cam i made of desktop dyno

[riotpolice75]

i been foolin around with desktop dyno. i started out with a 406 and wanted to see how much power i could squeeze out of it naturally aspirated. i ended up with over 550 ft/lbs and a little under 550 hp. i used a set of AFR 190\'s, a dual plane, and large tube headers. when i started out i had about 450 or so ft/lbs. so i started in on the iterator and let the motor pick its own cam. heres what i came up with:



specs @ 0.050:

intake centerline - 108º

lobe center angle - 115º

intake duration - 237º

exhaust duration - 254º

lift at valve 0.550 - intake and exhaust

IVO - 10º IVC - 46º

EVO - 69º EVC - 5º

valve overlap - 23º



looking at the numbers its a hell of a cam. peak volumetric efficiency is 109%

the same cam on a 383 produces a 105% peak VE and 106% peak VE on a 350.



my question is how well would this cam work on a real motor? and how would it idle?



if anyone has deaktop dyno on here put those numbers in and look at the graph.









smith

[mrbigshot]

is that the duration @.50?

[riotpolice75]

yea







smith

[mrbigshot]

advertised duration 296 intake 313 exaust. *edit* the more and more i look at it the more it looks like a killer n2o cam.



it would need 12.1 compression or better, around a 3800rpm stall, 4.33/4.56 gear. racy idle.



if it were me i would tone down the exaust duration a bit. if you are going to be using heads that flow very well on the exaust side it will over scavange and actally lose power. if you were building a bigblock ford it would be good.



i would drop it back to around 243 duration @ .50.



if it was a roller lift could be closer to .600 without hurting it to much. .525-.560 on a flat tappit mech



idle would lope a little more than this one (http://www.compcams.com/Base/MultiMedia/SoundBytes/CompCams292.mp3) this cam is actually idlding very high, it will thump pretty good with it dropped a little.

[coppergmc]

That program is great for picking general trends. It doesn\'t always work out in real life.



Did you use a flat tappet or a roller? From the duration at .050 and the .550 lift it looks like a roller. I like using cams with 106 to 104 LDA and with the intake setup at 4 degrees advanced in 383s and 400s. Herbert has a solid cam (c5h) I think that works great in these engines. It will be the cam that says, \"proven winner at the track\". Plug this cam in and see what you get. copper