M42 turbo fact thread

[e30guydownunder]

Having driven the GT3071 car and being in the GT3076 car (although with 0.82 rear)....either seem to be very similar to my TD06 on the SR. Little bit of lag in response but when it comes on FARK YEAH. Now a convert for ball bearing, bigger turbo on smaller motor (1.8 'v' 2L) has quicker boost response than the smaller bush bearing TD06 did. I will update with a personal "driver experience" after the fact though :)

[wazzu70]

I have been meaning to bump this thread also. The SR20 that replaced my never finished M42 turbo is currently being replaced.....by an M42 Turbo :D

Run down on my build:

E36 M42
8.5:1 CP Pistons
O-Ringed Block and Head, Copper Headgasket
VAC Cams 275/265 (I think from memory), still running Hydraulic Lifters
M12 ARP Headstuds
ARP Mainstuds
ARP Rod Bolts
Balanced Bottom End
M20 Clutch / Flywheel
Remote Oil Take Off Plate w/-10 Oil Line setup, BMW Oil Cooler and 3 Quart Accusump
Custom Turbo Manifold, 1.25" Runners, into 15 degree merge collector, T3 Flange
Garret GT3076 w/ 0.63 Turbine Housing
Tial MVR 44mm Gate
Custom Inlet Manifold (along 666fab lines) with 1000cc Injector setup
DTA S60 ECU

Will have a big fuel system behind it capable of running E85 but may go back to 98 RON Octane fuel as people have been having some issues with the consistency of the E85 out of the pump here. That decision yet to be made.

I am currently re jigging all the engine mounts and turbo manifold from last time around but hope to have it running in a month or so :)

Chris, glad to see you are back on the M42 path. Looking forward to how this pans out! Also interested on your thoughts with the turbo once you get it up and going.

[e30guydownunder]

My Engine is at the machinist getting a light hone and sizing up new rings and bearings. There are a few M42T's getting around here and a couple in the works but info always seems scarse.

This is the engine I have purchased, prior to cams and running a 3071. Think it was running around 250-270kw in this configuration.



And my mate's car with a full built engine and the same turbo I have.



I have nearly finished the turbo manifold and dump pipe, just got to weld the EGT ports in and get it ceramic coated. The only major jobs left are the custom inlet and re-doing the engine loom. I also need to finish relocating the sway bar around the front as I have gone with a custom rear sump setup and the set the engine back about 90mm.

[MF DOOM]

Any updates? And im curious about your friends car. Is it online anywhere? build specs and what psi? Seems like you guys over there have way more m42 builds.

[e30guydownunder]

No build thread till its done and working but check the link in my sig for the sr20 story. My mate has a gtx3076 with 0.82 rear housing and the thing is ridiculous. Stand on it and third gear give it a second and the tyres are turning. Before you know it 170+ on the speedo. My matenis running about 285kw at the tyres nut is out of fuel pump. With my turbo there has been a 300kw dyno sheet but I'm not sure I will push it that far regularly. Rarely get the track space to make use of it :). Once it's all workin videos and stuff will be up for public consumption.

[MF DOOM]

build thread??


When you get this done youve got to let me know how the gt3076 is. Ive been contemplating it for my car for awhile.

[e30guydownunder]

I have been meaning to bump this thread also. The SR20 that replaced my never finished M42 turbo is currently being replaced.....by an M42 Turbo :D

Run down on my build:

E36 M42
8.5:1 CP Pistons
O-Ringed Block and Head, Copper Headgasket
VAC Cams 275/265 (I think from memory), still running Hydraulic Lifters
M12 ARP Headstuds
ARP Mainstuds
ARP Rod Bolts
Balanced Bottom End
M20 Clutch / Flywheel
Remote Oil Take Off Plate w/-10 Oil Line setup, BMW Oil Cooler and 3 Quart Accusump
Custom Turbo Manifold, 1.25" Runners, into 15 degree merge collector, T3 Flange
Garret GT3076 w/ 0.63 Turbine Housing
Tial MVR 44mm Gate
Custom Inlet Manifold (along 666fab lines) with 1000cc Injector setup
DTA S60 ECU

Will have a big fuel system behind it capable of running E85 but may go back to 98 RON Octane fuel as people have been having some issues with the consistency of the E85 out of the pump here. That decision yet to be made.

I am currently re jigging all the engine mounts and turbo manifold from last time around but hope to have it running in a month or so :)

[naika]

Hi Guys,
Thanks for sharing your set-ups and info on turbo build for an M42, we are in the process of building one with a friend of mine.
If any of you want to keep this thread going :)

[PFCRayB]

i know its a oldish thread but fux it, I'm rebuilding my turbo motor properly set up this time...just need a rebuild kit for my turbo or a new turbo and a M.S set up( anyone have tunes that i can have)

[Dj Buttchug]

^ depends on your goals. but yea just need to figure out a way to tune them

[aka-e30]

How do you guys feel about these injectors? I just came across them on ebay. http://www.ebay.com/itm/660cc-Focus-...32115f&vxp=mtr

[Dj Buttchug]

bump cause I found this while searching for documents on my computer. I put this spec sheet together for my build.

great info on clearances for anyone measuring parts or blueprinting

M42B18

models :1989-92 318i/is/ic

DOHC 16 valve inline 4 Cylinder engine hydraulic lifters

Head casting number:

engine managment: Bosch DME M1.7

displacment: 1794cc 1.8l

HP: 136 @ 6000

TQ: 127 @ 4600

idle speed: 850rpms

firing order: 1-3-4-2
Bore: 84 mm, 3.31"

Stroke: 81 mm, 3.19"

Compression ratio: 10.0:1

Rod length: 140 mm / 5.512 in

Rod big end bore: 1.890 in

Crank rod journal: .858 in

Piston Dome/Dish:

Int valve dia: 33mm, 1.299"

Ex valve dia: 30.5mm, 1.201"

valve seat angle: 45 degrees

Cam lob height: 1.8755"- 1.8803"

Camshaft end play: 0.006"-0.013"

bearing clearance: 0.0008"-0.0021"

spark plug gap:0.027"

fuel pump pressure: 43psi

oil pressure @ idle: 18-28psi, 1.3-2bar

oil pressure@ top speed: 57-61psi, 4-4.3bar

[dsm2002]

For turbo/supercharged M42s, Supertech have standard sized and +1mm inconel exhaust valves for $30 each. Link

[Jafxod]

I would love to drive one of these. Yours setup is so clean buttchug and im sure 270 is a great feeling number. Im aiming for 300 with my m50 which prolly feels the same accounting for weight

[Dj Buttchug]

What size and how many CFM of a fan do you think I should get for my build? What are you running buttchug?

im running a 2100cfm 16inch. it works well but there is a better fan to purchase. A member here has the specs on it. I believe it has its own thread.


also bump. this could turn out to be a good thread. more dudes with boost these days.

leggoo