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Originally Posted by NeedForSpeed
Now that a few have installed intake cams with good success, it seems appropriate to find and compare hard data on these lobes, as well as other lobes that could be used. Driving impressions of different cammed engines should also be included in the thread.
The problem in comparing svx-stock lobes with other lobes is that no standard was used to compare. I asked Delta Cams to find the lift that the svx 236* intake duration and 244* exhaust duration spec was based on. This was measured to be .006" lift. The lift that 'advertised' duration is measured varies from manufacturer to manufacturer. Advertised duration is generally referred to as 'seat to seat' duration.
Once this spec was determined, I asked for the duration on the Nissan lobe, measured the same way. Now, we are much closer to apples for apples comparison.
The Nissan lobe is Delta tool #F327. This is the lobe profile installed by TomsSVX and Chiketkd.
Measured cam specs:
SVX intake lift: .280" Duration: 236*@ .006" lift/ 184*@ .050"
SVX exhaust: .311" Duration: 244*@ .006" lift/ 194*@ .050"
Nissan lobe: .314" Duration: 256*@ .006" lift/ 194*@ .050"
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Good work Ron,  Bin hoping somebody would get the guts on the cam profile.
Looking at the figures, the cam we have been using is a slow opening cam. You can see that it takes an extra 10* to get the valve open. This type of cam is not the best for creating a strong sonic wave. The SVX exhaust profile would work better. Same lift faster opening.
Harvey. 
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