What do you guys think???

[migueelw]

I have a stock Ls1 engine with a s/c. Are there any benefits of increasing the displacement of motor verses leaving it stock. I want to increase boost pressure and I was thinking that if I increase the displacement that would mean I couldn't run high boost pressures, oppose to leaving the displacement the same and be able to run a lot more more boost.

The motor will have a forged bottom end either way.

[zero_proto]

more displacement is better, always. More displacement does not mean you can run less boost. It depends on how much power you are looking for. Stock cubic inches is fine, but if you want a little more oomph on the lower end, then more cubes will be needed. What kind of s/c are you running, i figure it's a centri, if so go for more cubes.

[ntimid8r]

You always want more boost. Going bigger cubes means you'll lose boost with your existing s/c and pulley setup. So depending on what pullies you have or what head unit you have....you'll need to step it up. You can make a ton of power on stock cubes. A forged motor can easily handle 15lbs boost and more. So basically boost is what makes power and going bigger cubes gives you more boost capability.....as long as you increase boost to keep up with the cubes. Hope all that makes sense.

If you can afford to go bigger, do it.

[zero_proto]

You always want more boost. Going bigger cubes means you'll lose boost with your existing s/c and pulley setup. So depending on what pullies you have or what head unit you have....you'll need to step it up. You can make a ton of power on stock cubes. A forged motor can easily handle 15lbs boost and more. So basically boost is what makes power and going bigger cubes gives you more boost capability.....as long as you increase boost to keep up with the cubes. Hope all that makes sense.

If you can afford to go bigger, do it.

ooops, forgot about that........

[migueelw]

more displacement is better, always. More displacement does not mean you can run less boost. It depends on how much power you are looking for. Stock cubic inches is fine, but if you want a little more oomph on the lower end, then more cubes will be needed. What kind of s/c are you running, i figure it's a centri, if so go for more cubes.

I'm running the ATI Procharger

[migueelw]

You always want more boost. Going bigger cubes means you'll lose boost with your existing s/c and pulley setup. So depending on what pullies you have or what head unit you have....you'll need to step it up. You can make a ton of power on stock cubes. A forged motor can easily handle 15lbs boost and more. So basically boost is what makes power and going bigger cubes gives you more boost capability.....as long as you increase boost to keep up with the cubes. Hope all that makes sense.

If you can afford to go bigger, do it.

Thanks that give me more insight on what options I have. What are some good manufactures of forged parts?

[typhoon1110]

a larger engine will let you make the same power without working the engine as hard as a smaller engine and at a lower boost level.