OK, time to back off and reassess this whole thing.
My 1987 CRX si is used exclusively for autocross, mostly in SCCA local regions.
The problem I have is that 2nd gear is too short - according to my GPS speed (a Dual WAAS enabled 10hz bluetooth), it topped out at 54 mph, which on national style courses often creates sections where I hit the rev limiter. Rev limiter or upshifting, either option makes me slower than if I could just stay in the same gear.
I picked up what I thought was an HF, but I think it's a California HF - GPS tells me top speed in 1st gear is 44 mph. That's way too tall, and creates the same problem I had before only it's 1-2 rather than 2-3. I'm going to check the ratios this afternoon to be sure.
The transmission I replaced I thought was a 1987 Si, but using a MPH calculator, I come up with 48 mph in 2nd gear but my GPS speed for the top of 2nd is 54. The closest to that speed at the top of 2nd is a regular HF, so I'm working on the assumption that the old trans is not an Si but a 49 state HF. It's apart, so I can check the ratios.
According to sources I've been able to dig up, the 1985 Si transmission has the following ratios, which are different than the 86 and later Si
1: 3.30
2: 1.99
3: 1.35
4: 1.00
5: .79
FD: 4.428
According to the MPH calculator (spicerparts.com), that will have a 42 mph second gear and a 62 mph 3rd gear. While most people like to autocross in 2nd, I think, if those ratios are correct, I can spend most of my time in 3rd with maybe an occasional drop to 2nd. While not an ideal solution, it seems like a better solution. I have an 85 Si transmission apart, so I can confirm ratios for that too.
Thoughts?