2020+ C8 Corvette

November 2, 2022 / Cordes Performing Racing / Comments Off

Through extensive testing of products, and working on this platform since the very beginning. We have developed the following packages to allow you to easily choose which path best fits your goals and budget.

Naturally aspirated-

Stage 1:

JLT air intake
Cat-back of choice – AWE, Corsa, Stainless works, ARH, fabspeed, etc
Can keep OEM cat-back if you wish or do high flow cats first

Stage 2:

CPR Sport cats (GESI EPA certified)
Mighty mouse catch can
OEM PCM tuned
Includes the items in previous package
Before and after dyno printout
Optional E85 tune

Check out the video showing our stage 2 C8 VS a stock C8Z (low aero) at a recent 1/2 mile event. Our C8 has the high wing and went 148.8 this pass vs his 149.1. In the beginning of the day we went 150.6 and a stock C8 went 141.9 (high wing too)

Stock C8 slip Vs ours.

Stage 3:

CPR Cam package (optional ported heads available)
DOD delete using Johnson lifters
BTR trunnion upgrade
Driven fluids
OEM Gaskets
ARP hardware
OEM PCM tuned
Includes the items in previous packages
Before and after dyno printout
Optional E85 tune

Stage 4:

LME Stroker motor w/ specific spec heads/cam
Includes the items in previous packages
OEM PCM Tuned
Before and after dyno printout
Optional E85 tune

**LPE front lowering kit available for all front lift cars as well, or lowering springs**

Forced induction-

In house Twin turbo kit.

While we understand not everyone wants big power we wanted to develop a kit that worked perfect for the stock with turbo crowd up to the built motor with upgraded clutch crowd as well. Using twin Xona XRA5564S ball bearing turbo’s. These pack a ton of punch and flow 73 lb/min of airflow, so in a twin turbo application with an intercooler that uses twin garret 750 air to water cores you have a combination that can easily support over 1200 wheel, while providing turbo’s that light off extremely fast. We set out to make the absolute highest quality turbo kit on the market, we at no point thought how do we cut this cost down. It was solely how can we exceed everyone’s expectations. Because of that our kit we feel truly sets itself from the rest.

1) Billet intercooler- full billet top, bottom, side pieces with twin garret 750 air to water cores inside. Our billet intercooler has twin air dividers in it to straighten out the airflow before it hits the maf. This gives you the greatest chance of a perfect driving vehicle. The intercooler also has ORB fittings so we can use either the standard size line or swap to 1” fittings should it be a big power car running our front ice tank as well for maximum cooling when racing.
2) Extremely efficient and quick spooling turbo’s. Look at the graph over stock and you will see how quick these come in. They light off almost 400 rpms sooner than an equal precision and flow more up top.
3) Robust turbo’s. We verified years ago how strong these turbo’s are on a TT viper project we did, just like these you have to run a scavenge pump and to prove to the customer how reliable these turbo’s are we ran the car for 1 minute straight with the scavenge pump off to the point of oil pouring out of the turbo’s. We pulled the turbo housings off cleaned all the oil and reinstalled. Connected power to the pump and voila zero smoke! Try that with the other turbo’s and you will be sending them in for a rebuild I assure you.
4) Heat exchanger- We supply you with an OEM GM radiator (same as passenger side radiator) and on the coupe’s we offer an upgrade for big power cars to replace the top cap with our CNC billet piece that converts it to 1” lines. (HTC can’t fit it) This way you know you have a solid core heat exchanger and should you ever get a rock that hurts it the parts are readily available and direct drop in. This makes the install incredibly easy as it just drops in to the driver side pocket where there is already a mount and fan there.
5) Intercooler pump mount- unlike other kits we provide you with a very easy to install intercooler pump setup for any year.

This kit bolts right up to the OEM cats or our GESI high flow cat pipes so you have lots of options here. If you already have someone else’s pipes and they drop in like factory our system will bolt right up to them.

Now the question on power output. These cars like any car will vary in what they make stock and modified, it’s just the way things are. We pride ourselves on being extremely transparent and have been very open about calling out what we know are lies in this industry. We did it on the C7 platform and we do it on the C8 because some use those lies as marketing tactics.

-Your stock C8 with forced induction on pump gas will not make close to 700 wheel on the stock fuel system
-If you make mid 600 wheel and it traps in the 120’s in the 1/4 you were lied to
-The stock low side is absolutely at it’s limit at low 600 wheel, pressure is dropping. It will be safe but it’s dropping
-91 octane only supports so much, 93 about 15-20’ish wheel more.

Now that those few things are out of the way here is what our shop C8 did before & after. These cars range a lot on our dyno, we have had stock one’s make 413 wheel, and some do 442. They seem to average 430-433 or so. And in AZ they will trap around 115/116 stock. Which is what ours did. On 91 now ours makes 631/572. Stock it made 439/417. Others with the same setup have made 610/563, like we said all cars vary.

As of this moment the kit is available as an in house install only, we are working on instructions to be able to offer this through our dealer network that already buys many of the great parts we manufacturer here. But currently we wish to control the entire process of these cars.