Ls5
 

Found it over on ls1tech:

Per Autoweek:

Three- Valve Power Boost
If you think car companies have been spending all their engineering talent developing
hydrogen-powered fuel cells or dilithium-crystal hybrids, think again. General Motors
unveiled a 6.3-liter V8 with three overhead valves per cylinder (one exhaust, two
intakes) that makes 470 hp at 6700 rpm and 385 lb-ft at 5600 rpm. Engineer Fred
Rozario says the extra valve increases horsepower by 13 to 18 percent over a two-
valve engine.
Gm is not saying where we will see the engine, but the small block is ready to go and
could be adapted for car and truck applications.

http://personal.bgsu.edu/~bjaski/GTO...O/3v_heads.jpg

cool

Jason showed me that last night... So this is officially a LS5?

volkswagon had that a while ago, and GM's Saab division had 5 valves per cylinder years ago, not really new technology, unless they make it reliable (the odd number valves tend to have high valvetrain failures compared to even numbered)

No, The rumor 6.2L is a LS3 best guess this is a LS3, A FI version would be maybe a LS5 who knows...my guess is a LS3

we have Ls1, ls2,ls4, ls6 and ls7

how many more do we need?

3,5,8,9,10


then thats it unless they wana go up to like LS26

ls3200
is ware it will end

But yet still a pushrod motor..they are easy to work on and cheaper typically for parts, but DOHC would be a little more efficient yet..

did gm make any big DOHC engines?

There were some rumors of some, but none made it to production

thats dope as hell.pushrod v8 is where its at. look at LS7. seriously, whompin on vipers and ferraris etc, with technology dating back to, hell like around 50 plus years ago.

pushrod engines have better reliabilty, and can still make decent power

I'm all for pushrod engines, don't get me wrong. They are a lot easier to work on, but GM needs something to get them out of the slump they are in. They are trying with the new warranty program, but thats only a drop in the bucket. I would HATE to see them taken over by some foreign pinheads who would change the entire line-up to 3 cyc 50hp compacts..

We 'true American's' love our big displacement engines...those no replacement for it!!

why do I feel a Tim Allen grunt coming on with that?:lolsign:

http://www.fullthrottlev6.com/forums...s/headbang.gif




Oh and.....Home Improvement owns.....Tim Allen FTW!

i see what you mean. doing it this way is more complicated. they may as well make it OHC.

except look at ford with teh 4.6 engine it was a dissapointment in the hp department for teh money spent

i think pushrod engines are proven and reliable why mess with it and make a OHC and possibly have it blow up in ur face, i think thats why GM hasnt really tried it and plus if they wanna stick with trying to make a retro muscle car OHC doesnt really fit, IMO

Point made, but if they are so concerned with retro muscle- why didn't they bring back the 'Z28' model designation?

The models IMO should have been RS, Z28, SS. With the RS being some kind of apperance package, Z28 being the V8 motor, SS having the big motor and the RS SS having it all...

But since I'm not in charge of GM I have no say..

I think it should be like the original, you could get any engine in the RS, the z28 was teh high output small block, and the ss was teh all out any v8 with good suspension (including a big block)

The LT4 in the ZR1 vette. Not sure if it is considered a big block though.

gm hasn't had a big block in the vette since I believe the early 70's (454 is the smallest one they make now)

oh ok. i was just thinking. dual cams in all the 4 bangers...some anyways

part of it has to do with rpm's the dual cams work best at high rpm's and the bigger teh engine gets the lower teh usefull rpm range (as well as safe rpm range)gets

the lt4 is not a big block.... the lt5 was in the zr1 vette and thats a lotus built gm motor...

Thanks Tony- you answered before me

The LT4 was just a slightly moddified LT1. The LT5 was the DOHC engine. Really expensive to modify and get parts for..

i bet all hondas are dual cam right? since those are good at high rpm's... VTEC baby!!!!! lol

most are, but some are sohc. The Saturns are all ohc engines too

haha... I actually heard a vtec for the first time in person last week. Some guy in an Acura was trying to beat me on the merge into a single lane on an exit ramp, i heard him step on it, then it got loud like 2 seconds later haha... I still beat him :cool:

good job paar

This is gettin off the topic now, but in Honda's defense...

I did ride in a VTEC Prelude and you can feel the power(?) when the cams switch over. Of course its nothing like power surge in a V8, and it happens at around 6500 rpm but it does do what it says.

So yes, the technology can be used to make hp, but you still can't make up for the lose of torque with hardly any cubes...

I meant to say LT5 ;)