[tnova]

Count me in on the follow-up on your track day.

I've been prepping my '91 for track days and autocross but keeping it streetable. (For a dedicated track car I have an older Porsche - former PCA Club racer that I've run in TTs and next year in competition). As time goes on I'll likely run the ZR-1 more than the Porsche.

Engine is stock on the bottom with GVD top end porting, Watson headers, RAM dual disc clutch and AL flywheel. 4.10 rear gear also.

The brakes are Wilwood 6-piston calipers with hats and rotors on the front and stock calipers with Wilwood hats and rotors on the rear. Those made a tremendous difference however adjustability, even with a bias valve, wasn't enough. I've recently installed a larger master cylinder ('98-'02 Camaro) since the '90-'91 master cylinder bores are the smallest of the C4s and with the Wilwood pistons more fluid volume was needed.

I absolutely agree with you on brake pads; the right pad can make all the difference in the world. Right now I'm running Wilwood pads that came with the kit, but have had best track experience brake tuning with Hawk pads. The bad part is the Hawk Blues can destroy brake piston rubber components if not cleaned after every event - not something I want on a street car.

Other track mods include urethane bushings and the typical rear suspension changes popularly written about as well as BB C-beam plates

I've also done a throttle pedal mod to improve heel-toe that I'll test out this spring. It changes the pedal pivot point. If it works, I'll publish on the forum or submit for the HTB.

Finally in the process of relocating the battery to the rear passenger smuggler's box combining the Haibeck kit with a SPA 6-pole cutoff switch that keeps factory wiring to the engine area mostly intact. The SPA 6-pole switch prevents engine run-on but protects the alternator though a ground. I'll submit that to HTB soon.

Tnova