2017 Colorado Redline
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Discussion Starter · #1 ·
When I test drove a 2017 Colorado a few weeks ago I randomly noticed that it did not have a redline on the tach. I've searched around and can't find an answer anywhere. Anyone have any ideas as to why?
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When I test drove a 2017 Colorado a few weeks ago I randomly noticed that it did not have a redline on the tach. I've searched around and can't find an answer anywhere. Anyone have any ideas as to why?
GM had a mistake on the 2015 tachometers, so likely a way to avoid having that issue raise it's head again. Search tachometer in the late 2014 - 2015 timeframe. There was a thread or two on it.
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Oh. . . the ECM rev limiter will let yo know where red line is. :wink2:
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Oh. . . the ECM rev limiter will let yo know where red line is. :wink2:
If you are looking to redline your truck, especially on a test drive, you should be looking at the Camaros and Corvettes.
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Discussion Starter · #5 ·
Oh. . . the ECM rev limiter will let yo know where red line is. :wink2:
So does that mean they don't put redlines on the tachs anymore? I don't have a problem if the ECM limits it, I just have never seen a tach without one.
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Do you plan to redline your truck a lot?
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My 2016 doesn't have a redline also
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I have a 2016 and all the lines are red on my tach.
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I have a 2016 and all the lines are red on my tach.
Oh man. You're redlining at idle lol
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Max horsepower for the 3.6 is at 6,500 to 6,800 rpm (depending on the vehicle it is used in) and redline is at 7.2K. High revving engines these are, and, in Camaro tune, they are making just shy of 90 hp per liter. Each cylinder making around 55 hp and displacing just under 600cc.
Being a motorcycle guy, it occurs to me, one cylinder from this engine would be awesome in a serious dual sport dirt bike, two of them in a V configuration would be righteous in a cruiser 
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Being an older guy when gasser car/truck redlines were all in the 5500 RPM range. I just cringe when I hear these newer engines winding up like they are Huey turbines. I just don;t see it being any good for longevity. Hell, even my Yamaha outboards top out at 6,000. 7200 out of an engine that big just sounds crazy to me......
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Front end aloft and having fun at 73 mph and 12,000 rpm on my '06 FZ1. It makes power to 11,750 and the rev limiter comes in 1,000 rpm later at 12,750, which brings the front end down nice and easy.
My bike as a 56.5mm stroke, while the V6 gas an 85.6mm stroke. Therefore the bike's engine's smaller 73mm piston (the V6 piston is 94mm) is traveling 66% as far to make a revolution as the V6's. So, ignoring the fact that the V6's piston is bigger for a moment, a 7,200 rpm redline is equivalent, raw piston speed wise, to the bike engine turning at 11,000 rpm.
Factor in the larger piston (not to mention the valve train) and the overall stress at redline would seem to be in the same ballpark as my bike's engine. Of course, my bike is an '06, the newest ones rev limiters come in at over 14,000 rpm, which I believe is approaching the limits of how fast ordinary gas can efficiently burn in the bike's comparatively small combustion chambers.
Motorcycle engines can last a long time - I know of people with over 200K miles on their bikes, but those are admittedly outliers. Still, a 4 wheeler has to have durability that motorcycles simply don't.
These modern GM engines really are pretty incredible, arguably more advanced than even cutting edge motorcycle engines are. That most certainly was not the case in the past.
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Source: https://www.coloradofans.com/threads/2017-redline-on-tachometer.333714/
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