CorvetteForum - Chevrolet Corvette Forum Discussion - WEAPON-X C7 ZR1 resets Quickest/Fastest 9s Quarter Mile Time: 0-60 MPH in 2.40 flat

Since a lot of you guys seem to be tracking the 2650 superchargers, I figured I'd share this here as well. The stock supercharger on the ZR1 is really impressive, with one exception... it gets insanely hot. So, I've been working on some products and was doing some testing today. But to put down 800whp and run high 9s at 140mph with a stock calibration (with a little manipulation here and there lol) is just incredible! It's currently making about 18psi and I'll be really interested to see the tune once they get into it more. The LT4 supercharger spins at about 20K RPMs and makes 650bhp with 10psi. The LT5 supercharger spins at about 16K RPMs and makes 755bhp with 14psi. The logic to me is slightly backwards with the supercharger spinning slower and making more boost and only 105bhp more with 4psi more and that's only 25bhp per psi. BUT at 18psi making about 950bhp, which is 50bhp per psi, which makes more sense to me. Regardless, aside from the hot lid which I've found quite the solution for below, the car is killing it cutting mid 1.4s and running 140mph. I'll have the TCM unlocked shortly and work on the shift times and speeds, which should really help get that closer to mid 9s. Had a chance to get back to the track again this morning as a Nick H came in town to pickup his Camaro SS with the Edelbrock S/C and our Boost Freeze chiller, so I had him come out with me so I could dial his setup in more as an avid drag racer. Afterwards, I was able to make a pass a couple passes myself at 12:37 PM and again at 1:52 PM. DA was 1100ish

First off, it was amazing to see this car knock out a 2.40 0-60 MPH time, as that surpasses the $3M Bugatti Chiron and ties the $1.25M La Ferrari and Lambo Aventador SV for a fraction of the price. Anyone saying the ZR1 isn't drag capable is dead wrong!

I cut a 1.49 and then a 1.44 - 60' time today, which is an amazing feat considering it is still a stock calibration more or less. I cannot adjust the nannies yet, PE mode, spark, the torque model etc.
Blasted through the 8th mile in 6.438 at 111.77 MPH
And reset the quickest and fastest quarter mile again today with a 9.928 at 140.49 MPH! I would've liked to see 9.7s and I still think it can get there, but I need to make a few changes to some sensors.

A big thanks as always to my sponsors with black ceramic coated Kooks 2" Headers with Green Cats giving that ROWDY growling cackle, especially on decel ;) and also Forgeline GA1R Open Lug 18x8.5 and 18x12.5" wheels, with tires/tpms come in at just 40lbs on the front and 46lbs on the rear! This is a combined 40lbs lighter front and rear than the Forgeline VX1Rs I've been running with Michelin Cup2 ZP tires as they weigh in at just 50lbs on the front and 56lbs on the rear with tpms. And that is about a 20lb overall weight savings vs. the OEM wheels.

The difference on this trip was testing of a few new products:

1. WEAPON-X SuperFlow Carbon Stage 1 Intake - which performed just as expected after dialing in where I want the AFR and Spark from our previous versions. It was covered in high temp resistant foil, despite being a carbon 3D print... or the Tin Man isn't just looking for his heart :rofl:

2. WEAPON-X S/C Thermal Spacer for the LT5 lid - this was extremely interesting as the lid temperature after shutting the car off on a NON-spirited drive was 145* under the cowl, an hour later 155*, another hour later 165*! After the lid spacer and a 140 MPH quarter mile blast, the lid was only 120* and after a similar NON- spirited drive home it was only 115*. A 30* temperature reduction on this is just incredible because the intercooler bricks are located in the huge LT5 supercharger lid, not down in the runners like the previous LT4 variants and to keep that heat from soaking into your intercooler system just from heat transfer is priceless. So, it is definitely working, helping to prevent the heat transfer via conduction from the hot engine/cylinder heads/manifold below it. We're using a patented material to make these, unlike some of the other materials on the market used for spacers that tend to warp a little more under more extreme heat.

Here is the cowl after driving 15m into the shop:
http://i10.photobucket.com/albums/a1...psmnbzs9xx.jpg

Here is the lid! You can see how much heat it conducts from below and the insulated carbon cowl just holds that heat in with no where to go (for now ;)):
http://i10.photobucket.com/albums/a1...psiyssty6f.jpg

Here is the lid after a 15m drive home with the lid spacer, the 45* temperature reduction is incredible!
http://i10.photobucket.com/albums/a1...psp2dsmugh.png

http://i10.photobucket.com/albums/a1...pskqenaycx.jpg

3. WEAPON-X: ZTK Drag Wing Brackets to lower the tall ZTK wing down some for less down-force at straight line events.

Previous mods are our WEAPON-X950 Package:

1. WEAPON-X SuperFlow Stage 1 Intake (coming soon above)
2. LT5 Ported Throttle Body
3. Kooks 2" Headers ceramic coated with Green Cats
4. WEAPON-X Griptec Stage 3 Pulley
5. WEAPON-X Sensor and Fuel Kit
6. 160* Thermostat
7. Brisk Spark Plugs
8. Magnecor 85kv Spark Plug Wires with Heat Shields
9. Elite E2X Catch Can Kit
10. WEAPON-X Custom Valve Covers and braided PCV lines/fittings
11. Akrapovic Titanium Exhaust

And this package laid down just a hair under 800whp a couple weeks ago!

http://i10.photobucket.com/albums/a1...psx7axjwsk.jpg