School Me on LS Motors

[L31MaxExpress]

Bad batch of valve springs. It happens sometimes. I remember it happening a lot on the LT1 in the C7.

He'd be running aftermarket springs anyways.

The LS7s would drop valves often from failed valves.

 

[0xDEADBEEF]

The LS7s would drop valves often from failed valves.

Valve guides. Well known issue.

 

[df2x4]

Holdener video regarding stock LS heads:

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[OutlawDrifter]

Good call on the rec port heads, they're a fair amount better than the cathedral ports.

Depends on the application, for max effort HP...yes. My 6.0l Z28 makes well over 500hp at the crank with 317 cathedrals and a smallish cam 230/232 (.595/.585 lift).

Lots of reading at ls1tech.com...days worth. If it has been tried, it's probably on there.

Are you going carb'd or aftermarket ECU?

If you're set on 6.0l find a good LQ4 block and then you can add better heads/internals from there. I have a stock LQ4 in my '49 and a cammed LQ9(6.0l with factory flat tops basically) in my Z28. Gen IV rods are supposedly better.

What is the HP goal and application?

 

[0xDEADBEEF]

Depends on the application, for max effort HP...yes. My 6.0l Z28 makes well over 500hp at the crank with 317 cathedrals and a smallish cam 230/232 (.595/.585 lift).

Yes, I think the cathedrals were a little better on low end power. They kind of made different tradeoffs.

My 5.3 makes well over 500 hp at the crank with stock 862s, 218/227 cam, and some boost.

 

[Spareparts]

Man I have had 2, 6.2s both stock and both crappd out. I'll never have another!

 

[OutlawDrifter]

My 5.3 makes well over 500 hp at the crank with stock 862s, 218/227 cam, and some boost.

"some boost"

Bringing an F15 to a gun fight haha

 

[0xDEADBEEF]

"some boost"

Bringing an F15 to a gun fight haha

Honestly, I haven't had the cajones to build more than about 4 lbs of boost, but it should be around that level.

 

[0xDEADBEEF]

BTW, you can throw on the smaller 4.8/5.3 heads on the 6.0 and they make more power than the 317 because of compression increase. At least I seem to recall that on one of Holdener's vids.

 

[letitsnow]

Man I have had 2, 6.2s both stock and both crappd out. I'll never have another!

We can read and watch all that we want, but nothing beats ^^^ first hand experience!