3l m50 vanos with boost.

[ibatic1]

Just a few questions.

1. My motor is a 95 m50tub25 and I plan to stroke it to 3l. I also plan on doing the hotter cams from the m54 as well. I'm wondering if I will have any issues adding boost to this setup?

2. Before I add boost will the car run on a stock dme or will I need to get a tuned ecu/chip? After boost will I be able to maintain the stock ecu with a tune or will I need some sort of standalone or piggyback?

3. If I already have a spare m52b28 in my garage is it still worth it to find a m54 for the rotating assembly or just use the 2.8 parts?

4. Should I try to find a non vanos head?

Thanks to everyone who cares to help. I have been doing my research and have found many contradicting posts. Just wanna get this cleared up so I can start.

[st.petebiodiesel]

Some say keeping the block at 84 is better for boost, but I always see a bunch of S52's (86.4mm) making a ton of power without issue.
The biggest problem with the 3.0 strokers is everyone puts nominal sized pistons in wore out blocks. My first 3.0 stroker I didn't remove the ring step at the top of each cylinder and snapped my top piston rings. With standard sized pistons the piston to wall clearance is always too loose.To do it right you would have to find some oversized pistons which aren't cheap. Some people (myself included) just get second hand S52 pistons and bore up the M50 block to 86.4mm.
I have a 12:1 compression M50B32 in my e36 running a red label 413 DME with a chip from TRM.

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[m3boost]

Some say keeping the block at 84 is better for boost, but I always see a bunch of S52's (86.4mm) making a ton of power without issue.
The biggest problem with the 3.0 strokers is everyone puts nominal sized pistons in wore out blocks. My first 3.0 stroker I didn't remove the ring step at the top of each cylinder and snapped my top piston rings. With standard sized pistons the piston to wall clearance is always too loose.To do it right you would have to find some oversized pistons which aren't cheap. Some people (myself included) just get second hand S52 pistons and bore up the M50 block to 86.4mm.
I have a 12:1 compression M50B32 in my e36 running a red label 413 DME with a chip from TRM.

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Not really.. unless you're going for 700+ rwhp... I'm at 87mm on my s52 and 86.5mm on my s50 both boosted

[ZekeTheSneak]

Some say keeping the block at 84 is better for boost, but I always see a bunch of S52's (86.4mm) making a ton of power without issue.
The biggest problem with the 3.0 strokers is everyone puts nominal sized pistons in wore out blocks. My first 3.0 stroker I didn't remove the ring step at the top of each cylinder and snapped my top piston rings. With standard sized pistons the piston to wall clearance is always too loose.To do it right you would have to find some oversized pistons which aren't cheap. Some people (myself included) just get second hand S52 pistons and bore up the M50 block to 86.4mm.
I have a 12:1 compression M50B32 in my e36 running a red label 413 DME with a chip from TRM.

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How did you get to 12-1 compression? I thought s52 internals would yield 10.5-1.

[st.petebiodiesel]

How did you get to 12-1 compression? I thought s52 internals would yield 10.5-1.

CP forged pistons.




I am building another 3.2 currently with stock S52 pistons.

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[JOMARO]

I already have an m50b30 Turbo with M54b30 rotating assembly , with a a vanos head and S52 Cams , getting 600 whp on 93 oct + Meth inj
( I have MLS 0.140 )
and to answer your question :get an Aftermarket ECU

the B28 parts will give you a higher Rev limit , then You might need a non vanos head :-)

[ibatic1]

So scrap my m52b28 and find a m54 to pull everything from?

Jomaro what engine management is that engine on?

[JOMARO]

So scrap my m52b28 and find a m54 to pull everything from?

Jomaro what engine management is that engine on?

you need the pistons and crank ,the rods are the same as the B28
I m running on MSV3 Pro