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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 03-27-2009, 05:28 PM   #1
The Boat
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Variable Valve Timing

Will gm ever offer variable valve timing on LS engines? If so how much of a power increase could we see?
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Old 03-27-2009, 05:36 PM   #2
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The L99 is basically an LS3 with AFM and VVT. The VVT is really used to make engines more efficient not for more power. Because the L99 only has 1 Cam it can only change valve timing on exhaust and intake ports at the same time. If we had 4 overhead cams they could phase the exhaust and intake separately and we may see bigger differences, but then we wouldn't be dealing with an LS series engine.
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Old 03-27-2009, 05:37 PM   #3
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its possible, its already in use.... L99.
its been in use in the L92 motor as well


what I would like to see (technologically speaking) is a camless motor.
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Old 03-27-2009, 09:02 PM   #4
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I think they call it variable cam timing though. Same difference, just one shaft, not four like the LLT, or two like the LSJ et cetera. and I agree Spike. I think a camless V8 would be a cool way to leapfrog Ford and the Japanese in tech, totally bypassing the whole OHC thing.

Edit: Oops sorry double post
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Old 03-28-2009, 08:11 AM   #5
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its possible, its already in use.... L99.
its been in use in the L92 motor as well


what I would like to see (technologically speaking) is a camless motor.
I've spent some time thinking about that in the past. If you could use a solenoid to reliably and acurately open each valve, your ecm could change the whole power of your motor throughout the rpm range on the fly. It could automaticly adjust lift, duration, and overlap at the perfect time to produce maximum power while keeping the idle smooth and your gas mileage high and even keep wheel spin under control. Now as soon as I figure out how to build it I will be the most powerful gear-head in the world BWAHAHAHAHAHA!

Here is a similar idea that seems interesting but I have heard conflicting results. http://www.coatesengine.com/
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Old 03-28-2009, 09:44 AM   #6
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I've spent some time thinking about that in the past. If you could use a solenoid to reliably and acurately open each valve, your ecm could change the whole power of your motor throughout the rpm range on the fly. It could automaticly adjust lift, duration, and overlap at the perfect time to produce maximum power while keeping the idle smooth and your gas mileage high and even keep wheel spin under control. Now as soon as I figure out how to build it I will be the most powerful gear-head in the world BWAHAHAHAHAHA!

Here is a similar idea that seems interesting but I have heard conflicting results. http://www.coatesengine.com/
hell yeah. that coates site... that is some wicked stuff they are working on
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Old 03-28-2009, 11:29 AM   #7
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Quote:
Originally Posted by Robert91RS View Post
I've spent some time thinking about that in the past. If you could use a solenoid to reliably and acurately open each valve, your ecm could change the whole power of your motor throughout the rpm range on the fly. It could automaticly adjust lift, duration, and overlap at the perfect time to produce maximum power while keeping the idle smooth and your gas mileage high and even keep wheel spin under control. Now as soon as I figure out how to build it I will be the most powerful gear-head in the world BWAHAHAHAHAHA!

Here is a similar idea that seems interesting but I have heard conflicting results. http://www.coatesengine.com/
Hot Rod Magazine did an article on this back in 2001 I think. I think they put it on a Ford 5.0L and it picked up right at 100 hp and they spun it to over 8,000 RPM. I tried to find the article on-line but couldn't, and I got rid of my old magazines. Interesting stuff though. I have an idea of my own for a camless head. Now I just need a billion or so dollars to get it running!
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