Redline on a 1999-2004 Silverado?
- Thread starter Chris B.
- Start date
- Status
My 98, has a 6000 rpm tach (different engine than yours), but it is governed to 5000 rpm.
I don't believe all engines are governed. My Honda Accord V6 is not governed. It tops out (not governed) at 130-135 mph. However, you may be right in that if I did some modifications to achieve higher speed, I might reach the governed limit.quote:
Originally posted by ZmOz:
ALL new engines are governed. Floor it and see what it gets to.
I'm talking about the engine, rev limiter, not top speed limiter. Although most new cars have those, too...quote:
Originally posted by benjamming:
I don't believe all engines are governed. My Honda Accord V6 is not governed. It tops out (not governed) at 130-135 mph. However, you may be right in that if I did some modifications to achieve higher speed, I might reach the governed limit.quote:
Originally posted by ZmOz:
ALL new engines are governed. Floor it and see what it gets to.
I'm not sure what your asking? The max rpms are 5900, which is commonly refered to as the "redline". I don't know what the red area your refering to is. Most newer vehicles, cut fuel or other things to limit the maximum rpms. Some do it right at the listed redline, some a little above.
-T
Ya there are mutliple types of redline...
1) The area on the tact where the white turns to red. (Usually on the right side)
2) The point at which the ECU/PCM shuts off the fuel. (Usually about 1/4 of the way into the red area, 7000 rpm on a Mazda 6s)
3) The point where you hear a horrible metal on metal bang/clank/shutter/scrape/clunk followed by the car shutting off.
4) A really good synthetic oil.
1) The area on the tact where the white turns to red. (Usually on the right side)
2) The point at which the ECU/PCM shuts off the fuel. (Usually about 1/4 of the way into the red area, 7000 rpm on a Mazda 6s)
3) The point where you hear a horrible metal on metal bang/clank/shutter/scrape/clunk followed by the car shutting off.
4) A really good synthetic oil.
On some cars and trucks on the tach it will have a red area start where the numbers go up high. Sometimes this red area is solid where it starts and sometimes it starts with crosshatching and blends to solid red the higher it goes. I hope I explained that well enough. I was wondering if the crosshatched red area was redline or not till the solid area starts? My truck does not have this red color at all just 0 up to 6rpm. I'm wondering where this red color would start if my tach had it?
The Car or trucks top speed is determined by the tire rating it comes with from the factory. Take a LS1 Fbody Z28, top speed of the car is 167mph. If you ordered the car with Z Rated tires capable of those speeds you will not hit the governor until 167mph. If you ordered the Z28 with standard tires the governor is then set at 118mph even though the car is capable of speeds higher.
My '03 Avalanche has the 5.3L V8. There is no redline on the Tach, but the ECM (Engine Control Module) is programmed to shut off the ignition at 6000 rpm (not available for re-programming). The transmission Shift points are programmed substantially lower (about 5500 rpm), but can be reprogrammed (with an aftermarket programmer) up to 6000 rpm. Most advise setting the shift points no higher than 5800 (or possibly 5900) as there is no performance advantage anyway.
So you would never get to any redline on the Tach if they bothered to put one on it... At worst the ECM will prevent you from over-revving....
You don't need to artificially limit yourself to 5000 rpm.
HTH.
Just for reference, Ford does the same thing in their F150's - tach goes to 6000 rpms with no redline shown. However, in the regular 4.6 and 5.4 V8's, the engine computer will limit revs to right around 5000 rpms.
So while the tach doesn't show the redline, the engine computer knows and manages it for you.
So while the tach doesn't show the redline, the engine computer knows and manages it for you.
- Status
Similar threads
