CP Pistons FA20 / 4U-GSE
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CP Pistons for FA20 / 4U-GSE Engines
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
STD bore size pistons are not recommended in a used bore for any performance engine unless the bores have done minimal work with minimal wear and the correct piston to bore clearance can be adhered to.
All piston manufacturers have a specific piston to bore clearance that they recommend. If STD bore pistons are requested and there is a piston to bore clearance issue we will not exchange or refund, due to the reasons given above.
| Product Name | CP Pistons FA20 / 4U-GSE |
|---|---|
| Brands | CP Carrillo |
| Engine | FA20, 4U-GSE |
| Make | Subaru, Toyota |
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.
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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 information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What is the recommended bore clearance for CP Pistons in the FA20 / 4U-GSE engines?
For CP Pistons, the recommended piston to bore clearance varies depending on the specific piston part number. It's crucial to follow the manufacturer's specifications for clearance to ensure optimal performance and reliability. Always consult the CP Carrillo documentation for the exact figures.
Can I use STD bore size pistons in a used bore for performance applications?
Using STD bore size pistons in a used bore is not recommended unless the bore has minimal wear and can maintain the correct piston to bore clearance. If there are any clearance issues, we cannot offer exchanges or refunds for these pistons.
What compression ratios are available for the CP Pistons for FA20 / 4U-GSE?
The CP Pistons for the FA20 / 4U-GSE engines are available in two compression ratios: 9.0:1 and 10.0:1. Ensure you select the appropriate compression ratio based on your engine's tuning and performance goals.
Are there any special considerations for installation of these CP Pistons?
When installing CP Pistons, ensure that the piston to bore clearance and ring gaps are set according to the manufacturer's recommendations. Additionally, proper machining of the block and attention to detail during assembly are critical for performance and longevity.
What part numbers correspond to the different bore sizes for these pistons?
The part numbers for CP Pistons for the FA20 / 4U-GSE engines are as follows: SC7402 for 86mm bore at 9.0:1 compression (special order), SC7403 for 86.5mm bore at 9.0:1 compression, SC7405 for 86mm bore at 10.0:1 compression (special order), and SC7406 for 86.5mm bore at 10.0:1 compression.
