05-22-2008, 09:05 AM | #15 | |
I used to be Dragoneye...
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Quote:
http://media.gm.com/us/powertrain/en...FV6/08_LLT.doc |
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05-22-2008, 09:41 AM | #16 |
Drives: '94 Camaro Z28 Join Date: Mar 2008
Location: Ontario
Posts: 34
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Found this pic over on CZ28 and didn't see it here...which 3.6 do you think this is?
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05-22-2008, 10:06 AM | #17 |
Drives: 2012 Camaro SS Join Date: Nov 2006
Location: Chicago/Carbondale
Posts: 815
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^^^^^^^^^^^^^ Why have i never seen that before???!?!?!?!?!!
Can you give us the link cause i cant find the thread? Nevermind, found it.
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-Tim
Last edited by AirGoya; 05-22-2008 at 10:21 AM. |
05-22-2008, 10:22 AM | #18 | |
Drives: '94 Camaro Z28 Join Date: Mar 2008
Location: Ontario
Posts: 34
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Quote:
http://www.camaroz28.com/forums/show...=607253&page=2 post #26...there isn't any other info other than the pic...so I was just curious if anyone else had some input. EDIT: more photos here --> http://www.camaro5.com/forums/showthread.php?t=4207 |
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05-22-2008, 10:58 AM | #19 |
Account Suspended
Drives: 2010 Camaro 2SS/RS Join Date: Apr 2008
Location: New York
Posts: 3,746
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This fact will expose ME for the science geek that I am. Throttles are used on jet engines as well as rocket engines and work in similar fashion to the way they do on newer engines. They've been using these types of "throttle" mechanisms for decades.
I don't think we need to change our terminology just because the hardware has advanced in our cars. P.S. Throttle is also a verb! |
05-22-2008, 11:45 AM | #20 | |||
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Quote:
Quote:
Folks, I stand corrected. GM's DI is NOT throttleless. I'd assume that it does open the throttle a lot more than a traditional gasoline engine, though, so maybe it still has some of gains found in a throttleless GDI engine.
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Removing weight has surprisingly little effect on fuel economy
Engine break-in procedure | Gear ratios 2002 GMC Sierra 4x4 5.3 (190,000 miles and going strong) 1980 Buick Lesabre family heirloom with 36,000 miles 2008 Volkswagen Rabbit 2 door I5-2.5 5spd DD lease Quote:
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05-22-2008, 02:41 PM | #21 |
Drives: X-15 Velocipede Join Date: Mar 2008
Location: SW Florida
Posts: 4,637
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BMW Valvetronic & Nissan VVEL
Here you go my friends...
The motivation behind our patented Valvetronic technology was simple: to enable the engine to breathe more easily. Our engineers believed that this would allow for increased power output and optimized fuel efficiency, and they were right. It was accomplished by varying the lift height of the valves to regulate intake instead of using a traditional throttle. At lower engine loads, the valves only open a small amount, and at full power they open completely. http://www.bmwusa.com/Standard/Conte...WPtfhQPZGVdw== And here: Nissan says about 35% of the parts are unique to the 3.7L VQ, and the major new addition is the electronically adjusted variable valve lift (Variable Valve Event and Lift), imparting a “throttleless” effect not unlike BMW AG’s Valvetronic, which also markedly reduces pumping losses by essentially throttling the engine with the intake valves. http://wardsauto.com/reports/2008/te...ssan_3-7l_v-6/
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05-22-2008, 04:16 PM | #22 | |
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Drives: 2017 Camaro 2SS 6MT Join Date: Aug 2006
Location: Cleveland, Ohio
Posts: 4,372
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Quote:
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05-22-2008, 10:43 PM | #23 | |
Drives: X-15 Velocipede Join Date: Mar 2008
Location: SW Florida
Posts: 4,637
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Quote:
This explanation below explains both - Valvetronic and VVEL are the extreme modern version of the earlier systems which now seem primitive compared to infinite lift control. VTEC (which stands for Variable Valve Timing and Lift Electronic Control) is an electronic and mechanical system in some Honda engines that allows the engine to effectively have multiple camshafts. As the engine moves into different rpm ranges, the engine's computer can activate alternate lobes on the camshaft and change the cam's timing. In this way, the engine gets the best features of low-speed and high-speed camshafts in the same engine. Valvetronic and VVEL Several engine manufacturers are experimenting with systems that would allow infinite variability in valve timing. For example, imagine that each valve had a solenoid on it that could open and close the valve under computer control rather than relying on a camshaft. With this type of system, you would get maximum engine performance at every rpm range. Something to look forward to in the future... SOURCE: http://auto.howstuffworks.com/question229.htm Like I already said, welcome to the future!
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