I just whipped this up using Excel, and I thought I'd post it because it might be interesting and/or of use to someone on here.

 

Looks good. could you add a line at 3400 RPM to show VTEC... maybe vertical gridlines for the speed too?

 

Awesome thanks! Sort of looking for this as I await my MT. Does anyone have the figures for the AT just to compare?

 

HAHAAAHAHAaaa....thats soooo funny, you put the MPHx10 but put the RPMS as is. I kept reading it funny

 

This is pretty close to the AT Sport. You CAN'T start at 3rd, 4th, and 5th gears at 0mph with the AT because Honda put minimum speed limitations which I think is listed on the manual.

 

Sorry it looks like crap...I couldn't figure out how to put this in a table and it took out all of my spacing.

I did something similar in Excel and here are the MPH for each RPM with the MT. This assumes that you're using 195/55 R15 tires.

1st 2nd 3rd 4th 5th
1000 4.70 8.70 12.31 16.77 21.49
1500 7.05 13.05 18.47 25.15 32.23
2000 9.40 17.40 24.63 33.54 42.97
2500 11.75 21.74 30.78 41.92 53.72
3000 14.09 26.09 36.94 50.30 64.46
3400 15.97 29.57 41.86 57.01 73.05
3500 16.44 30.44 43.09 58.69 75.20
4000 18.79 34.79 49.25 67.07 85.94
4500 21.14 39.14 55.41 75.46 96.69
5000 23.49 43.49 61.56 83.84 107.43
5500 25.84 47.84 67.72 92.22 118.17
6000 28.19 52.19 73.88 100.61 128.92
6500 30.54 56.54 80.03 108.99 139.66

In comparison, here is the same spreadsheet for the AT
1st 2nd 3rd 4th 5th
1000 5.11 9.11 14.34 20.24 27.82
1500 7.66 13.67 21.51 30.36 41.73
2000 10.21 18.23 28.68 40.48 55.64
2500 12.77 22.78 35.85 50.60 69.55
3000 15.32 27.34 43.02 60.72 83.46
3400 17.37 30.99 48.76 68.82 94.59
3500 17.88 31.90 50.19 70.84 97.38
4000 20.43 36.45 57.36 80.96 111.29
4500 22.98 41.01 64.53 91.08 125.20
5000 25.54 45.57 71.71 101.20 139.11
5500 28.09 50.13 78.88 111.32 153.02
6000 30.64 54.68 86.05 121.44 166.93
6500 33.20 59.24 93.22 131.56 180.84

 

ok, so in regards to gear ratios... i got a couple of n00b questions; what does a final drive do exactly? anything for the ratios? what's the difference between that and a lsd or how are they related? aaaaand... how does a fly wheel fit into the equation if at all in relation to all this?

 

Excellent info at this link:

Howstuffworks "Open Differentials"

Explains what the final drive ratio is, and the difference between open diff and LSD. Hope that helps.

 

Thanks for the replies! I added vertical lines, and a line at 3400 RPM to indicate the VTEC engagement point. (VTEC kicks in yo! ) I know using MPHx10 is sort of weird, but that's how the program set up the chart. Interestingly enough, it seems that the difference between 1st and 2nd gears is great enough that if you shift at redline, you'll end up just above the VTEC engagement point. This makes me wonder how much of a performance gain one could get from raising the redline to 6800-7000 RPM.

 

i wish 1 and 2 were a little closer together and 2 and 3 alittle farther
apart on the 5MT.

 

dude... if 1 and 2 were any closer you wouldn't need 1. but yeah, the way it's set up out the box, 2 is almost uneccessary... barely. cuz 3 ends up being the norm for turning corners. it just revs too high if i try 2, no matter if i'm comin in hard or soft.

 

umm... unfortunately, no. i understand now what the final drive is but like, i don't understand how it supposedly would help my fit. the lsd went straight over my head (maybe i just need to look over it a few more times) *edit*[ok, i think i get how the lsd works now but not sure about what it would help (does the fit even have one?)*end* and no mention of fly wheels or pulleys and stuff like that...

 

Final drive...
lower final drive ratio: longer gears, overall lower RPM, higher top speed. Better cruising fuel economy
higher final drive ratio: shortens gears, overall higher RPM, lower top speed, worse cruising fuel economy.
The 5MTs are considered to have a way too high final drive compared to other small cars, so you have to stick to 60-65 or fuel economy takes a hit.

ligher flywheel and underdrive pulleys let the engine rev more freely

LSD was pretty self explanatory, but wouldnt affect performance, just handling and cornering grip.

 

that does help, thansk! so would it be safe to assume that all the aftermarket final drives availabe lower the stock ratios? (they'd probably advertise the fact once i look them up, huh?) and are they universal or designed specifically for a model? ...and if you could (or anyone for that matter) briefly explain how revving more freely is more beneficial or what that means? also, one last thing, (again, open to anyone with the knowledge and/or experience) how much of a difference would you or i immediately notice that an lsd actually provides an improved feel when driving?

 

The aftermarket final drives I've seen make the stock ratios higher (the gears are "shorter") so you would accelerate faster. Of course, this means your engine is running at a higher RPM for a given MPH.

Revving more freely is beneficial because that means your engine doesn't have as much resistance to spinning and can spin up faster.

Can't tell you about the lsd, though.

 

Without a limited slip differential, the engine power will go to the wheel with the least resistance. Imagine going around a sharp right turn, and getting on the throttle in the middle of that turn. Due to the forces involved in turning, weight will be transferred to the left side of the car. The left front wheel will have more weight on it than the right wheel. More power will go to the right wheel, and it may cause the wheel to start spinning. With a LSD, power will go to both wheels in a turn, allowing better acceleration and vehicle control.

 

Nice link, thanks.

 

thansk all! from what i gather, i don't want any of that crap.

 

Vtec DOESN'T engage at 3400. Just read the Vtec light post.

 

AT sport has noticeably lower rpms at highway speeds -about 2700 at 70mph.
Weird because with past cars I have owned it was just the opposite.