Adjustable Cam Gear Dual Row Timing Chain 20R/22R/RE/RET
Adjustable Cam Gears are the only way to change cam timing on 20R, 22R, 2RZ and 3RZ series Toyota motors and still be accurate. Both single and double adjustable camshaft gears are available from LC Engineering.
Adjustable cam gears are generally used to correct camshaft timing after the head has been milled or when the block is decked. Cam gears are an effective way to dial-in a camshaft by advancing the cam for low-end power or retarding the cam for top-end power.
Adjustable cam gears can be used with mechanical fuel pumps by machining the concentric fuel pump drive to clear the 3 separate 10mm bolts on the adjustable cam gear. See part number 1021028 This is made easier by reversing the bolts in the cam gear.
If you remove the fuel pump eccentric you must use a distributor drive gear spacer part number 1081025. These spacers are found on most 22RE/RET engines since they use electric fuel pumps.
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