DIYEFI.org Forum

http://en.wikipedia.org/wiki/Tucker_Torpedo
neat story

http://www.autoweek.com/apps/pbcs.dll/a ... feed=rss01
company Valeo is in this pretty far, possibly releasing engines for their french cars this year.

howdy, long time no post. my main distraction is back on the road! aside from the other distractions, mainly the lemon race in about a month, I'm back on this. I'm not found of pneumatic, it is very on/off, not controllable. hydraulic is definitely a possibility but would like to avoid the complicat...

full project log here:
http://www.e30tech.com/forum/showthread ... 17&page=13

now that this is back on the road I have some time to get back to that valve project I posted about..

i have no idea what the answer to that is.. I just sort of assumed that you would need variable lift to throttle back, but i suppose shortening the intake time should have the same effect. another thing to consider is that partially opening the valve could let you maximize the opening time, where 10...

the oil would be for the solenoid itself, most would stay up top just like the normal cam arrangement uses. there's a few reasons that I want to keep a spring, but it doesn't have to be nearly as hard as they are now. First off it's a fail-safe for losing power or something, the valve just stays clo...

i'm using 10k as a sort of guideline/goal in terms of component selection for the operation frequency, computer, etc. You guys are probably right that the solenoids themselves won't be able to keep up, but if i keep 10k as the goal then what comes out should be just plain fine at 5k. the hydraulic a...

well, that's the biggest problem right there.. the more megnetic force we need, the more ferrous material there has to be, which is more weight, so we need more force... but don't jump to the conclusion that it will be a lump of iron. At the rate of open/close for 10krpm, we're dealing with times in...

i'd like to avoid rockers if possible.. you're right that most of the time we won't need that much force if there isn't an insane spring to fight, but we will have to lay down that sort of force to avoid float at higher RPM. but at idle/low rpm we should be able to reduce those losses quite a bit. a...

Have you considered winding your own solenoids? I remember once upon a time having a way to calculate the force based on certain dimensions, voltage and gauge of wire. If you keep the valve springs I can only imagine that you're going to need a pretty hefty solenoid. that's sort of the plan. :) the...

no worries, i'd just like to keep focused on the valve control itself here.