Camshafts are always an interesting discussion because there are so many ways they can be ground, and likewise, many different results can come from them. One of our Purple Belt Performance Package customers was interested in seeing what a set of the Stage 1 cams, springs, and retainers could do before jumping all the way up to the Brown Belt Package.
As we expected, this cam upgrade resulted in the engine making slightly less horsepower and torque below 4,800 rpm. However, the power gains started at 5,300 rpm, and kept increasing as engine speed rose. If you’re only concerned with peak numbers, you’ll see that the power only increased from 638 whp to 640 whp. Instead, focus on the graph at 6,000 rpm and you’ll see 10 more whp. At 6,500 the gain was 20 whp, and at 7,000 rpm it’s typically 30 whp (although we didn’t spin the engine that high on our baseline pull). These are significant gains that can be felt driving the car and will produce REAL results both on the street and at the track.
You might read into this and think that the car must be slower since it has less bottom end power than before… but wait! Once you consider the fact that the engine speed is nearly always above 5,500 rpm at WOT, you realize that any time you’re at full throttle with these cams, your engine will be producing more power!
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