BMW Differential

[m3f_Realhotguy_80d06ef0ad]

I was wondering if a 4.10 differential is possible on an M3. If it is is there any websites you guys know of that sells them?

[m3f_SG_M3_d1201712b5]

yes it is possibe, but thats very very high. www.diffsonline.com will build you a diff. Most 5 speed e36's use a 3.46, while the 6 speed guys go 3.64 or 3.91

[m3f_Realhotguy_80d06ef0ad]

So what would happen if i get 4.10 on a stock 98' m3? Would it make it bad? If yes what would you recommend?

[m3f_SG_M3_d1201712b5]

4.10's are just too short for our cars. A 3.46 with 40% lock up is a great diff.

[m3f_Drifter_23d8df4bc6]

7000 RPM -- 30.0 -- 50.4 -- 76.1 -- 104.1 -- 127.0 --- MPH

1st 2nd 3rd 4th 5th



thats with a 3.91 diff. now with 4.10 i think your max speed wouldn't be any higher then 110.

[m3f_Realhotguy_80d06ef0ad]

So i should keep the diff. stock?

[m3f_Realhotguy_80d06ef0ad]

I'm looking to put $1100 into my car and i don't know what to spend it on. I already have everything suspension-strut braces,sway bars, lowering springs, new shocks. I also have clear corner lights,clear sidemarkers, and euro taillights. Just got the new Michellin tires, the ps2. I also have a short shifter. I have nothing performance in my car. What do you think i should put the $1100 into, performance wise?

[m3f_Realhotguy_80d06ef0ad]

Oh and any suggestions on what websites to find the stuff. Sorry for triple posting.

[m3f_SG_M3_d1201712b5]

For performance, i'd go with the Jim C./Eurosport cam kit and your choice of exhaust.



www.sharked.com or www.turnermotorsports.com sells the cam kit



Supersprint, AA, UUC, and Stromung all make quality exhausts.



I would also consider doing some track events, a DE will make you faster than any engine mod.

[m3f_Realhotguy_80d06ef0ad]

Whats a de?

[m3f_park828_94ead836d3]

driver education

[m3f_mbanks21]

With a 4.10 you wouldnt have a 1st or probably 2nd gear. And cruising on the highway in 5th your RPM's would be WAY high. Get either a 3.46 or a 3.64.

[m3f_dapper83_ac01dd8204]

I went with a 3.73 and that is plenty high if i could do it again i would go with a 3.46.. But the performance improvement is pretty nice...Diffs are a nice upgrade cams will cost you more then 1100 when all said and done. www.bmpd.com offers diffs and so does turnermotorsports



John-

[m3f_astan100_7ef66fbe89]

How practical do you want your car to be? That's the big question here. You can probably do fine with some kind of upgraded diff, but nothing silly like 4.10.



You are going to need 3 gears to hit 60 with most upgraded diffs I'd think and our cars are already revving so high on the highway.



If it is a daily driven car, I would just leave the diff as is. Save the 1200 towards something better. If you really want performance, don't bother with the exhaust...it won't net much. If you want the sound and the bling bling ( ) of having an exhaust, go for it.



An intake isn't a bad idea. To get the most out of it, go for a true CAI design where it gets the air from your brake ducts.



We have a FAQ on intakes. I think they give you the most hp for the buck, but it still won't make enormous differences.

[m3f_95RogueM3]

driver education



Actually its Driving Event, I believe.



-Richard