Subaru EJ257 WRX STI Spool H Beam Conrods and CP Forged Pistons
Subaru BRZ FA20 Spool H Beam Conrods and CP Forged Pistons
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Spool Subaru BRZ FA20 Forged Connecting Rods and CP Pistons.
CP Pistons available in:
- Bore: 86mm (STD) / Comp: 9.0:1 - Part#: SC7402 - Special Order
- Bore: 86.5mm (+0.5mm) / Comp: 9.0:1 - Part#: SC7403
- Bore: 86mm (STD) / Comp: 10.0:1 - Part#: SC7405 - Special Order
- Bore: 86.5mm (+0.5mm) / Comp: 10.0:1 - Part#: SC7406
Pistons include rings, gudgeon pins and pin locks.
Spool Connecting Rods Feature:
- ARP 2000 fasteners (L19 fasteners are available as an upgrade)
- High tensile 4340 forged steel
- 2 Piece forging
- Hardness of HRC36-42
- Dowelled caps for precision alignment
- X-RAY & Sonic tested
- Quenching and heat treated
- Shot peened
- 100% Magnafluxed
- Weight Matched Sets +/- 1 gram
- Vacuum degassed to remove impurities
CP Pistons standard features include:
- 5310 gudgeon pins (9310 thicker wall thickness pins are available as an upgrade)
- Deep valve reliefs accommodate high lift camshafts
- Larger valve reliefs for +1mm valve sizes
- Custom skirt cam and barrel design
- Accumulator grooves
- High strength aluminium forgings
- High performance rings
- Fully CNC machined and balanced to +/- 1 gram
- Wrist pins included
- Double pin oilers force fed from oil ring groove
- Pick lock grooves for easy lock removal
- Pin fitting included
Note: We recommend Joe Gibbs Break in Oil for all new engines.
| Product Name | Subaru BRZ FA20 Spool H Beam Conrods and CP Forged Pistons |
|---|---|
| Brands | Spool |
| Engine | FA20 |
| Make | Subaru |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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Disclaimer:
Product images are for description purposes only. Actual product may vary.
Shipping calculations available at checkout.
If you are unsure, get in touch by emailing [email protected], messaging us on Facebook, or phoning us at +61 7 5645 1333 (8am to 2pm AET).
What is included in a typical Spool engine kit?
Kits usually include pistons, rings, rods, bearings and related hardware depending on the engine family. Check the listing for exact inclusions.
Do I still need machining with a full engine kit?
Yes. The block must be honed and all clearances checked and set by your builder. Assembly should only occur after full measurement and verification.
What are the recommended bore clearances for the CP pistons in the FA20 kit?
For the CP pistons in the FA20 kit, a typical bore clearance of 0.0015" to 0.0020" is recommended. However, this can vary based on the specific application and operating conditions, so always consult with your engine builder for precise specifications.
What is the torque specification for the ARP2000 bolts on the Spool conrods?
The ARP2000 bolts included with the Spool conrods should be torqued to approximately 55 ft-lb when using ARP Ultra-Torque lubricant. Always verify with ARP's latest instructions for the most accurate specifications.
Can I use the Spool conrods and CP pistons for high boost applications?
Yes, the Spool conrods and CP pistons are designed for high-performance applications, including high boost setups. However, reliability will depend on proper machining, clearances, tuning, and fuel quality. Ensure that your engine is built to handle the increased stresses associated with higher boost levels.
Do the CP pistons require any specific ring gap settings?
Yes, the ring gaps for the CP pistons should be set according to the intended use of the engine. A common starting point for a performance application is 0.004" to 0.005" per inch of bore diameter. Adjustments may be necessary based on boost levels and RPM, so consult with your engine builder for optimal settings.
What machining processes are necessary for the Spool FA20 conrods?
The Spool FA20 conrods may require big-end or small-end honing to ensure proper fitment with the crankshaft and pistons, as factory tolerances can vary. Always check clearances and perform any necessary machining to achieve optimal performance and reliability.
