https://www.corvetteforum.com/forums/ General ZR1 Corvette Discussion, Technical Info, Performance Upgrades, Suspension Setup for Street or Track en Sun, 10 May 2026 03:36:59 GMT vBulletin 60 https://www.corvetteforum.com/forums/images/misc/rss.jpg https://www.corvetteforum.com/forums/ https://www.corvetteforum.com/forums/c7-zr1-discussion/4990069-radar-detector-power-tap-in-c7-zr1-new-post.html Mon, 04 May 2026 13:44:55 GMT I have power tapped multiple C7s, but when I pulled the back cover off of the mirror on my 2019 ZR1 I saw a different wiring setup. Anybody had success with this power tap, and if so, how to? I have power tapped multiple C7s, but when I pulled the back cover off of the mirror on my 2019 ZR1 I saw a different wiring setup. Anybody had success with this power tap, and if so, how to? ]]> C7 ZR1 Discussion khoeysr https://www.corvetteforum.com/forums/c7-zr1-discussion/4990069-radar-detector-power-tap-in-c7-zr1.html https://www.corvetteforum.com/forums/c7-zr1-discussion/4988339-ecm-hptuner-new-post.html Thu, 23 Apr 2026 23:11:19 GMT Has anybody had c7 zr1 HP tuner ECM go bad. Has anybody had c7 zr1 HP tuner ECM go bad.
]]> C7 ZR1 Discussion Triangle1 https://www.corvetteforum.com/forums/c7-zr1-discussion/4988339-ecm-hptuner.html https://www.corvetteforum.com/forums/c7-zr1-discussion/4987176-thinking-of-selling-my-m7-ztk-zr1-new-post.html Fri, 17 Apr 2026 17:30:07 GMT I'm thinking of selling my beloved ZR1. I just don't have time to drive it much. Anyone know how to properly value these ZR1's? Seems prices are all over the map.

I'm the original owner and it has 1600 miles. Perfect condition. 3ZR M7 with ZTK black interior, comp seats with red stitching. Also has factory Jake air box for +17hp.




]]> C7 ZR1 Discussion vetteb_96C https://www.corvetteforum.com/forums/c7-zr1-discussion/4987176-thinking-of-selling-my-m7-ztk-zr1.html https://www.corvetteforum.com/forums/c7-zr1-discussion/4986560-helpful-supercharger-pulley-and-belt-information-new-post.html Tue, 14 Apr 2026 18:13:59 GMT When I started playing around with pulley sizes on my car, I found it near impossible to find any good information, so I basically had to figure out belt sizes for different pulley sizes on my own.... When I started playing around with pulley sizes on my car, I found it near impossible to find any good information, so I basically had to figure out belt sizes for different pulley sizes on my own.
I wanted to share everything I learned in hopes it will save someone some time and money in the future.
If anyone has any other pulley/belt combinations they would like to share, please do.

The stock supercharger pulley is 3.30"
The stock crank pulley is 8.07"
Here is a cool calculator that allows you to figure out approximate boost according to pulley size
C7 ZR1/LT5 Supercharger Boost Calculator

To run a Griptec 2.9" or 2.75" pulley you can do it with the stock length belt, but you will need a 100mm idler pulley. The stock idler pulley is 90mm
I found the 100mm idler pulley here Billet LSX / LTX Idler Pulley - 45 mm / 1.772 inches Thick

You can run the Gates "Green Belt" with part number K120858HD which is a 2179mm belt with either the 2.9, or 2.75" pulley with the 100mm idler pulley.
This Green Belt is a 12 rib so you will need to use a razor blade/razor knife to cut off one of the ribs. Very easy to do.

You can run a 3.0" pulley with the 2179mm Green Belt, but you will need a 95mm idler. Also available in the link above.

I have decided to keep the 3" pulley with 95mm idler on my car so I will be selling a like new 2.9", 2.75" and a 100mm idler pulley if anyone is interested.



]]> C7 ZR1 Discussion 69 Vette https://www.corvetteforum.com/forums/c7-zr1-discussion/4986560-helpful-supercharger-pulley-and-belt-information.html