69camaro]

Dolf, your PM box is full and I cannot respond do your question...

C5 Z06's are an easy target. I'd shoot for M3s for speed and drivability. Honestly, it's mostly up to the driver. Slow in, hit the apex, fast out.

[68sixspeed]

comparing to any given car is very subjective- as Matt said, it has a lot to do with the driver-- and in the case of vettes tires. Run flats are rocks, change to any decent performance tire and these cars shed seconds off the lap times. (let along slicks) I kept a 08 m3 behind me most of the time at LRP even though he had a big hp advantage and a good driver just off 2 track days. My c5 non-z could out break him though and was lighter. Now after playing with a few c6z's... time to upgrade! If it's a rough track the independant rear cars have an advantage, if it's smooth and fast, a fixed axel will do fine and can actually weight transfer better with a 3 link or torque arm setup.

There are some real good products out there, or look at custom work too... Probell's 3 link 67 is very purpose built but flys... it is fast enough to qualify at the Busch car race at Lime Rock. https://www.pro-touring.com/forum/vbpicgallery.php?do=view&g=106 not bad for a 26mpg street car.

[dolf]

The reason i am putting c5z's as the benchmark is they are usually some of the fastest around my track.

[68sixspeed]

yep, they are quick... lets say same driver, both cars, I'd doubt if a leaf spring rear could be tuned in to run with it. Good f/r suspension, big brakes with track type pads, and an excess of hp will be needed-- remember the z's are about 300# lighter than a camaro too. Don't forget to do cooling ducts on the brakes too.

[Van B]

Buy my LS2 and you will be crushing C5 Zs, C6s and Vipers.

https://www.pro-touring.com/forum/showthread.php?t=46168

and a little video around Road America. Not my best laps, but the only ones where I did not screw something up.

http://www.youtube.com/user/LSTOO

[dolf]

Cooling ducts are in order and i will have manuel AP 6 pot fronts and ls1 rears (for now). My ls1 will be stock except for ATS headers and possibly a small cam. I want to make sure my driving is up to snuff before adding tfs 215's and ported fast 92. Car has ccw c14 wheels and i am looking to lighten it up more with some CF pieces from anvil auto. Inside will have 4pt with harnesses and sparco evo 2 and sparco 383 wheel. I am concentrating on making the thing as light as possible. Any ideas would be appreciated.

I would really like to hear more about this TQ arm, PHB setup from Jakes. Very appealing as is the front sub. I thought i was set on the AME but now this has me thinking.. Hmmmm

[hotrdblder]

the tq arm is a 3 link, but with a very heavy duty 3rd link, which controls pinion angle changes very well, also by how we designed it, it is 54 inches long, to really slow down rear geometry and make it stable in all conditions, the best part is you dont have to cut the car up, you get 3 link geometry, and its in the price range of the 4 bar systems out there.
the front tq arm mount is a barrel shapped delrin bushing that allows free articulation of the axle in bump,

[Van B]

Any pics underneath?