That is how you say very little with very many words.. I think it should be interesting to know why the longer collector makes better low torque. I was waiting for that the whole 7:30 min
In the same way there is a reverse pulse in the primaries, there is also one from the end of the collector - a lot less useful but still nice to have and, as it's a longer overal length, it applies at lower rpm.
This is why many O.E. turbo applications use a cast iron manifold, not only does it lessen underhood temperature, but it delivers the most heat (velocity) to the turbo to spin (spool) it up faster.
Hi Terrance. A long collector is typically not necessary but a nicely tuned and smoothly transitioned header collector for a Turbocharged motor is advantageous. What is more important is that all the heat & exhaust velocity are delivered to the turbo for less lag and for best boost pressures. Remember, heat is velocity in the turbocharged world.
Thank you for watching! Please let us know if you ever have any questions or video requests. We would be happy to help in any way and love producing videos that our viewers request.
Well I have seen all your videos on pipe diameter, x pipes, and headers but could you guys do a video on what length of exhaust is best for what application and the cause and effect of too much back pressure compared to not enough. Like open headers vs a full length exhaust system on stock small blocks to built big blocks
Hi alexcockerill, We would be happy to help! Can you call our tech department and provide the year, make and model of the car the motor is in? 1-330-630-0240. We look forward to your call. Thank you for watching!
I'm really curious about connecting rod lengths and their relation to friction in the cylinder wall as well as offset connecting rods and the benefits they provide ^.^
so wait a minute....if i have 2" primary diameter, and i do 2 x 1.6 i get 3.2 inches......those headers in the video seem a bit long for 3.2 inches......did i miss somethinng
So what if you don't reduce the exhaust pipe size after the collector? Will that give you really really good low end power / torque? Or will there then not be enough back pressure at all?
Hi *****, Its really about exhaust velocity or air speed. If the exhaust pipe is too large, the exhaust will actually slow down. It is important to choose the correct pipe size so the exhaust gases keep moving as fast as they left the cylinder head. Too small a pipe may have great velocity but will back up the flow due to not having enough room in the pipe. This is where the term “back pressure” comes from. Don’t forget that H & X pipes help to share this pressure between banks on the motor and also promote better scavenging in the case of the X pipe!
+vkorinfsky, Yes, every part of the system has an overall effect on the total system. As stated in the video, there are a lot of specs or inputs that are important to your question. There is software available on the net or give us a call and we’ll help you build a parts list. 1-330-630-0240
It's not the lenght but the volume what is important and "make the difference".And there is a very simple way(empiric) to calculate it.Of course it isn't that acurate but it's working good enough.
Yes I am putting a 454 in a G body el camino I am going to use patriot mid length headers h8013 I am Planning on running 3 ft of 3 in pipe from collector b4 reducing to 2.5 in exhast threw corvair turbo mufflers is this the right direction ,??? I am usung short headers to eliminate header ground clearance issues
Hi archie harris, Can you give our tech line a call? 1-330-630-0240. This may be a lengthy discussion. We appreciate you watching our video and look forward to your call!
Those headers are shiny crap - you may get a slight improvement over the OEM cast iron exhaust but they are by no means going to give much benefit. Depending on your budget, you're going to be a damned sight better off building, or having built, a properly sized* - diameter and length - set. You can make an easy 10-20 percent difference in the peak torque and/or power between a good set and a bad one - that could be over 50hp thrown away! *For a street driven car I'd design for the estimated peak torque rpm, esp' for automatics, and for a race car for the estimated peak power rpm.
4:45 do not compare speed of sound of cold and hot air/gas , you can not say that exhaust gas has speed of sound and think on absolute speed number of cold air (1200km/h) because hot gas has higher speed of sound ( 1000degC gas has 2600km/h speed of sound)
HI conquest562, Can you five our tech line a call? 1-330-630-0240. We need some additional information from you. We look forward to your call. Thanks for watching!
Yes, the information in this video applies to any naturally aspirated 4-cycle gasoline engine. Visit www.summitracing.com/search/part-type/powersports-header-pipes and www.summitracing.com/search/part-type/powersports-exhaust-systems to see our selection of motorcycle, ATV, and UTV exhaust headers and systems.
Great video Norm!! You make me laugh!! Can you give us all a "guesstamet" (on average) of what kind of hp increase one can expect adding headers vs stock exhaust? I'm guessing about fifteen horses.
+skcharger440 I suppose one of the biggest restrictions on modern cars are the cats placed so close to the head and with aftermarket headers the cats are moved far down stream (Or removed all together) which allows for proper flow and scavaging, therefore big dyno proven increase. Now, on a classic 454 this may not be the case because maybe no cats to begin with.. still should be a worthwhile gain considering the cost for that application is significantly less which comes down to acceptable value in my opinion.
he is useing words on words, pick one word and then explain, I don't get vacuuming a void.... and then negative ok I get it then he jumps on back pressure..... words on words there
That is because you must be basically new to this concept. One needs to know the explanation behind all the technical words he is saying or talking about. If you do not understand the lingo or words he is saying I suggest you look them up and study them before you watch this video again. Just trying to help.
I’m sorry but this is a terrible explanation! I feel like he was trying not to insult the viewers and trying to dumb down his explanation. But it backfired! Just say what you need to say about the exhaust technology. Thise who can’t understand it can look it up even further if they need to.
Please practice your script and presentation. You start to confuse yourself and the viewers. I have no idea what you are trying to say at 4:00 in the video! Too many 'Uhmmms'
That is how you say very little with very many words.. I think it should be interesting to know why the longer collector makes better low torque. I was waiting for that the whole 7:30 min
In the same way there is a reverse pulse in the primaries, there is also one from the end of the collector - a lot less useful but still nice to have and, as it's a longer overal length, it applies at lower rpm.
Thank you guys for all the Quick Flicks videos. They are so informative for the beginners on up to the experienced. I have learned so much. Thank you.
That’s was an awesome explanation of the how and why plus importance of exhaust scavenging! Thank you so much!
Thanks for the explanation! There's so much to exhaust tech that really gets overlooked, or simply bypassed for lack of knowledge.
Thank you for watching!
This is why many O.E. turbo applications use a cast iron manifold, not only does it lessen underhood temperature, but it delivers the most heat (velocity) to the turbo to spin (spool) it up faster.
Hi Terrance.
A long collector is typically not necessary but a nicely tuned and smoothly transitioned header collector for a Turbocharged motor is advantageous. What is more important is that all the heat & exhaust velocity are delivered to the turbo for less lag and for best boost pressures. Remember, heat is velocity in the turbocharged world.
Thank you for watching! Please let us know if you ever have any questions or video requests. We would be happy to help in any way and love producing videos that our viewers request.
Can you do a clip telling how the merge cone size with the collector size affect the motor?
Bone Collector?
In all seriousness, I actually learned something here, thanks.
I love this stuff !!!! Give me more
Well I have seen all your videos on pipe diameter, x pipes, and headers but could you guys do a video on what length of exhaust is best for what application and the cause and effect of too much back pressure compared to not enough. Like open headers vs a full length exhaust system on stock small blocks to built big blocks
I can listen to this guy for days! excellent video!
Good tutorial value, more more more!
Thanks zarzor!
Hmm, interesting you always learn something new and i did not know about this.
sweet video! i'm looking for a set of headers for my ecotec 2.2, alpha fab sells a nice set but I'm not sure if they've done the math to set them up.
Hi alexcockerill,
We would be happy to help! Can you call our tech department and provide the year, make and model of the car the motor is in? 1-330-630-0240. We look forward to your call. Thank you for watching!
Great explain
What happens when you go to big with the diameter?
lmao!! I love this guys way of explaining things XD
Thanks, nezerac! Please let us know if you have any video topic suggestions, anything that you think would be beneficial. Thanks for watching!
I'm really curious about connecting rod lengths and their relation to friction in the cylinder wall as well as offset connecting rods and the benefits they provide ^.^
Really?
does this matter if im turbo charged
Norm.....You're awesome!
Thank you, Curtis Silver!
so wait a minute....if i have 2" primary diameter, and i do 2 x 1.6 i get 3.2 inches......those headers in the video seem a bit long for 3.2 inches......did i miss somethinng
Do header collector extensions add benefit on a system with mufflers? Or is the benefit mostly with open headers?
+MACGRUBER5000 ,
Only with open headers!
So what if you don't reduce the exhaust pipe size after the collector? Will that give you really really good low end power / torque? Or will there then not be enough back pressure at all?
Hi *****,
Its really about exhaust velocity or air speed. If the exhaust pipe is too large, the exhaust will actually slow down. It is important to choose the correct pipe size so the exhaust gases keep moving as fast as they left the cylinder head. Too small a pipe may have great velocity but will back up the flow due to not having enough room in the pipe. This is where the term “back pressure” comes from. Don’t forget that H & X pipes help to share this pressure between banks on the motor and also promote better scavenging in the case of the X pipe!
More Please!
Does this apply to vehicles with straight through mufflers on say a dual system?
How do you calculate the length of the collector?
+vkorinfsky,
Yes, every part of the system has an overall effect on the total system. As stated in the video, there are a lot of specs or inputs that are important to your question. There is software available on the net or give us a call and we’ll help you build a parts list. 1-330-630-0240
It's not the lenght but the volume what is important and "make the difference".And there is a very simple way(empiric) to calculate it.Of course it isn't that acurate but it's working good enough.
love the music
Yes I am putting a 454 in a G body el camino I am going to use patriot mid length headers h8013 I am Planning on running 3 ft of 3 in pipe from collector b4 reducing to 2.5 in exhast threw corvair turbo mufflers is this the right direction ,??? I am usung short headers to eliminate header ground clearance issues
Hi archie harris,
Can you give our tech line a call? 1-330-630-0240. This may be a lengthy discussion. We appreciate you watching our video and look forward to your call!
Those headers are shiny crap - you may get a slight improvement over the OEM cast iron exhaust but they are by no means going to give much benefit.
Depending on your budget, you're going to be a damned sight better off building, or having built, a properly sized* - diameter and length - set. You can make an easy 10-20 percent difference in the peak torque and/or power between a good set and a bad one - that could be over 50hp thrown away!
*For a street driven car I'd design for the estimated peak torque rpm, esp' for automatics, and for a race car for the estimated peak power rpm.
This stuff is great, I hate searching the internet for a PDF with value sheets for exhaust.
So can I put a collector of equal size yet 14" in length on my stock headers, and 1.75" pipes and call it a win?
Hi Jasper, we need additional information from you. Can you give us a call? 1-800-230-3030
@@SummitRacing hi, I guess I could, but I'd like to stay with the format of CZcams, if that's cool
Awesome
Someone please get this guy a script and a glass of water. Holy horrible communication skills batman.
4:45 do not compare speed of sound of cold and hot air/gas , you can not say that exhaust gas has speed of sound and think on absolute speed number of cold air (1200km/h) because hot gas has higher speed of sound ( 1000degC gas has 2600km/h speed of sound)
suggestion for a ford 460 ci?
HI conquest562,
Can you five our tech line a call? 1-330-630-0240. We need some additional information from you. We look forward to your call. Thanks for watching!
Good stuff
Hi Husam Abdulzahra,
Thank you! Please let us know if you have any questions.
This video makes me want to put exhaust manifolds on everything.
Does this apply to bikes as well?
Yes, the information in this video applies to any naturally aspirated 4-cycle gasoline engine. Visit www.summitracing.com/search/part-type/powersports-header-pipes and www.summitracing.com/search/part-type/powersports-exhaust-systems to see our selection of motorcycle, ATV, and UTV exhaust headers and systems.
Great video Norm!! You make me laugh!! Can you give us all a "guesstamet" (on average) of what kind of hp increase one can expect adding headers vs stock exhaust? I'm guessing about fifteen horses.
+skcharger440 on a stock c6 vette, Long tubes typically add 35 RWHP on the dyno (more at the engine).
+Spirited Driver I just put a set of long tube Hookers on my ls 5 454 in my '71 SS . I'm pretty sure there wasn't a 35 hp gain.
+skcharger440
I suppose one of the biggest restrictions on modern cars are the cats placed so close to the head and with aftermarket headers the cats are moved far down stream (Or removed all together) which allows for proper flow and scavaging, therefore big dyno proven increase.
Now, on a classic 454 this may not be the case because maybe no cats to begin with.. still should be a worthwhile gain considering the cost for that application is significantly less which comes down to acceptable value in my opinion.
he is useing words on words, pick one word and then explain, I don't get vacuuming a void....
and then
negative ok I get it then he jumps on back pressure..... words on words there
That is because you must be basically new to this concept. One needs to know the explanation behind all the technical words he is saying or talking about. If you do not understand the lingo or words he is saying I suggest you look them up and study them before you watch this video again. Just trying to help.
Anyone else think of jepardy when they see this guy
Hire a different person that actually knows what he's talking about.
I bet he confused them newbies
He did....
you make one then boy genius, ffs
That goes to prove you that good Headers actually Suck!,
rite Norm?
I'd like to put headers on my car, but I can't because they dont exist.
umm I think making a drawing would be rather helpful for his imagination to be understood properly
Hory Sheet wuz dat painful!!
I’m sorry but this is a terrible explanation! I feel like he was trying not to insult the viewers and trying to dumb down his explanation. But it backfired! Just say what you need to say about the exhaust technology. Thise who can’t understand it can look it up even further if they need to.
these guys must be thrown on the spot, give them a min to write it out.... and then explain.
Please practice your script and presentation.
You start to confuse yourself and the viewers.
I have no idea what you are trying to say at 4:00 in the video!
Too many 'Uhmmms'
i can't believe someone let this guy make a video. 7 minutes of poor speaking.