future small block Chevy lineup

[63GrandSport001]

Does anyone have any info on bits and pieces we have been hearing on future LS engines.

Ive heard of a LS3 V-8 being 6.2L and packing 425-450BHP

Ive heard LS8 packing 480-500BHP

Ive heard of the LS9 supercharged V-8

and Ive heard that the LS7 was to get direct injection heads.

Can anyone prove any of this info to be false or give updated or more info on this?

[Achelous]

LS8? What would that be?

[gm_scott]

I've heard the same HP numbers for the LS3

[purplehaze]

Originally Posted by Autoweek forums

(1) The LS8 is probably the 6.0L DOHC engine discussed in an earlier thread, right? Is it slated for the Corvette, and if so, how will it fit under the hood?

(2) The LS9 is (a) the OHV LS7 with direct injection plus (maybe) 3V heads, or (b) the supercharged version of the 6.0L DOHC motor, or (c) the supercharged version of (a)?

(3) What about solenoid valves (instead of pushrods or OHC)? Does GM have an engine with that technology coming out soon?

Seen this on autoweek forums.

[01cavalier]

I haven't herd much about direct injection on the V8's, though plenty of times, even from GM I have heard of 3 valves per cylinder on the V8 engines, along with a separate camshaft just to control the exhaust valve, and the adding variable valve timing. That alone would add up to one mean V8. Gm did have charts out before showing a 10-15% power increase just going to the 3 valve heads, and then adding 2-stage intake valve lift for better low end torque and higher horsepower.

[forsbach427]

Why not do a DOHC 4 valve per cylinder 427SB with Direct Injection that is Super Charged why cant they do that, personally if it is true i dont like the fact of a dohc 6L beating out my beloved 427.

[purplehaze]

Originally Posted by forsbach427

Why not do a DOHC 4 valve per cylinder 427SB with Direct Injection that is Super Charged why cant they do that, personally if it is true i dont like the fact of a dohc 6L beating out my beloved 427.

GM are you reading this?

[327]

direct injection Yes, DOHC NO WAY! Look at what the LS7 does just the way it is.

[63GrandSport001]

Originally Posted by 327

ls8 has to be a big block. the ls7 is about as big as they can go with a SB
is this Ls3 the engine in the new cadillac??

You can get about 454 cubes out of the small block so there is still some size on it. And just because the LS8 is one number above LS7 doesnt mean that the engine is getting any bigger.

From what I know the LS8 is a low cost supercharged engine while the LS9 is a high cost supercharged engine. The only thing that can probably be confirmed is the 6.2L size for the LS3 and VVT. Other then that the rest is just rumor, but it would be awesome for the next gen CTS V to come in 2 door, 4 door, and convertible form with 450BHP and better aimed at the BMW M3 which is to get a 400+BHP V-8.

Im guessing that the LS8 is directly related to the LS3 being 6.2L in size but has a low cost supercharger system. I can also see the LS8 going into Chevy SS vehicles including the next gen SS Silverado. I see the LS7 and LS9 being related in they both use the same block. however the LS9 might be smaller in dissplacement but I dont see them using a 3 valve head or a two cam in block (from what Ive heard those ideas are dead) and we only have one document that shows the LS9 being DOHC and that could be mere coding or just a test head. My ideal line upLS4 gets killed when the Impala/Grand Prix gets moved to the Zeta platform and the Vortec 5300 is based on a Gen IV block.

LS2 6.0L 400BHP - GTO, Camaro, Impala SS, Pontiac G8 GTP, and other performanc RWD cars
LS3 6.2L VVT 450BHP - Cadillac CTS V, C6 corvette
LS7 7.0L VVT direct injection 550BHP - C6 Z06, CTS V plus
LS8 6.2L VVT supercharged 500BHP - Camaro SS, GTO Judge
LS9 6.2L??? 7.0L??? VVT direcet injection supercharged 650BHP - Corvette SS

The point of this line up is it gives GM designings and plannings more choices as far as price/performance goes. I can see the LS2 and LS8 being the cheaper engines while the LS3, LS7, and LS9 are the more expensive engines and to be used in higher costs products like the CTS V, and Corvette.

[superstreet]

Originally Posted by 327

ls8 has to be a big block. the ls7 is about as big as they can go with a SB
is this Ls3 the engine in the new cadillac??

how do you know?

[aldw]

Would definitely like to hear updates on the DOHC engines, especially considering recent developments...

[asrapid]

well..it seems there isn't any DOHC V8 in near future.
Also it seems that next gen. LS with DI vvt etc. will replace northstar egine.
But we didn't hear anything about 6.2 l Dohc V8 from UAW contract so who knows what will happen.

[wpageabc]

Its all going smaller to comply with the new laws. Small block going to small size and big block going bye bye except aftermarket

[member12]

Originally Posted by 01cavalier

I haven't herd much about direct injection on the V8's, though plenty of times, even from GM I have heard of 3 valves per cylinder on the V8 engines, along with a separate camshaft just to control the exhaust valve, and the adding variable valve timing. That alone would add up to one mean V8. Gm did have charts out before showing a 10-15% power increase just going to the 3 valve heads, and then adding 2-stage intake valve lift for better low end torque and higher horsepower.

I just never understood how they can do that. I've seen the inside of a 2v/cylinder small block, and I just couldn't see how they can do a 3V engine with the camshaft mounted inside the V.

It just seems like it would be easier just to put the camshaft over the clinder heads and make a 4v/cylinder DOHC motor.

[Olds88]

Originally Posted by forsbach427

Why not do a DOHC 4 valve per cylinder 427SB with Direct Injection that is Super Charged why cant they do that, personally if it is true i dont like the fact of a dohc 6L beating out my beloved 427.

DOHC doesn't offer the current pushrod LSx engines packaging or reliability. It'll make the motors pricier and more complex.