probably a repost....but since I care about newbs so much, i thought I'd help them out
http://videos.streetfire.net/hottest...E74118BB4A.htm

 

wow the 21st century is awesome
who woulda thought that possible?

 

it wasnt too bad i mean didnt see anything really sweet...but whatever it was something to watch.....

 

The first experimentation with variable valve timing and lift was performed by General Motors. GM was actually interested in throttling the intake valves in order to reduce emissions. This was done by minimizing the amount of lift at low load to keep the intake velocity higher, thereby atomizing the intake charge. GM encountered problems running at very low lift, and abandoned the project.

The first functional variable valve timing system, including variable lift, was developed at Fiat. Developed by Giovanni Torazza in the 1970s, the system used hydraulic pressure to vary the fulcrum of the cam followers. The hydraulic pressure changed according to engine speed and intake pressure. The typical opening variation was 37%.

Variable valve timing was the sole domain of overhead cam engines until 2005, when General Motors began offering the LZE and LZ4, pushrod V6 engines with VVT. For the 2006 model year, General Motors will introduce the Vortec 6200, the first mass-produced pushrod engine with variable valve timing.

 

what is vtec?

 

Very
Tall
Engine
Coolant

lmao

 

Variable valve timing and lift electonic control.........if u were serious

 

Thanks for that, anyone who has really played with a dohc vtec motor and didint really know what they where looking at, that probably made alot more sense to them now.

 

Works better as very tall engine cooling.

 

I always wanted to take the 383 out of my porsche 911 and run that dohc v8 with a snail.