Has anyone else experienced blow by? My stock M42 has been running about 8psi and just recently started to shoot oil out of the valve cover breather. I had it vented to atmosphere but now it is going to a catch can and it fills the can up pretty quickly when driving on track in boost. Should I try and route the other hose on the catch can to the turbo intake to get some vacuum in the crank case?? I have not done a compression test or leak down test yet. Just sorta curious if anyone else has experienced this issue.
Announcement
Collapse
No announcement yet.
M42 turbo fact thread
Collapse
X
-
18psi and I never had excessive blowby to that extent. I just had a hose dumped under the car. I'm guessing you've either poor ring sealing because your engine is old and neglected or that with the beating and overheating of your drifting, the ring ends have butted together.
IG @turbovarg
'91 318is, M20 turbo
[CoTM: 4-18]
'94 525iT slicktop, M50B30 + S362SX-E, 600WHP DD or bust - updated 3-17
Comment
-
Originally posted by varg View Post18psi and I never had excessive blowby to that extent. I just had a hose dumped under the car. I'm guessing you've either poor ring sealing because your engine is old and neglected or that with the beating and overheating of your drifting, the ring ends have butted together.
I am thinking of doing a catch can setup that'll T off from the valve cover and pull vacuum from the turbo intake side, go to a catch can on the other side and the catch can will flow back into oil pan. Sorta like how the SR20 catch can setup is. Maybe that'll help.
Comment
-
subbing to this thread as I just picked up a 91 318I...
First thing I need to do is go through and see if this motor is healthy enough to boost...
Any big to-do items or red lights I should look for before dumping cash into this towards boosting?
And where are people getting thicker head gaskets? I got a whole new HG set, but now wondering if I should not have gone OE spec
Comment
-
I have a lot of blowby now, but I think I also holed piston number 1... was playing with timing and what worked on the street did not work at all on the track, probably due to intake temps or some temperature compensation parameter being tuned wrong.
eternal24k - as with anything, make sure the engine is in great shape before you start. Check the timing case, fix any leaks, fix any running issues. You'll save yourself a lot of pain if you start with a good base.
Many of us run stock head gaskets with head studs. Depends on how crazy you want to get with the boost.
Comment
-
Thought you guys might like to see this:
18psi 265whp
1986 Garrett turbo wouldn't blow any harder than 18psi.
DynoSource is proud to post up our customer Jon White's amazing build. Its a 1991 BMW 318is m42, 4 cylinder engine, Forged Internals, Turbocharger running Me...
We placed a new Borg warner s200sx on to see what it would do! Will run it HARD next week. Near 30psi.Last edited by JRW21; 07-25-2018, 09:37 PM.
Comment
-
Originally posted by JRW21 View PostThought you guys might like to see this:
18psi 265whp
1986 Garrett turbo wouldn't blow any harder than 18psi.
DynoSource is proud to post up our customer Jon White's amazing build. Its a 1991 BMW 318is m42, 4 cylinder engine, Forged Internals, Turbocharger running Me...
We placed a new Borg warner s200sx on to see what it would do! Will run it HARD next week. Near 30psi.
More deets on this bish. Intake is what? Manifold?
Comment
-
Here are the down and dirty specs:
DynoSource is proud to post up our customer Jon White's amazing build. Its a 1991 BMW 318is m42, 4 cylinder engine, Forged Internals, Turbocharger running Me...
1991 BMW 318is
M42
Ms3 Pro
Bored/Stroked to 2.0 liter
Bottom End:
86.5mm Wiseco
m44 83.5mm Crank
Stock forged early model m42 140mm rods
ARP 2000 Main bolts
ARP 2000 Rod bolts
VAC coated Main Bearings
VAC coated Rod Bearings
Head:
Supertech dual valve springs, seats, and retainers SPR-H1000D/BM, SEAT-BM50, RET-K20a2/t2
Supertech 6mm black nitride coated Intake valves BMIVN-1030S
Supertech 6mm Inconel exhaust valves BMEVI-1030S
Supertech Keepers KPR-6S-7
BMW oem 6mm valve guides
VW 48gram Lifters p/n 050 109309
Cometic MLS 86.5mm .098" gasket
ARP 2000 Head studs
Audi red top Coils
Nuke fuel rail
Bosch 044 high pressure fuel pump
Surge tank w/low pressure fuel pump
Land Rover 3" throttle body
Meziere elecctric water pump
Mishimoto radiator
1995 M3 zf 310 transmission
323i throw out bearing
m5 240mm clutch & UUC light weight flywheel
1st Turbo:
1986 Ford Turbo Coupe Garrett T3 .63/.63 W/Modified Turbine
Compressor:
56mm Inducer
61mm Exducer
Tim 84
Turbine:
56mm Inducer
61mm Exducer
Tim 84
Manifold fabbed from two OEM m42 intake manifolds to create this:
Highlights:
Last edited by JRW21; 07-29-2018, 07:40 AM.
Comment
Comment