Poll: Who has ever hit the rev limiter?

[8cam]

Where's the option for "Not yet?"

[Hog]

People are very afraid of damaging an engine, GM set that limiter way below the point of rev related damage.

I remember the poster of a ZR-1 on my buddies wall, fuel shutoff=7200rpm. Such a magical number esp. for a stock GM engine with 80's technology.

[Paul Workman]

With the "500" package installed, it was still pulling hard when I would hit the 7200 limiter. In fact, I'd hit the limiter in 3rd gear just short of the 1/4 mile finish line. Marc reset it to 7600, and once in the "water box" at the track, I tickled 7600 briefly.

Now I depend on a shift light, which does NOT lag. I played with the trigger point until I found that spot where my 1/4 mile passes were optimized; 7100, if memory serves. (By the time I react, I'm at 7200-7300ish in 1st, around 72xx in second and the light comes on in 3rd very close to the finish line - on a good day.)

In the book "HEART OF THE BEAST" the certification was to cycle between max rpm every so many minutes (hours) and max torque. This they did for 200 hours; OR 8.33 DAYS! The test crew reported back to Dave McLellan after measuring it for wear, and told him it was good to go for another round. I don't think you're gonna hurt it if you bump the limiter, and certainly not for a run at 7000 rpm.

If the motor is stock, then (as I recall) 6800 shift may be about right. But, after the full porting, headers, free flowing exhaust and cam phasing, 7200 is too little - least here in FBI land.

[Blue Flame Restorations]

I hit it today. At around 50 degree cool air, that Turq car is absolutely brutal with the B&B exhaust and 4:10 gears. Can't wait to do a stroker!

[WARP TEN]

Originally Posted by Blue Flame Restorations

I hit it today. At around 50 degree cool air, that Turq car is absolutely brutal with the B&B exhaust and 4:10 gears. Can't wait to do a stroker!

Temps dropped to about 40 degrees here this morning. I didn't hit the rev limiter but I did hit the tire limiter--Couldn't get any traction in either first or second gears. Even third was a bit iffy. Still fun though until the first snow flies. --Bob

[Kevin]

Originally Posted by gbrtng

TOMTOM72:

With a stock chip in my 91 the shift light will light in any gear except
sixth if you hold speed for a while. Cruising 70 mph in 5th for a few
minutes at constant throttle it comes on. Change throttle position
and it goes out. GM nanny wants to remind you not to waste gas
and upshift.

I never watch the light when I'm hammering it so I don't know
whether it goes on at the rev limit - too many other things to
pay attention to !

just saw this old post,
90 is the one only that has the shift light for performance, the rest have it for fuel economy

[cadillac531]

Originally Posted by Kevin

just saw this old post,
90 is the one only that has the shift light for performance, the rest have it for fuel economy

I just saw this....

Not true, my 91 lights up for performance, and mine is all stock. I don't remember the actual rpm it lights up, but some where around 6400 I think.

[Kevin]

Originally Posted by cadillac531

I just saw this....

Not true, my 91 lights up for performance, and mine is all stock. I don't remember the actual rpm it lights up, but some where around 6400 I think.

i'm trying to recall my conversation with marc but i'm too many beers in to do so accurately, I thought he said it was 90 only. oh well I've been wrong before

[Schrade]

I hit it once in an '02 1-Ton Express Van that I bought new.

Kicks in @ 100mph. Felt scary too - heavy torqueing 5.7 has inertial forces at 100 that shouldn't change like that.

I had 265's on the corners, instead of 245's, so it was about 107 - 108

Lickety-Split Courier & Delivery!



I had it subsidiary of my primary C&D............

[Paul Workman]

Originally Posted by cadillac531

I just saw this....

Not true, my 91 lights up for performance, and mine is all stock. I don't remember the actual rpm it lights up, but some where around 6400 I think.

Around 6400 ya think? Hmmmm....

Pete and I were discussing the topic of where to shift for performance (on a stock ZR-1) with Jim (Jingles) Inglals (sp?). (Jim was the Corvette engineer that established - among other things - the drag strip numbers for the then new ZR-1) As I recall he recommended POWER shifting the Z at around 6300-6400 rpm (no throttle let-up between gears).

I think Pete and I agreed that neither of us is going to do any POWER SHIFTING as long as its on our dime if something breaks! But, to your comment regarding the UPSHIFT light coming on at 6400 for performance(?)...makes me wonder if it isn't more than just a "koinkeedink"

But, here's the thing: If Jim power shifts at around 6400, according to the tach, the actual rpm might well be at least a few hundred rpm higher than 6400, especially in the lower gears.

Just muddying the waters a bit...