awsome in cylinder combustion video

[RayArroyo]

http://video.google.com/videoplay?do...93860613&hl=en

[delspool]

damn! that must be a pretty crazy camera to be able to cope with that pressure/heat

[Buster]

thats really awesome!! Its slowed down alot though right?

[nopistons94]

Originally Posted by Buster

thats really awesome!! Its slowed down alot though right?

dude, think of it this way ok...

if you held your cars engine at 3,000 RPM for a minute, thats 3000 revolutions per minute. Theres 60 seconds in a minute obviously, so divide 3000 by 60, and you get 50. So that happens 50 times a second...

yes its slowed down

[Buster]

thanks man, I really didnt know that lol. I hate the internet, no one knows who is kidding lol.

[BlackBulletTSi]

lol ****in sick

[97TurboDSM]

i might get laughed at for this but i dont care. exhaust valve on the left and intake valve on the right? or am i just an idiot?

[nopistons94]

Originally Posted by Buster

thanks man, I really didnt know that lol. I hate the internet, no one knows who is kidding lol.

no problem man, didnt mean to seem like an ass either

Originally Posted by 97TurboDSM

i might get laughed at for this but i dont care. exhaust valve on the left and intake valve on the right? or am i just an idiot?

yep, that white mist looks a lot like gas & air, and then after the combustion phase, the exhaust valve (left one) surely would open

[jc8889]

I thought it would be more of an explosion, looked more like a fire. Pretty cool though.

[zerioustt]

Originally Posted by nopistons94

no problem man, didnt mean to seem like an ass either



yep, that white mist looks a lot like gas & air, and then after the combustion phase, the exhaust valve (left one) surely would open

yes intake right exhaust left....gas and air come in, combust then leave through exhaust valve.

[NOPSTNS]

awesome vid bro! but

wow i just lost some brain cells, is the vid slowed down? no keith its just idling at 4 rpm.

intake on left? wow.....just...wow.....

car enthusiasts? anyone on here one of those?


jk take a joke....

anyone else think that ignition timing is a lil late...whats that runnin at? 5 degrees BTDC? that sucker practically ignitied AT TDC, whats that about?
ray do u kno which engine this is from? is it runnin 83 octane or is it just at idle and theres no load?!

[97TurboDSM]

its cool i wont ask anymore questions.

[EvlEgl]

**** em, Ask away!!!

Sweet video

[TROLL]

yeah i agree, when 'em' = 'frank'. how about creating a positive and encouraging learning environment here buddy? we're not all master techs... everyone is at a different point in their automotive education.

and jc8889... i believe thats exactly what an explosion looks like... its an element(s) igniting extremely fast and expanding... which is what creates the incredible force outward. i think thats what any explosion would look like if it were slowed down a lot.

very cool vid though... you can totally understand how it works and picture it in your head a million times but its not the same as seeing it actually happen.

[240sxDann]

Originally Posted by jc8889

I thought it would be more of an explosion, looked more like a fire. Pretty cool though.

a very widely believed thought. It is actually a highly controlled burn. The only time you get an "explosion" in the cylinder, is when you have knock. Thats what causes knock.

[Dave]

Originally Posted by 240sxDann

a very widely believed thought. It is actually a highly controlled burn. The only time you get an "explosion" in the cylinder, is when you have knock. Thats what causes knock.

detonation you mean.

frank, i believe they have the engine dialed waaay back to make conditions more survivable for the camera

[240sxDann]

Originally Posted by Dave

detonation you mean.

frank, i believe they have the engine dialed waaay back to make conditions more survivable for the camera

ah yea, sorry.

[Verocious]

Originally Posted by NOPSTNS

anyone else think that ignition timing is a lil late...whats that runnin at? 5 degrees BTDC? that sucker practically ignitied AT TDC, whats that about?
ray do u kno which engine this is from? is it runnin 83 octane or is it just at idle and theres no load?!

Damn, the link wont open for me. I tried to find it on the web but couldnt.

Ignition timing kind of works the other way. Unless you are running really low octane like you said, 83. You normaly run less ignition timing under high load and more ignition timing under low load.

Andy

[NOPSTNS]

define more and less timing, i call it advanced and retarded. im sayin if he was runnin high octane itd be runnin like 10-20 BTDC that vid is showin it sprkin at mayb 5 BTDC which is like nothing. if he had piss gas then maybe id see it runnin 5 BTDC.dont quote me but ive ran ignition checks on my car during my coil testing and when i put er under a huge load its run to almost 60 BTDC and at idle its 5 ATDC....dunno if its the same or diff on other cars but i kno 60 degrees btdc is kinda nuts on those piston thingys so it all my be apples and oranges.....

and i agree with dave now that i think about it, they prolly dialed it all back so the camera would survive! still a great vid.....saved to favs



and ps,

sorry brian

[Verocious]

More ignition timing is 20 btdc, less timing is 10 btdc.

Like I said, ignition timing is based off of load. When you say you are putting the car under a huge load, how are you doing it? Lets take a 500whp Supra on pump gas for example. At idle ignition timing will be around 11-15*. At peak torque when VE is highest, the timing will be around 8* and only slightly ramp up to redline. That same motor tuned to 400whp will still idle at 11-15*, but now take around 11-12* of timing at peak torque.

Piston and rotary engines still have the same tendencies when it comes to ignition timing.