IMO,I like the higher lift cam regardless if the heads are stock or not.

 

See the difference between us is that I'm posting actual facts and evidence to support my opinion you just keep telling me how your truck runs 12's. And so what if my ideas are similar to Erics? How are you any different copying ap2002's setup? Should I be talking to to AP2002 instead of you?
The problem with your argument is that you're just telling me about one truck....your own. You have no factual evidence why I'm wrong or why you're right. You just keep posting about how much time you've dropped with each mod

I know you dropped 7/10's of a second with your cam, but do you honestly think you wouldn't have dropped time if you ran a 226/226 with .550 lift? You keep saying you dropped 7/10's of a second with your cam but it doesn't support your argument at all. Explain to me scientifically why you dropped 3/10's of a second with heads if the stock ones flowed so well(I know the answer, but I'd like your take on it)?


-BlueCajun runs a .551 lift cam, V8 has a large duration cam with a bigass stall. AdrenalineP got deep into the 13's with a z06 cam! The fastest rcsb 5.3L truck and the fastest ecsb n/a 5.3L trucks run .550 lift cams.

-According to your theory everybody should be running .650 lift cams right because then the valves would stay open longer?

-Obviously lift gives room to grow. That's the whole point of going with a larger cam....to gain the most performance out of aftermarket heads.


So next time you respond, educate me with something of actual scientific or factual evidence or something other than your own truck that proves me wrong.

And to clearify. My arguement has never been that everybody should be running .500 lift cams with stock heads, but that it is excessive to run anything over .550 lift.

 

I do too. I'll never pick a cam with lower lift, but it's fun to talk about this kinda thing.
I run a 224/224 .564/.564 lift cam.

 

I like TX Silverado's points.. it does indeed make sense to the common man.. granted maybe a chart will show that u might lose a CFM or 2. But if ur getting more power over all compared with a smaller cam whats it matter? u both have pretty good points. And despite everything I've heard and been told to do I took my own route and should be getting my Lunati 221/221-114LSA here in a couple days. Now I have more stuff to do to get my biggest advantage but I think with a more bad *** idle and all it'll tickle my fancy a little longer.. simply my thoughts.. call me wrong or right its just me

 

man sounds to me like we have some head flowbench racing going on here!! sounds alot like those guys who try and race each others dyno graphs and all i hear is "look at my peak hp!!" "no no look at my area under the curve!!"

what it comes down to is in the end everyones setup is going to work different. i would love to see someone take the same duration cams on the same truck one with .500 lift and one with .600 lift and race em. just for grins. i would like to think i know what would happen but i'm not sure. they way it seems to me you get your peak flow at .xxx and so if your springs can take it and there is enough piston to valve clearance get a cam with lift that is .xyz higher than the .xxx one. you pass the peak area of lift twice. more area under the curve maybe? hahah or volume in this case but i always liked that argument better.

 

i actually had the cam speced out before AP got it. it was based on the tr224 and the tsp228r. i didnt give him the specs, he just happened to feel the same specs. he was the guinea pig on that so i was the guinea pig on the heads...which i think anselmo is getting soon. ill probably be the guinea pig on the fast 90/90 as soon as my trucks paid off.

some enjoy looking at pieces of paper, some dyno numbers, and others look at track results. im not interested in re-inventing the wheel. ill look around and see what works and do it myself. in the end its all theory. different flow benches will show different things, different altitudes will net different results.

your flow sheet doesnt convince me any about not going over .550 lift on stock heads. it helps support your argument but there are tons of arguments that may say otherwise. i say study up and do what you feel is best.

i threw in a "to an extent" disclaimer in my post somewhere hahaha

 

I think you're missing my point man. I never said anything about duration. I was talking STRICTLY about valve lift, and once again I'm not even saying you won't gain any power with the same grind but a different valve lift. But it just seems hilarious when people talk about getting a 220/220 with .640 valve lift and running $400 dual springs thinking the higher lift will net them gobs more power. **** put that $300 you'll save using single valve springs towards a new set of heads. I'd be willing to put money on it that you will be lucky to see 5 rwhp using a cam with .650 lift over a cam with .550 lift, and that right there is my point. Some people think that's a big difference, but that number is going to be peak hp and not across the board.

So please don't take my statements to be more than they are.

Bottom line: On stock heads, anything over .550 isn't worth the headaches of upgrading your valvetrain to dual springs and all that jazz just to gain a couple horse power. My opinion of course

 

damn I like this topic....

to each their own, I like track results, dont care for dyno's at all, according to the dyno I got a 323rwhp. not bad for a 4800#truck running 12.4's!

 

With what setup?

 

ok, i agree .650 is useless unless you have a SEROUS setup, but why not step it up into the .570's or .580's. its not extreem, but it gives room to grow. i never said that .650 is guna be a huge over .550. just take it a hair higher. to each his own.