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1. Variable Valve Timing anyone? (score: 1): Author: Gary Boone <gboone@sisna.com>; Date: Wed, 16 Jan 2002 12:28:22 -0700; Here's an interesting idea for an upgrade to the roadster engines. It's already possible to have electronic ignition and fuel injection on an original roadster engine, so might as well make it modern; /html/datsun-roadsters/2002-01/msg00585.html (7,961 bytes)
2. Re: Variable Valve Timing anyone? (score: 1): Author: Thomas - Sweden <csp311@telia.com>; Date: Wed, 16 Jan 2002 20:39:30 +0100; Wait a few years and there will not be any camshafts in the engines. Thomas /// datsun-roadsters@autox.team.net mailing list; /html/datsun-roadsters/2002-01/msg00587.html (8,642 bytes)
3. RE: Variable Valve Timing anyone? (score: 1): Author: "Mitch Planck" <mitch@ias.net>; Date: Wed, 16 Jan 2002 14:47:29 -0500; I agree - why can't you use a computer controled solonoid or something along those lines to actuate the valves? Mitch Planck Chelsea, MI '69 1600 '70 1600 --Original Message-- From: owner-datsun-road; /html/datsun-roadsters/2002-01/msg00590.html (9,319 bytes)
4. Re: Variable Valve Timing anyone? (score: 1): Author: Gary McCormick <svgkm@halley.ca.essd.northgrum.com>; Date: Wed, 16 Jan 2002 12:14:38 -0800; That has been in the works, or at least under investigation by various interested parties, for over a decade. The hitch lies in developing a fast-acting solenoid or other controllable actuator that d; /html/datsun-roadsters/2002-01/msg00592.html (10,724 bytes)
5. Re: Variable Valve Timing anyone? (score: 1): Author: RWM <RWM@rwmann.com>; Date: Wed, 16 Jan 2002 15:43:45 -0500; A number of present and former F1 engines uses pneumatic, hydraulic, piezoelectric, magnetic or other forms of indirect valve actuation, and some of those buzz to 18,000 RPM. - RWM -- R.W. Mann & Com; /html/datsun-roadsters/2002-01/msg00594.html (11,973 bytes)
6. Re: Variable Valve Timing anyone? (score: 1): Author: Gary McCormick <svgkm@halley.ca.essd.northgrum.com>; Date: Wed, 16 Jan 2002 12:53:12 -0800; Now we just have to wait for that technology to trickle down to road-going Gary McCormick /// datsun-roadsters@autox.team.net mailing list; /html/datsun-roadsters/2002-01/msg00595.html (12,730 bytes)
7. Re: Variable Valve Timing anyone? (score: 1): Author: RWM <RWM@rwmann.com>; Date: Wed, 16 Jan 2002 16:03:52 -0500; Honda VTEC is a consumer version. The really radical stuff has to trickle WAY down in cost. Some things never change: "Horsepower costs money. How fast do you want to go?" - RWM -- R.W. Mann & Compan; /html/datsun-roadsters/2002-01/msg00596.html (14,019 bytes)
8. RE: Variable Valve Timing anyone? (score: 1): Author: "Brian Hollands" <bholland@hayes.ds.adp.com>; Date: Wed, 16 Jan 2002 16:17:51 -0500; Supposedly the 2004 BMW 745 will have lost it's camshafts - That's why - among other reasons - the 48 volt electrical system Ken - Have you heard any more about that? I guess I'll be waiting for it t; /html/datsun-roadsters/2002-01/msg00598.html (8,831 bytes)
9. Re: Variable Valve Timing anyone? (score: 1): Author: Daniel Neuman <dneuman@quark.sfsu.edu>; Date: Wed, 16 Jan 2002 15:30:02 -0800 (PST); I think that I would want to see how these vlaves worked in several different car engines over long periods of time. Would they still work after 50,000 miles? What about intake deposits on them or ca; /html/datsun-roadsters/2002-01/msg00602.html (9,313 bytes)
10. Re: Variable Valve Timing anyone? (score: 1): Author: "datsunmike" <datsunmike@nyc.rr.com>; Date: Wed, 16 Jan 2002 19:14:36 -0500; And let's not forget cost and reliability. I think Renault F1 engines operated with pneumatic actuated valves. Mike interested parties, other along It's all the /// datsun-roadsters@autox.team.net ma; /html/datsun-roadsters/2002-01/msg00608.html (12,075 bytes)
11. Re: Variable Valve Timing anyone? (score: 1): Author: Thomas - Sweden <csp311@telia.com>; Date: Thu, 17 Jan 2002 02:40:12 +0100; F1 engines still have camshafts but no valvesprings. Renault was first and the others followed. They use air- or oilpressure to close the valves. Regular valve springs don't function properly above 1; /html/datsun-roadsters/2002-01/msg00612.html (13,257 bytes)
12. Re: Variable Valve Timing anyone? (score: 1): Author: "James Moore" <james.moore14@worldnet.att.net>; Date: Wed, 16 Jan 2002 20:45:37 -0500; Electronically operated valves have one major drawback...noise.....ever sit and listen to a modern fuel injected engine? Those injectors make a heck of a racket. And those are just little pintles sla; /html/datsun-roadsters/2002-01/msg00613.html (10,477 bytes)
13. Re: Variable Valve Timing anyone? (score: 1): Author: "Scott Perschke" <s.perschke@mindspring.com>; Date: Wed, 16 Jan 2002 20:49:57 -0500; This is what BMW has now on its new 745i. No throttle body, just controlled opening of the valves, thru a cam on a cam, totally mechanical system. All the fuel injection and the 2nd cam action is con; /html/datsun-roadsters/2002-01/msg00614.html (11,719 bytes)
14. Re: Variable Valve Timing anyone? (score: 1): Author: Dat2000srl@aol.com; Date: Sat, 19 Jan 2002 13:46:33 EST; Is it possible to acheive variable timing by adjusting an idler pulley on the timing chain. Intead of having the slack on the back side of the chain, have a set of rollers or gears that can be moved,; /html/datsun-roadsters/2002-01/msg00763.html (8,386 bytes)
15. Re: Variable Valve Timing anyone? (score: 1): Author: RWM <RWM@rwmann.com>; Date: Sat, 19 Jan 2002 13:58:01 -0500; The driven side of the chain defines the geometry; the idle side has no influence. A variable cam sprocket (variable degree wheel) would provide the effect you seek, but is a complex undertaking. - B; /html/datsun-roadsters/2002-01/msg00764.html (9,248 bytes)
16. Re: Variable Valve Timing anyone? (score: 1): Author: Thomas - Sweden <csp311@telia.com>; Date: Sat, 19 Jan 2002 20:13:33 +0100; Alfa Romeo did something like that on the intake cam for a while on the 4-cylinder. Maybe 20 years ago? Thomas /// datsun-roadsters@autox.team.net mailing list; /html/datsun-roadsters/2002-01/msg00766.html (8,768 bytes)

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