big hammer

Cruising?

Tuskyz28

That's right but wait.... big hammer might want to leave the stop sign at 6k rpm and shift his motor at 7500 to the next red light.

redtan

iTrader: (5)

People put them on the wrong engine eg. 4" bore stock stroke LS2, then cam them wrong and that's a perfect recipe for an underperforming setup.

Put then on the proper bore with a proper cam, and wind them up to where they really shine and then you got something special. But most people don't quite get that, so they do what I said in my first example then drive the car on the street at 2000rpm and complain it sucks thus the heads suck.

Tuskyz28

http://www.hotrod.com/articles/ccrp-1208-ls-cathedral-port-vs-square-port-heads/

Very interesting on how the results turned out.....

big hammer

800 hp NA 6.2 with stock ls3 castings with a mild 12.5:1 compression!

http://www.yellowbullet.com/forum/sh...1250106#/enter

big hammer

How much torque do you need for cruising?

KCS

iTrader: (20)

Cruising and pretty much any acceleration, like to get on an on ramp or to pass someone, without getting into speeds that you would go to jail for.

big hammer

This is pretty much it, IMO

big hammer

how much torque do you need for that?

KCS

iTrader: (20)

...and peak torque at ~6400RPM...

KCS

iTrader: (20)

As much as I can get, especially with a smaller stock stroke combo and a manual trans.

big hammer

Exactly that's badass

big hammer

So you don't need that much? Fbodies stock had tall gears stock and not much low end torque. They seemed to get around fine

big hammer

This is kinda interesting. I actually expected the ls2 to make a little more low end than the ls3 but it doesn't

KCS

iTrader: (20)

Nevermind. I realize there's no point in arguing with you. I just know that I enjoyed cruising around in cars with a lot more low end torque than cars that didn't seem to come alive until 3500RPM. Maybe you're different. Maybe you like buzzing up to 5500RPM to pass a soccer mom in her minivan. Different strokes for different folks as they say.

redbird555

iTrader: (14)

So you build a race motor to drive around below 4000 rpm? Huh lol

big hammer

It a was a simple question. Whether you have 325 ft\lbs down low or 300 for cruising I would think either would be fine.

redbird555

iTrader: (14)

Pretty sure a stock ls1 could pass a soccer mom in her mini van. Let alone a cammed rectangular motor

LLLosingit

iTrader: (4)

I don't know about you but most people wouldn't notice a difference between then two while cruising and other than from a standing start the LS3 heads are going to shine over stock cathedral ports everywhere else. I know when I really want to pass someone quickly I downshift and bring the revs up.....Right where the LS3 heads start making more power.
That being said I have one engine with cathedral ports (AFR's) and another with rectangular ports (321's) but both have roots style superchargers on top of them so torque down low is not an issue.

Rise of the Phoenix

iTrader: (27)

I have to disagree with you on that point. Anyone who drives their car and knows their car is going to be able to tell that difference.