Not all VVT uses the same method for varying timing. VTEC is trademarked by Honda and it varies the lift by using different cam lobes. You can vary the lift without changing the valve timing and you can also vary the timing using the same lobe, without changing the lift by using a phaser. Different manufacturers choose different methods. Ktuner changed it based on ideal performance over the power band. Vtec is intended to account for power drop off at high RPMs, pushing the activation lower would net no benefit, or actually hamper performance. You can look at the power maps from their dyno and see they "did it right". OP. Stated from kpro help file: "Do not set the VTEC switch point too low as there will be insufficient oil pressure for the rest of the engine. As a guide do not go below 2000 rpm." "Do not set the VTEC switch point too high as the high speed rocker arm will float on the lost motion spring and damage the valve train. Location. USA. Dec 12, 2015. #1. My 2004 Civic D17A1 engine blew up. I found a D17A2 with 75K miles, very well taken care of with new belts and water pump for $600. My understanding is that I can put a VTEC engine in a non VTEC car without a VTEC computer or wiring harness and the only difference is that VTEC will not work. The two systems, VTEC and VTEC-E are controlling valve actuation and valve lift utilizing solenoids which engage to apply oil pressure to the valve timing system. The variable valve timing system is designed to use re-routed oil pressure to the rocker arm pistons above 2,500 RPM to change the engine’s volumetric efficiency, resulting in Keeping up the tradition of bringing exclusive content for readers, this time too, we have brought an educational video to let you guys know how a Vtec engin Go head and build the bottom end while the B16 is running. Have the bottom end balanced and get an engine girdle like this one KMS Billet Engine Block Girdle B16, B18, B20 LS VTEC - eBay (item 350415562869 end time Nov-27-10 09:52:23 PST). You will need to rev up 10k to make 250 and a well built bottom end it a must. The Camshaft In A Honda VTEC Engine . Now, VTEC can work during the 'air' strokes. Whether during the intake stroke, the exhaust stroke, or both. This is achieved with a special camshaft that 3rGdkjp.

how does a vtec engine work