3" Cutout Enough?
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arthursc2 (01-23-2020)
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Cant have your cake and eat it too if youre that worried/annoyed with noise. Either loud and more hp, or decently quiet and forget about the slight hp loss.
just a guess but youre probably only losing 10-20hp thru full exhuast as long as that muffler isnt super baffled, and 5-10hp with cutout open imo which most people cant even tell the difference. You dont mention cats and thats the real hp killer.
get a full 4” diesel exhaust from the first y back and leave the cutout off, win win less to mess with.. my 2cents
just a guess but youre probably only losing 10-20hp thru full exhuast as long as that muffler isnt super baffled, and 5-10hp with cutout open imo which most people cant even tell the difference. You dont mention cats and thats the real hp killer.
get a full 4” diesel exhaust from the first y back and leave the cutout off, win win less to mess with.. my 2cents
I've been a Microsoft Paint Specialist for over a decade now. I can draw custom exhaust, cages, sunsets and happy little forest scenes. PM me for qoutes
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grocerygetter (03-25-2020)
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Here is a master piece showing my final rendition. All parts needed add up to just under $700 and then of course labor will probably double that. I could save some money and buy cheaper V bands but I've had good luck with Vibrant in the past and reviews on the cheaper brands seem hit or miss.
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grocerygetter (03-25-2020)
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I honestly don't see the reason to step up to 4" for just the cutout. Its not really gonna give you anything extra if you are already 3" piping up to that point. Why not put a 3" cutout after each resonator? Seems like a lot of extra if you already have 3" exhaust.
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In my current setup the dual 3" comes to a single 3" resonator and then the cutout. So the main change is going from a 3" merge with a resonator as the bottle neck to a wide open 4". I do believe that trying to force everything through a single 3" resonator is a restriction to some extent. Also I feel the 4" cutout might give a deeper sound and I need to buy a 3" cutout for another project so that would save me money on that project.
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I found my "Big Honkey" in Dallas at some exhaust shop who's name I cant remember. I believe he said it was a take off of a newer Ram 2500 with a gas motor. It takes up the entire area where the spare tire carrier used to be. But its silent as a mouse and has taken some serious abuse over the last 2 years without blowing out. Its probably extremely restrictive. Ill get a pic of it this evening.
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I honestly don't see the reason to step up to 4" for just the cutout. Its not really gonna give you anything extra if you are already 3" piping up to that point. Why not put a 3" cutout after each resonator? Seems like a lot of extra if you already have 3" exhaust.
So dual 3" to single 3" changing to dual 3" in single 4" out.
Dual 3" into single 3" is basically just running a single 3" and killing the point of having 3" collectors on the headers if you're gonna slam both of them into one 3" pipe. And even with 400 rwhp you'll see a gain going dual 3" or single 4" over single 3".
He's got a heads, cam, supercharged 6.0 if I recall correctly without going back and looking. That's gonna see a gain.
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dantheman1540 (01-23-2020)
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He's going from dual 3" header collectors to a single 3" pipe that he has right now, to a dual 3" inlet Y pipe merge with 4" inch
So dual 3" to single 3" changing to dual 3" in single 4" out.
Dual 3" into single 3" is basically just running a single 3" and killing the point of having 3" collectors on the headers if you're gonna slam both of them into one 3" pipe. And even with 400 rwhp you'll see a gain going dual 3" or single 4" over single 3".
He's got a heads, cam, supercharged 6.0 if I recall correctly without going back and looking. That's gonna see a gain.
So dual 3" to single 3" changing to dual 3" in single 4" out.
Dual 3" into single 3" is basically just running a single 3" and killing the point of having 3" collectors on the headers if you're gonna slam both of them into one 3" pipe. And even with 400 rwhp you'll see a gain going dual 3" or single 4" over single 3".
He's got a heads, cam, supercharged 6.0 if I recall correctly without going back and looking. That's gonna see a gain.
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Most 3" merge pipes are designed pretty poorly
They have gotten better but few are designed as well as the flow master in this pic. ANYTHING that helps air flow smoothly and keep velocity helps.
This is a well designed 3" merge, but compare it to the flowmaster
Add on top of that its going from dual 3 to single 3, to a dual 3 to single 4 and it's going to help out quite a bit
This is a flowmaster dual 3 to single 4
They have gotten better but few are designed as well as the flow master in this pic. ANYTHING that helps air flow smoothly and keep velocity helps.
This is a well designed 3" merge, but compare it to the flowmaster
Add on top of that its going from dual 3 to single 3, to a dual 3 to single 4 and it's going to help out quite a bit
This is a flowmaster dual 3 to single 4