So GM is trademarking LT-5 engine moniker

[XfireZ51]

Recently discovered General Motors trademark applications for LT4, LT5, LT88 and LTX have observers wondering what kind of high-performance offerings could be on their way. A new LT4 would mark a return of the engine designation first used on the Corvette Grand Sport, SLP Pontiac Firehawk and SLP Chevrolet Camaro SS from 1996 and 1997. Supposition at Corvette Forum – which provided advance intel on the C7 like these leaked images – believes a new LT4 could go into the high-performance trim of the next-gen, 2015 Camaro that would be more powerful than the 580-horsepower Camaro ZL1.

Seeing an LT5 again would also be déjÃ* vu – in its former life it was a 5.7-liter V8 for the C4 Corvette ZR-1 from 1990-1994 designed by Lotus, producing from 370 hp to 405 hp. A mix of rumor and hope is that the new LT5 will be a supercharged evolution of the 6.2-liter LT1 (pictured) placed in the new C7 Corvette, and that it will go into the C7 version of the ZR1 pumping out something like 700 hp.

The LTX trademark is, as with that last letter, a complete mystery. If the "X" isn't a generic way to denote the whole LT family, it's wondered if it LTX could refer to a crate motor offering like the LSX.

[Meanmyz]

My own thoughts lean toward just leaving LT5 alone. Leave it alone in reference to "our" LT5 powerplant.

I know GM doesn't think in that light though.

[efnfast]

I can't figure out why they would reuse an old moniker at all. Doesn't the "LT-5" indicate what the motor is. Why have two totally different engines with the same name??

[USAFPILOT]

It is annoying that they are bringing back the old codes for completely different engines. I would guess the new LT5 will not have DOHC's, but it should. GM is dropping the ball here. The only thing worse is SLP badging a camaro as an SS454 that is only 371ci.

[XfireZ51]

I can only hope the LT-5 is an indication of something more than in block cams. Maybe they just think ZR1s should have motors designated as
LT-5s.

[Meanmyz]

Originally Posted by XfireZ51

I can only hope the LT-5 is an indication of something more than in block cams. Maybe they just think ZR1s should have motors designated as
LT-5s.

No, my thoughts are that they are doing it, more along the lines because "it has always been done that way", meaning LS series, or LT series, and in marketing their products, if LT5 adds a little appeal for more sales, than they will do it. In the end, if they introduce a C7 ZR1, it's motor may not even be called LT5....what if that is the Z06 engine, and they call the ZR1's motor L88? Could happen.

Maybe I am getting old, but I thought it raised eyebrows with them calling the new base engine LT1. In my eyes we just had LT1! 1992 - 1996 doesn't seem that long ago!

[efnfast]

The way I see it, they're just muddying the designations. LT-1 doesn't mean anything anymore because you don't know which engine is being reffered too.

[XfireZ51]

Originally Posted by efnfast

The way I see it, they're just muddying the designations. LT-1 doesn't mean anything anymore because you don't know which engine is being reffered too.

Steve,

I know what you mean. Just wishful thinking on my part. As an example,
the Z/28 should have had a 302 just like the Laguna Seca Mustang did.
A ZL-1 in a Z/28? Really?

[efnfast]

Used to be when I mentioned an LT-1, or LT-5 you knew which engine I was talking about. Not anymore.

[Mystic ZR-1]

GM... Don't screw with the LT-5!!!
I don't care how much HP a new LT-5 may
make, it ain't an LT-5!!!!