Chevy running outta steam?

[JasonC]

isn't the MPG from the LSx series due to tall gearing, light weight, and aerodynamic shape of the performance cars they're stuffed into? i'm pretty sure they mentioned that a variation of this motor will also go in their pickup trucks too.

the pushrod motor is a tested and proven design which GM has engineered to perfection but the technology appears tired and lazy imo. i guess to me it just seems that the big 3 german brands are spoiling us with lots of interesting, complex FI motors. (tri turbos anyone?)

Those are helpers to the MPG. but the f-bodys that they was in, isn't a very light car by any means. Most of them have 3.42 gears in them too. I haven't read much yet to what they are going to do with this engine. But i'm sure they will do variations of it for trucks and Camaros like they have in the past.

If they seem lazy or not. Thats up to the buying public to deside on if they want to keep buying their products. As for the Germans with their stuff, i'm not really wanting more stuff stuffed under the hood like 3 hair dryers lol.

[Exodus_2pt0]

I don't understand the pushrod haters out here.


Chevy is simply doing what no one else can do. Go ahead everybody, change your camshaft design drastically, while we polish the original. Then one day, we'll unleash this.


When you can do this with pushrods, why change?

As for the LT1, awesome. As long as I don't see "opti-spark" on the spec sheet, I'm a happy camper.

[AndrewBird]

People are complaining about pushrod engines like they aren't capable of doing anything good. You don't need a bunch of fancy gizmos to make a bunch of power along with decent millage. Old does not mean bad.

[trackjunkie21]

Lame. Ford pulls out 650HP flrom a 5.8...

a 5.8 that's supercharged with 12psi of boost. Bunch of Sandy vaginas in here. go ahead and try to squeeze another 50-100hp out of the m3's v8 and it'll cost you more than a GM ls7 crate engine. The SBC is the greatest engine ever produced and that is a proven fact, it has been stuffed in just about everything from rock crawlers to boats to dragsters. Sure it's an old design, but it works flawlessly.

[Exodus_2pt0]

a 5.8 that's supercharged with 12psi of boost. Bunch of Sandy vaginas in here. go ahead and try to squeeze another 50-100hp out of the m3's v8 and it'll cost you more than a GM ls7 crate engine. The SBC is the greatest engine ever produced and that is a proven fact, it has been stuffed in just about everything from rock crawlers to boats to dragsters. Sure it's an old design, but it works flawlessly.

I agree with everything said here, and would like to add in that every internal combustion engine today is based off of a very old design.

[mrsleeve]

It's only around a 378 cubic inch. And seeing that they have made a 400ci small block in the past, the 378 is not that big if you think about it.

As for the LT1, Yes it came out in 1970 (LT-1). It was a bad little mother fucker! It lasted till 1972 when the muscle car market basicly died. It came back out in 1992 (LT1), it was a reverse flow cooling sytem engine, it had one of the best flowing intakes GM ever put on a small block but it had the opti spark ignition system. It lasted till 1997. Ive had a couple of the LT1s. Not bad little engines, even with the opti spark. My current is a LT1 383 stroker. But it looks like they brought back an old name. Why? i don't know. I think i would of left it dead. But people like the retro thing now days. And IMHO, i think they need to drop the liter crap and start to call them by their cubic inchs.

As for the typical pushrod hating, GM knows their push rod engines. So why fix something that isn't broke?

Jason you are aware that with custom cranks and a punched out 400 there have been 468 SBC Not to mention the current LS7 is a 427 small block.

[rwh11385]

I'd take a new C6 Grand Sport in the carbon package any day so long as it's a fixed roof coupe.

That's the one to get, the hardtop manual grand sports are the ones with hand-assembled dry-sump engines built in Wixom with the LS7s and LS9s.



Here's a video of an amateur having a Build Engine on his LS9 (which you can now do with crate motors not just ones for your Corvette):



Speaking of dry sump... I was going to post the tilt stand video but Jason beat me to it.

Here they are testing it out on the stand.

Looks like someone brought a camera in at Pontiac Powertrain Labs. Such a nice facility.

And awesome:

The company analyzed literally hundreds of systems to get to this final product, including crunching over 6 million hours of CPU time dedicated to combustion system optimization, and nearly 10 million hours when combustion, structure, cooling systems, lubrication and vent systems are factored in. In fact, the motor and its systems are so advanced that an academic SAE paper is being written to explain the whole shebang.

a 5.8 that's supercharged with 12psi of boost.

Exactly. Imagine this engine + boost for the ZR1... or larger displacement for the Z06.

[tjts1]

the pushrod motor is a tested and proven design which GM has engineered to perfection but the technology appears tired and lazy imo. i guess to me it just seems that the big 3 german brands are spoiling us with lots of interesting, complex FI motors. (tri turbos anyone?)

Show me a smaller, lighter package that puts out more power and torque. Go ahead find one. Theres a few very good reasons why people are swapping LSx motors into BMWs and not the other way around.

Displacement doesn't tell you shit.

[Tree18is]

All of you are defintly fuckn retarded.please ban me, also I will keep my car so none of you can have it.
There was a couple good reasonable responses like " why call it an LT1" and some terrible ones like " my dodge ram has 415 horsepower" and another " I like V8's but the horsepower from Chevys V8's is lacking".
Later to all the reasonable people here, I hope you Internet bimmer cocksukers get nut cancer.

[Xat1cZ]

All of you are defintly fuckn retarded.please ban me, also I will keep my car so none of you can have it.
There was a couple good reasonable responses like " why call it an LT1" and some terrible ones like " my dodge ram has 415 horsepower" and another " I like V8's but the horsepower from Chevys V8's is lacking".
Later to all the reasonable people here, I hope you Internet bimmer cocksukers get nut cancer.

[slammin.e28]

All of you are defintly fuckn retarded.please ban me, also I will keep my car so none of you can have it.
There was a couple good reasonable responses like " why call it an LT1" and some terrible ones like " my dodge ram has 415 horsepower" and another " I like V8's but the horsepower from Chevys V8's is lacking".
Later to all the reasonable people here, I hope you Internet bimmer cocksukers get nut cancer.

Someone got a pushrod stuck in their starfish.

[tjts1]

All of you are defintly fuckn retarded.please ban me, also I will keep my car so none of you can have it.
There was a couple good reasonable responses like " why call it an LT1" and some terrible ones like " my dodge ram has 415 horsepower" and another " I like V8's but the horsepower from Chevys V8's is lacking".
Later to all the reasonable people here, I hope you Internet bimmer cocksukers get nut cancer.

[ForcedFirebird]

Show me a smaller, lighter package that puts out more power and torque. Go ahead find one. Theres a few very good reasons why people are swapping LSx motors into BMWs and not the other way around.

Displacement doesn't tell you shit.

This is why pushrods can be a good thing. The 3.5l 60 degree v6 engines we build are easily capable of well over 500whp/tq boosted and 340whp N/A, have pushrods and the entire package is 24"w 24"d x28"h and weighs 340lbs in stock form - with the stock cast iron exhaust manifolds attached, even.

Pushrod motors also have a lower center of gravity and a much simpler design to work on. You guys think the 2v design is dead, but once GM tried the splayed valves and fast burn chambers on the v6 and put it in the v8, results were amazing. You don't NEED 4 valves when you reach the coefficient threshold of a single valve. Due to the splayed design (aka canted valves), the entire valve seat is being utilized, but when you have parallel valves, only half of the valve seat is being used. Not only that, but the 4 valve designs can't have as much lift as a 2 valve can. This all translates to less rotating mass, less valve train weight and nearly the same flow with a lot less effort/complication.

[iansane]

Show me a smaller, lighter package that puts out more power and torque. Go ahead find one. Theres a few very good reasons why people are swapping LSx motors into BMWs and not the other way around.

Displacement doesn't tell you shit.

Just an FYI, the one on the right is a gen1 SBC. Which is a horribly reliable motor, but does not make a lot of power without a good chunk of change. The gen3/4/5 motors have incredibly similar footprints but share no parts whatsoever. Literally nothing interchanges. The bellhousing bolt pattern is only thing that is the same and even that uses different thread bolts. SAE vs Metric. The awesomeness that is the SBC really didn't start shining until '97. Before that it was mainly, 'lets just throw more fuel at it until it's awesome!' Which works, but is probably where most of this "old technology" mantra comes from.

Haha. Hell, I didn't even look close enough. That's a FORD small block on the right.

[SGT4677]

Show me a smaller, lighter package that puts out more power and torque. Go ahead find one. Theres a few very good reasons why people are swapping LSx motors into BMWs and not the other way around.

Displacement doesn't tell you shit.

Those look like fords.An aluminum 4.6 Cobra and a 302? I've owned cars with both,and I really liked the rev happy Cobra 4valve.I disagree,Displacement tells you alot.

Pushrod engines are simple, easy to work on and in the case of the chevy at least,inexpensive.You can drop them into just about anything and go fast.I'll take a new pushrod small block any day,How many of you have actually driven a c5 or c6 Corvette?