spin_r_g

K I was just wondering a couple of things about trannys. I know that you can use f22/h23 trannys on a h22a engine but you'll fall out of vtec when shifting and your gearing will be different. I'm wondering if it's possible and what would happen if you were to get a hold of a h22a and slap it on a h23a or a f22a. Would it work? What would be the side effects or benifits of it?

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Satan_SRV

You'll rip through your gears faster.

It's a balance, the question is with shorter gears you car accelerates faster, but if it places you in weird spots in your power band it can actually make you slower.

For instance younew shorter gears put you at higher rpms in every gear on ****s, yet your H23 torque peak is much lower...you're not getting full power. However I think an H22a tranny would likely help you.

Right now here is where you end up in each shift assuming a 6500 redline?

Shift points on an H23 with these trannies
-------M2S4--M2F4
1-2 - 3650 - 3833
2-3 - 4620 - 4533
3-4 - 5092 - 5119
4-5 - 5104 - 5280

Top Speed on an H23 with these trannies.
----M2S4-M2F4
1 --- 33 -- 33
2 --- 58 -- 56
3 --- 82 -- 80
4 -- 105 -- 101
5 -- 133 -- 124

Basically from my perspective it looks like you will be faster, becuase in 1-2 you're at 3800 instead which is good because that is right where the H23 torque jumps up rather than being lower. In 2-3 shift you are actually LOWER in the revs than an H23 tranny which is also good becuase you have all that torque you should want to be a little lower to use it. From 3-4 is pretty much the same.

So my overall assessment is your car will pull much harder in 2nd and 3rd. It's likea type-r tranny for the H23 lol

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Joel
Dirty Supra Turbo Hardtop