C5Z Track Toy

Post Your Delco Powered Ride Here
User avatar
Posts: 427
Joined: Fri Feb 02, 2018 3:13 pm

C5Z Track Toy

Postby NSFW » Thu Feb 13, 2020 7:43 pm

Power mods:

Haltech Killer Bee air intake
LS2 throttle body (tried to use a Nick Williams 102, failed so far)
FAST LSXR 102 intake manifold
Heads were ported and milled by a previous owner, 11:1 compression ratio
232/234 @ 112+4, .600/.600 camshaft
Kooks 2" headers, 3" midpipe, 3" mufflers (mufflers are heavy, drone is terrible)

Misc motor mods:

DeWitt radiator with engine oil cooler (oil still hits 245F / 118C on track)
Melling high-pressure oil pump
LS7 lifters and pushrods
BTR 660 springs
RPC Billet Carbon Twin clutch, lightened by Tony Mamo (32 pounds if I remember correctly)
Cheap ebay catch-can


StopTech ST60/ST40 brake kit
CarboTech 1521 pads for (street, because I liked them in my Subaru)
CarboTech XP12/XP8 pads (track days, since I like their street pads)
Lowered on stock ride-height adjusters
C6 reproduction wheels 18x8.5 and 19x10 (street)
TSW Nurburgring wheels, 18x10.5 front and rear (track)
Cobra Imola seats
Brey-Krause harness bar
Sparco harnesses (track)
C6 3-point belts (street - no lap belt retractor = more room for seats)
Carpeted wood divider to separate the trunk from the cabin (makes the drone tolerable)

In boxes:

ACP heat-extractor hood (hoping to get the oil down around 220F / 105C)
Bare aluminum Holley valve covers (will have them painted along with the hood)
4EyeC5 headlight kit (low-rise popups, projectors, LEDs)

[Pictures to come - my internet connection is not cooperating right now.]
Please don't PM me with questions about tuning or flashing - start a thread instead. Thanks!

User avatar
Posts: 427
Joined: Fri Feb 02, 2018 3:13 pm

Re: C5Z Track Toy

Postby NSFW » Thu Feb 13, 2020 8:27 pm


I started racing a Ford Escort in the ChampCar budget endurance series with some friends back in 2009, and loved it. It's a bit like LeMons - long races with cheap cars, but less circus and more race. Later we switched to a 96 Mustang in the Lucky Dog series (same format, slightly nicer cars). Every year I thought we'd get more track time, every year there was one obstacle or another, so I started looking for a car of my own... It had to be street legal so I could easily drive to the track and easily drive it so a shop if it needs work (as opposed to coordinating a trailer / tow vehicle / friends' schedules). And I wanted rear wheel drive, and since the Mustang's power was so much fun I wanted to go up a notch from there. And it was supposed to be black, white, or silver, but in late 2017 there was a blue Corvette for sale that I couldn't pass up.

Not sure how 2018 passed so quickly (this didn't help) but I got my first 4 track days in the summer of 2019 and I'm looking forward to a bunch more next year.


In the Subaru world there's a company called Tactrix with a product called OpenPort that costs very little and lets you read and write the ECU. It's closed-source, but inexpensive, and they have a synergistic relationship with a community of people that created open source tools for ROM editing, data logging, and reverse engineering of the ECUs. That was actually the deciding factor in me buying a Subaru when I was looking for daily driver back in 2006. Initially I just wanted to use those tools learn how engines worked... that led to logging, and then tuning, and then reverse engineering, and then finding tools to compile code for the chip in the ECU, and writing a little utility to apply patches of that compiled code.

So when I bought a car that's a couple years older and 10x more popular, I was a little surprised to find that the open source community was just getting started. PeteS / Loud160 introduced me to Antus and Tazzi. I've been doing Windows development for a long time, but didn't know where to start with PCM stuff. Antus had already solved the hard problems but needed help with the Windows-application side of things. PCM Hammer started coming together.

Story continues:

Between not having a dyno and not wanting to miss a second summer of track days, I paid a local guy to tune my car. It made great power, but it barely idled and would stall at every third stop light. Fortunately by that point PCM Hammer had full support for the P01, and both cmaje and LRT had XDFs for the operating system on my car. Idle isn't perfect yet, but the car doesn't die anymore.

With the 2019 upgrades (heads, cam, intake tract, exhaust) the car made 475whp on a local shop's DynoJet. I think that might be generous, but I won't argue with it.

So far I've only had it on track at The Ridge Motorsports Park in Shelton, Washington, USA. On the last track day of 2019, the best lap time I saw on the timer was 2:03, but that was with me lifting on the straights to stay avoid passing/outrunning my friend in the aforementioned Mustang. I suspect I was doing around 2:00 on my own, and another 3-5 seconds faster still for a few laps chasing an E46 M3 (a little bit outside my comfort zone, but I learned a lot in those laps).

Hopefully in 2020 I'll take it to Portland International Raceway where my best time in the Mustang was a high 1:32. And maybe to Oregon Raceway Park where I'll demote myself to the novice class for a while, since I've never been there before.
Please don't PM me with questions about tuning or flashing - start a thread instead. Thanks!

User avatar
Posts: 427
Joined: Fri Feb 02, 2018 3:13 pm

Re: C5Z Track Toy

Postby NSFW » Thu Feb 13, 2020 8:28 pm

This space reserved, just in case.
Please don't PM me with questions about tuning or flashing - start a thread instead. Thanks!

Return to Members Rides

Who is online

Users browsing this forum: Majestic-12 [Bot] and 5 guests