Obtained a copy of Desktop Dyno 2000 and have been playing with it for a little bit.
I plugged in my combo (as close as I could get) and am curious what the racers and those that are building the Hi-power slants think of the results. The numbers are probably on the high side, but do not seem that far fetched...opinions?
Combo:
Cast crank 225 .080 over
10.07:1 compression (calculated)
1.70 intake, 1.50 exhaust (approximate--can't find my paperwork from the machine shop)--mild porting & gasket matching
Offy 4 bbl intake w/ Holley 390 cfm
Clifford 3x2 headers, true 2.5" duals w/ flowmasters
MSD 6AL ignition, Jacobs 8mm wires, NGK plugs gapped at .055
K&N 14"x3" open element
MP cam, .398 lift, 240 duration, 24 o/l, 106 centerline installed straight up (this tiny cam is killing me )
Desktop Dyno spits out 202 HP @ 4500 and 265 ft-lbs @ 3000. The torque curve is basically flat from 2000 (lowest rpm it shows) to 4500 (The torque numbers here jive well with where my slant starts to pull pretty hard, from about 2700 through 5000 rpm)
Running the numbers with Comp Cams 260H, DD spits out:
230 HP @ 5000
267 ft-lbs @ 3500
Torque curve is flat from 2000 to 5000 rpm.
Using the DD iterator I was not able to come up with much higher numbers using different 'custom' cams...am I approaching the N/A limit with no power adders?)
From what I have read about DD, I expect those numbers are high, but by how much? I eventually would like to hit the 250 HP and 300 ft-lb mark naturally aspirated and w/o nitrous. Am I dreaming or is there something I have neglected to address? FWIW--I am willing to sacrifice the HP goal for the torque goal, as ol' slanty is hauling a heavy truck around with the aerodynamics of a brick.
Opinions please..
-S/6
sup bro catch me at hardy)