Stocker 9" center gave up

Last time out 2 weeks ago I was cutting high 1.4 60' footbraking it and ripping off uncorrected 10.30's @ 132mph. Now this is at our mile high track with an NHRA correction of -.7 and +12mph. I was crossing the line at 5600rpm motor, 6500rpm 175hp nos.

I decided I wanted to expierament with a bit more gear and possibly knock down the nos shot it I ran a 10 flat because the car isn't cert'ed. 10 flat up here is as fast as I intend to go anyhow. In the gear swap process I decided to stud my stock center section for added strength.

Well, I'm too late. I had a ton of cap walk going on back there and a small piece of the case's cap mounting surface had even broken away from under one cap and was floating around in the gear oil in the bottom of my housing. Luckily nothing else happened. The angel on my shoulder must have been pushing her paper work thru because I think if I ran on it again something might have gave with spectacular starting line destruction.

Just ordered up a nodular case with beefy caps and 5/8 bolts as a replacement.

What gear were you running? Sounds like that thing moves pretty good!

I was running 3.89's.

The car works well with them but the rpm seems a bit low in the traps and you can hear it on the video. I believe they would be best at a normal altitude track. But up here, I learned many guys tend to gear their cars down a bit, especially if they are heavier like my brick, to get them moving in the thin air. I have 4.30's to try. I had tried them before and the car slowed down but I believe it was due to tired ET Streets and poor track prep. Not a fair comparison. Albuquerque Nat. Dragway finally got a track prep machine and wow what a difference. Easier to tune too when the car is leaving consistently. So I'm going to re-give them a try. If the car slows up, no biggie, I'll just swap them back.

Video? What video?
If a guy's got vids, they "must" be posted. I think you'll like the 4.30's. That seems to be a very good all around gear with these BBF powered big cars.
I've been contemplating trying some 4.30's as well, but last year, I went from 4.56's to 4.88's in my truck, and it picked up.






Doug...

Here's a pass from the end of last year to show what I mean. This was my first 10.3 pass. It spun a bit out of the hole. That has since been solved.

https://www.youtube.com/watch?v=3_5zWG-mOeU