Autocross - ZR-1 Net Registry Forums

jrtoffroad · 04-16-2012

Here's a quick update for 2012:

Didn't have a chance to work on the car this winter (too busy building an ultra-4 racer & prepping for KOH). So, with the same configuration as last year I've now raced the Z in 3 Auto-x's this year. One of which was a 2 day event put on by the local corvette club where I got 28 runs!

The car has been doing great. I did find a little slop in the d-side lower ball joint, so the car is down right now while I replace all 4 just to be safe. Figured this is as good of time as any to throw some poly bushings in the suspension. Hopefully I can get it all done in for this weekends race! Glad I'm doing it though, some of the stock bushings are in pretty rough shape. Very excited to see if there's a noticeable change in the feel of the car.

After I get the bushings in and the ride height tweaked (plan to bring the rear down just a touch) I'll need to have the alignment checked. I did not go with the offset lower bushings. I've been pretty happy with my settings from last year and plan to stick with those for now (~-2deg front / ~-1.25deg rear, no toe front & 1/8" in rear). I don't think my street tire budget can stand any more camber, and doubt I would gain much at the track.

I've still got a little life left on the NT-01's. They don't seem to stick quite as well as they did last season (been through a lot of heat cycles now), but still are worlds better than street tires. Just for fun I ran my new NT-05 street tires at the last event to compare performance, and while they may be great street tires, my times really suffered. When the NT-01's finally cord I'll be ordering another set.

On the brakes I've been switching between my carbotech (12 front 10 rear) and hawk HPS brake pads. The carbotechs are amazing and stop MUCH better when hot, but hard to live with on the street. Unreal amount of dust. The hawks are OK and much nicer for daily driving. I find for short slower Auto-x courses the Hawks do just fine, it's really only the high speed stuff where the carbotechs make a difference. For this weekend I'll be back on the Hawk's.

Anyways, still need to shoot some more video, but the Z continues to be very competitive, pretty consistently winning BSP and usually in the top few for FTD.

04-16-2012	#10
jrtoffroad Join Date: Sep 2010 Location: Colorado Springs, CO Posts: 75	Re: Autocross Here's a quick update for 2012: Didn't have a chance to work on the car this winter (too busy building an ultra-4 racer & prepping for KOH). So, with the same configuration as last year I've now raced the Z in 3 Auto-x's this year. One of which was a 2 day event put on by the local corvette club where I got 28 runs! The car has been doing great. I did find a little slop in the d-side lower ball joint, so the car is down right now while I replace all 4 just to be safe. Figured this is as good of time as any to throw some poly bushings in the suspension. Hopefully I can get it all done in for this weekends race! Glad I'm doing it though, some of the stock bushings are in pretty rough shape. Very excited to see if there's a noticeable change in the feel of the car. After I get the bushings in and the ride height tweaked (plan to bring the rear down just a touch) I'll need to have the alignment checked. I did not go with the offset lower bushings. I've been pretty happy with my settings from last year and plan to stick with those for now (~-2deg front / ~-1.25deg rear, no toe front & 1/8" in rear). I don't think my street tire budget can stand any more camber, and doubt I would gain much at the track. I've still got a little life left on the NT-01's. They don't seem to stick quite as well as they did last season (been through a lot of heat cycles now), but still are worlds better than street tires. Just for fun I ran my new NT-05 street tires at the last event to compare performance, and while they may be great street tires, my times really suffered. When the NT-01's finally cord I'll be ordering another set. On the brakes I've been switching between my carbotech (12 front 10 rear) and hawk HPS brake pads. The carbotechs are amazing and stop MUCH better when hot, but hard to live with on the street. Unreal amount of dust. The hawks are OK and much nicer for daily driving. I find for short slower Auto-x courses the Hawks do just fine, it's really only the high speed stuff where the carbotechs make a difference. For this weekend I'll be back on the Hawk's. Anyways, still need to shoot some more video, but the Z continues to be very competitive, pretty consistently winning BSP and usually in the top few for FTD.