Cylinder pressure? Help.

Tracy,
thanks for the reply. I have noticed that some people seem to think that a discussion of substitive information is called thread killing. Since I am new to all of this I don't understand that.

Your'e correct about the Hp & Tq numbers Rathar than using the words above and below I used the symbols < & > greater than, less than, a force of habit, my apologies.
As th Hp increases above the apex of the curve usually the Tq decreases before the apex. A normal trade off in design.

Here are the specs on the two cams:

XE285HL;part# 20-228-4, RPM range 2500-6500, valve timing .006, lobe center 110, intake centerline 106, adv duration 285/297, dur @.05=241/247, valve lift @1.5:1= .545"/.545", lift @ 1.6:1= .581"/.581" (what I'm using)
IVO=37, IVC=69, EVO=83, EVC=35

XE295HL; part#20-229-4, rpm range3000-6800, valve timing .006, lobe center 110, intake centerline 106, adv duration 295/307, duration @ .05 251/257, valve lift @ 1.5:1=.564"/.564", @ 1.6:1=.601"/.601", IVO=42, IVC=74, EVO=88, EVC=40

I will tell you, that so far only the most agressive roller cams can match the numbers for these two grinds. I do not want to go that route when flat tappets will produce these kinds of results.
I included the timing events so you can also look at the DCR and Cranking pressures created.
It was the DCR created by the 295 that has me selecting the 285. More in line with the design goals.

The only thing that really causes the numbers to go off the chart is the numbers for the new Brodex head for the SB LA motor.Thay went up into the mid 600s with no other changes.Right now they are simply not in the budget.

Hope this helps, let me know
Andrew