1st gear = 20 mph?

[bvans]

Hey guys,

So I've noticed first gear in my Integra goes by pretty fast, I only get up to about 20ish mph in first gear
WOT is about 20 with vtec engaging, casual driving I probably get to like 10 mph...

Whats up with this?
I have a '95 integra ls w/ b18c1 swap
skunk 2 cams and gears, fuel pressure regulator, intake manifold, cold air intake, exhaust..

 

[mjones73]

If you have the GSR trans, it's geared higher therefore you're shifting faster...

Are you saying you're hitting 20MPH in 1st at 4400 when VTEC engages or at the 8000 RPM redline? I never really paid attention to how fast mine can get up to in 1st gear, I usually shift around 3000 with normal driving.

 

[jcrabb13]

ya, im around the same in a 97 b18c1

 

[bvans]

ya i noticed that, rpm is always half the mph.. precisely 4k at 80 mph

do any of you run gsr trannys? i'm not a racer or anything but I'd love to have some lower gearing I mean damn haha whats a good transmission to be running? LS?

 

[Cripton805]

Hey guys,

So I've noticed first gear in my Integra goes by pretty fast, I only get up to about 20ish mph in first gear
WOT is about 20 with vtec engaging, casual driving I probably get to like 10 mph...

Whats up with this?
I have a '95 integra ls w/ b18c1 swap
skunk 2 cams and gears, fuel pressure regulator, intake manifold, cold air intake, exhaust..

I have the original manual. The recommended shift points are.
B18C1 & stock tranny.

2nd. 14MPH
3rd. 25MPH
4th. 40MPH
5th. 49MPH

Maximum Speeds
1) 38MPH
2) 65MPH
3) 90MPH
4) 119MPH
5th TOP Speed

If this helped anyone please +rep
Thanks

Maximum speeds on B18Bs and their stock tranny is actually less than a GSR and their stock tranny due to the engines redline.
Putting a GSR or B16 tranny on a B18B is MAJOR overkill. Because you get to 6-7k a hella lot quicker than you would on a GSR.

 

[96GSRteg]

i do believe first gear on a gsr trans gets up to about 36 mph in first. I have never really done that though, I normally shift early even if im getting on it. Otherwise i shift below 3k if im driving around town.

 

[ben h]

dam thats low mph for gears lol
i have a ls tranny
mines
1st 30
2nd 60
3rd 80
and above aint paid attention

 

[96GSRteg]

cripton beat me to it! and normally if im cruising at 40 im in 5th.

 

[dc2GS-R]

All these mathematical data points assume:
A) You have a stock GSR transmission
B) You have a stock GSR final drive
C) You have stock sized (195/55-15) tires

So I've noticed first gear in my Integra goes by pretty fast, I only get up to about 20ish mph in first gear
WOT is about 20 with vtec engaging, casual driving I probably get to like 10 mph...

20mph at redline in first gear? Or at VTEC engagement. For a stock GSR, you should be at 22mph at 4400 rpm, when VTEC engages.

First gear, at 8000 rpms you should be doing 39mph.

ya i noticed that, rpm is always half the mph.. precisely 4k at 80 mph

That isn't correct. It all depends on how fast you are going and what gear you are in.

But you are correct about your speed you listed. A stock GSR should be runing 81mph at 4000rpm in 5th gear.

 

[dc2GS-R]

Here is how it breaks down mathematically for G3 Integras w/ 195/55-15 tires and stock transmissions and final drives

Stock LS @ 6800 rpm:
1st: 34
2nd: 59
3rd: 88
4th: 115
5th: 156

Stock GSR @ 8100rpm:
1st: 40
2nd: 68
3rd: 94
4th: 124
5th: 163

Stock Type R @ 8400rpm:
1st: 41
2nd: 63
3rd: 91
4th: 120
5th: 157

 

[bvans]

meant in 5th gear the rpms are half the speed.. 2500 rpm at 50 mph
20 mph at around 8k rpm in first, i've never redlined it idk what the ecu is tuned at or what but I've gotten the rpms really high and never heard a redline or limiter hit so i dont wanna blow my engine.. vtec engages at 5k rpm

i have 195/50/15 tires

 

[dc2GS-R]

meant in 5th gear the rpms are half the speed.. 2500 rpm at 50 mph
20 mph at around 8k rpm in first, i've never redlined it idk what the ecu is tuned at or what but I've gotten the rpms really high and never heard a redline or limiter hit so i dont wanna blow my engine.. vtec engages at 5k rpm

i have 195/50/15 tires

Yes, that is true about a stock GSR drivetrain in 5th gear. 1k = 20mph, 2k = 40mph, 3k = 60mph, 4k = 81mph and so on. It is still close with 195/50-15 instead. You just progressively get about 1/2mph slower per 1K rpm than with 195/55.

But with a stock GSR drivetrain and 195/50-15, at 8k rpm in 1st, you should be doing 38mph.

 

[dc2GS-R]

Here, feel free to benefit from my boredom. Attached is spreadsheet that will calculate speed for you. Just plug in the numbers.

 

[96GSRteg]

Here, feel free to benefit from my boredom. Attached is spreadsheet that will calculate speed for you. Just plug in the numbers.

this is pretty awesome! can you unprotect it or give the password? I just want to add the gear specs in the other cells so its easier to reference. I got them from here: http://www.itrsport.com/specifications.html

if not its no biggie.

nvm i figured it out.

 

[dc2GS-R]

I'm pretty sure all of this information depends on your tire/wheel size as well. So, stock #'s are always going to be incorrect unless you are putting tires that are identical to the stock ones on your car coupled with the stock rims.

Of course it does. That is why, in all of my posts, I specified tire and wheel size. That is also why my spreadsheets allow for input of different sizes so you can calculate any scenario you want.


More detailed spreadsheet attached!

That is about all the detail I will go in to. Here's the formula:

((((((Sidewall Ratio/100)*Tire Width)/25.4)*2)+rim diameter)*rpm)/((gear ratio*final drive)*336)