Euro 6 speed

[Eric]

so I was thinking while bored at work today.

does this logic work?

M50 fits M20 transmission.

M20 then fits M50 transmission

M50 fits S50 transmission

S50 fits a Euro S50 transmission

If M20 can fit an M50 transmission, and an M50 can fit a S50 transmission, then a M20 can fit a S50 transmission, and a euro S50 transmission?

what do you think?

[silversleeper]

There are plenty of times I feel the need for a 6th gear on the highways... this would be great if it worked. Sadly enough though, my budget would never allow it to be so.

[erik325i]

Yes, it should work, but here are some things to think about.

1) The euro 6-speed costs more than the average e30
2) You would have to build a custom tranny bracket to rotate the tranny 10* because of the differences between the m20 and s50
3) You would need a shorter driveshaft. (probably custom because I doubt you'll find one the right length)

-Erik

[FredK]

Nah, you can use an automatic E36 M3 driveshaft, but you'd have to change the center bearing support with an E30 unit.

[jlevie]

If memory serves, 6th gear in a Euro tranny is the pretty much same ration as 5th in a Getrag 260 (0.82 vs 0.81). So all you gain in more lower road speed ratios. I think the driveshaft length is different, so a modified DS would likely be required.

[bumpstop335i]

If you match the diff ratio to the gb, should turn out pretty mean.

I went the other way and went 4spd. Now, I do 60mph @ 3500rpm. not good with a 3.46 diff. I have just purchased the (new to me) 2.79 crown and pinion gears to make more use of the torque i have.

[xLibelle]

this is crazy enough for me to try. i'll have my people get on with finding me a tranny a sap

[golde30]

so I was thinking while bored at work today.

does this logic work?

M50 fits M20 transmission.

M20 then fits M50 transmission

M50 fits S50 transmission

S50 fits a Euro S50 transmission

If M20 can fit an M50 transmission, and an M50 can fit a S50 transmission, then a M20 can fit a S50 transmission, and a euro S50 transmission?

what do you think?

transitive property applied to e30's eh? nice.

[Eric]

transitive property applied to e30's eh? nice.

better than the chip+intake+exhaust=50 horsepower calculator right?

so for more thinking.

6 speed is longer than the 5 speed.

325ix requires a shorter driveshaft due to the transfer case...hmmm.

rotating the tranny mounts 10 degrees:

how do normal S50 conversion guys do it?

lower the diff ratio that the normal 6 speed cars have should provide nice cruise speed. not concerned about top speed, 240kph in an E30 is scary enough!

[xLibelle]

[OT]lol, damn you eric, you live 30 minutes from the ring... come join us next weekend... and bring an extra car for me[/OT]

[Eric]

your going to be here when?

I can this weekend but not the next.

I'll be in DCU's on the 19th : (

[xLibelle]

oh [/end offtopic]

[92 mtechnic cabrio]

so I was thinking while bored at work today.

does this logic work?

M50 fits M20 transmission.

M20 then fits M50 transmission

M50 fits S50 transmission

S50 fits a Euro S50 transmission

If M20 can fit an M50 transmission, and an M50 can fit a S50 transmission, then a M20 can fit a S50 transmission, and a euro S50 transmission?

what do you think?

I've thought the same logic over and over.

[Bmjpv]

To you techs that know the e30 combo that work with 24v swaps. My 24v,95zf,and 3:25 runs too high of rpms at cruise. Aprox 4k at 70mph, I love the pull the car has threw the gears but I need better cruising rpm. The next rear gearing is ,what 2:93? So 2:93 and a 6 speed?? What works?? thanks joe