View Single Post
Old 06-07-2013, 05:38 PM   #1
VIR Specialist

JusticePete's Avatar
Drives: Camaro Justice
Join Date: Jun 2007
Location: Virginia
Posts: 20,242
Bull's F16 Updated

Bull has built an awesome 5th Gen with a bit of power.

He has been running a Pedders Justice Package with 305/30/19s all round. Last week we decided to upgrade to the new rear Z style bar, increase the spring rates to 12kg and add camber plates.

The first step is mission critical. It is the classic example of measure twice. Cut once.

Finding the center line for the camber plates requires only a string and ruler. Once you have the string evenly dividing the strut tower holes on both sides the rest is cake.

We setup Bull's Camaro for maximum adjustment. During the initial installation we relived the upper slots in his Suppercar Coilovers to increase the available negative camber. With his camber plates he won't be using all the available camber adjustment unless we stagger his setup for an oval track. Since Bull drives as hard as his call sign implies we maxed out everything.

We can get to -4.7. The two small holes allow access to the camber plate screws at -4.3 using the slots in the clevis or -2.6 with no camber at the clevis.

Bull Got Camber!

We roughed in the alignment and went to work on corner weights. Bull's Camaro has extra engine stuff including junk in the trunk. We are within 6 pounds or perfection on a 4116 pound automobile without moving weight around the vehicle. The total ride height differences were under 9mm divided between four wheels.

We are within 6 pounds or perfection on a 4116 pound automobile without moving weight around the vehicle. The total ride height differences were under 9mm divided between four wheels. As this is a custom Camaro, the exact ride heights are not relevant to other Camaros. Running 660mm ride heights all round is relevant to all 5th Gen Camaro owners. When all is said and done there was less than 9mm total variation in ride heights to get this balanced.

We did not align the car with just the driver. Bull uses his Camaro as a street car and frequently has a passenger. Be ware of this Camaro when his daughter is driving. From what I can gather she is her father's daughter.

Let's talk alignment numbers.

We maxed out Bull's Caster using Pedders Full Alignment Bolt Kit. Caster is good. SAI is better for steering geometry and feel. We added a 1 point to SAI under all alignment positions. As I type this I just noticed that the Right side Street and Track numbers are wrong. In full track mode we are 14.3 left and 13.9 right. In street mode we are 12.9 left and 12.8 right. The improved SAI SAI is a benefit of installing Pedders Dual Bearing Camber Plates.

For street driving we are TOE in 0.15 on both side. We would like to be closer to 0.00 Toe, but the toe moves out aggressively as we add negative camber. For Bull's use we felt that -1.00 Camber and Toe IN 0.15 was a good split of handling and tire wear for daily driving.

Pedders Dual Bearing Camber Plates are indexed. That is critically important if you want to change camber setting track side and drive home with a tire friendly alignment. Loosen the set screws in the camber plates and you get a track alignment. -2.6 degrees of camber with 0.80 toe OUT. Bull's Camaro turns in and turns in now.

Bull is running Pedders new Z bar and has an enormous amount of power at the rear wheels. We settled in with a comfortable Toe IN of 0.10 per wheel in the rear. Rear camber is a compromise. It would be nice to run more rear camber for high speed mid turn. If we increase the rear camber to -1.3 Bull will burn through rear tires on the street as though they were disposable. Putting all that power down requires a stable IRS. We used EP1201HD bushing for maximum control.

When you look closely at the images and data, it is clear that Pedders delivers a clear upgrade in the control surface areas. Our numbers are conservative. We have ridges in our EP1201 series of bushes so we only calculated the ridged areas - even though they compress when installed.

How does Bull's Camaro drive? I am sure he'll stop by and let you know.

Last edited by JusticePete; 06-07-2013 at 11:12 PM.
JusticePete is offline   Reply With Quote