I asked: Track it or sell it, you all said track it! Finally ready to run!

[RussMcB]

Originally Posted by cbaclawski

<snip> ... and the app gives me pretty decent data I can easily review between sessions.

If it's not asking too much, can you do a little write up of your track day afterwards, including looking at your data in between sessions, what you see in it and how you use it to go faster? I would enjoy reading that and probably many others, here, too.

[gtcollins@maxnet.co.nz]

Originally Posted by cbaclawski

About a year ago I asked on this forum whether you guys thought I should sell my Z, or modify it for Track duty. You overwhelmingly recommended the Track route. I listened, and it's finally ready for the road course. (though I'm a little scared if I'm being honest)

What started as a 90 zr1, that had the Lingenfelter 368 package installed in 1997 at about 43k mi (~83k now) has had some significant work/refreshing done to it and is now ready to roll:

Ron Davis Radiator installed
3.73 rear end
Racetech Seats and Harnesses
Upgraded brakes and fluids
Secondary intake system removed
Custom Mark Haibeck 368 tune
New 160tw Track tires


In addition to the work my semi-local race shop did (big dog motorsports - rock hill, sc - highly recommended, though more of an import shop than a vette specialist) the car actually was shipped up to Marc Haibeck's shop near Chicago for much of the ZR! specific stuff and a thorough once over.

I'm going to run it next weekend and can't wait to see what it can do, or more accurately, what my limited talent can do with it...


pics:

Are your seats made in New Zealand

Sent from my SM-G960F using ZR-1 Net Registry mobile app

[cbaclawski]

Not sure, They are racetech, and they sure did take a long time to get here, so it's a distinct possibility...

[henryr]

what brake mods did you do ?

[cbaclawski]

Originally Posted by henryr

what brake mods did you do ?

Stainiless lines, new rotors, and track pads... I believe the calipers are still stock, but it stops with more authority than the tires have grip...

[gtcollins@maxnet.co.nz]

Originally Posted by cbaclawski

Not sure, They are racetech, and they sure did take a long time to get here, so it's a distinct possibility...

Race tech factory is in Lower Hutt where I live

Sent from my SM-G960F using ZR-1 Net Registry mobile app

[onethumb]

Originally Posted by cbaclawski

Stainiless lines, new rotors, and track pads... I believe the calipers are still stock, but it stops with more authority than the tires have grip...

Just curious---which pads specifically did you go with? I'm a fan of Carbotech, but still waffling between X10 and X12 in front, and X8 or X10 in the rear.

[cbaclawski]

Originally Posted by onethumb

Just curious---which pads specifically did you go with? I'm a fan of Carbotech, but still waffling between X10 and X12 in front, and X8 or X10 in the rear.

Hawk HP+. Not true 100% race pads, but since I've been running them on my other track cars (e46 330i, mazda rx-8) I've been very impressed with their stopping power, never experienced any fade, and don't destroy my rotors if I decide to drive them on the street without getting them up to temp.


The Z will likely be faster (and definitely heavier) than my others so I'm curious how well they'll hold up on track in this application. I'll post how they do...

[onethumb]

Originally Posted by cbaclawski

Hawk HP+. Not true 100% race pads, but since I've been running them on my other track cars (e46 330i, mazda rx-8) I've been very impressed with their stopping power, never experienced any fade, and don't destroy my rotors if I decide to drive them on the street without getting them up to temp.


The Z will likely be faster (and definitely heavier) than my others so I'm curious how well they'll hold up on track in this application. I'll post how they do...

I'll be curious to find out---Hawk pads didn't last long on my Giulia, and it is comparable in HP and weight. To be fair, it's a brake-by-wire system, so there's little feedback to the driver if things get hot.

[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