that's a hack. its a nice hack, but its still a hack. i mean its convenient that the new heads will bolt up to the GenIII, but its unnessesary. They should really be calling it Gen-three-and-a-half. Maybe GM needs more time for a throughly re-engineered new engine.

as far as single cam phasing, Ford is already doing it on their production 5.4 SOHC engines in the new F-150. The tech blurb about Ford's single cam phasing in C&D was almost word for word as what's in that pdf. all the figures like 80% effectiveness off a dual cam system and everything.

 

500HP out of a Gen IV 6.3L V8 seems reasonable

if it was a 6.3L LS6 it would put out 447HP

(405 / 5.7) x 6.3 = 447.6

now add 10% that the 3 valve heads would gain and you get 492HP not too far off from 500HP

 

Ugly engine, what the **** does it matter what it looks like.

Secondly, no its not two pushrods, its like the setup Ford uses on their 32 valve 6.0 diesels, a large rocker arm that actuates two valves off of one pushrod, old tech, but reliable.

As long as it makes power thats all that really matters in my book. Car shows are for classics, I suppose the original small block was a casanova right?

 

no, but the exhaust valve and its rocker has been relocated "out" from the edge and is pushed on by an intermediate horizontal pushrod between the rocker and the "original" pushrod that moves off the cam. didn't you see the pictures?

 

Of course it has to make power......

But I'd say, a good looking engine bay is better than a not good looking engine bay.

BTW, the Corvette team thought the LS1 was ugly too, that's why they designed those last minute "beauty covers" to hide it.

 

Yeah, really....looks are secondary. But if you really want to go the extra mile, put some time in and make it look nice while you're at it. LS1 development was a little rushed....they wanted to clean it up a bit, but needed it ready for launch with the new Corvette in '97.

 

nevermind that the LT1 also had injector covers on the vette...

 

Exactly.

Plus, there are a lot of other cars that are using covers of different sorts to dress up the engine bay.

 

All it would take to "clean" or "beautify" the LS1 or this new Gen IV would be some big bold valve covers that say CORVETTE or Chevy or even the motor designation. Something that would cover the injector and individual plug magnitos. Ever seen a LS1 Camaro with some Katech valve covers and magnitos's reloacted under the cowl, looks SWEET! However this would detract from the whole basic premise that OHV motors like this one are smaller and more compact to fit under lower hoodlines. As opposed to OHC motors. GM thankfully won't detract from the engines purpose to make it look good. Form follows function.

 

Has anybody heard of future caddy v8's. I know that their new baby is the xv12, but does anybody else think that they need to make the 4.6 northstar a little bigger.

I would like to see GM make a new DOHC v8 for caddy with all the high tech goddies from the xv8 concept, except for the dual in block camshafts. I like having the ls1 in the cts-v, but l would like to see a DOHC v8 in it. It seems to me that it would be a more fitting engine for it than the ls1. Don't get me wrong, i love the ls1, but i don't see it as a caddy engine.

 

Yeah, it wouldn't take too much. You could really clean up that engine by using C5R valve covers and repositioning the coils.

The red Silverado SS concept from afew years ago had this treatment...and I thought it really looked sharp. Very clean, everything in it's place, and no need to "hide" the engine.

I wish I could find a link to the engine bay.

EDIT: Here's the truck if anyone's got a pic of the engine.
http://www.maximum-cars.com/Cars/Car.php?carnumber=177

 

That 3V head is the POS hack I have ever seen. Geez I would of thought that the engineer wouldn't have chanced bringing that design up for fear of getting laughed out of the room.

If that really is the GenIV answer to the Hemi and the Ford 3V/4V Mod motors, GM is going to be the laughing stock for years to come.

7000rpm safely? Maybe for about 2 seconds before that middle rod drops out. Not to mention triple racing grade valvesprings to try and control that mess. Or maybe they'll put a rev kit in.

Time to bite the bullet. Either copy the hemi or go overhead cam for 3 and 4 valve motors.

 

Until I hear otherwise....I'll trust what the engineers are saying. If it works, who cares? Besides, the Hemi was behind before it even reached market. 16 spark plugs?!?!? Find me an affordable OHC setup that can exceed the LS1/LS6's performance and I may begin to think otherwise.

GM's already proven that they know what they're doing in engine design with the LS engine line.

 

Yes...yes... GM purposefully went with a design that will self-destruct so they can pay out tons and tons of money in warranty claims over and over again... not to mention shoot themselves in the foot as far as rebuilding their quality reputation, which they have done so well at recently. Obviously a profitable choice.



Don't worry, I'm sure they did their homework.

 

Copy the Hemi? Errrr, no thanks. Slap the hallowed "Hemi" label on an engine and it gets instant cred right? To the layperson probably, but in engineering circles I don't think it's viewed as being all that impressive.