C5Z06 alignment
05-03-2012, 08:46 AM
#1
Melting Slicks
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Member Since: Jan 2009
Location: Easley/Anderson South Carolina
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C5Z06 alignment
I posted a thread up over on the C5Z06 forum but it was recomended that I come here. After sometime, I finally have posted here. What I am looking for is a good alignment that I can feel comfortable about.
I will try to describe my concern below, please bare with me as I may not us the correct terms. I also dont track my car on tracks, but do spirited back roads, kinda like mountain runs? I also do a fair amount of highway driving too if that matters.
Currently the car doesnt "feel" right when doing sharpish turns, it feels as if it is getting "squirrelly" just after the turn in, and I have to make small correction to keep my line.
I am willing to listen to any suggestions to get my car handling better, but I am not wanting to spend $1,000's on coil overs and such.
My current suspension mods are; Pfadt polly mounts full kit. Bilstein shocks for lowered car (not the custom valved ones offered on here) Nitto Invo's (275/35R18 & 325/30R19) I plan to install Polly engine and trans mounts if that makes any difference at all. Other that that the suspension is stock 2002 C5 Z06.
I recently installed the pdaft poly mounts and had my car aligned. I will list the specs from the print out below.
What I am looking for is advise on changes, I have to take the car back because the steering wheel is off center to the left alot. I am looking for a good alignment that wont cause significant tire wear, but have good handling.
Anything seem too off? The guy doing the alignment stated that the Caster was a non tire wearing spec and that with the higher value would cause the car to be slightly harder to turn, giving it better high speed stability. Is that incorrect?
Front Left Spec range
Camber -0.6 -1.2 -0.2
Caster 8.4 6.4 7.4
Toe 0.03 -0.06 0.14
Front Right
Camber -0.6 -1.2 -0.2
Caster 8.2 6.4 7.4
Toe 0.04 -0.06 0.14
Front Spec Range
Cross Camber -0.0 -0.5 0.5
Cross Caster 0.2 -0.5 0.5
Total Toe 0.07 -0.12 0.28
Rear Left Spec Range
Camber -0.7 -1.2 -0.2
Toe 0.07 -0.11 0.09
Rear Right Spec Range
Camber -0.9 -1.2 -0.2
Toe 0.09 -0.11 0.09
Rear Spec Range
Cross Camber 0.2 -0.5 0.5
Total Toe 0.16 -0.22 0.18
Thrust Angle -0.01 -0.10 0.10
I will try to describe my concern below, please bare with me as I may not us the correct terms. I also dont track my car on tracks, but do spirited back roads, kinda like mountain runs? I also do a fair amount of highway driving too if that matters.
Currently the car doesnt "feel" right when doing sharpish turns, it feels as if it is getting "squirrelly" just after the turn in, and I have to make small correction to keep my line.
I am willing to listen to any suggestions to get my car handling better, but I am not wanting to spend $1,000's on coil overs and such.
My current suspension mods are; Pfadt polly mounts full kit. Bilstein shocks for lowered car (not the custom valved ones offered on here) Nitto Invo's (275/35R18 & 325/30R19) I plan to install Polly engine and trans mounts if that makes any difference at all. Other that that the suspension is stock 2002 C5 Z06.
I recently installed the pdaft poly mounts and had my car aligned. I will list the specs from the print out below.
What I am looking for is advise on changes, I have to take the car back because the steering wheel is off center to the left alot. I am looking for a good alignment that wont cause significant tire wear, but have good handling.
Anything seem too off? The guy doing the alignment stated that the Caster was a non tire wearing spec and that with the higher value would cause the car to be slightly harder to turn, giving it better high speed stability. Is that incorrect?
Front Left Spec range
Camber -0.6 -1.2 -0.2
Caster 8.4 6.4 7.4
Toe 0.03 -0.06 0.14
Front Right
Camber -0.6 -1.2 -0.2
Caster 8.2 6.4 7.4
Toe 0.04 -0.06 0.14
Front Spec Range
Cross Camber -0.0 -0.5 0.5
Cross Caster 0.2 -0.5 0.5
Total Toe 0.07 -0.12 0.28
Rear Left Spec Range
Camber -0.7 -1.2 -0.2
Toe 0.07 -0.11 0.09
Rear Right Spec Range
Camber -0.9 -1.2 -0.2
Toe 0.09 -0.11 0.09
Rear Spec Range
Cross Camber 0.2 -0.5 0.5
Total Toe 0.16 -0.22 0.18
Thrust Angle -0.01 -0.10 0.10
05-03-2012, 10:06 AM
#2
Melting Slicks
That's a lot of caster. I would go with more camber in front (maybe -1.3 or so), back off the caster to 7.5, and then slightly toe in the rear. That should be a solid performance alignment. If you still have issues with the rear stepping out after that, it won't be from the alignment. 
BTW, if you installed poly bushings for the sway bars that is probably your problem. They can bind up and make the sway bars super stiff causing instability in turns. Lube up the inside of the bushings and use shims to take some of the clamping force off the bushings.
BTW, if you installed poly bushings for the sway bars that is probably your problem. They can bind up and make the sway bars super stiff causing instability in turns. Lube up the inside of the bushings and use shims to take some of the clamping force off the bushings.
05-03-2012, 10:40 AM
#5
Drifting
I clean and re-lube mine beginning of each season. Gets all grimy in there.
05-03-2012, 11:49 AM
#6
Melting Slicks
Thread Starter
Member Since: Jan 2009
Location: Easley/Anderson South Carolina
Posts: 2,127
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That's a lot of caster. I would go with more camber in front (maybe -1.3 or so), back off the caster to 7.5, and then slightly toe in the rear. That should be a solid performance alignment. If you still have issues with the rear stepping out after that, it won't be from the alignment.
BTW, if you installed poly bushings for the sway bars that is probably your problem. They can bind up and make the sway bars super stiff causing instability in turns. Lube up the inside of the bushings and use shims to take some of the clamping force off the bushings.
BTW, if you installed poly bushings for the sway bars that is probably your problem. They can bind up and make the sway bars super stiff causing instability in turns. Lube up the inside of the bushings and use shims to take some of the clamping force off the bushings.
