Finished: M30AFM Conversion (56k Beware)

[Saul325is]

Well here it is, took me a month or so with tuning. I dont have any dyno charts yet. But I am using an M30AFM off of an e34 535i AFM w/an e34 M50 TB to AFM boot.
I am also using 19lb Mustang Injectors. I re-located my ICV and brake booster line(since the e34 M50 boot is bigger and slightly different), so here are some pics.
(Special thanks to Bill for making me a bracket). Any questions or whatever, feel free to ask me. I know, my engine bay is pretty dirty :(.







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-Saul

[KenC]

Can you feel much of a differnce driving around?

[nando]

I didn't know E34s came with M30s?

I still haven't decided if it's worth the trouble of putting mine in for a 3-5hp gain and $50 less in my wallet. :P

[Saul325is]

Can you feel much of a differnce driving around?

Yeah I forgot to add. For some reason it took me a while for my ECU to adapt to my larger injectors. After getting a new fuel filter I felt a very big difference(my fuel filter was extremley clogged).
I noticed out of all a greater throttle response. I also noticed a higher top end gain, and a little more pull on the freeway.
Nothing major at low RPM's, but I am still sure that it bumped it a little.
Also not to mention the LOUD intake noise on between 3.5-5.0rpms. I am going to the Dyno on April 26th, so i'll post some results with my old vs. new AFM.

-Saul

[Super Eta]

I didn't know E34s came with M30s?

I still haven't decided if it's worth the trouble of putting mine in for a 3-5hp gain and $50 less in my wallet. :P

Dont start to cry a river as i might put you on a list of people interested in one as i have one sitting next to me that i bought as just a free time hobby to work on but meh it kinda went sour and i "might" let it go for almost nothing i dont know yet i dont even at this point want to sell it but i will put you on the list. woah i need to take a deep breath.

[Jordan]

Hot air intakes are the coolest.

[Saul325is]

Hot air intakes are the coolest.

Har Har, I am making my own heatshield at the moment, since none of the "aftermarket" heatshields will fit.

-Saul

[Saul325is]

I didn't know E34s came with M30s?

I still haven't decided if it's worth the trouble of putting mine in for a 3-5hp gain and $50 less in my wallet. :P

When doing this conversion, I was looking more into the Top end gain and throttle response. I wasnt really focusing more on the HP gain because I knew it wouldnt be that substationaly high.

-Saul

[e30sd]

I didn't know E34s came with M30s?

e34 535i woot!




m30 bottom end?!?!




i wonder where the hg blew?

[mikeedler]

when you did the conversion, did you use the circuit board from the M20 AFM? just curious. I did the swap with 19# injectors a while back and saw 0 performance gains, but it did definately get about half of the mileage as stock. so I took it of and tossed it. just curious what you think of it, and make sure you check out the crappy mileage your car will get with that.

[rs4pro3]

Nice I installed my 19lb injectors last wednesday and I think the Ecu just finaly got adapted to them yesterday. I tried my m30 AFM but it's going to need the circuit board swap as the car was barely driveable. Supposedly though the newer E34 m30 AFM does not require the circuit board swap, I may have to try that E34 boot as I could not get my boot to strech at all when heated.

[Saul325is]

when you did the conversion, did you use the circuit board from the M20 AFM? just curious. I did the swap with 19# injectors a while back and saw 0 performance gains, but it did definately get about half of the mileage as stock. so I took it of and tossed it. just curious what you think of it, and make sure you check out the crappy mileage your car will get with that.

I did use the circuit board off of my M20AFM. It took me a couple of days to get it off(mostly because I stripped to of the screws :evil:). When I first swapped my 19lb injectors I actually noticed a HP decrease. So I swapped my electronics board off my M20AFM, put on my M30AFM and bought a new oil filter. After 200 miles of driving I noticed my car could actually pull hard again. For some reason it just took a long time for my ECU to adapt to the changed(maybe because I didnt ease my injectors into the ECU, by using a 2.5bar FPR first, but thats a bunch of bullshit).

Here is sort of a write up I made(an incomplete and not even close to being thorough).

So:

1. Get a fuel pressure gauge(make a tap in line)
2. Get an M30 AFM with a K&N cone
3. Swap 19lb+ Injectors (u might want to clean them before
4. Swap electronics from the Donor M20 AFM into the M30AFM
5. Make a bracket for your M30AFM(it has different mounting points
6. Either do the beer and lightbulb trick(to strech your old boot) or get a TB to AFM boot off of a e34 325i. If you get a boot off of an e34 325i, then you would have to relocate your ICV, and purchase some vaccum line to the TB. Also you would have to relocate your brake vacuum line. But to skip all of this just strech out your old M20 TB to AFM boot, with heat.
7. Mount M30AFM
8. Drive around for a bit
9. Dyno the car with the M20AFM and M30AFM
10. Viola!

I might have missed a few things, but nothing important. You also might want to replace your fuel lines(if they are bad) and for sure replace your fuel filter(it helped with me).

-Saul

[TCD]

Why was the 535i AFM plug and play in our 325i? Drop the 24lb injectors and 535i AFM in and the car started and idled perfectly from the get go. Am I missing something?
Todd

[Stu]

Why was the 535i AFM plug and play in our 325i? Drop the 24lb injectors and 535i AFM in and the car started and idled perfectly from the get go. Am I missing something?
Todd

Was it from a late model M30? Like a '92? If so, then it is plug 'n play. If it's an earlier AFM, you need to swap the boards.

We slapped a late model M30 AFM directly on my brothers 3.0 M20, no problems.

[Saul325is]

Why was the 535i AFM plug and play in our 325i? Drop the 24lb injectors and 535i AFM in and the car started and idled perfectly from the get go. Am I missing something?
Todd

Was it from a late model M30? Like a '92? If so, then it is plug 'n play. If it's an earlier AFM, you need to swap the boards.

We slapped a late model M30 AFM directly on my brothers 3.0 M20, no problems.

Yes it is plug and play. Although, when I got my M30AFM someone already took out the electronics :(, which was just a bigger PITA for me.

-Saul