New suspension results :-)
Thread Starter
Melting Slicks
Joined: Dec 1999
Posts: 2,116
Likes: 156
From: Mid West
Cruise-In III Veteran
I justed wanted to comment on the results from the track day. The car ran great and was more predictable. In addition to the front geometry changes I made, I also added some additional toe-in to the rear suspension and changed tires to Michilen Pilot PS2's. I had a blast at Putnam Park, and got six 20 minute sessions in 
. The bump steer blocks did perhaps hurt my achermann angle, because the car does understeer slightly on the sharp corners. But I found it works out fairly well, and the understeer can be corrected with a little throttle coming out of the apex.
. The bump steer blocks did perhaps hurt my achermann angle, because the car does understeer slightly on the sharp corners. But I found it works out fairly well, and the understeer can be corrected with a little throttle coming out of the apex.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Thanks for the report. You'll likely be wearing a big fat smile for a few days after all that track time. I hear Putnam is really nice.
As you've probably become aware, it sounds like a little trail-braking might be in order to get the car to rotate better at turn-in on those tight corners with the new front geometry. Or, since that technique can tend to require damper adjustments to keep from upsetting the car on corner entry, you could try a little static toe-out to see if that improves things, although you'd definitely want to eliminate that for the ride home.
Keep us posted with your progress. Good stuff!
As you've probably become aware, it sounds like a little trail-braking might be in order to get the car to rotate better at turn-in on those tight corners with the new front geometry. Or, since that technique can tend to require damper adjustments to keep from upsetting the car on corner entry, you could try a little static toe-out to see if that improves things, although you'd definitely want to eliminate that for the ride home.
Keep us posted with your progress. Good stuff!
Thread Starter
Melting Slicks
Joined: Dec 1999
Posts: 2,116
Likes: 156
From: Mid West
Cruise-In III Veteran
Skunkworks,
The only turn it was really noticable was a tight fairly highspeed turn (turn 8, I believe). The other corners seamed pretty good. I'm running a little extra toe-in at the moment in the front also (3/16" vs. the recommend 1/8"). I did this because the steering box is a little loose ... its my next project to improve. After that, I should be able to go to close to 0 or maybe 1/32" toe-in. The looseness in the box causes the steering wheel to vibrate without toe-in right now.
I'll see how that does in Oct. when I run at Putnam again. I'm going there with all the Z06's. That should be fun
. I have a feeling that I'm going to be just slightly off the pace going by the two Z06's that were there last week.
I was able to hold my own with alot of the newer cars (350Z, RX8, a couple of mid 90's M3's) in the novice class, but the 2007 Z06 just spanked all of us.
The only turn it was really noticable was a tight fairly highspeed turn (turn 8, I believe). The other corners seamed pretty good. I'm running a little extra toe-in at the moment in the front also (3/16" vs. the recommend 1/8"). I did this because the steering box is a little loose ... its my next project to improve. After that, I should be able to go to close to 0 or maybe 1/32" toe-in. The looseness in the box causes the steering wheel to vibrate without toe-in right now.
I'll see how that does in Oct. when I run at Putnam again. I'm going there with all the Z06's. That should be fun
. I have a feeling that I'm going to be just slightly off the pace going by the two Z06's that were there last week.I was able to hold my own with alot of the newer cars (350Z, RX8, a couple of mid 90's M3's) in the novice class, but the 2007 Z06 just spanked all of us.
Thread Starter
Melting Slicks
Joined: Dec 1999
Posts: 2,116
Likes: 156
From: Mid West
Cruise-In III Veteran
Actually the spring rate is pretty soft. I have the transverse VBP springs front and back. Front is set on next to softest setting and the rear is on the softest. I'm running Edlebrock's shocks too.
I was debating on increasing the spring rate before going back to Putnam Park.
I was debating on increasing the spring rate before going back to Putnam Park.
