Is there a demand for diff ratios?

[2sly4u]

Hi guys

I'm just curious. Is there a demand for diff ratios? If so, which ratios would you guys be interested in?

 

[ChrisBrand]

3.46 or 3.38

 

[Kish2604]

LSD solutions for e46 and e90 please...

 

[2sly4u]

3.46 or 3.38

Small unit? I have a 3.46 in a small unit

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LSD solutions for e46 and e90 please...

Only options are to fit an E46 M3 suspension into the E46 and a E90/2 M3 suspension into the E90. Else there's a place in Durbs who does LSD conversions for around 16k. Transaxle Gearbox and Diff. 031 705 4517

 

[ChrisBrand]

3.46 or 3.38

Small unit? I have a 3.46 in a small unit

---

LSD solutions for e46 and e90 please...

Only options are to fit an E46 M3 suspension into the E46 and a E90/2 M3 suspension into the E90. Else there's a place in Durbs who does LSD conversions for around 16k. Transaxle Gearbox and Diff. 031 705 4517

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Out of which car did the 3.46 come?

 

[2sly4u]

3.46 or 3.38

Small unit? I have a 3.46 in a small unit

---

LSD solutions for e46 and e90 please...

Only options are to fit an E46 M3 suspension into the E46 and a E90/2 M3 suspension into the E90. Else there's a place in Durbs who does LSD conversions for around 16k. Transaxle Gearbox and Diff. 031 705 4517

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Out of which car did the 3.46 come?

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E46 325 Auto

 

[Nikhil]

3.46 or 3.38

Small unit? I have a 3.46 in a small unit

---

LSD solutions for e46 and e90 please...

Only options are to fit an E46 M3 suspension into the E46 and a E90/2 M3 suspension into the E90. Else there's a place in Durbs who does LSD conversions for around 16k. Transaxle Gearbox and Diff. 031 705 4517

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Out of which car did the 3.46 come?

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E36 325

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E36 325i is 3,15 ratio

 

[2sly4u]

My apology. I edited the above post. It is an E46 325 Auto.

 

[ChrisBrand]

I think it should fit my car. Let me just make sure and i will let you know. Not sure if the e46 328i has a "small unit" diff.

 

[2sly4u]

I think it should fit my car. Let me just make sure and i will let you know. Not sure if the e46 328i has a "small unit" diff.

If you have an E46 328i then it will fit. It is only the E46 M3 and the E36 4-Door M3 that has the big unit. But you're welcome to do further analysis :thumbs:

 

[4PipeR]

Yup 3.91 for e46 M3

 

[ChrisBrand]

I think it should fit my car. Let me just make sure and i will let you know. Not sure if the e46 328i has a "small unit" diff.

If you have an E46 328i then it will fit. It is only the E46 M3 and the E36 4-Door M3 that has the big unit. But you're welcome to do further analysis :thumbs:

You have pm

 

[2sly4u]

Yup 3.91 for e46 M3

I'm looking out for the 3.91. 2 guys asked me already. As soon as I get 3.91's then I will post it, however I will let those guys know. If not I will contact you.

 

[4PipeR]

Yup 3.91 for e46 M3

I'm looking out for the 3.91. 2 guys asked me already. As soon as I get 3.91's then I will post it, however I will let those guys know. If not I will contact you.

Cool thanks !:thumbs:

 

[CliftonH]

Just a question to us guys who don't know about diff,
What options would there be for e90 320 diesel,

 

[2sly4u]

Just a question to us guys who don't know about diff,
What options would there be for e90 320 diesel,

A diff ratio can either increase or decrease your rpm. The examples below are for petrol cars

Example 1: A 4.11 diff ratio
- This allows you to accelerate quick through your gears
- RPM in 5th gear at 120km/h would be on 3300rpm
- Top speed 215km/h
- These diff ratios are not ideal for fuel economy

Example 2: A 3.15 diff ratio
- This allows a drag in every gear, very sluggish
- RPM in 5th gear st 120km/h would be on 2300rpm
- Top speed 250km/h +. The guys who builds top-end BMW M3's usually use a 3.15 or a 2.98 ratio which allows them to run speeds of 320km+

The ideal ratio which one will go for is a 3.64. The ratios are as follows:
2.98, 315 - Very long
3.46, 364, 3.72 - The in between ratio, depending on your car and Mods
3.91, 4.11- Quick acceleration through gears
4.44 - Extremely quick acceleration through gears

I hope this helps

 

[netercol]

e90 320d has a 2.56 diff ratio , top speed in top gear around 227km/h, max torque 1900-2700 rpm

a 4.11 diff in a e90 diesel manual would give a topspeed of around 150km/h

a 3.15 diff in a e90 diesel manual would give a topspeed of around 180km/h

 

[DieselFan]

LSD for e46. There's also Quaife but they are expensive.

 

[Coupe Turbo GP]

3.64 for an e36 M3 large case

 

[AndreasSA]

Maybe this is helping you too figure some data out, its from a german m-club:


http://www.m-forum.de/kalkulator/getriebe/index.html

I think its self explanatory....but in case of help needed I can translate and explain...