I'm considering changing my Prelude H22a tranny to an Accord Type-R H22a tranny here's the comparison:

Well here is my direct comparison of the type-r to what I have now:

Prelude - ATR
3.307 - 3.285
1.950 - 2.090
1.360 - 1.481
1.071 - 1.071
0.870 - 0.870
Final 4.266 - 4.266

So first is very similar, but it's 2nd and 3rd where you see the big jump! Is this a no brainer? This is simply a better tranny no? I am moving my powerband up a little higher, and I was thinking the shorter 2nd and 3rd would be better to get me into the high revs faster....

Any thoughts? Anyone have any links to some rpm and speed calculators for ratios?

 

Hybrid the sucker.

Keep the prelude 1st and get the accord 2nd and 3rd.

 

true, but 3.307 to 3.85 isn't that much slower...

but I take it you like the 2-3?

 

YEah I like the 2-3. It would be worth it also considering the Type R comes with an LSD.

 

What is your powerband going to look like and what will this motor's redline be? I.e., are you looking to stay between say 6000-8000 RPM during shifts or what?

 

yes that is the desire...

Regular H22a crank will make peak torque at 5500 and peak hp at 6800

My F20B crank will 'probably' make peak torque at 6500 and peak hp at 7500-8000 redline will be 8500


[Modified by satan_srv, 4:38 PM 1/15/2003]

 

Looking forward to it..I appreciate it dude!

 

calculations for the Prelude tranny w/ a 23.5" tire -
1st (3.307): 42 mph @ 8500 RPM
2nd (1.95): 42-71 mph ... 5000-8500 RRM
3rd (1.36): 71-102 mph ... 5900-8500 RPM
4th (1.071): 102-130 mph ... 6700-8500 RPM
5th (0.87): 130-160 mph ... 6900-8500 RPM
cruise @ 65 mph in 5th: 3450 RPM

calculations for the ATR tranny w/ a 23.5" tire -
1st (3.285): 42 mph @ 8500 RPM
2nd (2.09): 42-67 mph ... 5350-8500 RRM
3rd (1.481): 67-94 mph ... 6050-8500 RPM
4th (1.071): 94-130 mph ... 6150-8500 RPM
5th (0.87): 130-160 mph ... 6900-8500 RPM
cruise @ 65 mph in 5th: 3450 RPM

Now that your RPM limit is so much higher, you would see some good benefit from moving to a numerically higher final drive. For example, using a 4.785 final w/ the ATR tranny (definitely the better of the two, though not optimal):

4.785 final
1st (3.285): 38 mph @ 8500 RPM
2nd (2.09): 38-59 mph ... 5450-8500 RRM
3rd (1.481): 59-84 mph ... 6000-8500 RPM
4th (1.071): 84-116 mph ... 6150-8500 RPM
5th (0.87): 116-143 mph ... 6900-8500 RPM
cruise @ 65 mph in 5th: 3850 RPM

 

Can't offer a lot of help, but maybe you can use this:

http://home.attbi.com/~gprause/Trans.xls

 

Ooooh that looks nice! I'll have to look into that, that goes through the gears pretty quick!

 

FD-P47 Ring/Pinion Set, Prelude (4.7143 ratio) $1250.00

Prodrive I think is one of the only companies that makes a FD for the prelude...damn that's some expensive ****!

 

Joel:

Houseman Autosport also makes a final drive for the H22A. It's also a 4.714 FD. This one costs $1650.00.

 

if you got the money for the tranny, I think that its a no brainer, as for the final drive, it will help a little bit, but not near worth the price.

 

the tranny would probably cost more than that, considering it's exclusivity. And at any rate, a 10% shorter final drive will make a bigger impact on overall performance than the slightly better spaced 1-3 of the ATR tranny. I'd opt for the new final gears if the prices are about the same.

 

My other contributing factors are the low mileage of the ATR and the low maintenance helical lsd. But yeah it's rare...

 

How much are you getting the tranny for? From who?

 

n'vamind...just read the entire post



[Modified by dsludefosho, 11:26 AM 1/28/2003]

 

How do you find a 4.785 final gear set to install in a H22A tranny?

Does anyone know if you can pull the 4.785 gear set out of a H22A automatic tranny?

 

prodrive sells em...not sure bout the auto tranny thing.

 

that's what I was thinking. keep the 1st and add the accord 2nd and 3rd.