chuntington101

Thanks for the post / insight! I assumed (wrongly) that's GSpeed had opened up the underside of the car to get maximum airflow though the HE / oil cooler! Makes sense to use the stock opening (or maybe a little larger) that's used for the aux rad! Thanks for clearing that up!

Once again I wasn't trying to pick holes in the setup just asking the questions.

5thGear

You are asking the same questions I had before installing the kit. Actually I am sure you have a lot more questions like I did so don't hold back ask away. It's educational for everyone. Glad Eric joined the thread since he runs the same kit so you have two guys that can answer these questions

fleming23

I wish I had a chance to test mine more extensively before the weather cools off... I would like to post more positive data as well but have not had the track time outside of the short time attack last month which really did not show much except that water stays pretty cool/flat. There is an HPDE at Road Atlanta next weekend I am debating but not sure I have the time to attend.

I'll be at Road America in two weeks for the Optima event but the weather up there has historically been all over the place. I think they had snow one year so who knows what to expect.

ban25

Great report! Any lap times or video?

5thGear

Usually I run 1:48s and 1:49s.
For this events chicane at turn 16 was tight 90 degrees so it kills momentum before the main straight. Laps were in low 50's. Traffic and waving yellow flags (no passing) were a factor in every session. By the time I warm up my tires, I was catching to the tail end of 40 cars and then start working through it. I will try to load a lap or two video soon.

ban25

Nice! My best time is 2:08 in a 370Z. I'm currently eyeballing the SpeedDistrict event next month at ACS to get some track time on the Z06!

5thGear

Speed district is one of the best track day organization.


I might be there that Sunday.

GSpeed

5th gear, thanks for your write up! This kit was born from a need to keep cost down, and not change the aesthetics of the bumper. Id say it works pretty well!

We have 2 more levels of cooling that cut the bumper, but this stage 0 nips at the heels of the stage 1!

GSpeed

We have the screens in the wheel wells, but no direct air. The fans do the work with regards to airflow on the oil cooler side, and the auxillary radiator, which is now moved to behind the bumper cover on the drivers side. This same cooler is used for the Auto trans cars, as the transmission cooler. The manual cars have no trans cooler in this area, so we used this as an opportunity to cool the engine. Auto cars will run 15~* hotter. Its slightly under the normal timing temp, and about 15* less than the limp mode temp.

Again, we have other levels of cooling already, but this setup works REALLY well for what it is.

You get the following:

• Improved radiator
• improved oil cooling
• Engineered supercharger reservoir tank
• larger supercharger heat exchanger due to being laid flat now (Temps similar to OEM)
• oil cooler removed from cooling system
• trans cooler with fan for Auto cars
• Auxillary radiator for Manual cars

5thGear

In my opinion, The kit takes the car further away from the thermal limits. I was able to run lower temps in 30 minutes 95F ambient session than 20 mins session in 65F ambient.

Although intercooler performance is the same as OEM (but without cavitation and shutting off the pump), there is a good gain in eliminating the hot air from OEM intercooler that cooks the radiator and engine bay.

I believe there is even more gain to come from Stage 0 by opening small discreet screen under the grill to bring cold air to the first flat oil cooler. Also by punching holes in closed grill plastic above the brake duct and deflect cold air in front of fan operator coolers. I sent this feedback to Gspeed for review.

I believe Stage 0 does move the thermal concerns to the next weak link. Trans , differential, brakes, tire wear,.....

By running longer sessions in the heat, I went through brakes pads faster. Glad I brought extra set of brakes pads to the event.

5thGear

I have downloaded the PI tool box and spent some time navigating through it ( thanks Poor-sha for help getting started)
Bottomline, intake temps and ambient were not available channels. There were lots of parameters available except these two. My car is 2017 and it was built in Oct 2016. looks like not all 2017 Z06's show these parameters. Maybe there is a software update available to bring up these parameters.

Pacembellum

Can someone help me out with this I only see stage 1 and Stage 2 listed on G speeds website

four0nefive

It hasn't technically been released yet. I think they are working on getting it out soon, but a few people got it early for testing and such.

Pacembellum

Is it less expensive than 1 or 2 ?

chuntington101

How is the additional EWC rad routed? Is there a take off off the top hose or is it in series with the main radiator?

four0nefive

My guess would be less since you don't need any of the pieces for the bumper cut outs (since you don't cut the bumper for the stage 0 kit).

5thGear

Yes, its cheaper. Great for the weekend warriors that are not turning their C7 to pure racetrack car. The same kit will perform even more if you open up the bumper or down the road install ZR1 bumper once they become available.

In series.

GSpeed

We develop and test as much as we can before we release to the customer. The ones that have the system now, were all aware that they were one of the first.

Exactly!


All in, roughly 5500$. If you have your own radiator, you can deduct from that. We recommend the radiators we have tested, as well as 5th gear had great results with his Ron davis.

Im assuming you are talking about the auxillary radiator? We run it the same way that GM does for the 15/16 year model cars. If your car was ordered with the manual trans, hot weather kit, its a bit different. There were some changes there in 17 that caught us off guard, but we have that under control now.

Essentially, the hose that fed the oil cooler, and returned to the lower port on the left side of the radiator, is fed through a small heat exchanger before its fed back into the main radiator. Its worth 15* of water temp. Auto cars use this space for the transmission cooler, so they will run hotter.

The system is designed for those that want a system that will keep the car out of limp modes, and out of "engine coolant too hot" modes. It does not work as well as the stage 1 and stage 2 kits, but lets face it, any time you can get more than 50% of the performance for less than 50% of the cost, its worth it!

For the price, the system packs a lot of punch, and that was our goal. Not to mention, the aesthetics of not having to cut the bumper.

Mikec7z

Question for the guys at Gspeed...

the black oil cooler that is laid flat, down low, in front of the stock heat exchanger....
is there room to put that there without altering the stock heat exchanger size, or does the stock heat exchanger have to be brought down in size for it to fit?

What is the price tag for only that oil cooler and the necessary brackets that hold it in place?

What fitting are you guys using back at the engine to replace the stock oil cooler block? I already have a fitting with a thermostat in it that moves the plunger to prohibit oil flow and then commence oil flow once a certain temp is reached.

Thank You for your help