About to be proud new owner of 2013 ZR1 with a whopping 6,500 miles on it.
Going to make a track monster out of it but slowly over time - so staging upgrades and going to plot progress. Car will primarily be track TT, track days and little NASA/SCCA later on (SU/SP class). Will get some Street use but very limited

Been reading up here and there and will start with body/aero/suspension - then move on to phased engines upgrades. Please provide feedback/suggestions on my plan - as plans always get adjusted - and will adjust as needed here as well

Xpel film car - heck it's a 2013 right?
Forgeline race wheels 19x10.5 fr and 19x13 re. - Will run 305/345 A7 Hoosiers for track - some big DOT tires (non-run flat) off track
Sparco Ergo seats x2
PDAFT engine, tranny and sway bar pillow mounts
LG metal bushings all around
APR GT1000 rear wing with Tway bumper mount kit
LG long tube headers, X pipe with stock mufflers (for now) – high flow cats as well to keep street legal
LG long tube headers, X pipe with stock mufflers (for now) – high flow cats as well to keep street legal (for now as well)

LG or Penske or KW coilovers – undecided still – help me out here – leafs will be removed Fr/Rr — really like the KW with HLS for track/Street and getting in/out of trailer
TPS’s APR full flat splitter for ZR1- mounts right under stock splitter
TPS’s APR rear diffuser for coilover system - aka all the way to diff
8 point rollcage - NASA/SCCA/NHRA approved
AP racing brake f/r 372/340 kits w/ AP9668/AP9449 calipers
Tow hooks, kill switch, fire extinguisher etc - all misc safety items
Easy engine stuff - 160 deg Thermo - cold air intake improvements
Carbon hood vent for poly cover (suggestions here)

Engine phase one (some time after all above is complete)

Convert full time to E85
85 lbs injectors (for now)
Top pulley to 2.6
Balancer/lower pulley to 8.34 (idler and belt size needed?)
Air brick upgrade
Heat exchanger upgrade with dual fans (AFCO or similar)
Meth/water injection - snow kit
Tune only - 125 rwhp over stock?
Not wanting to go into any internals of engine on first pass

Engine phase two — long time from now cause now poor AF
Can see custom built “spare engine” in 1-2 years (based on how long above will last)

going 19” inch for a couple of reasons - brake clearance - keeping the stock ceramic brakes until rotors need replaced then 372mm front brakes vs. 355mm - car will get HP pushed way up later and Rear may get custom upgrade to 362mm rotors later as well.
2nd reason is other track car runs 19” and can flip tires (wheels different lug pattern) as needed between them.

A7 Hoosiers for track and proxes R888R Street - car will live 90%’on track. Both readily available in 19” there a couple other choices but agree a little more limited but have what I will use.

will look into the JRi coilovers

I don’t see any advantage going 18” vs 19” wheels - actually only negatives. Sidewalls on similar width race tires will be taller on 18” vs 19” (race A7 Hoosiers), 18” will limit front brake choices to 355mm or smaller rotors, changeable with used/new tires from my second car. Again car is going on the track not the drag strip - may do 1-2 quarter mile runs just to get a time.

aside from a larger DOT tire selection - what would be advantageous to go 18” over 19” wheels? In a full time track application......

Running the ACR 355 rears on other car with 19x13 wheels - so i could be making my own scrubs.....

anyone put the 355’s on 19x13’s in Z06/ZR1 rear end? Required offset/backspacing/tubbing required? Won’t be flaring fenders anytime soon.......

That flat splitter is going to mount directly under the stock ZR1 splitter that is tunneled - going to clear out all the “other” stuff there - reroute Brake duct inlets etc. a little sealer between the two splitters and should seal up nicely and function as a single unit. The stock “splitter” is more like an air dam and not very deep at all.

roger on the best bearings can get - was plan

I don't think you understand. You want the bottom of the splitter to look like this:[img]webkit-fake-url://fb00905a-231b-42fb-a489-0526dc05fae2/imagejpeg

Bill, Fully aligned with limited engine mods - will only add cold air, headers and X pipe along with flex fuel sensor and tune for E85 full time use. And then will only address any temperature issues until I can fully handle existing power.

18” vs 19” - the Hoosiers for the 19” 315 front 345 rear are almost identical to 18” Hoosiers - front is a little taller and it will allow recycling tires between two cars - IE save money on the biggest expense by far. Having 1/2” taller fronts should not be major concern- correct?

I have some aero data and real time feedback from several racers from over here in Bahrain at F1 track - a proper rear diffuser - that goes as far under rear of car as possible (to rear diff) makes an impact.......

Fmcokc - whose front splitter is that? Haven’t seen that design before.....link to vendor please if you have