Announcement

Collapse
No announcement yet.

Das Beast: My E30 track / street build

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • dvallis
    replied
    New rods. Wife ironically says "Those look cost effective"

    Leave a comment:


  • dvallis
    replied
    New custom catch can by Alexander Neumann in Indiana. Dual AN16 with enough venting. He does nice work.


    Leave a comment:


  • dvallis
    replied
    Oil starvation will do that

    Leave a comment:


  • Digitalwave
    replied
    That motor was pretty short lived!

    Leave a comment:


  • dvallis
    replied
    We'll dry sump this M20 next rebuild. Just because. This time we're going with a trap door oil pan. I'll post plans when it's done for anyone to duplicate.

    Remove stock baffle


    Cut off the stock sump


    Fine finish so it sits flat


    CAD the sides and top


    Add baffles


    Leave a comment:


  • dvallis
    replied
    Upon closer inspection #5 was cracked



    New set of forged pistons and rods on the way

    Leave a comment:


  • dvallis
    replied
    The mystery continues. No cracked rings on 4 or 5. Rings installed the right side up. Rings clocked correctly. No piston damage. Moving on to valves.

    Leave a comment:


  • dvallis
    replied
    A few more rebuild pictures






    Leave a comment:


  • dvallis
    replied
    GT3076R aka GT30R ball bearing water cooled turbo rated for 525 HP on re-flanged downpipe.

    Compressor: 4" inlet, 2" outlet, 0.64 A/R, 57 mm inducer, 76 mm exducer, trim 56
    Turbine: T4 undivided inlet, 3" V-Band outlet, 0.63 A/R, 60 mm inducer, 57 mm exducer, trim 84

    With the new 10:1 compression ratio and this fast spool turbo it should be quite a ride.

    Last edited by dvallis; 01-15-2021, 01:52 PM. Reason: typo

    Leave a comment:


  • dvallis
    replied
    New bitch tube with AN16 vent.. It's gonna breathe much better.

    Leave a comment:


  • dvallis
    replied
    We could drill it, plug and grind holes but that sound like a PITA. Going with the modified cast pan for now. Long term I'm going to scan a pan flange, recreate in CAD and do a custom pan

    Leave a comment:


  • moatilliatta
    replied
    I wonder if the pan is squished or something, shows using the same gasket as all M20's Minus an iX.
    http://bmwfans.info/parts-catalog/11131730234/

    Leave a comment:


  • Northern
    replied
    Originally posted by dvallis View Post

    Most but not all of the 528e pan holes line up with the M20 block. On to plan B ... cast oil pan butchery. I'll be giving away the pan on for-sale, since it was donated to me.
    If it's just the holes, is there some reason you can't just plug/redrill?

    Leave a comment:


  • dvallis
    replied
    It's a vacuum and afr thing. The stock throttle body has inlets between it an the MAF, one of which goes to the valve cover. Open the oil cap and you change the volume of air from head to intake manifold through a hose. Idle Air controller is supposed to compensate. You might have a defective IAC valve, wiring or hose.

    Leave a comment:


  • McGyver
    replied
    Originally posted by dvallis View Post
    Bitch tube mod in progress for improved crankcase breather. Will have AN16 fitting welded on end.
    Dumb question:

    On my stock m20 running factory management, when I pull the oil filler cap at idle the engine stumbles. Is this because engine vacuum is sucking unmetered air into the intake through the vent tube? (meaning the stock ECU with an AFM can't handle a vent-to-atmosphere catch-can, and would require the catch-can to be plumbed back into the manifold)

    Once I switch to MegaSquirt and a MAP sensor, the vent-to-atmosphere may suck in air at idle but will vent crankcase pressure under load. Both are OK because the MAP sensor is just reading the manifold pressure.

    Is that how it works?

    Leave a comment:

Working...
X