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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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Description
adjustable gear Atomic Barra Vernier Sprockets Adjustable Cam Gears – Atomic Performance ProductsAtomic Vernier Cam Sprockets Total Timing Control for 1000HP+ Builds The Problem The factory VCT system was designed to cope with much less valvetrain load than high performance engines produce as their focus was on minimising rotational power loss and maximising fuel efficiency. When upgrading valve springs, increasing lift and modifying other engine components, the valvetrain load increases beyond where the factory VCT system can maintain stable,
Atomic Vernier Cam Sprockets
The Problem
The factory VCT system was designed to cope with much less valvetrain load than high performance engines produce as their focus was on minimising rotational power loss and maximising fuel efficiency. When upgrading valve springs, increasing lift and modifying other engine components, the valvetrain load increases beyond where the factory VCT system can maintain stable, timely control of the camshaft timing. This loss of control could lead to piston to valve contact in the worst case but generally manifests as DTC codes, check engine lights or timing system rattle.
Factory VCT phasers are unreliable with upgraded cams. Once you upgrade to stiffer springs and higher lift cams, the factory VCT gears often fail to reach or hold their target position against the extra load. This causes inconsistent power, check engine lights (error codes), and the dreaded VCT rattle.
The Atomic Solution
Atomic Vernier Sprockets are the ultimate fixed-timing solution. Designed to completely replace the failure-prone VCT system, they utilize 12.9 grade high tensile bolts and our custom billet Belleville Washer system to lock your timing in place securely, eliminating the risk of bolt loosening under high-RPM harmonics.
2. Engineered for Accuracy
We designed these gears to be robust enough for 1500hp+ drag cars while remaining precise enough for street tuning.
- Precision Machining: Features a chamfered gear teeth profile to significantly reduce noise, wear, and vibration.
- Stepped ID Design: Internal diameters are stepped to ensure perfect concentricity, preventing gear misalignment.
- Large Adjustment Range: Enough range to cover all engine setups and powerband goals.
- VCT Elimination: These are NOT VCT compatible. They are designed to delete the system entirely for maximum reliability.
Tech Specs
Material: CNC Billet Steel
Hardware: 12.9 Grade Bolts + Custom Billet Belleville Washers
Compatibility: All Ford Barra DOHC (BA-FGX) - Replaces VCT
Included: 2x Sprockets, 2x Belleville Washers, High-Tensile Hardware
⚠️ Torque Specs
- Main Center Bolt (M10): 55 ft-lbs (72 Nm) - Use Loctite 222.
- Outer Adjustment Bolts (M6): 13 ft-lbs (17 Nm) - Use Loctite 222.
- VCT Deletes: This kit replaces the VCT gears. If your engine currently has VCT solenoids, you will need our VCT Delete Kit (sold separately) to block the oil feed.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy