benspruce

This is probably a dumb question, but why is it that after I start my 2016 Z06 A8 I can't rev the engine past about 3500 rpm? It just stops reving even though I have plenty of room left in the throttle pedal. This happens whether I'm in Park or Neutral. Can someone help my feeble brain? Thanks

LSX Camaro

It's a computer controlled rev limiter to protect the engine. Normal operation.

John Settembrino

Let the engine warm up a bit before you rev it. This is what destroys most engines of all types. It's not water temp, but OIL temp that really matters! I guess after the LS7 issue finally G.M. got smart and installed this program to protect the engines from falure.

Higgs Boson

The GM ECM has always had rev limiters based on oil temp, run time, coolant temp, etc etc

b4i4getit

Why would you want to rev it past 3500 rpm while you are in park ? You are not going anywhere, causing unnecessary wear and wasting fuel.

Checkmate1

Most cars these days prevent revving past 3500rpm when in park on start. Why anyone would want to rev a car on idle is beyond me....unless showing off.

NSC5

I have never understood this purposeful abuse of an engine by trying to rev it to redline with no load. The rate of engine RPM increase is very fast with no load and if the normal redline limiting mechanism were in use it would likely allow significant overshoot before reacting. Even in first gear the rate of increase is much slower.

Edwardz

3500 rpm it the "perfect " speed to do a neutral drop. Simply floor it and then shift from neutral to drive. Kind of like "rev match " for the A8 with more dramatic results.

b4i4getit

Dramatic results being "its time for a new transmission and warranty won't cover it".

davepl

sunsalem

Funny but true...
I had a small crowd around my car once asking the normal questions and someone asked me to rev the engine for everyone to hear.
Although I'm not a show-off by nature, I said, "Sure."
Needless to say, it wasn't too impressive because of the rev limiter.
At the time, I was unaware of having one.
No one was terribly impressed...my face got a little red.

davepl

I was in "canyon" between two large condo developments yesterday, sitting at a light. Guy from his balcony yelled

"Let's hear it!"

Knowing free-revving in neutral isn't the hot ticket, I waited for the light and then planted it for about 2 seconds. Didn't even likely break the speed limit, but the sound, especially in the open convertible and with the Corsa pipe, was epic between the two buildings. I think I scared him!

NSC5

Dave,
And that is a point a lot of people miss. The engine and exhaust, especially with a LT4, won't really sing until it is producing the power it was designed to produce.

sunsalem

I think you're right about that.
It isn't really memorable until it's above 4500 RPM.

GM's smallblock has never done much for me aurally.
IMO, it comes up short compared to Ford and Dodge.
The GM doesn't have the personality of the other 2 (if that makes any sense).

pucksterlv

Eh...they're a lot more fun when you rev in "D" anyway.