Anybody running 276 gears?
For my 73 Swinger I have a high performance 360, 904 with stage 2 shift kit, and 8.75 with 355 gears. I was running 410 and switched to 355 which was a very nice change.
I drive this car "a lot" and I've been considering using an even higher gearset. Pretty sure I would like 323 but thinking more radical possibly.
Do you still get the seat of the pants thrill with a high performance engine and 276 gears?
I run 2.77s on the hiway, and I love it. But that's in overdrive,
Does that count, lol.
Looks like Sooke BC is elevation 200ft. Do a compression test.
Here's a rough guide, for a regular TF with a 2000 stall.
I made it up based on my experience. and it works for me.
For First gear take-off;
If your hi-perf 360 is making
190 psi, she'll pull any gear.
By 180, 2.76s are still doable
By 171, 2.94s are pushing it
By 163, 3.23s
by 155, 3.55s
by 147, 3.91s
by 140, 4.30s
The pressures are incrementally 5% difference.
The gears are nominally 9% between.
If you need to bias one way or another, that is acceptable.
If you are running your 3.55s with 155psi 360, you are at the limit, I would not run less gear, unless you are willing to sacrifice some seat of the pants on take-off. If you are exceptionally happy with your 3.55s well then try 3.23s, but do not trade away your 3.55s.
I also have a HO 360. Yes I could do with 3.23s, But I also have more than 180psi, a clutch, and a 3.09 low gear.
I would NOT run 3.23s with a 2.45 low and a stock-type 2000 or less stall.
But I would with a 3000 stall. Maybe even a good 2800, I love those.
Jus my opinions
BTW, once the car is off the line, and half revved out in first, a stout 360 will pull 3.23s real hard. Just get her up to 3500 and mash it!