I seem to recall reading somewhere that the '08 SS top speed is electronically limited to like around 127 mph? Anyone know if that is true? And if so--WHY? Yeah, I know, there's no need to go that fast...
Any way to 'unrestrict' it?
the LS models (pre 06) topped out @ 113, and IIRC the 3.4 was 108
a custom tune will remove it, possible a diablo sport may beable to do it as well.
They do it for "safety" reasons. They're actually trying to pass a bill in ON, CANADA, that says it is illegal to own/operate/import a vehicle that isnt speed limited to 140kph (about 90ish)..
Well then I guess what I read was probably true; I hate to acknowledge having done it, but I had my SS up to 120 today on a nice straight portion of I-80 in western Utah. Felt mighty good at the speed, no vibration and tracked well. I'll probably never do it again, but was just curious as to at what point the limiter would kick in. My old 2004 LS the limiter kicked in around 108. Thanks all for the info.
Here is a pic of a base model at it's limited top speed. A friendly reminder is posted on the DIC to let you know why your car now feels like a small parachute has deployed from the rear bumper. I believe it's to do with tire speed ratings as others mentioned earlier. The technology is better nowadays. My '91 Camaro RS V-8 would cut off at about 112, and I mean completely CUT OFF in a very abrupt fashion causing quite a jerk, followed by another jerk when the jerk driving still had his foot in it. Jerky.
I've had my 07 up to 135 on some open freeway in the country and it felt like it wanted to keep going. They shouldn't have changed them up that much but I could be wrong from state to state. Plus mine came with W rated tires. Not sure if thats standard?
As mentioned in a prior post...top speed is about 154 on the 06-09 SS. No rev limiter on the car. It just will fight with the wind. Had mine up to 135 and she still wanted to go but I didnt!!! Gets a bit light at that speed...remember folks this is an Impala here. As much as everyone says the SS is not deserving of its badge I laugh.....It is probably one of the quickest SS Impalas to come from Chevrolet out of all generations!!!
I was told that the 08 SS impalas cam with factory installed synthetic ATF does any one know if this is true or not ? If not I want to change the oil and put Amsoil ATF in the trans Thanks for the help.