XTrooper

And my Cam Motion cam.

223/227 .566/.567 112

272/277 advertised duration @ .006"

lobe intensity = 49.5

If you use the lobe intensity formula on split duration cams, you add the totals and divide by two to get the solution.

Total advertised duration (223 + 227 = 549) - total duration @ .050" (223 + 227 = 450) / 2 = lobe intensity (49.5)

blkZ28spt

1. How do you know exactly what words they used? Did you also call them? I didn't think so.

2. "Easy" and "soft" in this context mean the SAME thing. What we were told is that they said they were "easy".



Got anything else to conjur up?

nuzee

iTrader: (2)

Thanks 02Reaper

updated list:

stock cam (.004)=86.5/78.9 (calculated from JRP's intake/exhaust specs)
Crane cam (.006)=62
Comp XE (.004)=53
Cammotion (.006)=50
Comp XER (.004)=49

Note that I am just listing them by intensity number & not taking into consideration the difference between the lift measurement points. Also, I'm having a bad case of Monday morning blahs that's carrying over into the afternoon. Can someone double check my numbers, thanks.

PREDATOR-Z

Actualy this cam has different intake /exhaust intensity, minor but different

(.006 lifts-.050lifts)= rate intensity variance >
Intake> 272-223= 49 which is eaqual to an XE-R rate or similar
Exhaust> 277-227=50 which is a tad slower but faster than XE which is 53.

Nozee all the cams should be at .006 to compare rate intensity variance.

XTrooper

Correct, but I figured the average of 49.5 would be "close enough."

nuzee

iTrader: (2)

No question about that here. More guys that cam-doctored their cams need to post up to make a true comparison. I'm just trying to organize whatever information is available. People can draw their own conclusion from the information as they like.

updated:

stock cam (.004)=86.5/78.9
Crane cam (.006)=62
Comp XE (.004)=53
Cammotion (.006)=50; 49/50
Comp XER (.004)=49

XTrooper

nuzee: I think the reference points (.004" and .006") got reversed in a couple of places on the list. Unless I'm mistaken (I could be), Crane's advertised duration numbers are based on the .004" mark and Comp Cams uses .006" to calculate theirs.

XTrooper

P.S.- This is why the Cranes appear less intense in comparison. Advertised duration numbers based on the lower lift point of .004" will create larger advertised duration numbers than at .006". These larger advertised duration numbers, when used in Harvey Crane's intensity formula, create a higher number/less perceived intensity.

PREDATOR-Z

Nice one but looking closer now you can see that the Cammotion has different rates int/exhaust and that alone can explain a littler about their exemplary behaviour

XTrooper

I agree and you bring up a very good point. The slightly different ramp rates may very well play a part in their performance.

d james

So If in fact the crane cam does have an agressive cam similar to other cam companies (not sure if that is the case, since some of this jargon goes over my head) why does it require spring changes much later-50k compared to 15-20k like thunder racing told me about their cam TR224

blkZ28spt

Honestly I wouldn't believe anything the guy told you first time you called. I'd look into it more, get a response from the guy who posted the info earlier. I highly doubt you can get 50k+ miles from springs with an aggressive cam........

XTrooper

I don't think I'd try this either.