kuzman83
06-12-2010, 11:39 PM
Call me crazy but I recently read an article about a proto daytona with the
16v engine and cam phasing. got me to thinking about how to reliably phase the cams on one of our hybrid motors. please don't flame my idea but input is definately welcome. My idea is predicated on the idea that a DOHC engine makes more low end power and less top end power with an advanced exhaust cam. conversely it makes less low end power and more top end power with a retarded exhaust cam. now... my idea is to fabricate a bracket to mount a spring loaded serpentine belt tensioner that places tension on the timing belt in between the intake and exhaust cams. then fabricate a second bracket for a second "oil pressure sensative" tensioner to be mounted above the regular tensioner (7 o clock position relative to the exhaust cam). obviously you would need a longer belt with a slightly larger amount of slack to allow for the phasing of the exhaust cam. So in theory, at idle, the spring loaded tensioner on the top of the engine would be taking the belt slack thus rotating the exhaust cam forward, as engine RPM increases, the oil pressure sensative tensioner increases it's tension, offsetting the spring, and rotating the exhaust cam counterclockwise/retarded until the belt slack is taken up and all slack is being taken up by the oil pressure sensative tensioner. I feel like this would move the peak torque/power curve much lower into the RPM band and keep it at peak torque/power for longer/further into the RPM band. Any thoughts? I think it could work quite well but I'm not the most experienced guy in the world so lets get this theory off the ground together!
16v engine and cam phasing. got me to thinking about how to reliably phase the cams on one of our hybrid motors. please don't flame my idea but input is definately welcome. My idea is predicated on the idea that a DOHC engine makes more low end power and less top end power with an advanced exhaust cam. conversely it makes less low end power and more top end power with a retarded exhaust cam. now... my idea is to fabricate a bracket to mount a spring loaded serpentine belt tensioner that places tension on the timing belt in between the intake and exhaust cams. then fabricate a second bracket for a second "oil pressure sensative" tensioner to be mounted above the regular tensioner (7 o clock position relative to the exhaust cam). obviously you would need a longer belt with a slightly larger amount of slack to allow for the phasing of the exhaust cam. So in theory, at idle, the spring loaded tensioner on the top of the engine would be taking the belt slack thus rotating the exhaust cam forward, as engine RPM increases, the oil pressure sensative tensioner increases it's tension, offsetting the spring, and rotating the exhaust cam counterclockwise/retarded until the belt slack is taken up and all slack is being taken up by the oil pressure sensative tensioner. I feel like this would move the peak torque/power curve much lower into the RPM band and keep it at peak torque/power for longer/further into the RPM band. Any thoughts? I think it could work quite well but I'm not the most experienced guy in the world so lets get this theory off the ground together!