TCM Tuning
Safety Car
Joined: Nov 2005
Posts: 4,364
Likes: 929
From: Huntsville Alabama
I know with C7s we could not change the tach, or even the tack warmup display. for example, running cooler thermostats and such the car always thinks its cold and shows it as such and shift lights happen in HUD sooner and stuff with the cooler thermostate. I removed and went back to normal because of that. I am sure the C8 will be no different. you can see what you have and that's a display unless separately hacked.
But in traditional V8s spinning a street set up past 7000-7500 is kinda rare. I mean some do it but in general every Heads cam LS / LT set up is generally around that mar unless some special deal. Granted that may be what helps these crap geared C8s haha
But in traditional V8s spinning a street set up past 7000-7500 is kinda rare. I mean some do it but in general every Heads cam LS / LT set up is generally around that mar unless some special deal. Granted that may be what helps these crap geared C8s haha
Le Mans Master
Joined: Mar 2001
Posts: 8,420
Likes: 3,911
From: Omaha
2020 Corvette of the Year Finalist (performance mods)
C4 of Year Winner (performance mods) 2019
...And the idea of a shift light brings me back to the Ol' Fox Body Mustang days where the kids in them loud BS 13-sec cars had the bright *** HUGE yellow aftermarket tach light just off to the side of their steering column, literally a driving hazard how bright and big they were LOL
...
...I agree, revving past 7000 probably wouldn't be something most people need/want. Going higher than that is going to put a lot more stress on the valvetrain and make it less streetable. Not saying some won't do it, but those that do will be willing to live with a shift light.
Pro
Joined: Sep 2000
Posts: 678
Likes: 310
From: McKinney Texas
If it's auto shifting, it wouldn't matter. But for manual mode, you can actually get the tach to show numerical in some modes, although it's going to be hard to time a shift based on that. I'd either shift at 7K or add a separate shift light. I had a small red led shift light in the AC vent on one of my C4 ZR-1s, and it was perfect, when it lit, I didn't even think about it, I just shifted reactively. Had a 7400RPM rev limit and the shift light set at 7200, never once hit the rev limiter when relying on that light.
I have the display showing numerical RPMs, which also displays the factory shift lights.
When the factory shift lights flash red a few times the gauge on the left flashes a solid yellow screen with shift in big red letters, then I shift.
The secondary shift light is set 200RPM below actual redline to give me time to react.
