View Full Version : In cylinder vid
superchargedsam
03-10-2007, 09:31
http://video.google.com/videoplay?docid=-5815350492893860613&hl=en
Nice find on GT4oc
Jiff Lemon
03-10-2007, 09:39
watched a few weeks ago (and meant to post on here!). Bloody fascinating stuff!
superchargedsam
03-10-2007, 09:51
only shame is doesnt seem to show the full cycle with the overlap but none the less awesome bit of footage and so clear to, be interesting to see what Tony thinks of the flame front and how it moves in the chamber and where it starts from as doesnt seem on first look to start where it should!
Sponge Bob
03-10-2007, 11:45
Wow... what a great video...
But I can't work out whats happening as once it has combusted and pushed the cylinder down, the left valve opens first - is that letting exhaust out, because it looks like the right one is with all the white gas (although it looks like it's coming into the chamber - but that's not fuel surely? It's too white...
weegaz22
03-10-2007, 11:49
Wow... what a great video...
But I can't work out whats happening as once it has combusted and pushed the cylinder down, the left valve opens first - is that letting exhaust out, because it looks like the right one is with all the white gas (although it looks like it's coming into the chamber - but that's not fuel surely? It's too white...
yep, left is exhaust valve and right is the inlet with the atomised fuel coming in
Sponge Bob
03-10-2007, 11:54
Sweet... now all we need is one inside a turbo as it spools up!! probably a bit easier as could whack it into the intake side and add some smoke to the filter as it sucks it up!!
superchargedsam
03-10-2007, 14:21
ash about 30 mins of flat out driving at night and then open the engine lid and you should be able to see the impeelers spiining inside the near molten turbo housing lol, have been in a 323 4wd turbo where it got so hot the housing on the zorst side was white hot and see through was most impressed!
millentubby
03-10-2007, 15:39
Is it me or is the inlet valve not seating properly?
Sponge Bob
03-10-2007, 15:41
Now Sam - I've always wondered... does the metal literally go see through... or is that just a figure of speech - if so... how!!!!!!!! lol
superchargedsam
03-10-2007, 16:20
Ash not literally see through but once it gets to a white hot state you can definatly see the impeller inside it, AFAIK the white hot state is the one after redhot so is damned hot thats for sure and no idea what temprature this has to be, I was out with a prodrive instructor at about 3am and we pulled into the darkest place we could find to se it but TBH didnt need to be that dark as was easy enough to see! Its like when you see the brake discs on WRC and occasionally F1 (like tha last F1 in Fuji where they biased more rear braking to aid wet stoppage!) glowing red hot. Millen yes the consus on the 4oc is that the inlet valve has a problem with seating due to burn in that area!
AFAIK the white hot state is the one after redhot so is damned hot thats for sure and no idea what temprature this has to be
.... IIRC about 1200-1300c for white, depending on the composition of the steel (a cast manifold would have melted around 1100). Red hot steel is roughly 700 to 950, then its orange to lemony yellow prior to white hot.
weegaz22
03-10-2007, 18:51
I dont think its real. Look at the spark. Its like its being run off Ac current with a nice long arc duration. I dont think the ecu fires the ignition in that fashion....although i could be wrong, just looks iffy. :)
I think this is some kind of demo. Also, wheres the light source coming from?
Still, a good representation of events.:thumbsup:
Bob regarding the metal going see though; It goes like frosted glass a little so you can see through it but not in any real detail.
id say the duration is fine, think about the contact area on a rotor arm passing the contact pin in a distrubutor cap, it will spark all the way through that, remember this is a very very slowed down version of the cycle compared to how the pistons would be running at idle or even at 7000+rpm
and as for light source its probably coming from the borescope that the camera is attached to
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions Inc. All rights reserved.