Air Intake Manifold upgrade - at what point is it really needed

[Muskiebri]

Decreasing air intake system pressure drop is always a good idea. But when does the stock air horn become a power bottleneck you can measure on a dyno? I know, it depends. My goal is 600-650 RWHP, daily driver, occasionally towing my boat (4000 lbs) and horse trailer (6000 lbs). I'm at about 510-520 right now with the 2nd Gen swap with SX-E 366 turbo and DRD tuning. I plan to add BDI 1.5 injectors and eventually a stroked CP3 and lift pump, but that's where I HOPE to stop. I know I can easily get above 600 without a better air horn, but could it give me a noticeable (~10+ HP?) bump in power and responsiveness? It's probably a necessity when you're after big power, but that's not me. It's a relatively inexpensive upgrade, but I don't want to throw money away if I'm not going notice it.

As I was looking into this, I found the video and chart below. Banks puts a number of popular intake manifolds on an airflow test bench and turns up the flow rate until there's 10" of water pressure drop across the intake. He records the airflow at that point, and shows how many CFM it flowed above the stock intake manifold at the same pressure drop. Those are the numbers in the chart in the "CFM GAIN" column. Seems like a very legit method, unless they're not telling us something. Interesting chart though (see pic below), which is at about the 10:20 mark in the Banks video. Based on these results and the price, why would people not purchase the Banks? Maybe he's a turd? LOL. Looks like his prices went up since the video was shot. Interested in your thoughts on this as well.

Thanks guys!

My truck details in my signature.

Intake Elbow Shootout.jpg

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[HKBIGDADDYDIESELDAN]

Decreasing air intake system pressure drop is always a good idea. But when does the stock air horn become a power bottleneck you can measure on a dyno? I know, it depends. My goal is 600-650 RWHP, daily driver, occasionally towing my boat (4000 lbs) and horse trailer (6000 lbs). I'm at about 510-520 right now with the 2nd Gen swap with SX-E 366 turbo and DRD tuning. I plan to add BDI 1.5 injectors and eventually a stroked CP3 and lift pump, but that's where I HOPE to stop. I know I can easily get above 600 without a better air horn, but could it give me a noticeable (~10+ HP?) bump in power and responsiveness? It's probably a necessity when you're after big power, but that's not me. It's a relatively inexpensive upgrade, but I don't want to throw money away if I'm not going notice it.

As I was looking into this, I found the video and chart below. Banks puts a number of popular intake manifolds on an airflow test bench and turns up the flow rate until there's 10" of water pressure drop across the intake. He records the airflow at that point, and shows how many CFM it flowed above the stock intake manifold at the same pressure drop. Those are the numbers in the chart in the "CFM GAIN" column. Seems like a very legit method, unless they're not telling us something. Interesting chart though (see pic below), which is at about the 10:20 mark in the Banks video. Based on these results and the price, why would people not purchase the Banks? Maybe he's a turd? LOL. Looks like his prices went up since the video was shot. Interested in your thoughts on this as well.

Thanks guys!

My truck details in my signature.

Intake Elbow Shootout.jpg

Banks is a great BS artist I had Banks on my 2 nd gen 5.9 Cummins they promised all these big horsepower and torque improvements and I got a little improvement with there kit but no where’s near what it should’ve been for the amount of money I paid for it I’ll never buy anything that says Banks on it ever again they are way over priced and over hyped

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[Muskiebri]

I’ll never buy anything that says Banks on it ever again they are way over priced and over hyped

Yuck. Sorry that happened to you. I didn't mean to unearth old nightmares. But thank you for the input! Based on how he criticized the other designs in the video, I was expecting some negative feedback on him.

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[AnOldBiker]

I don't think you unearthed old nightmares with him, just what he thinks and feels after he spent his money and found what many have, you wasted your money. I didn't get their air horn, but did their electronics and paid big bucks to have it professionally installed. Same results, no significant change. That's when I started preaching "when they say up to XX extra horse power ... zero is part of that up to". The bad part is someone has to bite the bullet and spend the money, time and energy to get the actual results. This is what the buyer has to contend with when it comes to any product sold on the market now.

So, if you get 1/2 or better than anyones claims for the product they manufacture and sell .... your a winner !

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[Snow Dodge]

I do not have a 67,I have a 59 with compound turbos when I put that monster ram on I did notice a difference,


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[HKBIGDADDYDIESELDAN]

https://uploads.tapatalk-cdn.com/201...d96383103c.jpg I do not have a 67,I have a 59 with compound turbos when I put that monster ram on I did notice a difference,


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Was the difference worth the money that you paid for it ? If it was you were one of the lucky ones

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[Snow Dodge]

Was the difference worth the money that you paid for it ? If it was you were one of the lucky ones

Yup , I guess I am one of the lucky ones


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[AnOldBiker]

But like it said in the opening title: At what point is it really needed.

I'm still stock in most everything on my truck. It pulls everything I've thrown at it without problems and preforms exceptionally. Do I need more ? No. So when would I, or anyone need more ? It is good to have all the air going to the cylinders and no restriction for the exhaust when running. At what point is it worth spending the money for more than that ? (Outside of wanting more for the heck of it.)

And yes, in the past, I've had cars, trucks and motorcycles that I couldn't do much more in increasing horsepower and torque. Did I need it ? No ... But I sure did want it !

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[DDP]

Like Mr. Jim ( Old Biker ) said, the stock one will be fine as it can move quite a bit of air flow. If and when you have some extra money to spend you can definitely go ahead and buy the intake horn. It will definitely help in moving some air flow. As far as horse power and torque numbers that is needed to do this, there really isn't one. Each truck is a little different and there is no set number that is needed to do this.

I have had some extremely good feedback from shibby engineering horns as well as the gdp ( Glacier Diesel Power ) horns. I had a GDP on my 2012 and i was quite pleased with it when i compared the stock one next to the gdp. Now granted i couldn't tell you how much it helped due to i did everything all at once. When you take the stock one off and place it next to the new one you will see a nice difference in size.

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[Muskiebri]

It will definitely help in moving some air flow. As far as horse power and torque numbers that is needed to do this, there really isn't one. Each truck is a little different and there is no set number that is needed to do this.

I have had some extremely good feedback from shibby engineering horns as well as the gdp ( Glacier Diesel Power ) horns. I had a GDP on my 2012 and i was quite pleased with it when i compared the stock one next to the gdp. Now granted i couldn't tell you how much it helped due to i did everything all at once. When you take the stock one off and place it next to the new one you will see a nice difference in size.

I like data. I plan to dyno test my truck, but not before and after just adding an air intake manifold. I'm guessing someone has done that though. I might call a couple of the chassis dyno shops around me that work with Cummins (my employer) to see what data (in general) they can share with us on this forum. Might be useful.

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