Seriously, if this was really bad for the valves there would be a picture of bent or warped valves in every hanes manual and other technical books all over the world. It's been proven this is fine, especially for this short amount of time.

@europeanbourgeois8223

5 жыл бұрын

It doesn't matter what time the manifold is off for, it's perfectly safe, all of the time. It never damages the engine. The only reason we have manifold is for fuel economy and to direct exhaust gases away from the cabin.

@lanemendenhall7469

4 жыл бұрын

@@europeanbourgeois8223 and you know sound

@dreadwharf

3 жыл бұрын

@@europeanbourgeois8223 and to hide the mini explosions so people don't get burnt servicing the vehicle

@wargames43

3 жыл бұрын

I mean airplanes from WWII basically had no exhaust at all or just a small 20 CM pipe running from each cillinder. Oh well. I mean it even sounds like a plane engine this way that idles lmao

One of my buddies back in high school had a 9th gen F250 and he ran it with no headers for a number of months. Shit was unbelievably loud.

@Fopeano

6 жыл бұрын

Sounds like a fun fella!

@sprk_music

5 жыл бұрын

We life in germany and we have a 1991 F250 with no mufflers. This is already pretty loud. Cannot imagine how it sounds with no headers.

@einhundertfunfzig4919

3 жыл бұрын

@@sprk_music super englisch!

Crazy to think we've got a fire going infront of us whilst we're popping to the shop etc. It's definitely fascinating to watch the process of combustion I think

Was really cool. One of the best videos on KZread.

@Fopeano

Жыл бұрын

Possibly more credit than I'm due, but I really do appreciate that comment.

Don't get any better. Keep 'em coming.

0:36 sounded badass

People are just stupid in the comments section. They see a flame and think the engine is fucked. I swear to god if nascar could do this without catching something on fire, they would do it. There is nothing wrong with this. Back pressure is never desirable. This is the optimal exhaust system... If there were no body panels to burn.

@nazul9502

5 жыл бұрын

totally agree as a car engineer

That sounds awesome !!!! 😁😁😁😁

lol that's awesome. though if that was my car in your bay, i'd be so god damn angry. keep the videos coming, they're great. not sure why you don't have way more subscribers.

@Fopeano

8 жыл бұрын

+meatsneakers Thanks for the encouragement dude! I have few subscribers because I this is the only social networking I do. I don't use Facebook or anything else like that and don't have a smartphone, so the main way I get traffic is from KZread itself. If one big car-oriented KZreadr gave me a shout out, this channel would explode. That aside, I need to ask something. In all seriousness, why would you be angry if that was your car? I'm just looking for understanding other points of view here, not trying to argue.

@meatsneakers4755

8 жыл бұрын

+Fopeano Keep at it, the videos are entertaining. You're right - it takes one shout out or Reddit post and things grow exponentially. And no worries - my concern would be the heat from that exhaust gas shitting all over rubber boots mostly. Also, the only person that should be dicking around with my car is me haha I guess that's the main thing. It's like watching someone dance with your girlfriend.

I only thing that I cant think of for why its bad is maybe when theres no manifold the unburned gases that exit the cylinder suddenly have more oxygen so the burn and make a flame and heat up the valves more then usually, I know how someone is going to say "So what about cars that spit flames to the back" in those situations a similar thing happens, the unburned gases or even just gas mixed with air during a time when there is a spark skip during like rev limiter, all of the gases dont start burning in the cylinder but they start burning when they are exiting the cylinder and touch the hot exhaust and ignites them in the exhaust, so in my theory between the cylinder and exhaust manifold there isnt mostly a lot flames or combustion, I could be wrong 🤷‍♂️

Holy...!!! Nice vids...!! :D :D :D

Did this in my summer car and wondered if you could actually do it

Heyy regarding the burning valve thing In a HOT engine when the exhaust valve closes it apparently creates a tiny bit of vacuum which would suck cold air at ambient temperature over the hot valves when no headers are on which would in turn stress crack the exhaust valves Now in a cold engine I've done it countless times to see if it runs properly etc with no damage whatsoever.

@Fopeano

3 жыл бұрын

You are right about closing valve creating a turbulence that draws ambient air into the port, which happens regardless of engine temperature. The reason it doesn't matter is because all the solid surfaces are protected by a boundary layer of gasses that is hard to strip away. Inside the average car's cylinder during full throttle combustion, there is a controlled burning of fuel that creates around 1000psi of peak cylinder pressure at a 4000°F or so (aluminum/iron/steel melt at half that temp). The boundary layer of gasses against all solid objects prevents this from becoming a problem. For instance, engine detonation melts pistons or headgaskets because the violence that type of uncontrolled explosion is enough to strip away those boundary layers. When you think of cracking a hot exhaust manifold by spraying it with cold water, the only reason that works is because the heavy liquid easily displaces the much lighter boundary layer of gasses around the part. With that much difference in mass, it doesn't matter that there is no pressure like what detonation needs to accomplish to push the boundary layer of gasses out of the way. I'm open to all scientific criticisms of this comment.

There was a spark between you two eeewwwwooOOoOO 😍😘😘

@cbspydoge

3 жыл бұрын

(ಠ_ಠ)

Best way to clean all the shit out...

I have a slk 55 amg & everytime i haft to drop my exhuast you best believe i run it with open headers for a couple days etc shits fun & loud as hell my god do i love a v8 with open headers

Yep, this is why I do my own work.

I worked with a guy who did this to an x5, the noise hurt my chest

@catsinflorida

3 жыл бұрын

An x5??? Poor car!

I'm in the process of replacing my exhaust manifold on my Malibu and this was the first thing I looked up after a curious mind wondered what would happen if you started the engine without an exhaust manifold, apparently, nothing. lol Well, something, but it's not like you'll explode or something. I definitely wouldn't make a trip doing this as you'll probably knock yourself out with the fumes but it's amazing how many people are out there that think cars are this delicate without doing a little research first.

@Fopeano

5 жыл бұрын

Another example of that is when I first went to instructor-led transmission classes and the genius old man teaching it just dropped and slammed everything around. Stuff I thought was delicate, he would just throw down on the table like it couldn't be broken, and he was right. If you watch my trans repair videos, I'm being as delicate as possible and still manhandling things much of the time. It's amazing how tough machines that expect to be neglected are.

@ViperJay5

5 жыл бұрын

I honestly wish I would've had the opportunity to take auto repair when I was in high school but they stopped doing it there for a while, of course right when I was of the age that I could take the classes. Now I'm learning thanks to KZread and repair manuals. I'll certainly look at your transmission videos, you can never learn too much when it comes to auto repair, that's for sure.

@savagesock3598

4 жыл бұрын

You can burn a valve

@bricklayerlzdp9825

3 жыл бұрын

Safer way to keep the sound is keep the manifold on but not attached. Or header and just have it dump towards the ground

I have done that before. why not? LOL

@ns6q333

3 жыл бұрын

so you dont go deaf lol

I have the same issue would I be able to drive my car roughly 5 miles to the exhaust shop to get a new manifold put on

@Fopeano

5 жыл бұрын

Being that it's a Dodge, expecting it to go 5 miles without a problem is unrealistic, regardless of its current state of repair.

In my machine, same thing happening but only in one of exhaust port, found fire and uneven noise from one of exhaust port.what can be the possible causes?? Please help...

@Fopeano

4 жыл бұрын

fire means unburnt fuel is coming out. One port having much more than any others means there is some kind of misfire going on in that cylinder, that is not a lack of fuel problem. It could be a spark issue if you're lucky, but it could also be low compression because of a problem with that cylinder.

Im defenitly taking off the manifold of my harley lol

cool :D

what is all that debris shooting out of the exhaust ports? and does the engine run better without the manifold on?

@Fopeano

5 жыл бұрын

It's carbon deposits that got knocked loose when the manifold was taken off. It kind of coats the inside of the port/manifold and when the manifold is removed there is a broken/loose edge of carbon that is easily burned off.

@derekwall200

5 жыл бұрын

@@Fopeano i see. i thought those were metal chunks or something from either the pistons or the cylinders flying out red hot

@tidaltidaltidal

4 жыл бұрын

@@Fopeano beside of that, it contains pure CO (carbon monoxide), it'll kill you in minutes if you inside the car or closed room. That's why cars has catalytic converter.

Sounds like a v8

Omg this is some funny shit

racing cars.

It's ok to run a car with no manifolds?

Is it okay to have those flames coming out of an engine?

@Fopeano

Жыл бұрын

This has already been debated to death in this comment section, but yes it is ok.

haha Amazing

Would this mess up ur engine?

@rydoggo

6 жыл бұрын

Kevin Luna no.

@emdtunes9883

5 жыл бұрын

it would probably burn the car to the ground tho

@alexbrown4851

4 жыл бұрын

It could potentially suck down a valve if ice cold air hit a steaming hot valve and caused it to contract

@ericsens4070

3 жыл бұрын

yes it can burn up valves as there is no exhaust scavenging

Slow the video down u can almost see the firing order

Yeah, that's pretty crazy. Will probably burn up the valves if you run it too long.

@Fopeano

8 жыл бұрын

+Prepare2Survive Why would that happen?

@Prepare2Survive

8 жыл бұрын

Fopeano From what I heard many years ago it can burn the valves or valve seals because the heat doesn't flow away from them when there's adequate backpressure.

@yadiel1231

7 жыл бұрын

Dick Fageroni dude i had a 5hphonda pressure washer engine and i took off my exhaust and rode it all day until the engine blew. dont run anything for too long w/o exhaust or you WILL regret it...

@gediegengegonnt31

7 жыл бұрын

"the heat doesn't flow away from them" dude. This is the cause when there IS back pressure. In the case that the headers are removed as shown in the vid, there is almost NO back pressure causing the exhaust gas to flow freely out of the cylinder. Too much back pressure and backing up exhaust gas will burn the seals and overheat the valves, that aint the case with open headers

@johnpreston8758

6 жыл бұрын

Your exposing heated metal to cool air making it heat unevenly.

straight pipe!? no straight out!!

@Fopeano

2 жыл бұрын

Look at some of the recent NEUTRAL DROP videos. They are doing this while beating the car to death!

Valve delete

it's not fine it's a great way to suck a valve....

@Fopeano

4 жыл бұрын

15 years in the shop and 20 working on cars and I've never heard the term (never seen it either), so I googled it and found some interesting information. Seems like something that was more of a problem back when quality was worse with everything decades ago, but we are talking about a Dodge motor in this case... Although I did once have a modern Hemi that had a valve head break off during a severe overheat. Thanks for the lesson, Brandon.

@brandonshere3

4 жыл бұрын

@@Fopeano the term came from the 60s and 70s during the hotrod era and I only work on mopars when I can help it

Is this bad for the vehicle?

@Fopeano

6 жыл бұрын

Only if it's run for a long time or in a manner where the exhaust flames can burn other vehicle components, which was not the case here.

@Rx330lexuslover

6 жыл бұрын

Fopeano thanks

That's horrible for the engine it's gunna overheat

@Fopeano

7 жыл бұрын

That doesn't even make any sense. A stock engine with no coolant in it can't even overheat running for only that minute. Can you explain in any technical way how it's "horrible for the engine" or "gunna overheat"? I'm completely open to a technical discussion about this that is substantiated with facts or real world experience.

@averyalexander2303

6 жыл бұрын

I think that he might have been referring to the wiring and plastic parts around the ports. Some cars have a lot of plastic parts and wiring around the header ports, so maybe plastic parts and wiring could be melted or damaged if you run it this way long enough. Cool video though.

@Leo-lr4eq

6 жыл бұрын

Do you not know how an engine operates?

@NWAandDALvirtual

Жыл бұрын

@@averyalexander2303 No he doesnt.