Renovelo Forum

After a spirited canyon drive in my 1995 M3 (s50b30US engine) ended with a blown engine I decided I'd tear into it and see the damage. Upon discover an "S" curved exhaust valve completely off its keeps, and significant damage to several cylinder walls and pistons it was clear it would need some serious care. This is my first real engine build so I'm learning a lot as I work through this project.

The plan is to eventually go for some cams and possibly solid lifters and keep it a moderately high revving NA build.

The engine/components were professionally machined, balanced and reassembled.

Current Engine Build Components

Head
-Valve spring kit: SPRK-H1005D-BM
-Exhaust Valves: BMEVI-1030S
-Intake Valves: BMIVN-1030S
-All new guides and keeps
-Cometic MLS head gasket to match +0.5mm bore on the block.
-ARP head studs

Block
-JE Pistons, 86.5mm bore, 11.5 CR: 297182
-King rod and main bearings
-Rods, Molnar BMWH5315CFB6-A
-stock crank (polished)
-XACT prolite flywheel (single mass 11.2 lbs), clutch as well

Exhaust
-Shorty headers (look like the TMS ones, but not certain)
-Bimmerworld e36 3 series track pipe kit by magnaflow, 176.18.536.0001
-stock muffler (for now)
-AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge

Intake/Fuel
-3.5" MAF
-cold air intake with K&N filter
-silicone intake boot
-24lb injectors
-thinking I'll run a ~95 octane mix
-I believe it is just the stock throttle body (may look at an upgrade at some point)

DME: Bosch 0 261 200 413 (silver label)

I'm just getting started with the tuning and hope to have it all dialed in by spring.

Here are some pics of the build. I'd add more, but 5 is the limit per post.

Great project...thanks for posting! Good luck with the new tune!

great build