Video summary
Building a $20,000 M3 Killer for $2000
Main summary
Key takeaways
Product Reviewed (Parts Used) & Context
The video is primarily a project build: a neglected BMW diesel (abandoned after 2 years) is being transformed with performance parts to beat an E46/Evo-style BMW M3 target.
- Goal: 0–60 in ~4.6s
- Benchmark cited: ~4.6s for the “last ever V8 3 series” with 400+ hp
- The main “product” spotlight is BC Racing BR Series coilovers, with additional upgrades including:
- Garrett GTD 2872 hybrid turbo
- Darkside Development intercooler
- Supporting clutch/brake line components
Key Features / What Was Installed (And Why)
1) BC Racing BR Series Coilovers (Front Focus)
Stated Features
- Adjustable height from the bottom without changing preload
- Front camber adjustment at the top
- Approximately 30 clicks of damper adjustment (quick, no disassembly)
- Intended to support extra grip via negative camber during cornering
- Chosen to improve ride/handling after bad shocks and presumed rust/bushing subframe issues
User Experience in the Video
- Installation is described as manageable once components are accessible.
- Old suspension hardware is rusted/failed, making the coilovers part of a “transform the car” moment.
- Some temporary/loose assembly happens on drop links until lowering.
Pros (Mentioned/Implied)
- Better control/handling potential via height + camber + damping
- Quick tuning via click-based damping
- Damper adjustment can be done without disassembling the setup
Cons (Mentioned Indirectly)
- Heavy disassembly is required due to rusted suspension hardware (not a coilover-specific flaw, but it affects effort/time).
- The video does not report final real-world performance results from the coilovers alone—only expectations of improvement.
2) Adjustable Drop Links (Anti-Roll-Bar Interference)
Why They’re Used
- When lowering, drop link length matters—otherwise the anti-roll bar can hit control arms during cornering.
User Experience
- One adjustment nut/bolt was rounded off, requiring an angle grinder (“plan B”).
3) HEL Stainless Braided Brake Lines (Front Upgrade; Rear Later)
Stated Benefit
- Compared with rubber hoses, braided lines reduce braking loss from heat expansion (rubber expands; pedal/pressure consistency suffers).
User Experience
- Front lines install more easily than the rear.
- Rear work involves more effort and uncertainty about pipe damage—verification depends on bleeding for leaks.
4) Garrett GTD 2872 Billet Ball Bearing Hybrid Turbo (From Darkside Developments)
Stated Features
- Garrett GTD 2872 hybrid turbo with an electronic boost actuator
- Same external dimensions, but larger internal capability aimed at 400+ hp
- Installed as part of a larger power package including a remap
User Experience
- Turbo removal is difficult due to fuel/injector components not being easy to remove; an injector puller is planned.
- Old turbo comes out; the new turbo installs with careful oiling steps on the oil feed tube/O-rings.
- The remap is scheduled soon due to time constraints.
5) Darkside Stepped, Larger Front Mount Intercooler
Stated Features / Benefit
- Larger surface area → better cooling of denser intake air
- Designed to support more efficient fueling/performance for turbo diesel setups
6) Clutch / Drivetrain Reliability Issues (Sachs Clutch Slipping)
Key Problem
- The “upgraded” Sachs clutch slipped almost immediately after installation (after ~500 miles of bedding).
Symptoms lead to gearbox removal and detection of:
- Flywheel hot spots
- Poor wear/play
Resolution Strategy
- Replace the flywheel.
- Choose a clutch based on reports that a BMW 5-series V8 clutch setup can handle high torque (intended to survive the mapped power).
Pros / Cons Summarized (As Emphasized in the Video)
Main Positives (Coilovers + Build Parts)
- BC Racing coilovers: height, camber, and damping adjustability aimed at improved ride/handling (especially via front camber tuning)
- HEL braided brake lines: intended to hold up under heat for more consistent pressure/pedal feel
- Turbo/intercooler: engineered around a 400+ hp target and improved charge cooling
Main Downsides / Limitations
- Massive rust/seizure workload makes the process slow and expensive (subframe bushings, brake lines, track rod ends, etc.)
- Clutch reliability failure forces extra labor and cost
- No quantified end-results are shown in this clip; it ends with “remap scheduled” and a promise—not confirmed dyno/track numbers
Comparisons Made
- Target comparison: trying to outperform an M3 (citing 0–60: 4.6s and 400+ hp for a referenced BMW V8 3-series)
- Clutch comparison (informal): selecting a clutch based on online reports from BMW V8 applications expected to survive high torque
No direct coilover A vs coilover B comparison is made—BC Racing is simply the selected option.
Unique Points Mentioned (All)
- BMW diesel project abandoned for 2 years; not even able to power on (even doors).
- Goal to reach faster than an M3, targeting ~4.6s 0–60 and 400+ hp.
- Car failed MOT due to leaky shock absorbers.
- Old suspension required major internal disassembly (e.g., carpet removal to access shock mounts).
- Plan to drop front and rear subframes due to rust and handling issues.
- Installing BC Racing coilovers with:
- height adjustment from bottom without preload change
- front camber adjustment
- 30-click damper adjustment without disassembly
- Adjustable drop links needed after lowering to avoid anti-roll-bar interference.
- Track rod ends were seized/rounded; angle grinder used and threads matched carefully before driving/allocation to alignment.
- Rear subframe/bushing replacement challenges:
- press tool failed → “fire + hammer” plan B
- rear bushings in poor condition; one “absolutely destroyed”
- Rear subframe had a crack, welded with a budget “stick welder from Aldi” due to money running out.
- Brake line challenges:
- rusted/seized rear lines required new BMW hard lines
- handbrake parts (pads?) worn away → extra cost
- Snap bolt/threads required helicoil thread repair.
- Engine-side/fuel work:
- clutch removed due to slipping; flywheel ruined (hot spots/play)
- engine mount bracket bolts backed out → retightened with locktight
- rocker cover gasket considered but postponed
- glow plugs replaced (hard but succeeded); glow plug module replacement planned/claimed done
- Turbo/intercooler upgrade:
- replace turbo with Garrett GTD 2872 hybrid (electronic actuator)
- replace intercooler with Darkside larger stepped unit
- remap scheduled soon due to time pressure
- Turbo install includes careful oiling/O-ring steps before first spin.
- Rebuild includes clutch, gearbox mount work, prop shaft, linkages, supports, and heat shields.
- Rear brakes installed without handbrake due to wrong parts delivery timing.
- Brake bleeding required after braided line installation; uncertainty about possible pipe damage.
- Sponsorship included: HelloFresh (50% off first box, 20% off next four boxes, plus 2 months free treats). Not a product review, but present in the video.
Verdict / Recommendation (Based on Video Claims)
- BC Racing BR Series coilovers are presented as a strong, feature-rich handling upgrade for a damaged/rusty BMW—offering fast tuning (height/camber/damping) intended to improve grip and ride control.
- However, the overall build outcome is not proven in the clip: the project continues, with major clutch failure and significant rust-related obstacles.
- Overall: For similar restoration/performance suspension swaps, the coilovers look like a solid adjustable option, but success depends heavily on fixing surrounding drivetrain/suspension condition (subframe/bushings/geometry) and ensuring clutch reliability.
Speaker-Specific Contributions (Who Said What)
- Subtitles appear to be mostly from one main narrator.
- There are brief interjections during mechanical work (e.g., “Will,” “Tom,” “Will went ahead…,” and “Thanks, Darkside…”).
- No distinct alternate technical product reviews are provided beyond helping/doing parts of the wrenching and discussing bolts, bushings, and tools.