I decided to do the 24v swap. My build tread.

[sohc12vm20]

NO! lol. that nipple wrenches right out. you just rethread the temp sensor. ill see if i can dig that up. wish i book marked this all for ya. LoL..
I'm glad I asked! Perfect, so I wench it out, rethread T/S and call it a day for that:D!

and nope, with e32 booster it bolted right to the pedal. IX booster also just needed some adjusting if you go that route but no chipping threading or welding was needed for me with either setup.

Tomorrow Pick in Pull is half off, if this is the case I rather go this route!!
All e32 boosters the same? I see quite a few e32 750's and 740's. I'll pick one up if its less modding than 320i:D. Also I very much appreciate all the help.

[Unearth078]

i couldnt verify if they were all the same to be honest. it seems like the one to get was 750. all i know is if theyre cheap grab two and i may buy one off of you! the only reason im on here and not finishing another swap is my back is in shambles.

[sohc12vm20]

i couldnt verify if they were all the same to be honest. it seems like the one to get was 750. all i know is if theyre cheap grab two and i may buy one off of you! the only reason im on here and not finishing another swap is my back is in shambles.

That sucks, back pain blows, however your down time is going to a worthy cause;). Also, Yes will do I will pick up two or so. Either way its worth it if I have an extra one if you dont use it.

[samiam3356]

die Part # 55851 at NAPA

[Unearth078]

ps, if it's e32 and the master cylinder has "25" on it, that *should* be the right master, as for the booster, I'm not 100% as to verify I've seen it fo as either 740 or 750.

[AndrewK]

The booster you want should be from an E30 325iX or an E32 735i/735iL. They are identical. This part was used on the 735 up until 3/90 production so you need to verify this if getting it from a junkyard. I used one off of a 735i matched up with a 25mm master cylinder from a 1989 535i.

I also enlarged the holes in the firewall as shown in the post above and didn't use the spacer tube between the booster and firewall. By doing this I was able to mount everything far enough back that I didn't need to use a remote brake fluid reservoir. However, as I discovered, the fluid reservoir from the 535i master cylinder will not clear the intake elbow. You will need the E30 325ix one that has the top corner angled off for clearance.

If you mount directly to the firewall without the spacer tube you WILL need to shorten the rod. I cut and re-threaded mine.

[Wanganstyle]

Yeah, didn't want to have to fight someone at a meet for saying my engine wasn't an s52. lol

hahaha. i was opposite mentality on my s52 swap :P

[sohc12vm20]

Some parts came in:D



So im thinking wrong booster 89 735.



Thanks. i might pick up a 78 320 BB. is that better?

[sohc12vm20]

The booster you want should be from an E30 325iX or an E32 735i/735iL. They are identical. This part was used on the 735 up until 3/90 production so you need to verify this if getting it from a junkyard. I used one off of a 735i matched up with a 25mm master cylinder from a 1989 535i.

I also enlarged the holes in the firewall as shown in the post above and didn't use the spacer tube between the booster and firewall. By doing this I was able to mount everything far enough back that I didn't need to use a remote brake fluid reservoir. However, as I discovered, the fluid reservoir from the 535i master cylinder will not clear the intake elbow. You will need the E30 325ix one that has the top corner angled off for clearance.

If you mount directly to the firewall without the spacer tube you WILL need to shorten the rod. I cut and re-threaded mine.

So if i dont use a spacer, i'll need to mod the rod? if i use a spacer i'll leave the rod alone and just use a 535i M/C and e30ix fluid reservoir? wat spacer is this that you mention? where would I get one? is it the sparcer already on the BB(e32)? I have a chance with a 78 320i BB.. would this be a better route and use my stock M/C. Thanks.

[AndrewK]

That's the correct booster in your picture. Better than the 320 booster because it's a double chamber and provides more boost. The spacer is the piece between the booster and firewall. If you take that off and mount direct to the firewall like a few posts up you will need to shorten the rod to accommodate. I compared to my stock booster to get the length the same.

Check that master cylinder for a 25 stamped on it or research the part number. You might already have a 25mm. Even if it's not, that setup you have right there will work perfectly fine as is. A 25mm master cylinder just gives a more solid feel to the pedal.

[sohc12vm20]

That's the correct booster in your picture. Better than the 320 booster because it's a double chamber and provides more boost. The spacer is the piece between the booster and firewall. If you take that off and mount direct to the firewall like a few posts up you will need to shorten the rod to accommodate. I compared to my stock booster to get the length the same.

Check that master cylinder for a 25 stamped on it or research the part number. You might already have a 25mm. Even if it's not, that setup you have right there will work perfectly fine as is. A 25mm master cylinder just gives a more solid feel to the pedal.

ok thanks. so if i leave it alone i'll have have trouble clearing the intake boot, and if I take the spacer off, i'll need to mod the rod correct? Also do i swap the forks? thanks

[AndrewK]

so if i leave it alone i'll have have trouble clearing the intake boot

The brake fluid reservoir won't clear and you will need to run a remote reservoir. Not the end of the world, just not as clean looking. Most folks use the reservoir from a BMW 2002. Do a search here for all the part numbers. You need the reservoir, hose, two plastic elbows, two rubber grommets, and you will need to fabricate some sort of bracket to mount to.

if I take the spacer off, i'll need to mod the rod correct?

Correct.

Also do i swap the forks?

Yes. Whether you remove the spacer tube or not, you need to reuse the original fork from your E30. The E32 one is too long.

[sohc12vm20]

Finally removed the M20

My slow but coming along project.. Tomorrow I clean engine bay. I couldn't disconnect D/S so I pulled it out wit everything "noobie" I search but couldn't find anything on how much to shave M20 flywheel.. I've read shave 3mm on e34 oil pan but that's all I've seen. Can anyone who's running M20 FW let me know what they shaved. e32 BB is done and I pick it up tomorrow, so I hope to have s52 in at some point next week or so. I need to test fit it so i can make custom Transmission bracket for G260. Thanks.







Do you guys think this is worth anything... Only 89K on it. I might store it for wifey's e30.