GM Gen VI V-8 engine will be available in 2027

[UncleDave]

If the LS style engines are called "Small Block" then what is the big block, that is now used in cars and trucks?
They have zero resemblance to the real SBC. Its just nice that Chev performance still offers them and the real BBC as well.

Just a bigger small block.

 

[UncleDave]

I hate LS engines. Can't stand them. Would much rather have an old school SBC.

Curious as to why?

 

[grasscutter]

Curious as to why?

I don't like the sound they make. Same thing with Ford's Coyote engine; sounds terrible.

What would you call a Chevy V8 in a 1986 Z28 Camaro?

 

[Skippy722]

What would you call a Chevy V8 in a 1986 Z28 Camaro?

Gutless.

 

[ArrestMeRedZ]

I don't like the sound they make. Same thing with Ford's Coyote engine; sounds terrible.

What would you call a Chevy V8 in a 1986 Z28 Camaro?

If it's the original V8, I'd call that low compression detuned boat anchor a dog. But it was still a SBC.
The SBC finally improved with the LT1 and the LT4 (very few of them) just before the LS1 was introduced to the Z28 in 1998. Personally, I think the LS1 sounds good. Not as good as the DZ302 in the original Z28, but still good.

 

[daves87rs]

With the rumors I’ve heard coming out of Warren and Milford, I’m going to say don’t wast your money.

If you must stick with GM, 2.7 works just fine…..

 

[UncleDave]

I don't like the sound they make. Same thing with Ford's Coyote engine; sounds terrible.

What would you call a Chevy V8 in a 1986 Z28 Camaro?

Uncorked they sound about the same to me. Through todays maze of stuff they dont sound as impressive.

They are easier to get power out of than an old school small block especially in a marine config running outdrive based engine constraints.

What would I call an engine in an 86 camaro ?- it's probably technically a gen 1 small block, but as everyone has said what hit the street were dogs.
The short block was workable.

With a top end job (heads, cam, intake, carb) you could get an easy 350 out of it pretty cheap, you and a buddy can easily pull it off on a Saturday and be out prowling Sat night against stockers.

 

[Snagglefoot]

A popular swap engine is a Gen 4 6.0 from a truck. 352 HP and 383 Lb ft of torque. No AFM. The LY6 is one example. It comes stock with aluminum heads and hypereutectic aluminum pistons.

 

[4wd]

A popular swap engine is a Gen 4 6.0 from a truck. 352 HP and 383 Lb ft of torque. No AFM. The LY6 is one example. It comes stock with aluminum heads and hypereutectic aluminum pistons.

Basically what a 5.3L makes - a delete might be a similar cost and starting with a new valve train …

 

[OVERKILL]

If the LS style engines are called "Small Block" then what is the big block, that is now used in cars and trucks?
They have zero resemblance to the real SBC. Its just nice that Chev performance still offers them and the real BBC as well.

There are no big block engines manufactured by GM for passenger vehicle use anymore (they may still make the 454 or its derivatives for some industrial or marine applications).

The LS engines were a much needed revisit to the core design of the SBC, which, while ubiquitous with hot rodding and having obscene amounts of aftermarket support, suffered from design decisions made in the 1950's like the old Ford Y-block, such as siamesed intake and exhaust ports and the lack of deep skirting on the block for a stronger bottom-end.

I always hated the rear-mount distributor, it was a nightmare in many applications, much preferring Ford and Chrysler's placement of it on the front.

The LS brought a vastly superior cylinder head design, massively more robust bottom-end, crank-driven oil pump and with these improvements the potential for considerably more power.

As for the name, the LS engines (Gen 3) were the next generation GM small block, they just have a lot more in the way of design changes than the 90's LT engines (Gen 2).

Interesting fact: the LS engines have the same cylinder firing order (not numeric firing order, due to a different bank numbering scheme) as the Ford 351W/302HO.

 

[OVERKILL]

I don't like the sound they make. Same thing with Ford's Coyote engine; sounds terrible.

What would you call a Chevy V8 in a 1986 Z28 Camaro?

I always hated the "blat" that the SBC's made. A stock 305 Camaro with cherry bombs sounded like a goat being strangled, a 302HO sounded so much better. I've heard some great sounding LS mills, but some pretty awful ones too, like Jim Bob and his 4.8L 2WD Silverado with a muffler delete.

 

[grasscutter]

I always hated the "blat" that the SBC's made. A stock 305 Camaro with cherry bombs sounded like a goat being strangled, a 302HO sounded so much better. I've heard some great sounding LS mills, but some pretty awful ones too, like Jim Bob and his 4.8L 2WD Silverado with a muffler delete.

My favorite sounding engine is the 1986 Ford 5.0L high output with factory stock exhaust. I would never use the stereo if I had one.

 

[OVERKILL]

The 5.3 is smaller than the 5.7 hemi, so it's going to have lower output.

Equalizing for displacement, the 5.3L mentioned is 62.3HP/L while the 5.7L HEMI is 69.3HP/L and that's with port injection. Generally, stock-for-stock, the HEMI produces more power than a similar displacement LS engine. The LT1 at 455HP (73.4HP/L) vs the 392 at 485HP (75.8HP/L) is another example, though it's at least closer than the 5.3L/5.7L comparo.

 

[4wd]

I always hated the "blat" that the SBC's made. A stock 305 Camaro with cherry bombs sounded like a goat being strangled, a 302HO sounded so much better. I've heard some great sounding LS mills, but some pretty awful ones too, like Jim Bob and his 4.8L 2WD Silverado with a muffler delete.

Equalizing for displacement, the 5.3L mentioned is 62.3HP/L while the 5.7L HEMI is 69.3HP/L and that's with port injection. Generally, stock-for-stock, the HEMI produces more power than a similar displacement LS engine. The LT1 at 455HP (73.4HP/L) vs the 392 at 485HP (75.8HP/L) is another example, though it's at least closer than the 5.3L/5.7L comparo.

But GM could make the same power any day - it’s that close - don’t want to wake up the howler monkeys - but my buddies 6.2L sounds fantastic in sports mode - and puts out great power numbers …
(No, it’s not in the recall anymore than Wayne’s) …

 

[OVERKILL]

But GM could make the same power any day - it’s that close - don’t want to wake up the howler monkeys - but my buddies 6.2L sounds fantastic in sports mode - and puts out great power numbers …
(No, it’s not in the recall anymore than Wayne’s) …

Yep, it could be driven by emissions as well, a wedge chamber vs a semi-hemispherical one with dual ignition, there may be more wiggle room on the emissions front with the HEMI. I think, IIRC, the HEMI has a bigger stock cam. The LSx engines are quite capable, remember the LS7 and how it responded to a simple cam swap? Was wild.

 

[4wd]

Yep, it could be driven by emissions as well, a wedge chamber vs a semi-hemispherical one with dual ignition, there may be more wiggle room on the emissions front with the HEMI. I think, IIRC, the HEMI has a bigger stock cam. The LSx engines are quite capable, remember the LS7 and how it responded to a simple cam swap? Was wild.

Cams have always been a big bang for the buck - especially if you can do your own … Labor is another story now that the heads must come off for more things than ever …

 

[redhat]

LSx sound great, so do LTx. Most small blocks sound weak unless cammed and or higher comp. SBF sounds great too. Coyote I do not like how they sound. 4v Modular on the other hand they sound awesome.

Rumor mill from leaked RPO codes shows a circle back to the “LS” naming convention for Gen 6, specifically with a new LS6 in the Corvette with a displacement of 6.7 liters. No mistype here. In true performance car fashion I’d imagine it will be all aluminum. Gen 6 will be OHV/pushrod.

Truck engines are expected to be 5.7 and 6.6 liter displacements. Your 5.7 in the low to mid tier trucks and then 6.6 for your HO/premium models (Yukon Denali/Escalade). Again I’d assume all aluminum.

Thoughts behind this I’d speculating is to drop the bad stigma of the Gen 4/5 5.3 lifter issues and of most recent 6.2 lifter and other issues. Then again one would imagine the Gen 6 has been in development for long before announcement of CAFE relaxations so who knows the true history behind the displacement changes. Maybe dripping into the “it’s got a 350 small block” demographic. 6.6 would then be a “400” for the CI folks.

3/4 ton trucks will most likely retain the Gen V iron-block 6.6. Similar motors but different Generations.

This would how I’d figure it’ll pan out if GM does usual GM stuff.

 

[OVERKILL]

LSx sound great, so do LTx. Most small blocks sound weak unless cammed and or higher comp. SBF sounds great too. Coyote I do not like how they sound. 4v Modular on the other hand they sound awesome.

I think the firing order may be a factor. The Modular shared the same firing order as the 351W/302HO, while the Coyote was changed to the old Flathead firing order, for reasons that are not immediately apparent to me. The LSx engines dropped the "blat" of the SBC's, which I assume was due to the firing order change. Even a lopo 4.8L, while it doesn't sound great, doesn't have that sound the old boat anchor SBC's had.

 

[redhat]

I think the firing order may be a factor. The Modular shared the same firing order as the 351W/302HO, while the Coyote was changed to the old Flathead firing order, for reasons that are not immediately apparent to me. The LSx engines dropped the "blat" of the SBC's, which I assume was due to the firing order change. Even a lopo 4.8L, while it doesn't sound great, doesn't have that sound the old boat anchor SBC's had.

I would agree 100%.

 

[Exhaustgases]

I hate LS engines. Can't stand them. Would much rather have an old school SBC.

I agree 100%. There are some areas that are a small bit lacking on the old SBC, but almost everything about the LS is lacking, cylinder heads? Yeah port improvements etc. but what was given up for that? There is a reason for all the problems with the LS, and not just AFM.

The LS style should be called the mouse house motor, for good reason. Yeah maybe an okay deal for a race car but that under the intake space is nice for mice, in gramps grocery store vehicle.