When do you change the camshaft on a Honda D16a?
The intake valve diameter was 30 mm, exhaust valves diameter was 27 mm, valve stem diameter was 6.5 mm. In 1988, camshafts were replaced with more dynamic ones, the compression ratio increased to 9.5; all this provided extra 5 HP. The camshafts are rotated by the timing belt to be replaced after every 60,000 miles of mileage.
Which is more aggressive performance Cam or stock Cam?
Popular folklore would have you believe that performance cams are more aggressive than stock cams. They must be more aggressive, because they have more lift. Wrong, wrong, wrong! Lift has nothing to do with it. You can have a lazy slow opening cam with a lot of lift simply because it has a lot of duration.
What are the specs for a Honda D16a engine?
Specifications of its camshafts are as follows: duration 222/224 deg, lift 8.46/9.2 mm. The compression ratio decreased to 9.1, the size of the intake valves was reduced to 29 mm, and of exhaust valves – to 25 mm, the valve stem was thinner and its diameter was 5.5 mm. The power was 110 HP @ 5,600 rpm, and the torque was 136 Nm @ 4,800 rpm. 4.
What’s the best cam profile for a racing engine?
If you are uncertain as to which cam profile best suits your needs, please contact our technical support staff at 619-661-6477. Level 5 camshafts are designed for fully prepared, high compression, all-out racing engines and chassis.
What kind of camshafts are best for drag racing?
Mild porting and larger valves will improve performance. Level 4 camshafts are designed for heavily modified engines. These camshaft have a definite lope at idle and are best suited for dual purpose hot street/drag strip, hot marine or oval track applications. These grinds exhibit strong mid-range to top end torque and horsepower.
What is the performance level of a camshaft?
Performance level – Stage 2 – Forced Induction Special – Designed specifically for turbo or supercharged engines. Short duration reduces overlap, for more cylinder pressure. Performance level – Stage 1 – Features far more aggressive ramp rates than stock with added duration. Idle lobes remain same as stock.
Popular folklore would have you believe that performance cams are more aggressive than stock cams. They must be more aggressive, because they have more lift. Wrong, wrong, wrong! Lift has nothing to do with it. You can have a lazy slow opening cam with a lot of lift simply because it has a lot of duration.
Why are roller camshafts used in racing cams?
The bearing rides on the camshaft lobe eliminating much of the friction and allows for smoother lifter to lobe contact. Roller camshafts are available in a wide variety of profiles. These profiles have faster ramp rates or lobe acceleration for quicker valve opening and closing.