Curious how a big split cam like a turbo cam would do in our cars. Seems comp favors a 6* split on most LTX cams. However, I am curious as to how the crane227 210/224 dyno around the same as the hotcam and cc502 even with the faster ramps of the 502? Seems like the the 502 should be a bigger gain but they are about the same and the crane seems do do much better in the 1/4 than the 502. DesktopDyno also seems to show large splits favoring the exhaust to do as well or better than cams with smaller splits. Torque is also better with a lower intake duration and a large exhaust duration with a tiny difference in peak hp over a lesser split?

This is on stock heads with stock head flow numbers as I am sure the results would be different on ported heads. Since our stock exhaust ports are restrictive could designing a blower style camshaft for stock heads be the missing link?

EDIT: It is not so much the split as it is giving more duration to the exhaust that seems to help. The crane seems to be an anomoly of small cams and I am trying to figure out why. Torque is great with this cam b/c of its short intake duration but topend is good too because of the bigger exhaust duration *I think*

Afterall the ivc is 67* on the crane and for example the cc503 has an ivc* of 66 yet no one raves about the torque their car has in the lower rpm's with the 503 vs. the crane even though the 503 closes earlier. Any thoughts on this?

 

DD2000 shows that with a small intake @.50 duration and a large exhaust duration you can build great torque and make great hp. I used 210/250 seems outrageous but works well on DD compared to any off the shelf except the 847 but the torque difference is massive.

 

I don't think DD2000 is really accurate. My numbers were always off until I actually went to the dyno. Afterwards I could always back into the numbers by playing with the CFM ratings and exhaust options. If you have a minute to wait, use the cam iditerater (?). Put in perameters for cam specs and then it will run every combination and give you the top 10 based on HP or TQ, whichever you choose.

 

Get a 500.00 Performance Trends Engine analyzer Pro v 3.3 and ya can enter in anything ya like with a 2to3% accuracy.

Blower cams don't work for N/A because on the early IVC and the lack of duration.

 

I think ya are barking up the wrong tree and thinking that the induction system on these things is better than you think. The exhaust is usually much better. I think ya are just putting that extra exhaust duration in there cause you don't have the rest of the valve events correct.

Bret