Announcement

Collapse
No announcement yet.

S54 3.3L 87.50mm bore build tuning help/tips

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

    S54 3.3L 87.50mm bore build tuning help/tips

    Slow progress on my s54 build. I'm asking for a lot y'all but this forum is PEAK
    Im staying n/a installing mahle powerpak pistons this week,
    part #930286145
    Bore: 87.50mm
    Stroke: 91.0mm
    Rod length: 139.0mm
    Compression height: 32.3mm
    Pin diameter: 21mm
    Piston crown volume: -13.1cc
    Weight: 343g
    Compression ratio: 11.5:1
    pump gas 93
    Valve clearance is the same.

    I seen a few stories about ring clearance being too tight on these sets.
    Is there a clearance sweet spot on these rings?

    Going with cometic mls head gasket wondering thickness I should run I didn't deck block or head.

    Do I need aftermarket anything with this build injectors fuel pump etc?

    Ive been looking for similar builds in forums no luck yet.
    If any builds are close on this forum forward them to me.

    The goal is to keep almost everything oem but add protection where I can.
    Aftermarket parts
    mahle pistons
    beisan exhaust hub
    arp headstuds
    mls gasket
    ACL main and rod bearings

    Any tuners in North Carolina?





    Last edited by M3loverboy; 06-24-2026, 08:08 AM.

    #2
    My car has 87.5mm CP-Carrillo pistons, stock compression. A shop built the motor so I can't comment on the rings but it's running stock head gasket, head bolts, fuel pump, and injectors. Head and block were decked. I suspect the injectors are about maxed out because it also has 280/272 cams. Tuned by HTE.
    2001 TiAG M3 - 6mt Coupe, Anthracite Impuse - SOLD

    2001 TiAG M3 - 6mt Coupe, Black Nappa Leather
    Karbonius | Supersprint | Cat Cams | Beisan | Fikse Wheels | Mile End Composites | AST 5200 | Hotchkis | Brembo | Recaro | Rouge SMF | RTD | Yellow Tag Rack | HTE Performance

    Comment

    Working...
    X