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 |  SKU: 258-A

Kelford Performance Camshafts

Toyota Supra A90/BMW Z4 G29 (B58 Gen 2)

$2,106.50
Camshaft Profile
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IMPORTANT : SPECIAL NOTES APPLY TO VEHICLE FITMENT FOR THIS PRODUCT, CLICK HERE TO VIEW

Description

 The Fifth Generation of Toyota Supra officially went on sale in May 2019. The car is a collaboration between BMW and Toyota and as such is equipped with the BMW B58 inline six that can also be found in the G29 BMW Z4. In its standard form the B58 provides the Supra with 250kW which, while healthy, leaves plenty of room for improvement. The Kelford range of catalogue camshafts are currently in production and set to become available in 2020. Our custom spring and Titanium retainer kit is already available.

  • BMW have released these engines in several revisions. To simplify things the Kelford team have named these revisions Gen 1, Gen 1.5 & Gen 2
  • If you are unsure of the generation of your engine please contact the sales team & they will make sure you get the correct camshafts

 

Camshaft Profiles - Click "Specifications" Tab for profile data:

258-A:

  • 270/268 Degrees advertised duration. 10.3mm/10.15mm lift.
  •  Stage1 Upgrade to suit bolt on parts, 550-750hp engines. Must have valve spring upgrade.

258-B:

  • 285/280 Degrees advertised duration. 9.65mm/10.60mm lift.
  • Stage2 Cams, suited for built engines running 850-1000hp. Great with aftermarket plenums. Can run using full Valvetronic system or locked in full open position when using an aftermarket throttle body. Must use KVS58-BT spring kit.

258-C:

  • 288/288 Degrees advertised duration. 9.65mm/10.80mm lift.
  • Stage3 Drag Cams, 1200hp+. Great when using alcohol based fuels and big boost. Recommended locking the Valvetronic system at 100% swing, must use aftermarket intake plenum with single throttle. Suited to professional built engines. Must use KVS58-BT spring kit.

 

Technical Specifications

258-A

Engine Make: Engine Model: Part Number:
TOYOTA B58 SUPRA 258-A
Valve Clearance: Intake:   Set   at the  
  Exhaust:   Set   at the  
 
Cam Lift:   Intake: 6.35mm Exhaust: 6.08mm
Rocker Ratio:   Intake: 1.622 Exhaust: 1.67
Nett Valve Lift:   Intake: 10.30mm Exhaust: 10.15mm
Advertised Duration @ 0.10mm Intake: 270 Exhaust: 268
Duration @ 1.00mm VALVE LIFT Intake: 230 Exhaust: 226
Timing @ 1.00mm VALVE LIFT IVO:   EVO:  
    IVC:   EVC:  
Suggested Centre Lines:   Intake: VARI Exhaust: VARI
  Lift @ TDC Intake:   Exhaust:  

 

 

 258-B

Engine Make: Engine Model: Part Number:
TOYOTA B58 SUPRA 258-B
Valve Clearance: Intake:   Set   at the  
  Exhaust:   Set   at the  
 
Cam Lift:   Intake: 6.38mm Exhaust: 6.35mm
Rocker Ratio:   Intake: 1.622 Exhaust: 1.67
Nett Valve Lift:   Intake: 10.35mm Exhaust: 10.60mm
Advertised Duration @ 0.10mm Intake: 285 Exhaust: 280
Duration @ 1mm VALVE LIFT Intake: 240 Exhaust: 240
Timing @ 1mm VALVE LIFT IVO:   EVO:  
    IVC:   EVC:  
Suggested Centre Lines:   Intake: VARI Exhaust: VARI
  Lift @ TDC Intake:   Exhaust:  

 

 

 258-C

Engine Make: Engine Model: Part Number:
TOYOTA B58 SUPRA 258-C
Valve Clearance: Intake:   Set   at the  
  Exhaust:   Set   at the  
 
Cam Lift:   Intake: 6.70mm Exhaust: 6.47mm
Rocker Ratio:   Intake: 1.44 Exhaust: 1.67
Nett Valve Lift:   Intake: 9.65mm Exhaust: 10.80mm
Advertised Duration @ 0.10mm Intake: 288 Exhaust: 288
Duration @ 1.00mm VALVE LIFT Intake: 242 Exhaust: 250
Timing @ 1.00mm VALVE LIFT IVO: 9 BTDC EVO: 65 BBDC
    IVC: 53 ABDC EVC: 5 ATDC
Suggested Centre Lines:   Intake: 112 Exhaust: 120
VALVE Lift @ TDC Intake: 1.90mm Exhaust: 1.50

Fitment Table

Fitment Notes

General Notes:

  • Generation 1, 1.5 and 2 B58 engines aren't perfectly defined by vehicle year models and our PartFinder data is thefore to be used as a guide ONLY. Please confirm your engine generation before purchasing. If you are unsure, contact with our sales team to assist you.
  • Gen 1 cam bolts have an M22 thread and a single piece timing chain
  • Gen 1.5 cam bolts have an M21 thread and a 2-piece timing chain but are otherwise Gen1
  • Gen 2 cam bolts and timing chain are the same as 1.5 but with a revised cam trigger and fuel pump lobe