This weekend I took my 2001 Coupe, A4 transmission in for a Dyno run. During the Dyno, the technician ran the Dyno with the car in No#3 gear and did not let off on the gas at 6000 RPM, at approximately 6400 the rev limiter kicked in. The car sounds and runs perfect but I am wondering if the valve springs or anything could have sustained any damage at that high of RPM. The car still runs strong and the engine sounds good as it did before. Please give me your opinion if the engine could have sustained damage at that RPM and with the Rev Limiter activating. Thanks,


[Modified by Norris, 12:37 PM 11/19/2001]

 

It's highly doubtful you hurt anything, but 6600 rpm is a bit too high for reliability in an LS1 with a stock valve train. There's nothing to be gained by over-revving an engine. At what rpm did you make your peak horsepower? My guess is it's well below 6600 rpm.

 

Paul, I think max HP was attained at 5800 RPM. The tech screwed up, I asked him not to exceed 6000 RPM. I don't think he knew what he was doing. The Max HP was 302 and the Max Torque was 319.3. With the mods I have, I was expecting better. The car runs and pulls strong. Thanks for the input

 

Odds are that you have no issues with your motor for the rev limiter is your first line of protection against motor damage... Worry not...

Nick

 

I hit the rev limiter a couple of times a week in daily driving and i hit it a lot at the autocross. I have 38k miles, still runs strong, uses minimal oil and eats M3's.

 

That's the purpose of the Rev limiter, to shut down before harm is done.

 

I agree that the rev limiter is the "first line of defense" but when it's at a stratospheric 6600 rpm, it's not serving a purpose. If maximum horsepower is at 5800 rpm, there is no reason to rev that engine over 6200 rpm. The chances of damaging an engine go up exponentially the higher you go above redline. Remember, this is a stock valve train...

 

Thanks to all who replied. I feel better about it now. The car sounds normal and runs strong. Thanks again for the info and moral support.

 

Paul -

He said 6400 rpm not 6600 rpm :confused:


[Modified by CliffB-99, 9:38 AM 11/20/2001]

 

I hit it all the time... - I think I need a shift light ...;) The TQ curve is so much smother than my 5.0 slow was. I could tell when to shift the mudstain cause it ran out of breath right at the red line. The LS1 will pull all the way to redline with no signs of giving up.

:seeya

 

Cliff, What Paul was refering to is that I initially thought it was 6600 but after checking the print out of the dyno run, I saw the max RPM was 6400 when the rev limiter kicked in. I then edited my post. Hope this clairifies things. I am sorry for any confusion.

 

I love my '02 Z06 Corvette, but I can't believe you would claim that your Vette "eats m3s" when it comes to an autocross??? In what kind of situation other than a straight line does it have any hope of beating a properly set-up m3, especially in an autocross? My stock '02 Z06 won't touch my 1987 F-Prepared (SCCA Class) BMW 3 series car when it comes to autocrossing and I'll bet your modified Vette won't either. :smash: :chevy

 

Check out the Motor Trend article "Speed Wars".
C5 Z06 beat M3, 5 out of 6 and they tied in the other.
I don't race M3's at the autocross. I race in SS. M3's race somewhere down the list.





[Modified by RedLandRocket, 10:37 AM 11/20/2001]

 

Oh, I'm terribly sorry, I thought you were implying that YOUR Vette "eats m3s" at autocrosses as written in the context of your post. I understand that the '02 Z06 Corvette can out perform the stock 6 cylinder M3 by almost .1 second 0-60 (while weighing some 300 lbs less and having a mere 75 more horsepower), but that has NOTHING to do with YOUR Vette and autocrossing. Sure, the Z06 wins 1/4 mile racing as well as skidpad, but again that is likely due to the fact that it comes standard with more rubber touching the pavement and loads more torque and horsepower (much like the 03 Viper will again kick butt by beating the Z06 with brute force). But, as you should know, autocrossing is NOT an area where brute force will win. AND, you DO race against M3s at autocrosses because everyone races for FTD in every event! By the way, if you are racing your car in SS as you claim, and the mods that you have listed are also true, you are cheating in each autocross you run the car in a stock class! Might want to read the rule book and run against the cars that you are supposed to be classed with instead of loading the deck in your favor!! :hat

 

My C5 does eat M3's. I had one for lunch the other day. His car kind of quit above 120 mph or maybe it was the driver, either way, tasted good.

At our autocrosses, FTD is always won by a go kart, a dune buggy, an A/SP, B/SP or an SS. I have never seen an M3 up there, must be a mistake.

BTW, I can disconnected the MAFT in about 5 seconds. The tech guys don't have a problem with my Euro tail lights, either. I don't autocross for a living, it is only for fun.

Also, you don't sound like a 'Vette owner to me. There was a lot of negative C5 stuff in your post. Maybe an imposter!!! :conehead

 

Let me guess you own a M3 Markard or do you just like to stir up a debate with only 4 posts?

Just curious.

:confused:

 

Markard = :troll

 

I have a 2002 Torch Red Z06. I do not have an m3, but instead just a little old 1987 BMW 325is that runs in F Prepared in SCCA autocrosses. It eats Corvettes like popcorn in an autocross environment. Has yet to be beat by a SS legal car in any autocross event anywhere in Southeastern US. I also road race in SPO in SCCA. A properly set-up Z06 will certainly whip my regular 3 series BMW on big road courses like Road Atlanta, VIR, Road America, and Texas World Speedway, but again that is not the context of your comments regarding eating m3s and autocrossing. Furthermore, it is NOT up to the Technical Inspectors at an autocross event to properly classify your race car. According to car descriptions in previous post:
"RM Racing Twin K&N, MAFT, EASE scanner, NGK, Magnecor, Corsa Indy-Pro, Z51, Bilsteins, Euro Taillights, Z06 Calipers, Design Specialities Letters, frame savers, rocker rails, harness bar, Simpson 5-point, column-lock bypass,A4."

You are still NOT LEGAL to run in SS! Always nice to hear a CHEATER that is afraid to read the rule book and properly classify his/her car according to the rules of the event, brag about who and/or what he/she can beat. Last time I checked, everyone who autocrosses does it for fun, only most folks have enough integrity not to try to cheat in an amateur event and then try to tell others how great their "stock" car is.

Not trying to bash my new car, just trying to keep folks honest! :jester

 

I think you get my point!
:cool:

 

Where have you gone?