Having put a deposit on a zl1 paying down my 2ss, my dealership moved, I got my deposit back as the crystal red was under constraint and they ordered there one car a year in grey with different options and blew me off, I took my deposit to another city and bought a crystal red ss with all the options I wanted and do not regret it much.
For 1 its my daily driver and I go in road trips with it. It puts plenty of power to the ground and sounds great with the dual mode exhaust. I do not have to get a separate set of wheels and tires for the rain and bad weather, or pay two hundred more dollars a month. I do not have to worry if the supercharger which is the 1900 is going to go out, I do like the ride suspension and the driving modes on a zl1, yet not the fuel economy.
When you figure it out a stock ss can make easily 500 h.p. with good exhaust a better throttle body, headers and a tune....so for a few thousand and your around 450 RWHP, and the zl1 is about 500 RWHP. Now it of course would be easier to build a zl1 to more massive h.p., with just pulley changes and such...and void your warranty as a tune will on a ss. Yet if your just wanting to race and be reliable a naturally aspirated engine is more reliable with less to break down and easier to work on. The zl1 would also require for a couple thousand some 1000 h.p. rear axles as they are the weak link, some upgrading to its suspension for several thousand at least.......and then you could wonder about if you should have taken and gone with a 2300, or 3000 whipple etc...
I have looked at a lot of varied options for getting more power, for complete packages there are magnuson, and edelbrock, etc and some turbo kits that seem quite nice. That is a decision you will have to make....
Heres a article on a good rear end upgrade
Install and Review: Eaton Detroit Truetrac For The 5th Gen Camaro SS - LSXTV
here is a good twin turbo kit
IPS 2010+ Camaro Twin Turbo Kit - Turbo Kits - Forced Induction - 2010+ Camaro SS - Camaro
here is a good magnuson package
Camaro SS 378 CID LS3 650 HP Magnuson TVS2300 Supercharger Package | Lingenfelter Performance Engineering
wanna upgrade a zl1..........
2012 - 2013 Camaro ZL1 Performance Parts & Upgrades | Hennessey Performance
Livernois Motorsports: Specializing in Late Model Domestic Performance Parts
Apex Motorsports is your source for performance parts and accessories for 2010 Camaro, Dodge Challenger, and Ford Mustang
JEGS Performance Auto Parts - Holley - Billet Specialties - Edelbrock - MSD - Moroso - Mr Gasket
And what ever you build the car too the brakes and suspension and cooling have to handle it, and a zl1's intercooler has a lot to be desired, so people buy better ones, and quick chillers that use the ac to cool it. All in all there is a lot to be considered, and it gets expensive the more go for power. Good luck. You can search autotrader.com for used zl1s .
2013 2ss/rs NPP CRT, Forged 428 ls3 stroker, Mast windage, GMPP ported heads, Katech chain, Trunnion upgrade, Cam motion stage 3, SP headers, Vmax PTB, Monster c7 dual clutch, Mgw shifter, Fluidampr 25%UDP, CAI induction, rocket racing wheels, clutch reservoir, bmr toes and trailing arms, Lpw diff cover , scanner, drl's led /fogs, elite catch can, MRT louvers, tint, ZL1 spoiler, stripes & badging, etc....