{"product_id":"atomic-high-rev-hydraulic-lifters-anti-pump-up","title":"Atomic High Rev Hydraulic Lifters | ‘Anti Pump-Up’","description":"\u003cdiv class=\"atomic-section\"\u003e\n\u003cdiv class=\"atomic-grid\"\u003e\n\u003cdiv\u003e\n\u003ch2\u003eThe LIMIT OF Standard Lifters\u003c\/h2\u003e\n\u003cp\u003eStandard hydraulic lifters are designed for smooth, gentle operation. When you introduce aggressive camshafts, harsh rev limiters (we know you love it), or high RPM, the valvetrain movement becomes sudden and violent. A standard lifter cannot discharge oil fast enough to keep up with these shocks. Instead, it \"pumps up,\" holding the valve slightly open. This causes loss of compression, severe valve float, and potential piston-to-valve contact.\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e💡 DID YOU KNOW?\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eCam geometry matters.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhile Atomic and Crow Cams are engineered with smooth ramp rates, many aggressive aftermarket profiles have harsh geometry that \"slaps\" the rocker arm sending shock to the lifter. Combined with the shock of a hard-cut rev limiter, this forces the lifter to act like a solid strut if it can't bleed oil instantly. Our lifters feature\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDouble the Relief Rate\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto handle exactly this scenario.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe Atomic Solution\u003c\/h2\u003e\n\u003cp\u003eAtomic High Rev \"Anti-Pump\" Lifters are engineered with modified internal valving that provides a significantly faster bleed-down rate—approximately double that of a standard unit. This allows the lifter to discharge oil instantly under sudden valvetrain shock, maintaining the correct zero-lash tolerance without over-extending (pumping up). It is the ultimate hydraulic solution for engines spinning to 8500rpm+.\u003cbr\u003e\u003cbr\u003eWe hand check every lifter here at Atomic HQ Sydney, AUS before etching them \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/5548\/1713\/files\/Atomic_High_Rev_Hydraulic_Lifters_Ford_Barra_DOHC_Anti_Pump-Up_Atomic_High_Rev_Hydraulic_Lifters_Ford_Barra_DOHC_Anti_Pump-Up.jpg?v=1757581124\" alt=\"Atomic High Rev Hydraulic Lifters – Ford Barra DOHC | ‘Anti Pump-Up’\"\u003e\u003cbr\u003e\n\u003cdiv class=\"img-caption\"\u003eHigh-flow valving prevents pump-up at high RPM.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"atomic-section\"\u003e\n\u003cdiv class=\"atomic-grid\"\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\n\u003cdiv class=\"img-caption\"\u003eStable valve control, even on the limiter.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003e2. Engineered for Abuse\u003c\/h2\u003e\n\u003cp\u003eWhether you are drag racing or drifting, your engine spends its life at the limit. These lifters are built to survive it.\u003c\/p\u003e\n\u003cul class=\"atomic-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Discharge:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe internal metering valve is calibrated to bleed pressure quickly during \"lofting\" events, ensuring the valve returns to the seat fully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRev Limiter Safe:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSpecifically designed to handle the hydraulic shock caused by aggressive ignition-cut rev limiters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCam Compatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhile ideal for Atomic cams, they are\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eessential\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003efor aftermarket cams with aggressive\/harsh lobe profiles to prevent valvetrain separation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Atomic","offers":[{"title":"Default Title","offer_id":46869965570206,"sku":null,"price":577.87,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0323\/6482\/2661\/files\/Atomic_High_Rev_Hydraulic_Lifters_Ford_Barra_DOHC_Anti_Pump-Up_Atomic_High_Rev_Hydraulic_Lifters_Ford_Barra_DOHC_Anti_Pump-Up_2000x_478acf2f-dcf9-413a-9a3d-32b0c6e731b7.jpg?v=1779532173","url":"https:\/\/www.performanceheaven.com.au\/products\/atomic-high-rev-hydraulic-lifters-anti-pump-up","provider":"performanceheaven","version":"1.0","type":"link"}