Rev limiters-Motor killers?

Ok guys, here is a question that I am looking for some consensus on- Rev limiters- do they hurt motors? I have been told by a couple very reputable sources that if the motor hits the rev limiter a person should change the rods.
We ran at Mission BC last weekend. First full pass on a brand new set of rods, pistons and wrist pins. I had a 9800 chip in the rev limiter and it hit the chip at 9500 for 4 tenths of a second. The next thing was a clunk as number six rod left it's happy home and exited the block. I am really getting tired of squeezing rocks for blood to fix this thing. Any ideas on how to keep the reciprocating mass inside the motor would be appreciated. The motor didn't lean out according to the spark plugs or EGTs. I also didn't lose oil pressure either according to the racepak. Thanks, Dave Germain "Germinator" I'll be back.......

 

We run the MSD 8973 mag controller and it has the new limiter that doesn't hit the same cylinders in row. It doesn't hurt a thing. I know when we hit the rev limiter on the points box it's bad news.

 

I've heard from a pro mod team, it'll rev to 10,500rpm with no problems, set the limiter to 10,000 it hits it and destroys the valves/springs

 

From the MSDPROMAG.com website
. Can the Rev Limiter damage the engine?

NO! If and when the engine reaches the selected rev limit point the Rev Limiter will only drops cylinders randomly. The Rev Limiter is only as accurate as the input signal. The Rev Limiter is based on the incoming input signal from the magnetic pickup at the base of the generator or the pickup from the crank trigger. When the generator pickup is used it's not uncommon for the limiter accuracy to widen due to the mechanical slop or movement at high engine speed. This has been evident by a RacePak data recorder showing the timing variance (see above: What's the difference between a trigger from a magneto and a crank trigger?) In order to maximize the Rev Limiter accuracy it's advised to install a crank trigger.

The Rev Limiter Chip is a precision resistor with 0.1% accuracy that calibrates the Rev Limiter circuitry. The RPM value should not change by heat or vibration nor can a resistor be "Shorted". A resistor can be "Open" which would then result in a "No Rev Limit"

 

You should compare the graph from the points box limiter to the 8973 limiter. Not only did we not hurt anything, it didn't hurt the run as bad either.

 

Wow,..
2 say it can hurt the motor being on the rev limiter,..
and 2 say no, it wont.
and 1 resites from the msd web site..
Thats gotta relly help Dave out here

Dave uses points type box, not the 8973, no crank trigger

 

in our experience, hitting the limiter on the points box = damage.

 

Any Thoughts On The Psi Rev Limiters ?

 

In the class I have run for years no one has really hurt an engine that I have seen just hitting a rev limiter. Just untill the new msd stuff I have seen some real smart people and consistant hitting the rev limiter durring burn outs and about 900 feet with blown alky engines. These people have lost a few cranks and rods all the time. Do I have the wrong thinking hat on ???? I beleve that it is the rev limiter because of imbalance of cylinders like will stated. These people know how to build engines and there problem seems to be reacurng. I have sat back and watched the last two years and observed. What do ya think ????

 

My run was a normal pass, nothing out of the ordinary. I had a 9800 rpm chip in it and it hit the rev limiter at 9550 in high gear. According to the racepak it was on the chip for .4 of a second when I lifted. I didn't have enough clutch in the car so it drove through the cluch badly. We had missed our first qualifying pass so I wanted to make sure we could get down the track. I now know that a 10900 or 11000 chip is the way to go. I generally don't spin the car much over 9600 to try to save some parts. I had been told that RPM=$ but I know also know that Rev limiters=$ too.

 

Rev Limiters

We have hit rev limiter 3 times in last 15 passes with 6 shooter and each time it cost a set of rods. Went to 8793 and hit limiter 2 out of 4 passes only beat up a couple bearings. BAD, TFX, BAE VI, lencodrive, 2 step. lots easier changing bearing than rods, I'm happier.

 

You're not using the digital limiter in the retard box?