bump bump.

 

Is this a LS3? If so and in good condition I'd buy it.

 

if it comes with computer and harness it is worth it in all reality those 6.2s can make good power, more then the 5.3 for sure. I am not completely up to speed on the ls engines though so price wise it seems in line with others I have seen is what I am getting at.

 

The 6.2s have much thinner cyl liners compared to an aluminum 5.3. Thats the biggest issue. The crank, rods and pistons are all equal strength on the gen 4 engines.

The 6.2 square port heads are great. Intake valves are a lil heavy but thats easy to fix.

You will likely crack a cyl with the 6.2 eventualy if you plan to hit it hard and often.

It doesnt happen much, but ive seen a few completely stock ls3 and lsa engines with cracked cyls.

 

The 6.2s have much thinner cyl liners compared to an aluminum 5.3. Thats the biggest issue. The crank, rods and pistons are all equal strength on the gen 4 engines.

The 6.2 square port heads are great. Intake valves are a lil heavy but thats easy to fix.

You will likely crack a cyl with the 6.2 eventualy if you plan to hit it hard and often.

It doesnt happen much, but ive seen a few completely stock ls3 and lsa engines with cracked cyls.

Never heard of an LSA cracking a cylinder.

 

I noticed you didn't list mileage....

One of the most important factors to determine value.

No I wouldn't buy a high mileage 6.2L for $3K.
The costs to rebuild it exceed it's value

 

Keep what you have

 

5.3 iron block is a strong foundation for a build.

 

L92?

 

L92 heads on a gen 4 iron 6.0 if I was doing 200-300hp of nitrous. Add forged pistons and go 400-500 worth....

 

Desired RPM? The smaller 5.3 will likely go much higher on the tach before she spills her guts. The 6.2 will be way ahead on hp and tq in NA form. Maybe a 150 shot would get you where you want with a 6.2 instead of a 250-300 shot on the 5.3.

 

5.3 and 6.2 have same stroke - how's that 5.3 going to make it much higher? Bottom end of LS engines can all handle just about anything, no advantage for slightly lighter pistons.

 

With any GM aluminum LS casting, it's all in the tune. You can get 1000hp out of an LS7 block as long as you don't detonate it. Err on the careful side and you'll be fine.

 

That's pretty much it. You can make a shit ton of power as long as you don't ping it.

OP did not specify if he's building it for a 2-300 shot. 200 is OK on stock pistons if you're careful. A 300 hit it won't take much of before you crack a piston. Biggest problem is the top ring gap.

If you're using forged pistons with the proper top ring gap the pistons can actually outlast the block under detonation.

Just make sure you vent the backsides of the cyl. head steam ports.

 

Meaning you must rev the 5.3 higher to get the torque numbers - NOT that it revs easier. It doesn't. And the guts won't stay put any better.

 

And why are you looking here exactly

 

Have you tried looking in the Marketplace ads?