Chinese Longtubes vs Reputable Mid’s
#26
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2005 E55 AMG, 1991 MR2
I would say so, plus reliability. I would say it is worth it too.
Unless there are back to back dyno's of equal length long tubes vs non-equal length long tubes, I remain skeptical. Anything less than 5whp is irrelevant. Exhaust pulses travel very fast, you would have to have an absolutely perfect merge and precision tested setup to gain the benefits of pulse spacing. Making the length the approximate same doesn't necessarily give you the scavenging benefits. Race teams spend millions on R&D for this.
Unless there are back to back dyno's of equal length long tubes vs non-equal length long tubes, I remain skeptical. Anything less than 5whp is irrelevant. Exhaust pulses travel very fast, you would have to have an absolutely perfect merge and precision tested setup to gain the benefits of pulse spacing. Making the length the approximate same doesn't necessarily give you the scavenging benefits. Race teams spend millions on R&D for this.
#27
Senior Member
I would say so, plus reliability. I would say it is worth it too.
Unless there are back to back dyno's of equal length long tubes vs non-equal length long tubes, I remain skeptical. Anything less than 5whp is irrelevant. Exhaust pulses travel very fast, you would have to have an absolutely perfect merge and precision tested setup to gain the benefits of pulse spacing. Making the length the approximate same doesn't necessarily give you the scavenging benefits. Race teams spend millions on R&D for this.
Unless there are back to back dyno's of equal length long tubes vs non-equal length long tubes, I remain skeptical. Anything less than 5whp is irrelevant. Exhaust pulses travel very fast, you would have to have an absolutely perfect merge and precision tested setup to gain the benefits of pulse spacing. Making the length the approximate same doesn't necessarily give you the scavenging benefits. Race teams spend millions on R&D for this.
I make my own headers and exhausts with absolute precision and perfect fitment. I take my time and never rush the job. I don’t have to stick to a budget. It’s a hobby that pays well. Maybe that’s why I have repeat business from racing guys.
#28
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2005 E55 AMG, 1991 MR2
I don't know your background. I was assuming a local exhaust shop trying to make the best of it using good intentions. Unfortunately a proper equal length setup with real results is likely not feasible for most of us. The expertise is not common. Do you have a best guess on power improvement over stock headers?
#29
Junior Member
I don't know your background. I was assuming a local exhaust shop trying to make the best of it using good intentions. Unfortunately a proper equal length setup with real results is likely not feasible for most of us. The expertise is not common. Do you have a best guess on power improvement over stock headers?
#30
#31
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2005 E55 AMG, 1991 MR2
And are your MBH equal length with perfect scavenging?
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gblack32 (04-24-2022)
#32
Super Member
I haven’t done any tests on EL vs other Chinese crap, only Kleemann. My EL are in fact LT - the runners are 22.5” each. I’m in the process of fabbing a slightly bigger EL set for my E55 and will be going with tri-y collectors this time as I want to try and separate gases from consecutive firing cylinder in each bank. Positive pressure plays very little role in exhaust pulsing so whether it’s a “blown V8” or a N/A flat 6 is irrelevant. The car will have a bigger and less restrictive exhaust this time too so result might not be as clear cut but I will dyno the two sets for scientific purposes.
PS: Hampshire is nice. I’m an hour north of London in Bedfordshire. It has the least amount of annual precipitation in the UK which is great.
PS: Hampshire is nice. I’m an hour north of London in Bedfordshire. It has the least amount of annual precipitation in the UK which is great.
Do you make or sell your headers? Sounds like it might be profitable to do so, just saying.
I know where Bedfordshire is, but have never been there. I plan on going back in a year or so. I actually want to go look at HMS Victory..
#33
Super Member
How was the fit on the MBH headers and was the wall thickness adequate? Any "tinny" noise I hear sometimes occours with the Chinese stuff?
#34
Super Member
Think about that, the Kleeman headers are good for what 30 whp ? The EL headers picked up another 50 whp? That tells me the EL headers are a step up in flow and scavenging.
Last edited by Fountain35; 11-24-2018 at 02:16 AM.
#35
Junior Member
#36
Junior Member
Does somebody with no experience with these mods have a better idea what works the best on these cars. "And are your MBH equal length with perfect scavenging." NO, but my car still makes more than 50
HP. more than yours.
#37
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2005 E55 AMG, 1991 MR2
Alex has a highly modified car, and I believe he has done all his own work on his car. I also have a highly modified car and have done all the work on my car. What headers do you have on your car?
Does somebody with no experience with these mods have a better idea what works the best on these cars. "And are your MBH equal length with perfect scavenging." NO, but my car still makes more than 50
HP. more than yours.
Does somebody with no experience with these mods have a better idea what works the best on these cars. "And are your MBH equal length with perfect scavenging." NO, but my car still makes more than 50
HP. more than yours.
You assume you know what mods I have experience with just because I don't have them listed in my signature for my E55. This isn't my first car. Since you seem to want to prove you are better than me (which I am fine with) I have wired in standalone ecu's, sensors and tuned them, I have made intakes, upgraded cams, designed exhausts, designed and made turbo kits, replaced clutches, rebuilt engines, ported heads, made custom intake manifolds, designed fuel systems and plently of boring repairs and upgrades to suspension, brakes and a whole lot of other stuff. I decided a long time ago that I was not interested in welding as I believed that it required many years of practice and expense and I was happier paying someone to do a much better job than I could ever hope to achieve. My knowledge of long tubes consists of four books with 1-2 chapters dedicated to header theory and countless hours reading on the internet (for better or worse). Nothing more, nothing less. So far I can see your foray into header design theory and fabrication has been to pay money to MBH and I guess hopefully you installed them.
Unless you or someone else here has back to back dyno's of equal length vs non-equal length headers on the M113K engine then I guess none of us are entitled to discuss it. Most doctors don't have cancer, it doesn't stop them knowing more about it than their patients.
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GatorMB (12-09-2018)
#38
Junior Member
No,No and, No. I, like you, am very happy with my car. The headers, the modified intercooler, the 82 MM Throttle body and the other things I have done to my
E55. I have made headers before and know the work that goes into getting the desired result. MBH headers are the best available for these cars. I'm not getting into a
pissing match with you. I have made a damn good living working in the professional racing industry for over 30 years. Championships are won on the racetrack not on
the internet. I work on the quickest and fastest accelerating cars on the planet. Good day.
E55. I have made headers before and know the work that goes into getting the desired result. MBH headers are the best available for these cars. I'm not getting into a
pissing match with you. I have made a damn good living working in the professional racing industry for over 30 years. Championships are won on the racetrack not on
the internet. I work on the quickest and fastest accelerating cars on the planet. Good day.
#39
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2005 E55 AMG, 1991 MR2
That's a shame as you seem to be quite knowledgeable I would still like to focus on the subject at hand if you are willing. My argument is simply that tuned longtube headers are very difficult to develop for most people here vs off the shelf "equal length" longtubes. We are talking street cars with occasional track days, not racing cars. I believe the expense would be great and the gains although tangible would be minimal. My understanding is that aside from a whole pile of very complex calculations there is a great deal of experience required in not just fabrication, but what works and what doesn't, and that like most car parts there are trade off's in the torque curve depending on what is focussed on.
#40
MBWorld Fanatic!
No,No and, No. I, like you, am very happy with my car. The headers, the modified intercooler, the 82 MM Throttle body and the other things I have done to my
E55. I have made headers before and know the work that goes into getting the desired result. MBH headers are the best available for these cars. I'm not getting into a
pissing match with you. I have made a damn good living working in the professional racing industry for over 30 years. Championships are won on the racetrack not on
the internet. I work on the quickest and fastest accelerating cars on the planet. Good day.
E55. I have made headers before and know the work that goes into getting the desired result. MBH headers are the best available for these cars. I'm not getting into a
pissing match with you. I have made a damn good living working in the professional racing industry for over 30 years. Championships are won on the racetrack not on
the internet. I work on the quickest and fastest accelerating cars on the planet. Good day.
You in Mooresville?
#41
Junior Member
That's a shame as you seem to be quite knowledgeable I would still like to focus on the subject at hand if you are willing. My argument is simply that tuned longtube headers are very difficult to develop for most people here vs off the shelf "equal length" longtubes. We are talking street cars with occasional track days, not racing cars. I believe the expense would be great and the gains although tangible would be minimal. My understanding is that aside from a whole pile of very complex calculations there is a great deal of experience required in not just fabrication, but what works and what doesn't, and that like most car parts there are trade off's in the torque curve depending on what is focussed on.
#45
Senior Member
Alex has a highly modified car, and I believe he has done all his own work on his car. I also have a highly modified car and have done all the work on my car. What headers do you have on your car?
Does somebody with no experience with these mods have a better idea what works the best on these cars. "And are your MBH equal length with perfect scavenging." NO, but my car still makes more than 50
HP. more than yours.
Does somebody with no experience with these mods have a better idea what works the best on these cars. "And are your MBH equal length with perfect scavenging." NO, but my car still makes more than 50
HP. more than yours.
#46
Senior Member
What I would rather do is follow the common knowledge and sense in exhaust gas flow and choose headers as close to perfect as possible. Or if you think you can make them yourself - which is not that difficult - this would ultimately mean spending a lot more time on the fit up than any commercial fabricator / contractor out there would. It is exactly what I did. Originally I wanted to buy a set of headers from a well known company in Italy but they raised their price by 35% and wouldn't honour the previous quote. I thought 'screw you, how hard could it possibly be?', bought a welder, some tube and a few weeks later made my own set. I took a short TIG welding course couple of years prior to but this was my first welding project. Looking at making another version of headers for the M113K and they would still have to be of equal length. This is a fundamental principle and even if there's only 5whp to be had over a un-EL set, I'm not cutting corners ;-)
#48
"I'm not getting into a
pissing match with you. I have made a damn good living working in the professional racing industry for over 30 years. Championships are won on the racetrack not on
the internet. I work on the quickest and fastest accelerating cars on the planet. Good day."
ReplyThis must be the most humble statement i have ever read ;-)
pissing match with you. I have made a damn good living working in the professional racing industry for over 30 years. Championships are won on the racetrack not on
the internet. I work on the quickest and fastest accelerating cars on the planet. Good day."
ReplyThis must be the most humble statement i have ever read ;-)
#49
Super Member
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“I work on the quickest and fastest accelerating cars on the planet.”/QUOTE]
What would that “quickest and fastest accelerating cars” BE? AN E55 AMG???![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
What would that “quickest and fastest accelerating cars” BE? AN E55 AMG???
![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
#50
Super Member
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