Ultimate mistake....never leave the rev limit chip out....
I just gotta share my stupidity to keep anyone from wandering down the same sorry road.
A few weeks ago I was looking for a problem that caused a slight "nose over" just past the 1/4 mile stripe. I pulled out the high side rev limit chip and put it in the glove box. On the next pass, I determined the issue was a fuel pump that needed freshened up. I fixed the fuel pump...all was well.
I never put the high side chip back in. In 35 years of racing this car, I have never broken a driveline part that EVER made the chip necessary anyway.
This weekend at a Div2 points race at Silver Dollar Raceway in Georgia, I decided to test a new throttle stop program for Super Gas that had me leaving at close to WFO. On the first pass the car shook the tires violently at took off for the center line. I clicked it off...and drove it back...noticing a slight vibration that I could not easily identify. It apparently damaged the 10 year-old ring and pinion when it shook the tires. I went up for another hit..and at about 60 ft..it shelled the gearset..when I tried to re-fire the 605...it sounded odd...
After downloading the Racepak...I found that the engine went exactly 9000 rpm when the gear broke!
I loaded the car...went to Summit..picked up a new 4.56 cog..and a bearing set...and made an all night thrash setting up a new rear end, and swapping the 514 BT engine in to the car.
I made it back to the track...just in time to MISS the last time session for the day.
End of story...first round Sunday AM...zombie driver...still fuzzzy..bad light..and got waxed by one of my best buddies.
I hope the 605 just has a few bent exhaust valves. I will check it out his weekend.
Moral of the story...don't be a dumb ***! It is no fun.
Licking the wounds...still sore from the thrash.
1958 Ford Custom 300
wounded 605 - A head
Good old reliable 514..back in service