M42 Turbo - Scandinavian style

[MVincken]

The new bearing sets have 360 degree thrust surfaces, unlike factory bearings

Yes offcourse that´s a good thing, i was talking about the oilgroove on the bottom bearing :)

but no need to hijack the thread about this

[23732]

Sorry for no replys lately, but not much have been done. The pistons has not arrived yet, but I only have six valves to grind :D

Also bought another car, a 325iX touring with is going to be rebuilt to 2.7l and a HX40.

[m42_turbo]

Hi
How much rpm limit you plan on your m42 and how you think to upgrade oil pump?
I have also m42 turbo , on low boost 1.2 make 370 hp ... on 1.6 bar boost more what 400 hp ... I use turbo from mitsubishi evo 9 td05hr16g 10.5t , rev limit 8000 rpm , cr 8,5:1 , Pyramid rings head gasket...
Now I will rebuilt new motor :( I don't know what happened ... then I tune for 2.0 bar boost, motor was die ... It was failed arp bolt or oil pump is go bad ... new motor I will rebuilt with dry oil sump , because I think that stock oil pump is not to good for more power and rpm :(

[DER E30]

Hi
How much rpm limit you plan on your m42 and how you think to upgrade oil pump?
I have also m42 turbo , on low boost 1.2 make 370 hp ... on 1.6 bar boost more what 400 hp ... I use turbo from mitsubishi evo 9 td05hr16g 10.5t , rev limit 8000 rpm , cr 8,5:1 , Pyramid rings head gasket...
Now I will rebuilt new motor :( I don't know what happened ... then I tune for 2.0 bar boost, motor was die ... It was failed arp bolt or oil pump is go bad ... new motor I will rebuilt with dry oil sump , because I think that stock oil pump is not to good for more power and rpm :(

That wasn't the rod bolt's fault. The big end of the rod is discolored from heat. That would indicate spun rod bearing and oil pump probably did that

[gstuning]

Maybe I am wrong about the intake but just from others builds and experience I'm pretty positive the intake can't flow that much air. Sure you can cram as much boost into as you want but it won't flow freely like you want. The biggest limitation for sure is the M42 throttle body. It has a dual throttle plate that's also very restrictive. IIRC there was someone who made a M42 to M50 throttle body adapter.

Also a word of caution make sure you check your bearing clearances and crank before putting the M50 crank bearings in. My crank was worn out when I rebuilt my M42 and I developed some bad crank walk not too long after getting it running.

I'll definitely keep my eye out on this, I'm curious to see what sorta numbers you end up with this setup. I would be thrilled to hit 200-250 whp on the stock M42 I have now and wouldn't be disappointed in 300-350 whp on a built M42.

Just to chime in,

If you add pressure but maintain volume flow the total uncompressed flow increases.
He plans on 40psi boost. Thats 2.7 times atmospheric. In the simplest terms the total volume flow will be 2.7 times the original max possible, aside from efficiency improvements over the whole intake cycle.

[23732]

Hi
How much rpm limit you plan on your m42 and how you think to upgrade oil pump?
I have also m42 turbo , on low boost 1.2 make 370 hp ... on 1.6 bar boost more what 400 hp ... I use turbo from mitsubishi evo 9 td05hr16g 10.5t , rev limit 8000 rpm , cr 8,5:1 , Pyramid rings head gasket...
Now I will rebuilt new motor :( I don't know what happened ... then I tune for 2.0 bar boost, motor was die ... It was failed arp bolt or oil pump is go bad ... new motor I will rebuilt with dry oil sump , because I think that stock oil pump is not to good for more power and rpm :(

I am using stock oil pump that has been cleaned and regreased. I am thinking of a revlimit of 7500-8000rpm. But I don't think I would dear to drive it all the way to that point .

[23732]

Sorry for not posting any updates lately, but there has been much things going on in my life.

Some things have changed, and some things didn't work out as I thought it would.

First of all, I am wrecking the idea with M50 double valvesprings. Although it seems like it could work if you have the M42 from E30 that comes stock with double valvesprings, which do not apply for me, as I have a really late M42 (96 actually) from the E36. Bought a set of 16 springs and didn't realize I need retainers and lower springplates that centered the inner spring. So these will be sold or kept for possibly another project later.
I didn't want to do it, but it looks like I will have to go for the VAC spring set, even though they are reaaally expensive.

I am not using Vems engine management, but rather one that is called EMU. The guy that is going to tune the car, is more experienced with EMU and has tuned alot of other cars with it. Also it is a more modern management, with more functionality, like MaxxEcu, but cheaper. So that will be bought ib a few months.

I finally finished grinding all the valves. Exhaust valves were a pain in the ass, as they had alot of spots on them.

Things missing for the engine is:
- Nuke fuelrail
- Aeroflow FPR
- Clutch
- Intercooler
- Both wastegates
- Piston rings
- Conrod bolts
- Conrods (After looking at similar projects, I am buying a set of M50B25 Vanos rods as they are alot thicker)
- Valvesprings
- New timing chain

Also, some pictures for you:


The turbo, specs are in an earlier post.



All engineparts as of now, some parts are not in the picture, like the camshafts.



New workplace for the engine, inside our old kitchen.



The coils I am using, MSD Blaster SS. Will be making custom sparkplug wires, as short as possible for less disturbance.



The pistons. I am only using the pistons and wrist pin.



Freshly grinded valve seats.



Better view of the size of the turbo.

[Lmg]

Hey man, I used msd wires on myprevious m42 and ran the stock coil packs. The wires alone made a huge difference with torque, it was much easier to do burnouts by dropping the clutch.

Let me know when you have the SS coils installed, I'd love to do the same mod to my car.

cheers!

[23732]

Hey man, I used msd wires on myprevious m42 and ran the stock coil packs. The wires alone made a huge difference with torque, it was much easier to do burnouts by dropping the clutch.

Let me know when you have the SS coils installed, I'd love to do the same mod to my car.

cheers!

Hi, I am buying 100 feet for MSD wire and making the cables myself, so I can make them as short as possible, to have no loss.

I don't think you can use the Blaster coils on stock engine management as they have no ignition module, which the stock ones have.