GM Confirms 420 HP 3.6L LF3 Twin Turbocharged V6 for 2014 CTS

[Abstrak]

I wonder how much this would run as a crate engine for LLT guys that want to do a swap.

[KMPrenger]

Originally Posted by truth411

But i bet $100 the LT1 would produce more torque everywhere in the powerband. While at the same time being more powerful, equal or more fuel efficient and more profitable. This ne ttv6 sounds exspensive. I still say an LT1 makes more sense for an ATSV. Imvho.

Raise the power in the LF3 to match the HP level of the LT1, and I guarantee you that the LF3 will make more torque over just as wide of an RPM range.

That said...that LT1 is freaking awesome.

As Gretchen said earlier...420HP 430 TQ is not pushing it in the LF3. Hell, it can go well past that easily. We see it all the time with forced induction on the LFX which is a fairly tough engine, but has a couple weak points you have to watch out for once you start climbing near the 500 bhp range. The LF3 is stronger so I'm sure it could handle 500 without much issue.

More in depth info about it here:
http://wot.motortrend.com/cadillacs-...th-343443.html

[Mr. Wyndham]

Originally Posted by truth411

But i bet $100 the LT1 would produce more torque everywhere in the powerband. While at the same time being more powerful, equal or more fuel efficient and more profitable. This ne ttv6 sounds exspensive. I still say an LT1 makes more sense for an ATSV. Imvho.

Typically...I'd agree.

But we don't know very much about either engine, just yet....and if BMW is moving to a turbo 6 for their M3 (and they are)...I believe it makes sense for Cadillac to beat them at their own game.

[FenwickHockey65]

Also, not saying this engine will be Cadillac exclusive forever, but GM may have wanted to develop an engine solely for Cadillacs. There are those out there who would rather their luxury sedan not be powered by a Chevrolet engine, as asinine as that sounds.

As of now there aren't plans (as far as I know) to use it anything but Cadillacs, so...

[Bhobbs]

Can you even consider the new LT series a Chevy engine? It's more like a GM engine.

[Angrybird 12]

Originally Posted by Bhobbs

Can you even consider the new LT series a Chevy engine? It's more like a GM engine.

They are all corporate engines now, it's been that way for a long time, it started in the 70's when they started putting Chevy engines into Oldsmobiles.

[King Sun]

Originally Posted by KKreme15

This new motor has me like

you post on sohh don't you

[rayhawk]

Originally Posted by KMPrenger

Raise the power in the LF3 to match the HP level of the LT1, and I guarantee you that the LF3 will make more torque over just as wide of an RPM range.

That said...that LT1 is freaking awesome.

As Gretchen said earlier...420HP 430 TQ is not pushing it in the LF3. Hell, it can go well past that easily. We see it all the time with forced induction on the LFX which is a fairly tough engine, but has a couple weak points you have to watch out for once you start climbing near the 500 bhp range. The LF3 is stronger so I'm sure it could handle 500 without much issue.

More in depth info about it here:
http://wot.motortrend.com/cadillacs-...th-343443.html

An engines ability to handle a certain amount of power vs. what the OEM will ship it with are not the same. The OEM works with a factor of safety to minimize warranty costs. The fact is, all else being equal, power is related to the pressure developed in the combustion chamber. The more displacement, the less pressure is required to produce a certain amount of power. Higher pressure leads to higher loads throughout the engine and particularly on the rings. For a 3.6L engine to produce the same amount of power (at the same rpm) as a 6.2L engine, the average cylinder pressure needs to be doubled. I want the engine that is only working half as hard.

[scrming]

Originally Posted by KMPrenger

Raise the power in the LF3 to match the HP level of the LT1, and I guarantee you that the LF3 will make more torque over just as wide of an RPM range.

That said...that LT1 is freaking awesome.

As Gretchen said earlier...420HP 430 TQ is not pushing it in the LF3. Hell, it can go well past that easily. We see it all the time with forced induction on the LFX which is a fairly tough engine, but has a couple weak points you have to watch out for once you start climbing near the 500 bhp range. The LF3 is stronger so I'm sure it could handle 500 without much issue.

More in depth info about it here:
http://wot.motortrend.com/cadillacs-...th-343443.html

with that being said.... i have my 3.5 V6 EcoBoost cranked up to about 500 HP / 500 TQ and there is still a lot of room left in the motor as some of the SHO guys are pushing their a lot more than me! Talked to a guy who worked on the prototype EcoBoost Flex.. mentioned they had it cranked up to about 700 HP but started spitting out pieces of the tranny shortly after that...

[Firefighter]

Originally Posted by Angrybird 12

They are all corporate engines now, it's been that way for a long time, it started in the 70's when they started putting Chevy engines into Oldsmobiles.

You are correct sir...

[GretchenGotGrowl]

Originally Posted by truth411

But i bet $100 the LT1 would produce more torque everywhere in the powerband. While at the same time being more powerful, equal or more fuel efficient and more profitable. This ne ttv6 sounds exspensive. I still say an LT1 makes more sense for an ATSV. Imvho.

We really won't know what either of them will look like until the information is released. We also don't know how much either will cost or how fuel effecient the LT1 will be in either the Caddy or a possible Camaro. Fuel effeciency measures take a lot more into account that simple the engine (wgt,. gearing, tune). I think if the LT1 would be more powerful AND equal/more effient AND more profitable in the Caddy, then GM would put it in the Caddy. My guess is that for this platform the LF3 made more sense.

Just to give you and idea of the difference in cost between a TTV6 and large V8, go price an F150 with the different engines. It is actually cheaper to get one with the Ecoboost than the 6.2L V8 and you get similar power (be sure to take in account the cost of options that are required). Ford claims a $750 cost difference (for the customer) over the 5.0L engine. Given that the resale value of the Ecoboosts are about $1,600 more than the 5.0, that seems to be a good choice for Ford and the consumer. I'm thing have the choice of a LT1 and LF3 is going to be a good option for GM and it's buyers as well.

[GretchenGotGrowl]

Originally Posted by rayhawk

An engines ability to handle a certain amount of power vs. what the OEM will ship it with are not the same. The OEM works with a factor of safety to minimize warranty costs. The fact is, all else being equal, power is related to the pressure developed in the combustion chamber. The more displacement, the less pressure is required to produce a certain amount of power. Higher pressure leads to higher loads throughout the engine and particularly on the rings. For a 3.6L engine to produce the same amount of power (at the same rpm) as a 6.2L engine, the average cylinder pressure needs to be doubled. I want the engine that is only working half as hard.

Not sure where you are getting those numbers, can you provide some more info like a citation?

[5thGenOwner]

Originally Posted by shaffe

That is incredible. Cadillac is getting extremely impressive in the last few years.

Keep it up GM!

[TheCaptain]

I'm not only excited to see the new CTS, but this engine should be a blast, plus sticking this in the XTS, and possibly ATS...!