Beag's 67 Chevelle. Supercharged Summer

[shady]

Do the research on the 4" stroke thing. There's a lot of block work needed and some blocks can't even do it iirc. I looked into it because I wanted a 4"x4" square setup in the dually. But the pin gets pretty high in the piston, like into the rings, and starts causing issues.

They do make lsx blocks with a taller deck height for applications with more than normal stroke.

As for doing it right, according to the ls board I did most of my research on, the 6.0 stock internals will take 750 all day everyday.

No idea if that's accurate, but there were guys (claiming) they were running near 1000 drag racing for multiple seasons on stock short blocks with heads, studs, and turbos.
That's iron block though so...?
I'd rather do it like your saying too. But if it could be done an azz load cheaper and still be completely safe and fine lol.

 

[beags86]

Do the research on the 4" stroke thing. There's a lot of block work needed and some blocks can't even do it iirc. I looked into it because I wanted a 4"x4" square setup in the dually. But the pin gets pretty high in the piston, like into the rings, and starts causing issues.

They do make lsx blocks with a taller deck height for applications with more than normal stroke.

As for doing it right, according to the ls board I did most of my research on, the 6.0 stock internals will take 750 all day everyday.

No idea if that's accurate, but there were guys (claiming) they were running near 1000 drag racing for multiple seasons on stock short blocks with heads, studs, and turbos.
That's iron block though so...?
I'd rather do it like your saying too. But if it could be done an azz load cheaper and still be completely safe and fine lol.

Lol if I can't have 400 cubes then I'm out!
Lol.
Like I said, just doing some bench racing now. I suppose I could be talked into a stockish bottom end. I know that the Trailblazer SS guys are putting 700 plus through their LS2 with little to no effort. But I would have to rebuild it. So If I'm in the engine, forged pistons, proper ring gaps, head studs, are all pretty cheap.
(Cam happens regardless)
So I guess the thing to know would be what aluminum LS will net me 400-plus cubic inches? Is that the lS2? Or maybe the answer is the LS3 I don't know.

 

[beags86]

https://www.cnc-motorsports.com/ls-...kit-10-8-1-mahle-pistons-24t-eagle-12910.html

Seems that this is the common 408 you see all time. Pretty easy it seems.
Shows how much I know I guess.

 

[LLeff]

my suggestion is ls of your desired choice and an lsa blower, as a reminder gen 3 and 4 ls motors are cathedral port heads where the gen 5s are rectangle now the lsa is a direct bolt on to the gen 5, adapters are made for the gen 3 and 4. could also slap gen 5 heads on a gen 3 or 4 block and do away with adapters. one of the best ways to make reliable power in the range your looking in my opinion

 

[folkenheath]

The LS3 and L76 and LSA (Gen IV) are all rectangular port too(not cathedral), just not a more squarish port and direct injection like the GenV engines.

The new high helix rotor designs of the Eaton TVS are very close to a screw compressor in performance and efficiency, not sure its worth the difference to be honest. You can buy those through both Edelbrock and Magnuson for many engines, and you can get the larger displacement model for higher HP capability than most of the stock units, it all comes down to they can flow more air.

 

[beags86]

my suggestion is ls of your desired choice and an lsa blower, as a reminder gen 3 and 4 ls motors are cathedral port heads where the gen 5s are rectangle now the lsa is a direct bolt on to the gen 5, adapters are made for the gen 3 and 4. could also slap gen 5 heads on a gen 3 or 4 block and do away with adapters. one of the best ways to make reliable power in the range your looking in my opinion

Lol. I pretty much have no idea what the hell you just said. I only I vaguely know the differences between the different generations.....

I wouldn't be opposed to one of those big LSA superchargers.

Guessing an LSA is way out of my budget.
And I just looked. Looks like used pull out LSA are about 13k
Pretty sure I build a Stout LS for less then that.

 

[beags86]

The LS3 and L76 and LSA are all rectangular port too(not cathedral), just not a more squarish port and direct injection like the GenV engines.

The new high helix rotor designs of the Eaton TVS are very close to a screw compressor in performance, not sure its worth the difference to be honest. You can buy those through both Edelbrock and Magnuson for many engines, and you can get the larger displacement model for higher HP capability.

So in other words look for a L76 to use the LSA blower?

 

[beags86]

Oh yeah, a high Helix would be fine. I'm not dead set on a twin.
Just something of that general idea.
Just want to set the stage so to speak so somebody didn't suggest I put a 177 mini blower on my small block
Lol.

 

[tRustyK5]

Texas speed builds a 427 cid LS that runs out to 650+ hp NA. The use the aluminum 5.3 block and sleeve it with some unobatnium sleeves.

That's the problem. They are victims of their own success. They need to open it up or do it a few times a year.

There is always Rocky Mountain race week. Similar event, maybe a bit easier to get into...

 

[beags86]

Texas speed builds a 427 cid LS that runs out to 650+ hp NA. The use the aluminum 5.3 block and sleeve it with some unobatnium sleeves.

16k.... I know I would probably have 10+ into my own concoction of an LS. LSA blower would keep it cheaper.
Just seems like alot of bread to shell out for a engine at once. Vs you can spread it out building your own.

 

[folkenheath]

Oh yeah, a high Helix would be fine. I'm not dead set of a twin.
Just something of that general idea.
Just want to set the stage so to speak so somebody didn't suggest I put a 177 mini blower on my small block
Lol.

My Pro app will estimate HP potential based on the different types of superchargers, just leave the engine VE the same and see what happens with and without an intercooler. You can even customize the efficiencies and temperatures if you want a better estimate.

 

[beags86]

My Pro app will estimate HP potential based on the different types of superchargers, just leave the engine VE the same and see what happens with and without an intercooler. You can even customize the efficiencies and temperatures if you want a better estimate.

I wouldn't expect any less then you going straight to the meat and potatoes of the horsepower equation,
but I was hoping you would pop in here and tell me what engine or block you thought would be the best to start with.

Maybe aftermarket, I don't know.
But if I went with a stock gm block, I would have an idea to know what to tentatively look for.

 

[LLeff]

The LS3 and L76 and LSA (Gen IV) are all rectangular port too(not cathedral), just not a more squarish port and direct injection like the GenV engines.

Thanks for correcting me, for some reason i had a brain fart thinking gen 3 was ls1/6 and gen 4 was ls2/7.

Also i apologize for not checking things before posting misleading information

 

[folkenheath]

Well, it depends, you using stock heads or going aftermarket?

If you are using stock heads start with an LS3 or L76 Gen IV, has rectangular port heads from the factory. Put a stroker rotating asssmebly in it and make a 417 or something like that. Then plop your boost apparatus on it...

Or if you are going aftermarket heads anyway start with an LS2 and then stroke it to a 408 and bolt some rectangular port heads on it and then plop your boost apparatus on it.

It also depends on if you want VVT or not what you start with.

If you want DI then go GenV, to a L86 or LT1 etc. But those are probably a lot more cost for not a lot of gain at this point in time.

 

[beags86]

Right now it seems like a crashed g8 might be the best idea. L76 engine and tr6060

 

[folkenheath]

Thanks for correcting me, for some reason i had a brain fart thinking gen 3 was ls1/6 and gen 4 was ls2/7.

Also i apologize for not checking things before posting misleading information

Thanks for the follow up, I generally try not to call people out directly, so I didn't directly quote you, I'm not about any blame, just about the correct info.

 

[beags86]

Well, it depends, you using stock heads or going aftermarket?

If you are using stock heads start with an LS3 or L76 Gen IV, has rectangular port heads from the factory. Put a stroker rotating asssmebly in it and make a 417 or something like that. Then plop your boost apparatus on it...

Or if you are going aftermarket heads anyway start with an LS2 and then stroke it to a 408 and bolt some rectangular port heads on it and then plop your boost apparatus on it.

It also depends on if you want VVT or not what you start with.

If you want DI then go GenV, to a L86 or LT1 etc. But those are probably a lot more cost for not a lot of gain at this point in time.

Boost apparatus. Lol! I love it.
direct injection and variable valve timing are things I don't think that I really care that much about for this car.
I think direct injection is way cool. I think I would keep it somewhat simple.
(That relative because there's nothing simpler than a carb'ed small block that's in it now)

 

[Truckman4life]

My wife's Yukon XL Denali has the all aluminum 6.2L and all wheel drive in a heavy pig of a vehicle but it's fun to drive. It's supposed to be 380 HP and 417 lb ft. Go the route some of the diesel guys did and do a decent sized turbo with a supercharger for the low end boost. No lag.

 

[beags86]

Took a look at some internet prices
As I suspected. lS2s and L76s pricing is all over the place.
Out of curiosity I looked at some LS6 stuff LS1 stuff. In some cases junkyards have the LS1's priced higher then a L76.

Looked at bare blocks. Same deal. Prices all over the board.

I'm not opposed to spending 15k on an engine. But like most people I just want to get a good deal and value for my money.


Guess I'll have to mull it over.
Slightly regretting turning down that $1,500 LS2 complete running engine a month ago. The guy even said, what about your chevelle? And instantly responded no I don't think so... Lol

 

[beags86]

Another thought is that I ALWAYS want to build the biggest engine possible, but I've never set out to build an engine with a goal of that engine being under pressure.
Thinking about that I maybe could think about using a smaller bore block. Like the LS1 or LS6. Stroking that would net me somewhere around 388 or so.
I guess I could live with that.
Just thinking out loud.

I guess my thought would be aluminum GM block, stroker crank, new aftermarket heads and a LSA blower.

I see no reason why that combo with a proper cam and set up block couldn't push out 700 horse... If I'm wrong about that someone tell me....