It does have Total Seal gapless rings, but I believe we set the gap at .022. Should have been plenty for 7-1/2 lbs of boost.
Ok. So this happened. I've been trying to talk a guy into running his Nova, at the drag strip for years. He finally agreed, but then told me, that he wants ME to drive it at the track! He has owned this 70 Nova, since 1973!
548 BBC! TH 475, 3.73's. drag radials, etcView attachment 415727

We both know that chart is wildly inaccurate…Yes, .022 should be enough for that bore (4" ?) up to about 15 lbs of boost. Does the 2nd ring have two rings for the gapless feature? Is it possible one of the two butted up? It looks like a classis ring butt failure, may have been a weak piston?
How old are the tires? More engine details?
You have my app, you can do better than that...![]()
I don't have a lot of engine specs. 548 cid. 11-1 compression. I believe a .680 lift cam. 1000 cfm carb. race gas. Tires are new. 295/55-15 Mickey Thompson.Yes, .022 should be enough for that bore (4" ?) up to about 15 lbs of boost. Does the 2nd ring have two rings for the gapless feature? Is it possible one of the two butted up? It looks like a classis ring butt failure, may have been a weak piston?
How old are the tires? More engine details?
You have my app, you can do better than that...![]()
Here's the old set up.
New set up will look pretty much the same but will have the wiring cleaned up and the heater deleted properly.
View attachment 415888Very Nice! Love the vac pump!
That was really cool! Great time for the shape it was going down the track… Awesome! Her eyes said it all.Watch her eyes
Your family is quite something!I've also driven this, my Dad's creation with his brothers race shop doing the fabrication.
A 36 Ford Fiberglass pickup body, iron headed big block Chevy in the back, glide, Dana 60, Mustang II frontend, Undercover Dragster rear chassis, custom fabricated cage in the middle.
I ran 8.93@151 with my first ever Wet Volcano nitrous Prototype test.
View attachment 415950
Epic shirt!Thank you, drag racing has been in the family for decades, here is my daughter wearing a Folk Racing shirt, my cousin came up with this graphic, fits the family well...
Also, the Willy's is about to be back in action with aluminum heads! It's been down for over two years waiting some TLC.
I'm an amateur compared to my uncles/cousins. They race for a living and build entire race cars. My cousin has won so many races I lose track, he has a wall of Wallys, and 3 of my cousins have been World Champions in their classes for a year or more a few years back, and two of them have won two national events in the same weekend (doubled). They just a built a 4 link dragster from scratch(they are building 5 or 6 of them and selling most of them), and won a $10K race the 2nd outing with it a couple weeks ago.
View attachment 415968