Im looking on getting some extra ponies by upgraded my top end
but i need to know what is the max lift and duration that i can get with the stock bottom end? dont wanna have a make out session between the valve and piston.

 

Valve springs are the limiting factor initially. .480 lift (total) is all ya get without new springs and such. How bizarre do you want to get? Keep in mind, the cams with the huge lift/duration numbers are geared for higher RPM power, exactly the opposite of what you want in a truck, unless you are building a dedicated mud-runner.

 

well I diffidently want low to Mid range POWA! those EQ heads that you recommended seem nice but im not sure if i should get the Monster EQs with .600 springs along with a Monster cam and be okay with piston to valve clearance. Now cam wise, if i get the Monster EQs than im obviously going for lift. I do wanna get a BIG cam to compliment the heads but if It has to rev up to 5K+ rpms to hit the sweet spot (just about where the shifting points are) than maybe i should look at another approach?? get the other heads (the Odessa EQs with .512 lift)?? maybe custom cam grind for the EQ heads with .600 springs?? What combo would you guys recommend that will work well with my stock bottom end and current mods??

P.S I drive the beast to school every other day so it needs to be street friendly

 

For bottom end grunt, stick with the 1.92 intake valves. Since you have the air gap manifold.... pick a cam that has its operating range starting anywhere from idle, to about 1000 RPM, and upper limit wherever it happens to fall. You are more interested in where the cam STARTS to make power, then the top end. The .512 lift heads is probably all you will need. The huge lift cams are for upper RPM power.

 

ahhh ha, ok... it makes sense now... and besides the .512 lift heads are cheaper too ... what do you think of this cam for the .512 lift heads? http://www.hughesengines.com/Index/p...=&partid=11430

 

Well, that cam, with the stock rockers, (1.6 ratio) is RIGHT at .512 lift...... You would be at the max for those valve springs. Now, granted, I would like to think that there is some 'margin for error' built into those...... but, that would be something I would most certainly check before firing the engine. Coil bind is never pretty. Things go boom......

Aside from that minor detail, Looks good. (regrind though..... so, one would think that was done on a smaller base circle, may wanna ask if adjustable rockers are required for that.

 

^^^ Yep

$199.00 for a regrind, thats a rippoff, I get my regrinds for a $100. Spend another beaner and get a new cam. The lift on that cam for exhaust is .520 so bigger springs are needed

 

What about this cam with 1.92 valve heads?http://www.compcams.com/Company/CC/c...?csid=660&sb=2
Not to high jack the thread but i didnt want to start a new one and ask the same question. My plans were .030" over 9.5:1 compression with the 1.92 odessa heads and this cam. Would that work for low end?

 

"and computer modifications".....

"Stock springs cannot be used."

Two things to note there...... seems it would require a custom tune, and better valve springs.

 

I've got an sct and new springs are a given. I mean would that be a good cam choice?