I don't know if this has been posted before but here goes.

The Gen 4 SBC is re3ally just a updated gen III. All gen 4 heads ect will bolt to the gen III Blocks. This months Chevy High Perormance has a pic of a gen IV SBC with three valve heads! This will be aswome in the hands of us rodders... 2 intake valves will mean much more flow potenial. I have seen LS6 castings that flow 330cfm at .500 lift. 700RWHP pump gas blown 6.0L Vettes, GTmonarO's, next Camaro ect..... Look out ford camp.

 

yea, there was a post about it before, i think it was from an article with the holden commodore or something
anyways, that would be nice to have 3 valve heads, and ford is already putting it in production in the year...2004-5 (?)

 

That's some big news I think....all those 98-02 LS1 guys looking for more air...3 valve heads! The sky is truly the limit! Throw a blower on there and you're through the roof!

 

The air flow potenial of a 3 valve big bore (4" or more) And the already awsome 15 degree valve angle will blow the small bore 5.4 mod motors away. Modern SBC gen III motors can easly be punched and stroked 427-430 cid and if you go with a C5-R block you can get 454cid. with the second intake valve controlled by a different rocker in a different location it seems you can slove the all rpm's and all tQ cam profile. Two different size intake valves with different ratio's means you can flatten out the power curve for low end grunt and high end power!!!! This could be awsome for hi power street cars.

 

It seems pretty odd.. more mechanical stuff.. it would be a less reliable engine.. I dont like it.. all they have to do is: make taller blocks for stroking capabilities and using the 11º valve angle used in the c5-r... or put more cubes in it with DoD

 

It's not really that much more "mechanical stuff". It would seem to be, but the two intake valves work off the same pushrod.

 

What happened to the variable valve timing I was hearing about if there's only going to be the one cam?

 

I wonder if we are going to see the 3v in production engines.

I liked those carbon fiber brakes as well.

 

So is there really even a "Gen IV Block"? Or is it really just new heads bolted to the same block to make a "Gen IV Motor"?

 

I thought it was just a 3 valve head made for emissions mostly.

 

will it still be called LS1, or will it have a different name?

 

The LS1 is nearing the end of its life and the 3v motor will most likely not be called that. Probably LS3 or 4 or something. The 5.7L motors are going to be phased out by the new 6.0L.

 

Good-bye 350! The end of an era........ An engine born with the Camaro.

Hello to the 6.0L future!!








Disclaimer: I know the LS1 was technicaly 346ci, but 5.7L became synonymous with the 350.

 

The 350 has been dead for years. The LS1/LS6 are 348ci.

 

Refer to disclaimer above and assumption given.