BMW

Ferrea Competition Plus Valves have built a reputation as the industry's most reliable extreme duty valve. To manufacture the valves we use special aerospace quality alloys, including the EV8-Z18, which provides high tensile strength. An exclusive two-step slow forging process ensures proper grain flow and virtually eliminates any damage to thematerial structure. The valves are then heat-treated and stress-relieved over a 48-hour period, which is the crucial base of our molecular integrity. These valves feature avionics-quality hard chrome along with a specially applied hard tip.

Product detailed specification
Bore size	84.00mm
Stroke	89.60mm
JE Pistons compression ratio (CR)	9.5:1
OEM compression ratio (CR)	10.2:1
Dome volume (CC)	-14.7cm3
Compression height (CH)	32.40mm
Pin diameter	22mm
Features	Accepts Turbo and Nitrous; Ultra series
Fits for	BMW - 3.0 24V Turbo (N55B30)

• Purpose-Built For Boost High Boost and BMW B58B30 Applications
• Forged From Ultra-Strong 4340 Steel
• Patented Three-Pocket Design
• Capable of 1500 HP
• 3/8 x 1.500 in. ARP 2000 Fasteners
• High Quality APMCO Bronze Pin Bushing
• 26 Point Detailed CMM Inspection Report Included

Upper	Lower	Quantity	Position	Crankshaft	Housing	Max Length	Max Wall
SV	SV	8		53.99 / 53.97	57.61 / 57.60	14.8	1.796

ENGINE BEARINGS
	CON ROD BEARING SET
	Part#
	6B1515H	6B1515HX
Sizes	STD, .025, .25	STD
Oil Clearance	Standard	+ 0.001" Extra
Half Type	Identical Halves
Material	Tri-metal Hardened steel backs
Min Std Shaft Size	1.9675in / 49.975mm
Max Std Shaft Size	1.9681in / 49.991mm
Min Std Tunnel Size	2.0866in / 53.000mm
Max Std Tunnel Size	2.0875in / 53.015mm
Max Wall at Crown	0.0588in / 1.493mm	0.0538in / 1.481mm
Max Overall Length	0.709in / 18.00mm
Notes
Diagram        (Top View)

Engines BMW M3 E36 - 3.0 (S50B30)

Spring data:

Seat pressure - 94lbs @ 35.70mm
Open (lift) pressure - 209lbs @ 10mm
Spring coil bind - 20.70mm
Rate - 11.50lbs/mm
Max lift - 15.00mm
Outer spring outer diameter: 29.65mm
Outer spring inner diameter: 21.85mm
Inner spring outer diameter: 20.50mm
Inner spring inner diameter: 15.50mm

Set includes:

Dual springs: 24 pcs. SPR-H1005D-BM
Titanium retainers: 24 pcs. RET-AU5VE-T1
Seats: 24 pcs. SEAT-BM60

Ferrea Competition Plus Valves have built a reputation as the industry's most reliable extreme duty valve. To manufacture the valves we use special aerospace quality alloys, including the EV8-Z18, which provides high tensile strength. An exclusive two-step slow forging process ensures proper grain flow and virtually eliminates any damage to thematerial structure. The valves are then heat-treated and stress-relieved over a 48-hour period, which is the crucial base of our molecular integrity. These valves feature avionics-quality hard chrome along with a specially applied hard tip.

Product detailed specification
Bore size	84.50mm
Stroke	89.60mm
JE Pistons compression ratio (CR)	9.5:1
OEM compression ratio (CR)	10.2:1
Dome volume (CC)	-14.7cm3
Compression height (CH)	32.40mm
Pin diameter	22mm
Features	Accepts Turbo and Nitrous; Ultra series
Fits for	BMW - 3.0 24V Turbo (N55B30)