BMW Transmissions on SR20's

[RalliartRsX]

d9m, In that case, then you pretty much have all the hard parts covered. Driveshaft is easy.

As far as clutch dics are concerned, outside of input spline count and overall diameter, you will also have to determine the individual disc thicknesses, puck placement, etc. to determine if they can indeed be swapped. Chances are not on my first hunch.

As far as the SMg box is concerned, there is whole lot more to the SMg gearbox than paddle shifters, some mounts, etc. You need an ECU for SMG logic control. Most standalone ECUs being used by the Zilvia community do not support such an endeavor. And that's only the beginning of the extensive electronics that are involved with integrating a SMG into any chassis. EG. (not necessarily the SMG but similar transmission). They need wheel angle, TPS, brake pressure and Engine temp to determine shift parameters (timing of shift or to not shift at all, shift lockout, aggressiveness, etc). Its a fairly complex system.

[d9m13n]

Originally Posted by RalliartRsX

As far as the SMg box is concerned, there is whole lot more to the SMg gearbox than paddle shifters, some mounts, etc. You need an ECU for SMG logic control. Most standalone ECUs being used by the Zilvia community do not support such an endeavor. And that's only the beginning of the extensive electronics that are involved with integrating a SMG into any chassis. EG. (not necessarily the SMG but similar transmission). They need wheel angle, TPS, brake pressure and Engine temp to determine shift parameters (timing of shift or to not shift at all, shift lockout, aggressiveness, etc). Its a fairly complex system.

Theres definitely a lot to it, https://www.bimmerscan.com/bmw-e46-smg/ This site actually outlines every single aspect of the electronics the box needs to function. However, the only reason I even deem it a possibility is the fact that theres a shop in the UK that successfully runs the later e90 series DCT box on 2jzs in supras. http://www.garagewhifbitz.co.uk/news...on-conversion/
While this im sure has a ton of propriety programming (not to mention the $4k ecu) it should in theory be simpler with the SMG. Computer tomfoolery to set parameters not dependent on sensors/can communications to only use the most basic shifting and manual control possible? Just spitballing here, but it seems with the right ecu and computer wizardry it wouldnt be so far fetched...

[gills]

The CD009 is more like 130+ lbs without the shifter assembly. The 5 speed ZF is 82lbs with the shifter. Just about a 50lbs weight savings. It's not insignificant and the ZF doesn't have synchros issues to boot.

I've weighed both with a very accurate load cell, but only have a pic of the CD009 being weighed

CD009


Keep in mind that those ZF transmissions were generally paired with taller final drive ratios compared to Nissan's so don't forget to take that into account.

As for everything else, measure twice, cut once so to speak.