Diff Ratios

[sinister_rb_s14]

ive got an aussie delivered s14 and im rebuilding the diff ive heard that the diff ratios are like 3.692 or sumthing and thats a really really shit ratio i want to put an 4.1 or 4.3 in it

ive got a spare s13 diff there and the gear ratio labelled on that says 48:11

what is that is that 4.1 or something else im a bit unsure

thanx patrick

[boostn32]

48 teeth on crown wheel

11 teeth on pinion wheel

48/11= 4.36

so your diff ratio is 4.36:1

[sinister_rb_s14]

awesome thanx heaps mate

[boostn32]

no worries, i just need a 4.6 if i can find one.

[Ryno]

ive got an aussie delivered s14 and im rebuilding the diff ive heard that the diff ratios are like 3.692 or sumthing and thats a really really shit ratio i want to put an 4.1 or 4.3 in it

ive got a spare s13 diff there and the gear ratio labelled on that says 48:11

what is that is that 4.1 or something else im a bit unsure

thanx patrick

You may want to do some more research. The 3.692 ratio, is found in the S15 with a 6 speed manual gearbox and not in the S14.

So I'd figure out exactly what you have in your S14, before you start panicking.

[RBceffy25]

I posted this up the other day in another thread.

Maybe we can sticky it?

Nissan diff ratios:

4.900 - C23 Serena SR20DE 4WD Auto

4.636 - C23 Serena SR20DE 4WD Manual, C23 CD20T 4WD

4.375 - R32 RB20DET 4WD, A31 Cerfiro RB20DET 4WD

4.363 - R34 RB25DE 4WD, R34 RB25DE Manual, R34 RB20E, R33 RB25DE 4WD, R33 RB25DET Auto, R33 RB25DE, R32 RB20DET, R32 RB20E,

C35 Laurel RB25DE 4WD Auto, C34 Laurel RB25DE 4WD Auto, C34 Laurel RB25DE Auto, C33 Laurel RB20DE Manual

A31 Cerfiro RB20DET, A31 Cerfiro RB20DE Manual, S13 CA18DET, S13 CA18DE, C23 Serena SR20DE 2WD, C23 Serena CD20T 2WD

4.111 - R34 RB25DET Auto, R33 RB25DET Manual, C35 Laurel RB25DET Auto, C35 Laurel RB20DE Auto, C34 Laurel RB25DET Auto, C34 Laurel RB2

0DE Auto,

S13 SR20DE (ABS),

4.083 - R34 RB25DE Auto, R33 RB20E, R32 RB20E (ABS), C33 Laurel RB20DE Auto, A31 Cerfiro RB20DE Auto,

S15 SR20DE, S14 SR20DET Manual, S14 SR20DE Manual, S13 SR20DET Manual, S13 SR20DE (ABS), S13 SR20DE

3.916 - S13 SR20DET Auto, S14 SR20DET Auto, S15 SR20DET Auto, A31 Cerfiro RB20E. 5 & 6 bolt

3.692 - S14 SR20DET ADM Manual, S15 SR20DET Manual. 5 & 6 bolt

3.583 - R33 RB25DE Auto, C33 Laurel RB20E Auto

* transmissions as stated, if not listed it means they are available in either Manual or Auto.

If anyone can add to this list, either if its ratio or cars, please do so.

Edited September 2, 2010 by RBceffy25

[WARLORD]

quick question is there a big difference in 4.1.1 in a r33 manual diff to a 4.3.1 as i have a kazaa 2-way diff to go in my car for the drags.

thanks

Edited September 5, 2010 by WARLORD

[DVS JEZ]

quick question is there a big difference in 4.1.1 in a r33 manual diff to a 4.3.1 as i have a kazaa 2-way diff to go in my car for the drags.

thanks

4.3 is better for the drags as long as u dont have to change into 5th before crossing the finish line

[WARLORD]

4.3 is better for the drags as long as u dont have to change into 5th before crossing the finish line

cool, i should be ok at 8200rpm

[XKLABA]

quick question is there a big difference in 4.1.1 in a r33 manual diff to a 4.3.1 as i have a kazaa 2-way diff to go in my car for the drags.

thanks

as DVS32R said aslong as you do not need 5th gy the finish line, but the shorter the ratio the better acceration you get but the more likely you are to wheel spin, i have the 4.11.1 in the gtr and on street tyres on low boost it will brake into 4wd wheel spin as it comes on boost in the first 2 gears and the 4.3 would only make that worse

[WARLORD]

it should be ok,350rwk slick up = more fun with a bit of nos to

[WARLORD]

revisiting my last comment 4 years ago

4.3 ratio

shit traction

shit fuel economy

lower mph from 127 to 115

i would recommend for lower powered cars if you want a quicker accelerating car or for drift

im looking for 3.9 or 3.69

has anyone got any expirience with these gears

[XKLABA]

I could have told you that, oh wait I did

We went 3.9s from 4.11s in the BSM car and went faster 2 seconds around EC, they then went 3.55 from a 34 after I stopped going in and that is what was in it for world time attack

Personally with 350rwkws+ I would go the 3.69s, but then that depends how big your horsies are, I know 3.69s are easy to get for the R200 but finding them for the front diff is proving harder to do, I know there is a WRX that has that ratio but which exact model is what I am finding hard to nail down

[WARLORD]

Cool ill be at the 400kw mark with e85 and ill be running nos as well so ill give it a go

[XKLABA]

I have 450+awkw so far and have a OS88 option 2 on its way which I will be putting in the 34 with the stock 3.545 diff ratios, with the standard box and 275/35/19 RS-3s it has traction issues 1st-2nd and most of 3rd lol, fun times

[WARLORD]

so you think 400kw rb25det will be good with 3.69s

[XKLABA]

I think so, realy depends how much torque it makes though, have you got a dyno graph, the more torque you make the better the use you will get for longer diff gears

The biggest issue your going to have with 400kw and rear wheel drive is traction, so anything you can do to add in keeping it will make car faster

[WARLORD]

this is pump gas no nos. plans are 268 cams e85

[XKLABA]

If you leave those cams in and play with retarding the exhaust cam on the dyno I would go 3.69s if you put in the 268 cams then 3.9s

How much NOS are you planning on and what for, get boost or full run

[WARLORD]

Nos For full 50-100 hp ran at 1000 meter events but most of the time just e85 . You think the cams should stay. Interesting

Edited November 18, 2014 by WARLORD