The Facts Behind Harley Exhaust Backpressure
Vložit
- čas přidán 19. 02. 2024
- Gale Banks of Banks Power Says What We've Been Saying For Years! An Often Misunderstood Concept is How Backpressure Reduces Power Output and Throttle Response on Your Harley.
⬇️⬇️⬇️⬇️⬇️ Click Show More Below ⬇️⬇️⬇️⬇️⬇️
#harleydavidson #motorcycle #power #tech #tips #bankspower
🎬 VIDEO LINK to Backpressure Myth - • Performance Harley Exh...
✅Harley Exhaust, Myths & Facts - www.dkcustomproducts.com/harle...
🎬 **Thunder Torque Video Playlist** - • DK Custom Thunder Torq...
🔗 Thunder Torque Inserts™ Fitment Page - www.dkcustomproducts.com/choos...
🔗 Thunder Torque Inserts™ Product Page - www.dkcustomproducts.com/thund...
🏍️ Thank you for tuning in! Be sure to Like / Comment / Subscribe
✅ Get Your DK Custom Products Here
www.dkcustomproducts.com/
🛒 Our Gear & Amazon
Check out our new Amazon page for the gear we use!
www.amazon.com/shop/dkcustomp...
➡️ SOCIAL MEDIA - CONNECT WITH US
/ dkcustomproducts
/ dkcustom1
/ dkcustom
/ dkcustom
📸 Our Camera Gear: www.amazon.com/shop/dkcustomp...
EMAIL: Support@DKCustomProducts.com
The DK Team - Auta a dopravní prostředky
I've fought with people for so long now about back pressure, "small motors need back pressure, I put a bigger exhaust and killed my low end", but they don't understand that going to a bigger exhaust lowers velocity and increases back pressure.... I love your guys video!!!
Wouldn't a big pipe possibly reduce the efficiency of the scavenging effect and not increase back pressure.
Glad you like the video! Thank you for commenting! MB
A big pipe does not increase backpressure, but it does increase reversion and slow down exhaust gas velocity, which will rob power, the same as backpressure robs power. KP
@@DKCustomProducts
I hadn't thought of it that way but it makes perfect sense. Back pressure Myth goes way back. Water going through a radiator to fast is another.
👍😎👍
Old school bikers used to do that back in the day . My Dad and uncle’s did it . They were called lollipops back then .
Lollipops do work, but the Thunder Torque Inserts™ utilize a patented design that works 200% - 500% better than lollipops. The unique shape Speeds up Exhaust Gas Velocity, in addition to reducing/eliminating reversion. Two major keys to power.
www.dkcustomproducts.com/thunder-torque-inserts-c57-337.htm
Gale Banks is brilliant! Been following him since the very early 2000’s when my dad got a 2001 duramax.
I think people say you need back pressure because often when they’ve taken away back pressure and saw a power decrease and don’t realize you’ve lost the velocity
We agree! Thanks for commenting! 😎 MB
Good show. I have a RB racing 2-1 black hole , had it for 10 yrs, a little loud, but works well . My friend just installed thunder ports, loves them..
Sorry, thunder torque
That is awesome! Glad you are happy with the Thunder Torques and seeing the benefits of having them installed.
Thank you for your business and for commenting! MB
Agree totally, we used to do/call this header tuning back in the small block Chevy days 👍
Glad you like the video and understand backpressure! Thank you for commenting! 😎 MB
great info guys!
Glad you like the video! Thank you for commenting! MB
While you are using Gale Banks to help prove your information about back pressure, keep watching his videos. He uses Amsoil in all his engine builds. You can continue to learn from his advice.
Amsoil is a great lubricating oil! Thanks for commenting! MB
It’s amazing how many things people believe just because they heard it from somewhere, especially the “engines need back pressure” myth. Cmon people, use that mushy thing between your ears and think about it for a second: How does pressure going against what the engine is trying to pump out make the engine run stronger? It doesn’t.
It certainly does not! Thanks for commenting! 😎 MB
I was one who was part of this myth for years. I think maybe what happened, whether it matters or not, is back pressure was something we dummies could "understand". Reversion on the other hand, was something we didn't understand and it was dropped from our vocabulary. But reversion is actually 1/2 of the formula, for the problem being discussed. And not understanding reversion is like trying to bake a cake without an oven.
I’ve worked in power plants for 25 years and we have back pressure regulators in air and water systems. You have to understand the purpose of back pressure. I’ve tried explaining it to different people when they say their bike needs back pressure. You need to reduce reversion and increase exhaust velocity. Some people just don’t grasp it. They repeat what they’ve heard and can’t explain why.
Some people just can not understand no matter what terms you use!
Thanks for commenting! 👍 MB
Spot on 😊
Glad you like the video! Thank you for commenting! MB
Please make a Thunder Torque Insert specifically for the Rinehart bagger slip-ons. Ones that can be installed in the typically thick black exhaust tips. Your current models have threaded lengths too short to go all the way through the Rinehart exhaust tips. LOTS of those slipons out there!
I have TTI’s on my two Dynas with D&D 2 into 1 pipes, and on my Low Rider ST with Rinehart twin slipons. They make a night and day difference to the low end torque.
We do now have Long Thread Thunder Torque Inserts available.
Here is a video on them that you may find helpful- czcams.com/video/naqPtEcDcU0/video.html
If you go to the size thunder torque you need at the link below. Scroll down the description too the fitment notes. You will find a link to take you to the Long Thread TTI's. - www.dkcustomproducts.com/catalogsearch/result/?q=thunder+torque+insert
Please feel free to contact us with any questions or help ordering;
Support@DKCustomProducts.com
662-252-8828
Thanks for commenting! MB
Good video, so many are only concerned with sound tho a good exhaust sound and performance are not mutually exclusive. Be choosy, it pays dividends
Yes, some care more about sound than they do performance! Thank you for commenting! MB
TTIs are awesome! Put them on my TC 103 running Magnaflow tru duals,4.5” Hitman exhaust and I gained at least 200 rpm ( lowered) my torque band. I haven’t dynoed it since but seat of the pants dyno tells me probably 10-20 lb ft gain. Well worth it!
Awesome, I am glad you are well pleased with the TTI's and that you are feeling the benefits of having them installed!
Thank you for your business and for commenting! MB
Great video alot of people you talk to think backpressure is good
Glad you like the video! Thank you for commenting! MB
The TTI’s work great on my bike!
Glad to hear it! Thank you for your business and for commenting! 👍😎👍 MB
If you put a nozzle on your hose it will increase the velocity of the water leaving the nozzle, but it will not fill a bucket quicker. A hose without a nozzle will fill the bucket quicker. It's a restriction so how is increasing the velocity, but decreasing the mass flow help exhaust gasses move out of the cylinder faster?
The unique & patented design of the TTI's increase exhaust gas velocity speed with very little restriction. This increase in speed, results in an increase in volume, and also encourages scavenging.
This results in a better fill charge on the intake stroke, which results in a stronger combustion stroke, which results in more Torque.
Taking the baffles out or running open free flowing exhaust eliminates back pressure (restriction), but then you have reversion. That is where the TTI's come in and reduce reversion and speed up the exhaust gas velocity bringing back the torque.
This video explains this subject very well - czcams.com/video/pr6z00gL5Yg/video.html
Here is a written report where you can see pictures of how exhaust gases flow and where the TTI's come into play with preventing reversion that you may find helpful - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Here is the full video to this short that you may also find interesting - czcams.com/video/P5s8YKEb0gE/video.html
Thanks for commenting! 😎 MB
Let's see who argues with Gale Banks.
Yeah, should be interesting. 👍😎👍 KP
Agreed, I see people buying ridiculous high price exhaust systems with crappy performance. IMO thunderheaders are great pipes that they don't need fancy advertising campaigns to succeed. My dual exhaust system doubles as a leaf blower
Thunderheaders are great pipes, and they produce even more power when used with Thunder Torque Inserts™.
www.dkcustomproducts.com/thunder-torque-inserts-158-model-family-dk-tti-158.htm
KP
I had catless head pipes and tab zombies on my 124.
Even with a really good tuner the thing rode like ass under 3k. Dude had to throw tons of fuel at it under 3k bc the exhaust kept scavenging all the fuel out.
Put in those medium baffles and instantly rode better and got way more butt dyno tq 2-3k and didn’t want to stall out if ya dropped under 2k when setting off.
He retuned it and was getting like 10lb feet more in that 2-3k range. Now I got 130tq from like 2k .. smooth rise to 140 aroind 4k and stays over 130 til 5500.
I didn’t lose any Hp tho. So gobs more tq under 3500
And no loss of Hp
I’m sure the term back pressure is being used incorrectly.
Thanks for your comment. Sounds like an interesting build.😎 MB
You can’t help a person who swims away from a life preserver.
Truth! lol
Thanks for commenting! MB
I think people just misuse the term back pressure.
That and all the misinformation you can get on the internet. It is easy to find information these days, what isn't easy is knowing if it is good accurate information.
Thanks for commenting! 👍 MB
Awesome infor. I’m the Rinehart guy slimline headpipes & 4” Rinehart slipons with the upgraded baffles & stage 1. so My question is should I remove or keep the baffles in & install the torque cones to gain HP? Tia..
You would see better results by removing the baffles and installing the TTI's
You can see the TTI's at this link - www.dkcustomproducts.com/catalogsearch/result/?q=thunder+torque
However you can leave the baffles in, you just will not get the absolute best performance that way.
Here is a link to choosing the correct size TTI's that you may find helpful- www.dkcustomproducts.com/choosing-the-right-size-thunder-torque-inserts.htm
Please feel free to contact us with any questions;
Support@DKCustomProducts.com
662-252-8828
Thank you for commenting! 👍 MB
So with removing the baffles and installing the TTI. Will I need a retune? Tia
If you have a good tune right now, you will not need to retune if you remove the baffles and install TTI's. KP
Thanks for responding. Will placing an order for the TTI. I believe I will need the 2 5/8” for 4” slip on Rinehart.
Yes, you will need 258 if the opening where you will be installing the TTI is 4 inches.
You can see the 258 TTI's at this link - www.dkcustomproducts.com/thunder-torque-inserts-258-model-family-dk-tti-258.htm
You can see a written report on choosing the correct size TTI at this link - www.dkcustomproducts.com/choosing-the-right-size-thunder-torque-inserts.htm
Please feel free to contact us with any questions;
Support@DKCustomProducts.com
662-252-8828
Thanks for commenting! MB
I personally know reversion is a major issue with these bikes. Took the car out, used NH slip ons (horrible for torque or tuning) The reversion caused popping, killed the low end performance of my bike. I used a Big City Baffle and it completely stopped the popping and gave back to low end torque lost.
Great to hear you got your low end torque back.
You may find the report at the link below really interesting. One of the things it shows is the progression we made from the lollipop design to the patented design of the TTI's. There is more power on the table to get.
www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Also, at the bottom of the above link is an interesting video on decel pop that you may like.
Thank you for commenting! MB
I really don't understand much of this at all, and now I'm wondering if the fishtail exhaust came about when someone was going nuts trying to figure out this back pressure thing, so they smashed the ends of their pipes to see what would happen. I just don't know.
That is because backpressure is bad for power. Backpressure is a power robber. It, literally, makes the engine work just to get the exhaust out.
Additionally, backpressure prevents a full combustion chamber fill in the intake stroke.
The Thunder Torque Inserts utilize a patented design that works 200% - 500% better than lollipops or cones. The unique shape Speeds up Exhaust Gas Velocity, in addition to reducing/eliminating reversion.
Two major keys to power.
www.dkcustomproducts.com/thunder-torque-inserts-c57-337.htm
Here is a written report on exhaust that you may find useful/interesting - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Here is the link to the TTI's if you are interested in reading more about them- www.dkcustomproducts.com/catalogsearch/result/?q=thunder+torque+inserts
Thanks for commenting! MB
Sooo, is having a completely straight pipe ie. no baffles or cats and putting on a TTI the best? Secondly is gutting a stock pipe (removing baffles & cat) and adding TTI. Just as good as getting an aftermarket slip on and adding a TTI?
*side note.. I think that people have been using “back pressure” in the place of reversion. And confused the masses…
It depends on which aftermarket exhaust. The gutted OEM slip-ons supplemented with the TTI are better than most aftermarket slip ons alone... But keep in mind aftermarket slip ons can be equipped with the TTI as well. Reversion is Fresh air and spent exhaust gasses reverting back into the exhaust becoming a detrimental to exhaust scavenging.
I agree with people mis-using the term but I think most are considering "backpressure" as bottle necking the gasses with a baffle.
What you want is an open exhaust that you can see straight through with the TTI installed 1-2 inches into the exhaust. You will get the best performance this way.
Here is a video on choosing the right exhaust that you may find useful - czcams.com/video/H681dl2X_f4/video.html
And here is a LINK to a written report on setting up exhaust for best performance- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Please feel free to contact us with any questions;
support@dkcustomproducts.com
662-252-8828
Thank you for commenting! 😎 MB
Will fishtails stop or slow down the reversion? Or it don’t matter it’s just a smaller hole. I just found you guys Thanks love your videos. Also the longer the pipes the less power ? Correct ?
Fishtails still have reversion. Here is a video that has some fishtails with the Thunder Torque Inserts™ installed that stop the reversion- czcams.com/video/GuIgK-rc2s4/video.html
Link to TTI's with details- www.dkcustomproducts.com/thunder-torque-inserts-c57-337.htm
The longer the pipes, the MORE power...as long as the pipes have no increase in diameter as they get further away from the engine. The best power is to have the same size pipe as the headers, all the way to the back of the bike.
Of course, most folks don't like that look, so they give up a little power to have the larger diameter slip-ons.
KP
So if I remove the cat converter it should be a positive thing?
Removing just the cat will make no perceptible difference in power, at any RPM. You might see 1-3% difference on the dyno, but you are not going to feel it in everyday riding.
Removing the restrictive OEM mufflers (Slip-ons) will make a very significant difference, and is an entirely different subject than the catalytic converter.
Here is a video on how to get the most out of an aftermarket (free-flowing) exhaust- czcams.com/video/pr6z00gL5Yg/video.html
And here is a LINK to a written report on setting up exhaust for best performance- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Thank you for commenting! 😎 MB
Question? I have roadglide with the 107 Vance and Hines slip ons and arlenness intake. Would it be better to delete my cat or take out the packing in the slip ons or both? Don’t want to lose to much power but would like more/better sound.
The packing dampens volume so removing the packing will help with the exhaust note. As will removing the CAT which will also help with felt heat. You can add the TTI's and that will improve performance in your low to mid range torque.
Here is a video on the TTI's that you may find helpful/interesting - czcams.com/video/b2mN7lZ1CLw/video.html
Here is a link to a report on exhaust that you may find helpful as well - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Here is a link to a report on how to choose the correct size TTI's - www.dkcustomproducts.com/choosing-the-right-size-thunder-torque-inserts.htm
Please feel free to contact us with any questions;
Support@DKCustomProducts.com
662-252-8828
Thanks for commenting! 😎 MB
Reminds me of the film "Beverly Hills cop" where he sticks a banana in the cops tailpipe so they can't follow him
LOL 😂😂
It is unfair to use the term, "U can't fix stupid". But sometimes unfairness is applicable.
Don't argue about it, juts put a ThunderTorque insert and wave goodbye after the light.
Glad you like the TTI's! Thank you for commenting and for your business! MB
Is it possible that by adding Thunder Torque Inserts on a slip on exhaust system with the M-8 107 or 114 engine, is it possible of a benefit also of a slip on with medium baffles
Hahaha 😂😂😂I saw that video! Hopefully, since we haven't said anything to offend him and this video is about Backpressure he won't find the need to make a video about us. If he does I believe it would be a positive video because we also do our homework before making parts and deciding to sell them.
Thanks for commenting! MB
Does the stock headpipe crossover on my low rider s help fight reversion?
Yes, crossover pipes help scavenging and will speed up exhaust gas velocity, but still leave a lot of reversion occurring when using free flow slip on's. KP
hey i have a 2016 audi a3 and is a. 2.0L turbo, im planning to to a muffler delete and switch one of the 2 resonators with a vibrant resonators. im a bit lost. is it okay if i go ahead and do that muffler delete and switch the one resonator or is this whole “back pressure” thing gna affect my car in a bad way
I am sorry but we do not do any testing on cars. So we do not have any information for you! You may want to check out a forum or talk to a local shop!
Thanks for commenting! MB
Stock 114 Heritage with street legal screaming Eagle pipes. Will these cones improve performance with this basically stock set up?
The Thunder Torque Inserts™ utilize a patented design that works 200% - 500% better than lollipops or cones. The unique shape Speeds up Exhaust Gas Velocity, in addition to reducing/eliminating reversion.
Two major keys to power.
www.dkcustomproducts.com/thunder-torque-inserts-c57-337.htm
Here is a video with stock exhaust with the TTI's installed (with baffles removed). Will not work with stock pipes with the baffles still in place.
czcams.com/video/cOs1-bTPycU/video.html
Here is a written report on exhaust that you may find useful/interesting - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Here is the link to the TTI's if you are interested in reading more about them- www.dkcustomproducts.com/catalogsearch/result/?q=thunder+torque+inserts
Feel free to email or call with any questions:
Support@DKCustomProducts.com
662-252-8828
Thanks for commenting! MB
I have an 04 carbureted heritage with Screaming Eagle pipes. After installing inserts is it common that the idle needs to be adjusted? It idles lower and sometimes the engine kills.
No, that is not normal. There is nothing about the function of the Thunder Torque Insert™ that would cause a lower idle. In Fact, they should, very slightly, increase the idle on most bikes.
Was there anything else worked on on the bike around the same time as the TTI install?
I would look at an intake leak or exhaust leak first. KP
@@DKCustomProducts thanks for the help. I had taken the exhaust headers off to reconfigure the mufflers and found one bolt on the front header not tightened when I put it back on and it was leaking
Awesome! Glad you found and corrected the problem! MB
So should I leave the baffles in my big radius pipes?
You would see better results by removing the baffles and installing the TTI's
You can see the TTI's at this link - www.dkcustomproducts.com/catalogsearch/result/?q=thunder+torque
However you can leave the baffles in, you just will not get the absolute best performance that way.
Here is a link to choosing the correct size TTI's that you may find helpful- www.dkcustomproducts.com/choosing-the-right-size-thunder-torque-inserts.htm
Please feel free to contact us with any questions;
Support@DKCustomProducts.com
662-252-8828
Thank you for commenting! 👍 MB
Do the TT have any impact on a stage 1 tune?
If you have a good tune for your bike as it sits, and you add TTI's, No retune is needed.
Thank you for commenting! MB
You guys don't understand exhaust design.. What Banks says is about an exhaust system that is 3 to 5 times longer than harley exhaust. It's not the same design. Read Phillip Smiths 1968 book on exhaust design.. What do you think thunder tq inserts do?
We do understand enough that we have a Patent on a design that reduces reversion, speeding up exhaust gas velocity, resulting in a better combustion chamber fill, which results in cooler IAT, more power, and better economy.
Here is another video about a myth regarding exhaust that you may find interesting- czcams.com/video/pr6z00gL5Yg/video.html
Here is a link to a report that explains how TTI's work- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
OK. Trying to walk the knowledge mine field here. I have a 2024 Ford Super Duty ordered with the 7.3L gas. If I cut the exhaust just behind the catalytic converter and turn the tail pipe out the side in front of the rear wheel (like a NASCAR exhaust), wouldn't this increase performance? It's getting the exhaust out quicker. But, if I do this, do I upset the reversion engineering that is designed into the system? If so, can I correct this on my own with a simple "lollipop" baffle? Also, I now am reducing the length of the total exhaust pipe, so is there less of a column of exhaust moving out the exhaust (scavenging)? Also, if I modify the exhaust in this fashion, would it mess with the MAF sensor or ECM in a negative way?
I am sorry we only do testing and have knowledge about Harley's. We will be of no help to you about any car questions or car exhaust questions. You may want to find a forum or youtube channel that is for cars. Thank you for commenting! MB
I have an 02 Dyna with a screaming Eagle Stage 4. When I had 2n2 Big Shots on it and it was bad as all hell let loose. They had the back-pressure thing on them. I got a wild hair stuck in my ass and put on a set of shorties that were one pipe one cylinder. No back pressure provision but I did put in anti-reversion cones. It was like it woke up from a Sunday slumber. I am wondering now if a set of these you’re talking about here in those shorties would get those eyelids up a little more?? I know your discs are designed for the longer pipes but curiosity is calling…?
We have done quite a few tests on torque cones and have never seen any measurable benefit from them.
Here is a video explaining how reversion works that you may find interesting/useful (and it is not just traveling along the outer shell) - czcams.com/video/pr6z00gL5Yg/video.html
The TTI are a universal item that will increase the exhaust gas velocity of any V Twin exhaust system... Long or short
We have dyno charts showing the significant gains of low and midrange torque when using the TTI's. You can see some of them at this link- www.dkcustomproducts.com/thunder-torque-inserts-118-model-family-dk-tti-118.htm
Thank you for commenting! 👍MB
So ,can you clarify a doubt please.
I'm running my Street bob 114
, with out the DB killer's on a Miller exhaust Destiny split-on Euro 5 mufflers.
And after watching your video,my understanding that removing the DB killer's (silencers) ,is actually a good thing for the bike, because reduces or eliminates the backpressure.
I'm i right???!!!
Cheers
It really depends on the exhaust and how restrictive your DB killers are. For a more informed opinion on optimizing your exhaust's performance, please email us a photo looking into the exit of your exhaust and exactly what DB Killers you are using.
Support@DKCustomProducts.com
Here is a written report on exhaust that we've made that you may also find helpful - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Please feel free to reach out to us with any questions.
Support@DKCustomProducts.com
662-252-8828
Thank you for commenting! MB
@@DKCustomProducts
Many thanks,for the fast reply.
Will email you,the exhaust details and hopefully,will not be a problem to run the bike without DB killer's.
Once again
Thanks
Awesome! We will be glad to take a look and help. Thank you for commenting! MB
TTI's .... WORK..... Guaranteed.... 1st hand knowledge.
Glad you are well pleased with the TTI's! Thank you for your business and for commenting! MB
😊 think Bellflowers! 🎉
✌🏽😜
guys I realise you're trying to educate but, instead of focusing on a single part of a "system", why not talk about "the package".
So many shops are publishing dyno graphs that most discussions on this or that are moot.
Now it's easy to predict exactly what your torque curve will look like with:
this cam, that intake, the other exhaust, this big-bore, etc.
It's all available and seems to be repeatable. Cheers.
We do have other videos that talk about more than one subject. Some subjects need to be talked about singularly as it makes it easier to understand!
Here is a video on 4 things to do before changing your exhaust that you may find interesting - czcams.com/video/AE724ChBBLw/video.html
Here is a video on how to choose the right exhaust for your Harley that you may find useful/interesting - czcams.com/video/H681dl2X_f4/video.html
Here is a written report that you may find useful/interesting - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Thank you for commenting! MB
What if you are more concerned with the amount of torque and a longer flatter torque curve than simply a HP number.
Reversion and back pressure kills torque... If you prioritize low-mid range power, those things must be addressed. Beyond 5,252 RPM is when HP is measured at at those RPMs things like reversion, backpressure, and exhaust gas velocity are not as much of an issue.
You can see a written report on Exhaust that you may find useful/interesting at this link - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Thank you for commenting! 😎 MB
@@DKCustomProducts I was just curious. I do a lot of off roading and my machine has a V-Twin. I've seen on Dyno where they lose low and mid range torque but read higher HP with a more open exhaust, but just because the HP and TQ is higher the range moves to high to utilize your low end, and with more low and mid range (more broad tq range with a more tame exhaust. Kinda like a Harley. I'll be sure to read the article as well. Thank you.
I think you will gain a lot of understanding from the report above. Thank you for commenting! MB
@@DKCustomProducts I get what the article says. I forgot to type a line or so. More the difference between shorter true dual drag pipes vs 2 into 1 exhaust difference in braid low and high end torque of the 2 into 1 than the drag pipes which have more TQ and HP but at a more concentrated higher rpm. The 2 into 1 still has decent high rpm power as well. Is that because of the scavenging effect? That's what I run is a custom 2 into 1 on mine.
Yes, a good 2-1 pipe will have better scavenging, which is good for power thru out the RPM band, including high RPM.
2-1 exhaust still has a reversion challenge and will benefit in the low and mid range from the TTI's.
Thanks for commenting! KP
So what yall are saying is back pressure is like high blood pressure?
Or something to that nature! lol
Thanks for commenting! MB
So if you take out the catalytic converter you should get better power
Removing the cat will make no perceptible difference in power, at any RPM. You might see 1-3% difference on the dyno, but you are not going to feel it in everyday riding.
Removing the restrictive OEM mufflers (Slip-ons) will make a very significant difference, and is an entirely different subject than the catalytic converter.
Here is a video on how to get the most out of an aftermarket (free-flowing) exhaust- czcams.com/video/pr6z00gL5Yg/video.html
And here is a LINK to a written report on setting up exhaust for best performance- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Thank you for commenting! MB
Duane looks stoned in this one. He and Kevin are still making plenty of sense though.
LOL not sure why you think he looks stoned, but glad you like the video! MB
Don't understand those who can't get it...
There will always be some, no matter the topic.
There is so much misinformation out there. Sometimes people get their information from someone that believes they understand backpressure when they really do not!
Thanks for commenting! 😎 MB
U guys seem to be having a hard time finding a reason against back pressure…it all depends on the tuning of an exhaust system and seems u just want to increase your business
Hi Dave, thanks for the comment. Please elaborate on "it all depends on tuning" -DS
@@DKCustomProducts seems like I answered it already…
@@davemeshamsr6000 Ah ok, Thanks again for the comment and thanks for watching -DS
I think this video has a few problems. (1) you have an "i told you so" type message with no data, (2) you refer to an "expert" with no data from him either (in this video) (3) you say you did tests but don't show the data (watch that other video?) and (4) do you have independent review of your data assuming you have data? It would be nice if instead of talking at us, you took a more analytical approach with independently verified results/tests, would go further. This guy is an "expert" czcams.com/video/jjPeP_Nn2B4/video.html and so is this guy: czcams.com/video/DvMBbojZpII/video.html , this last guy designs racing exhausts. With all these experts and no interpedently verifiable data, what could you possible expect?
Those are some really good video links you posted. Thank you.
In some of our other videos we have some clips from Engineering explained. 👍
Thanks for your advice on making videos.
Most engine guys know Banks Power and Gale Banks, and if not, they are easily found with a google search.
We cannot put everything in one video....but we have many videos with data and dyno charts and then you can look at the hundreds, if not thousands of comments by Customers using the TTI's with very happy results, hundreds on our website and thousands more of forums.
NO, we cannot put all that in one video....it would simply be too long. That is why we reference the data/other videos with links.
KP