Getting ready for 24v swap, have some questions

[Bahaa425]

I've always wanted an e30 and now have the funds to get one, plus I've got the e36 and can't really do anything with it because it was totaled so the swap is at my finger tips! But thanks for all the help I want it to work out

[ThatOneEuroE30]

I've been contemplating this swap again aswell. Picked up a new e30 and m20 isn't enough

[Nick_S]

I was in your same situation. I had read everything I thought I could but still didn't feel like I had a concise answer. It's all out there and will make even more sense once you dive into it.

[Bahaa425]

Please do more reading. This is all readily available in multiple places. e28 motor mounts e21 trans mounts with cups or something polly. I like rubber as the ears on the trans are fragile as it is. E36 alloy arms.

I'm sorry if it seems like I haven't been doing my research, I have I promise. I'm currently on page 48 of http://www.r3vlimited.com/board/show...=45442&page=48

I'm just trying to get my options and details correct, I don't mean to be annoying!

[justin_l_]

Please do more reading. This is all readily available in multiple places. e28 motor mounts e21 trans mounts with cups or something polly. I like rubber as the ears on the trans are fragile as it is. E36 alloy arms.

[Bahaa425]

I'm using a zf trans, e36 4 bolt driveshaft and it works fine. I said zf trans not g260

Sweet! then i dont have to worry about bending the shifter linkage, and the offset trans brace. People use 525 green tranny mounts yea? what about engine, e30 work ok with the e36 arms?

[justin_l_]

This is not true, the ZF has a larger bolt circle for the driveshaft and will not work with e30 driveshafts. The G260 has a smaller bolt circle.

I'm using a zf trans, e36 4 bolt driveshaft and it works fine. I said zf trans not g260

[Bahaa425]

so if my calculations are correct(again if I'm wrong please don't yell) if I'm running 225/50r16 with the zf transmission and a 2.93 diff I should be at around 100mph at 3800rpms in 5th, yes? where as with the getrag id be at around 3000? so zf it is hahaha and from what ive read in this http://www.e30tech.com/forum/showthread.php?t=115724
the "Option 2:1996-99 M3 or 328i driveshaft with the 4 bolt rear flange to bolt right up to the e30 diff."

Is this correct or false?

[Bahaa425]

Ok so from what I'm understanding and please don't yell if I'm wrong, if I use the getrag with the m50 and the 2.93 lsd I'll be doing 800 rpms, in 5th, less than if I were to use the zf with the 2.93? Just making sure I understood that correctly.

[GunMetalGrey]

As long as it is the 4 bolt rear flange driveshaft it will bolt up with the zf trans.

This is not true, the ZF has a larger bolt circle for the driveshaft and will not work with e30 driveshafts. The G260 has a smaller bolt circle.

[justin_l_]

As long as it is the 4 bolt rear flange driveshaft it will bolt up with the zf trans.

[Bahaa425]

You can alter cruise rpm by changing the differential. Considering you have an eta your cruising rpm will not be very high so I wouldn't be concerned. If you use the m52 trans you would just bolt up the m52 linkage with no modification.

It will not rev up that much quicker. Research light weight flywheels, there is a point where too light of a flywheel will hurt you. As for what stuff to use, use the starter that matches the flywheel. Power steering pump from 24v motor, lines from e30. Use the e36 rack if you have it.

The e36 diff doesn't bolt up to an e30.

gotcha, i understand the difference in the ratios, i was under the impression that the 96+ drive shaft wont hook up the the 325es 2.93 lsd? also i play to use the m20 flywheel and clutch with the m20 starter. as i undetstand it the e36 rack is better aswell.

[justin_l_]

You can alter cruise rpm by changing the differential. Considering you have an eta your cruising rpm will not be very high so I wouldn't be concerned. If you use the m52 trans you would just bolt up the m52 linkage with no modification.

It will not rev up that much quicker. Research light weight flywheels, there is a point where too light of a flywheel will hurt you. As for what stuff to use, use the starter that matches the flywheel. Power steering pump from 24v motor, lines from e30. Use the e36 rack if you have it.

The e36 diff doesn't bolt up to an e30.

[SmokeE30]

the only issue i have is that the e36 diff is open, id have to swap the diff in with the zf correct or is there a driveline that connects to the e30 diff from the zf?

The 4 bolt style e36 driveshaft from ZF cars fits the e30 and stock diff, or you can use a big guibo style e30 shaft found in later 325e cars so you won't even have to switch the CSB over. Get a LSD diff in the 2.79-3.25 range from an e30 or other medium case car and you will be set

[Poorboyz]

I'm going to be using a g260 with a E30 3.73 LSD and from what I've researched I will be able to use a auto drive shaft from a 96 and up E36.

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