Скачать с ютуб Mastering RB25 Neo Cam Timing: Step-by-Step Guide for Precision Tuning в хорошем качестве

Mastering RB25 Neo Cam Timing: Step-by-Step Guide for Precision Tuning

Join Josh from Kelford Cams as he walks you through the detailed process of cam timing on an RB25 Neo engine. Learn how to measure true TDC, set up dial indicators, and calculate camshaft duration and centerline. Whether you’re working with a factory VCT cam gear or an aftermarket option, this step-by-step guide ensures your camshafts are perfectly dialled in for optimal performance. SETTING TRUE TDC: 1 - Attach the degree wheel. (This measures the amount of degrees of the crank rotation.) 2 - Insert dial indicator into #1 spark plug hole. (This measures piston position when setting true TDC/ Top Dead Center.) 3 - 0 pointer on the degree wheel. 4 - Turn degree wheel 0.050” before TDC/ Top Dead Center and note down the number BTDC/ Before Top Dead Center. 5 - Turn degree wheel 0.050” after TDC/ Top Dead Center and note down the number ATDC/ After Top Dead Center. 6 - Calculate the degree of your numbers and note if there are any imbalances in the amount. If any numbers are out, adjust the degree wheel pointer accordingly and repeat steps 4 and 5 to ensure the result is now correct. DEGREE INTAKE CAM SHAFT: 1 - Set up dial test indicator (DTI) onto intake bucket. (This can be a bit hard to place correctly due to space, so take your time.) *Make sure the DTI is straight up and down as it can cause a discrepancy with the results if it is angled. 2 - Turn degree wheel until DTI is showing 1mm (0.040”) of lift and note down the number ATDC/ After Top Dead Center, which is the opening number. 3 - Turn degree wheel up to peak lift, come back down to 1mm (0.040”) before the valve closes and note down the number ABDC/ After Bottom Dead Center which is the closing number. INTAKE CAM SHAFT MATHS: 180° opening degrees BTDC/ Before Top Dead Center closing degrees ABDC/ After Bottom Dead Center = Intake duration / intake duration by 2 Opening degrees BTDC/ Before Top Dead Center = Intake centerline DEGREE EXHAUST CAM SHAFT: 1 - Set up DTI onto exhaust bucket. 2 - Turn degree wheel until DTI is showing 1mm (0.040”) of lift. 3 - Count numbers up from BDC/ Bottom Dead Center (180°) to point on the degree wheel and note down the number BBDC, which is the opening number. 4 - Go all the way to peak lift and back down to 1mm (0.040”) before closing and note down the number ATDC/ After Top Dead Center which is the closing number. EXHAUST CAM SHAFT MATHS: 180° Opening degrees BBDC/ Before Bottom Dead Center Closing degrees ATDC/ After Top Dead Center = Exhaust Duration / Exhaust duration by 2 Closing degrees ATDC/ After Top Dead Center = Exhaust centerline #CamTiming #rb25neo #enginetuning #KelfordCams #CamshaftSetup #VCTAdjustment #performanceengineering 00:00 Introduction 00:39 Setting true TDC (Top Dead Center) 03:26 Degree intake camshaft 07:02 Degree exhaust camshaft 09:25 Results