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| 1.9:1 High Ratio Roller Rocker Arms | ||
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FIT Promotional Price $670 (inc. GST) |
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The complete 1.9:1 High Ratio Roller Rocker Arms comes with:
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| * Sold on Core Exchange Basis (Your original rockers must be returned to FIT after installation) | ||
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Shipping available to all regions in Australia |
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| Higher Ratio Rockers Increase Power and Torque | ||
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FIT 1.9:1 High Ratio Roller Rocker Arms increase Bottom-End Torque, Mid-Range Punch and Top-End Power with absolutely no loss in sophistication, refinement, idle quality or driveability. By increasing the Holden Factory standard rocker ratio from 1.65:1 to 1.9:1 on both Ecotec and Supercharged V6's FIT have managed to improve the entire Power Band and Torque Delivery similar to a cam swap but with no where near the work or cost involved. We often see gains of 10-20kW, with the majority recording 13-16kW from simply swapping the stock rockers to our 1.9:1 High Ratio Roller Rockers. FIT's 1.9:1 High Ratio Roller Rocker Arms are easily installed by the DIY installer or General Mechanic in around 1-2 hours and requires no special tools or knowledge to install. It's as simple as removing rocker covers, unbolting existing 1.65:1 ratio rockers and just bolting the new 1.9:1 ratio roller rockers in place. Easy! The following Dyno Graph is from a VX Supercharged XU-6 with FIT 1.9 Rockers and 10 Psi Boost Upgrade: |
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| How do they work? | ||
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By increasing the Rocker Ratio we effectively increase valve lift by approximately .080". Typical valve lift with factory 1.65:1 rockers measure 0.412" intake and 0.406" exhaust therefore increasing the valve lift by simply swapping your standard rockers to FIT's 1.9:1 Higher Ratio Rockers will realise increased valve lifts to 0.492" intake and 0.488" exhaust. This increased valve lift improves airflow into the cylinder and thereby create more Power and Torque along with improved Revability and Smoothness. The increased valve lift gives very similar results to a cam swap but with nowhere near the work or cost involved. There are usually many ill side affects associated with a cam swap, such as rough idle and poor fuel economy. This is mainly due to the fact cam swaps change lift and duration, leading to a loss of static operating compression at low rpm. Upgrading the rockers to a higher ratio Only Affects Lift, not duration, therefore there aren’t any of the typical rough idle and poor fuel economy issues that are usually associated with camshaft installations. Typically a camshaft upgrade for the Holden V6's is a cumbersome and expensive job. The usual process involves engine removal, upgrading valve springs, professional cam dial-in, timing cover seal, top end gasket set, 12 hours labour, plus the cost of the cam. After all the above, you wouldn't expect any change out of $2,200. Combined with the previously mentioned side effects, it's no wonder why our FIT 1.9 High Lift Rockers are such a popular choice over the traditional cam swap. The following Dyno Graphs are from V6 Ecotec's and Supercharged V6's fitted with FIT's 1.9 Rockers, before and after with no tuning. Look at the impressive improvements in Power and Torque in both examples, simply from installing the FIT 1.9 Rockers alone!! |
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| Competitive Comparison | ||
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We have been asked on many occasions what's the difference between FIT's 1.9:1 High Ratio Rockers and brands of Rockers. The biggest difference with FIT's 1.9 Rockers is we have the highest ratio of lift of any rockers available in Australia. There are competitor 1.8 and 1.7 ratio rockers, but every increment of lift translates to extra Power and Torque, so that's why FIT's rockers win hands down every time on back-to-back comparisons with other rocker brands. Check out the following Before and After Dyno of an "Independent Test Study" by Ryan with an Ecotec V6, who took the initiative to test the Brand 'x' 1.8 Rocker vs. FIT's 1.9 Rockers and record the results. The difference in power is outstanding and the owner was most impressed how much better the FIT 1.9's performed over the Brand 'x' 1.8's. We have seen this many time with Dyno Competitions and ¼ Mile Times. All around Australia FIT 1.9:1 High Ratio Rockers have been proven to outperform all the others! |
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| 1.9:1 High Ratio Roller Rocker Arms Videos | ||
| Check out this immaculate VS Calais Series II International Edition belonging to Josh. Josh was involved in the testing of our FIT 1.9 Rockers vs. HS 1.9 Rockers and this is one of the video captures from the testing experiment. The outcome conclusively proved the FIT 1.9 Rockers we yet again the best performing Rockers in Australia by a significant margin. Listen to the awesome sound of this 155rwkw FIT Boost and Rocker Upgraded machine. | ||
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