6/83 grey market 323i.. mtech I S50 5-lug

[kronus]

I can't wait to see what you do for you front brakes.

just ordered e46 non-M calipers, hubs and 300x22 rotors...

and a lot of $$$ in gaskets to replace every single one I found while taking the car apart.

[kronus]

aaand looks like I'm going with full e30 m3 stuff on the rear, found a convenient used set. Looks like I'll be at around $1500 for a low-offset 5-lug setup with all new bearings, rotors, lines, and rebuilt calipers. Not bad.

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I'm having a experienced TIG welder friend drop by tonight to check out the various rust damage. The butthole should be all fixed next week.

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I've also been reading a lot about actually making the M106 work, as well as emailing back and forth with some 745i owners. There's several issues.

- the wastegate is a unique, nonserviceable, nonadjustable design that blows open at 9psi.
- the OE (30#) injectors are low-impedance
- the OE ECU, AFM and harness are ancient

There is a fairly common (by the standards of M106 owners at least) process to modify the wastegate to be adjustable to hold higher manifold pressure. It's covered here, but the gist of it is to add a bolt to compress the internal spring for more resistance, and add a nipple to pressurize the upper chamber of the WG for additional resistance. This is a bit more accessible than the $500 Miller wants for a drop-in solution.

The plan, then, I think, is to run a Motronic 1.3 e30 harness and MS2/e in a Motronic ECU box, keeping the stock injectors while getting everything running. I should be able to retrofit some nice 45# injectors later, probably around the same time as getting the intercooler figured out.

Since MS can run via MAP, I should be able to remove or core out the AFM (for appearances), right? I've considered running an Ostrich chip emulator instead, since it does basically the same thing but through Motronic, but I'm concerned about the injector drivers driving low-impedance injectors. Might be able to fix it with some high-wattage resistors, but that's getting into shadetree territory.

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unrelated teaser:

[MR 325]

Yes you can completely remove the AFM with MS. I believe MS can run high or low impedance injectors as well.

Instead of modifying the WG couldn't you just run an adjustable boost controller?

[kronus]

Yes you can completely remove the AFM with MS. I believe MS can run high or low impedance injectors as well.

Instead of modifying the WG couldn't you just run an adjustable boost controller?

Manifold pressure will blow an unmodified WG open at 9psi no matter what... the internal spring's weak.

[Farbin Kaiber]

Can't you weld it shut and run an external?

[kronus]

it is external.

edit, like so:

[Farbin Kaiber]

Nifty, so an adapter and a good WG then? It's like you are already BAR'ed, right?

[kronus]

Nifty, so an adapter and a good WG then? It's like you are already BAR'ed, right?

There is legend of the adapters or plans for them existing, but they're pricey.

And yeah it's like I'm already BAR'd, but not sure how that works for aftermarket WGs.

[kronus]

cut out replacement trunk latch sheetmetal from a junkyard car:



It seem that the way BMW did the body seams on this car is worse than newer e30s - the edges of some spot welded panels are not straight, and were not sealed well. The grinding continues. I had a body shop guy come by and take a look at it, he quoted me a somewhat absurd price.

Also, most of my front brakes are here. They will come together at some point this week. In the meantime I've been driving this..

[e30m3s54turbo]

I want see those front brakes.:popcorn:

[BUDNUNTA]

I'm having a experienced TIG welder friend drop by tonight to check out the various rust damage. The butthole should be all fixed next week.

There is legend of the adapters or plans for them existing, but they're pricey.

problem solved

[Good & Tight]

Your manifold looks a little restrictive..
Awesome build...!

[kronus]

got distracted with making the M3 have a real transmission and work properly for a track day. back at it now. Currently arranging brakes, no real progress on bodywork. I got a set of axle sleeves from Lithuania, putting them on will be an adventure.



Here's a e46 328i front rotor, with an e30 one on top of it. I think it will be a sizeable upgrade. The calipers are a lot beefier, as well.



I got trailing arms from a '91 e30 325i, because mine are the early small-bearing ones. The rear will be e30 M3 standard, the hubs of which fit into regular e30 trailing arms. Here are some m3 rear caliper carrier brackets, pre- and post-sand-blasting. These have seen some shit, but clean up with some effort. The calipers I got with them are getting sent in as cores.



I'll have to play with the master to get a good bias. The rear calipers are 40mm. The front e46 caliper piston diameter is 54mm, while the e32 one is 44mm, so it's possible that an e32 25mm MC and a bias valve will let me get it dialed in.

A neat thing came with some parts from Blunttech:

[Wanganstyle]

For impedance of Injectors a Toyota resistor pack for avalon 6 cylinder will work perfectly; 1998 avalon uses the same resister as a mk4 Supra; played this game on 2JZGTE with J spec brain and usa bigger supra injectors

Just put it in line on the power path pre injectors

Sent from my SAMSUNG-SGH-I337 using Tapatalk

[M-technik-3]

cut out replacement trunk latch sheetmetal from a junkyard car:



It seem that the way BMW did the body seams on this car is worse than newer e30s - the edges of some spot welded panels are not straight, and were not sealed well. The grinding continues. I had a body shop guy come by and take a look at it, he quoted me a somewhat absurd price.

Also, most of my front brakes are here. They will come together at some point this week. In the meantime I've been driving this..

Is that Byzantine?