lsx swap need help picking an engine

[cjriojas]

I was just wondering what engine would do best under boost long term. Or if it even matters what liter block i start with.

Take your pick, all about the same. The key to longevity is in the tune so you should have it live and dyno tuned for max potential.

Also is a $1000 a good price for a 4.8 pullout with 30k miles? No harness or computer, has manifolds intake accessories and oil pan.

terrible price, id give 400 for it. you can find 6.0s for that

[zane-O]

Take your pick, all about the same. The key to longevity is in the tune so you should have it live and dyno tuned for max potential.



terrible price, id give 400 for it. you can find 6.0s for that

Alright thanks for the info. Do you have any suggestions on where to dig for a good pull out engine?

[kerrige]

Alright thanks for the info. Do you have any suggestions on where to dig for a good pull out engine?

Car-part.com


you need fuel system to support boost. Injectors and fuel pump are the basics.

I would suggest a good boost cam, hardened pushrods, LS7 lifters(if gen III motor), good valve springs, trunion rocker upgrade, ls2 timing chain or better timing chain, and ls6 ported oil pump. If you plan on more than 12lbs of boost head studs would be a good investment.

A well built transmission is a given and rearend upgrades as well.

You will most likel need Efans to clear a turbo setup.

As you can see the list goes on and on, but really depends on your goals, budget, and plans.

[zane-O]

Car-part.com


you need fuel system to support boost. Injectors and fuel pump are the basics.

I would suggest a good boost cam, hardened pushrods, LS7 lifters(if gen III motor), good valve springs, trunion rocker upgrade, ls2 timing chain or better timing chain, and ls6 ported oil pump. If you plan on more than 12lbs of boost head studs would be a good investment.

A well built transmission is a given and rearend upgrades as well.

You will most likel need Efans to clear a turbo setup.

As you can see the list goes on and on, but really depends on your goals, budget, and plans.

Those are the things I was wanting know about for longevity. How well would the stock rods and pistons do? I've heard where all the ls cranks are good for 800ish horse.

[cjriojas]

Am I better of just starting with a block or should I get the whole pullout so that everything is there? This is where I'm on the fence.

For what my opinion is worth considering i have never done a swap, a pull out with as much stuff on it, specifically the harness and PCM, is the best starting point.

Those are the things I was wanting know about for longevity. How well would the stock rods and pistons do? I've heard where all the ls cranks are good for 800ish horse.

Ask Botlfed about the longevity. He sprayed a 300 shot of nitrous out of the hole to a stock bottom end 5.3. We had polls going on to see when he would finally blow it up but it held

[kerrige]

Those are the things I was wanting know about for longevity. How well would the stock rods and pistons do? I've heard where all the ls cranks are good for 800ish horse.

Lots of big power builds on stock bottomends. Need to gap the rings for boost at high levels and rod bolts are good as well. Later 4.8/5.3s have beefier rods.

[zane-O]

Lots of big power builds on stock bottomends. Need to gap the rings for boost at high levels and rod bolts are good as well. Later 4.8/5.3s have beefier rods.

I was looking at the newer 5.3's and its hard to find them with out afm.. there is so many different was to do an ls engine it hard to decide on something lol.

[zane-O]

Lots of big power builds on stock bottomends. Need to gap the rings for boost at high levels and rod bolts are good as well. Later 4.8/5.3s have beefier rods.

What years of 4.8 or 5.3 are the ones to opt for? I'm thinking 4.8 with 6l80 lil turbo action and still get good mpg

[RPM Graphics]

Also is a $1000 a good price for a 4.8 pullout with 30k miles? No harness or computer, has manifolds intake accessories and oil pan.

that's really high.

But that engine does not have the ls6 cam or ls6 heads right?

just the intake

[zane-O]

zane-O=RPM Graphics;508568]that's really high.



just the intake[/QUOTE]

Is an LS6 engine that much more than an ls1? Wouldn't the ls6 be worth it?