Benefits of VVTi

For those of you who may be wondering how effective the cam phasing of modern motors may be we have done some dyno comparisons. Our baseline was done on a 2012 Coyote 5.0 engine utilizing a Vi-PEC V88 ecu. The motor is running in speed density mode. Being there is no need for a MAF sensor in this configuration we have used a simple smooth mandrel bent intake pipe with a K&N cone filter. Headers are long tubes made in house with 1 1/2" primaries.
In their parked position I can turn the idle down to 375 RPM and it will idle there completely stable without stalling. On our first dyno pull we left the cams in their parked position. The result was 322.2 HP. For our second run We started with the intake cams advanced 38 degrees slowly tapering to 30 degrees at peak power and the exhaust cams retarded by 1 degree increasing to 20 degrees at peak power. Have a look at the results.

These runs were made on different days so there might be minor differences in power output because of this. That being said 100 hp is pretty respectable for NO changes to engine configuration. Pretty exciting stuff.