I was wondering how Chevy intents to do this and still get it pass emissions, especially CA emissions. I know there is a lot of unlocked potental in the intake, 10rwhp from the LS1-LS6 and another 10 from a 3in ported LS6. One of my friends said something about variable valve timing. Is this the way they plan on doing it? There is only so big you can make a cam in production cars until people start to complain about a rough idle.

 

500+ Hp from a N/A 5.7L Ls-1? Highly doubtful.

 

When is Chevy intending to do this? For what car? Are you talking about the upcoming C6? I dont believe that car will have a LS1.

Anyways to answer your question, all LS1's as of right now do have the LS6 intake so scratch that off your list. Also, variable valve timing on a OHV motor would be very complex, expensive and probalby unreliable. Save that idea for OHC motors.

If GM did intend to push 500hp out of a LSx motor, the best way to go about it would be through displacement. A 5.7L LS6 can push out 405hp in stock trim. You can easily pick up a few more hp through the aftermarket with better flowing exhaust, intake and headers. Say GM gave us better flowing stock componets, that 405hp could be rasied to ~430hp. Then puch out the motor to maybe 6.0, or 6.2 liters and the hp numbers will climb even more. If the motors werent such high compression, all that would be necessary for 500hp is a blower.

 

My friend's Z28 hit over 460 on the dyno with ~12.5:1 compression. That's easily 500 at the crank. 500 at the wheels isn't that far off.

 

500hp from a 427 is what he "should" be asking.

 

427, with displacement on demand.. 500 hp with 20/28 mpg EPA rating.. that would be neat

 

I hope they dont go the OHC route or displacement on demand. That would be an aftermarket nightmare.

 

500 emissions legal hp would be a quite attainable for Chevy using an LS based engine . The tough part is making that 500 hp engine behave like a tame 350 hp LS1 . Im talking about idle quality and driveablity . Thats why you see GM sometimes doing what seems like ALOT of complicated involved changes to a particular engine to gain hp and torque and not so much just putting in a bigger cam , ect. . Cubic inches , lighweight parts and friction coatings , intake design , cylinder heads and possibly VVT are all ways Im pretty sure GM would accomplish that .

 

It definitely won't be OHC, though DOD is still up in the air for the performance marques.

 

Nobody ever said GM was going to have a 500hp motor. Nobody ever said the LS1 was going to have 500hp. Nobody ever said the C6 will use the LS1 or have 500hp.

Can you have a N/A street legal LS1 with 500 crank HP, yes very easily. There is enough HP to be made in the heads, intake, and cam that GM could esily squeeze 500hp from a LS1. Because that's "only" 425-445 rwhp. This would all require quite a bit of tuning and lots of engine development, but its possible to meet most emmissions laws on the books now and for the forseable future.

But don't think the C6 will use a 500hp LS1 for its power!

 

It won't need to. It will be lighter than the Viper (and lighter than the C5), so it will do more with less power.

 

I know the standard C6 wont have a 500hp motor, but the Z06 will, or atleast rumored to. It will have the new gen4 motor, right? I have heard that motor will have anything form VVT ro 2 cams in the block for 4 valves/cyl, and suppose to have a bumb in displacement. I just figured it would be a variant of the LSx motors.

 

Dual cam-in-block was something GM was playing around with, but won't be in the C6. Neither will 4 valves, though 3 valves wouldn't surprise me. VVT is also something GM is working on for OHV motors.

 

I read an artical in HotRod how VVT would work on a OHV engine. Forget what issue though.

 

Yes a solinoid (sp?) for each valve just like in F1.No cam at all.