5.3 or 6.0?

[Gaspo]

depending on my compression test, i might be throwing out the ls1 and upgrading. what would i be better off with? a 5.3 or 6.0 truck motor? dont have the money for an ls2. which motor is better for boost? which one is more reliable/holds more boost/hp? i can put my 317 heads and stock intake on it.

[1BADAIR]

leak down test. not compression

[c0ncEpT]

317's on a 5.3 get you down to like 8.1:1 SCR. The car will be a roach out of boost but would be able to take quite a bit of boost.

[Gaspo]

leak down test. not compression

oh, compression test wont tell me anything?

317's on a 5.3 get you down to like 8.1:1 SCR. The car will be a roach out of boost but would be able to take quite a bit of boost.

how much boost can it hold? what kinda power can i get out of it safely?

[sman]

I would say you probably cant go wrong either way, but a 5.3 with 317s should take the most boost. If you look at 6.0s stay away from the lq9 thats gonna have a lot higher compression that what your looking for.

[Gaspo]

I would say you probably cant go wrong either way, but a 5.3 with 317s should take the most boost. If you look at 6.0s stay away from the lq9 thats gonna have a lot higher compression that what your looking for.

ok thanks!

[DETROITMUSCLE]

I'd get whatever is cheaper, most likely you'll find an iron 5.3 so the block strength is there for either motor. What size are your turbos?

[Boost Addict]

Leak down will tell you where and how much of a leak you have.

[SS4Matt]

Either one is fine. The 5.3 is a little strong of a block just because of the amount of cylinder wall in there still. When I was looking for an iron block I happened to find my 5.3 the day I cracked my alum block so I went with that and had my car running again in 5-7 days lol

[WMCCjames]

I'd do a 5.3. If I ever hatch my LS1 I'm gonna get a 5.3 and pulley down.

[killa89trans]

yeah, a leak down test will tell you where your leak is, whether piston rings or valves.

[nascarnate326]

I would do a 5.3 as well. 6.0 is too common.

Hell look into a 4.8.

[hoogiesngrinderz]

6.0 too common? 5.3 was the most mass produced genIII engine I picked mine up for $212 on ebay with 44k miles. I had to pay a few hundred to ship it, but still.

[nascarnate326]

6.0 too common? 5.3 was the most mass produced genIII engine I picked mine up for $212 on ebay with 44k miles. I had to pay a few hundred to ship it, but still.

How many 5.3 ls powered cars on the site?

Only one that I know of was Sman and he moved onto a 6.0 I believe.

6.0 is a very common swap into an fbody. 5.3 are making their way into every thing but most people figure for the extra hundred bucks go with the 6.0.

[shawnc16]

Go with an L33 5.3. Better rods.