Some good Exhaust system ideas
04-23-2014, 05:58 AM
#11
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Yes I'm sure.
'Freeing up' pipe diameter actually reduces exhaust gas velocity, which reduces cylinder scavenging, which in turn reduces part-throttle torque. These 3-ton bricks NEED all the low-end grunt they can get, not peak HP.
And the cats on yer truck already outflow the needs of yer stock engine quite handily - replacing (or removing) them buys you nothing but a slight change in tone / volume. They are NOT 'limiting power a lot'. They are not limiting it at all.
A catback is a waste of money. As mentioned in a previous post, just drop in a replacment muffler of yer choice (Borla ProXS or XR-1 are both very good), be happy with the new noises you created, and move on. Don't drink the marketing BS Koolaid - neither for an exhaust nor a CAI.
Now - IF you wanted to spend north of $2K then yes, a specific exhaust architecture: Dynatech longtubes, 2 hiflows, an X-pipe and a pair of unchambered straight - through mufflers, with all mandrel-bent stainless tubing (2.25" for best grunt fer towing, 2.5" for best all-round perf), AND a custom tune to correct for the change in oxygen transport delay incurred by the O2 relocation, alter VCT operation for breathing, etc, etc - this config will easily net you 30/30+ HP/TQ attributable to the exhaust, AND much more 'area under the curve' improvements. And sound and look fantastic.
This is on a 5.4L 3V.
MGD
'Freeing up' pipe diameter actually reduces exhaust gas velocity, which reduces cylinder scavenging, which in turn reduces part-throttle torque. These 3-ton bricks NEED all the low-end grunt they can get, not peak HP.
And the cats on yer truck already outflow the needs of yer stock engine quite handily - replacing (or removing) them buys you nothing but a slight change in tone / volume. They are NOT 'limiting power a lot'. They are not limiting it at all.
A catback is a waste of money. As mentioned in a previous post, just drop in a replacment muffler of yer choice (Borla ProXS or XR-1 are both very good), be happy with the new noises you created, and move on. Don't drink the marketing BS Koolaid - neither for an exhaust nor a CAI.
Now - IF you wanted to spend north of $2K then yes, a specific exhaust architecture: Dynatech longtubes, 2 hiflows, an X-pipe and a pair of unchambered straight - through mufflers, with all mandrel-bent stainless tubing (2.25" for best grunt fer towing, 2.5" for best all-round perf), AND a custom tune to correct for the change in oxygen transport delay incurred by the O2 relocation, alter VCT operation for breathing, etc, etc - this config will easily net you 30/30+ HP/TQ attributable to the exhaust, AND much more 'area under the curve' improvements. And sound and look fantastic.
This is on a 5.4L 3V.
MGD
04-23-2014, 06:24 AM
#13
Senior Member
Cats you don't need necessarily, (of course depending on where you are legally they do) but you do need some restriction. And pipe size diameter is generally pretty accurate from factory. Increasing or decreasing can hurt. Just to clarify lol
04-23-2014, 06:26 AM
#14
Senior Member
04-23-2014, 07:35 AM
#15
For the most part, yes. It's pure marketing hype. And folks get fooled everyday - from exhausts, intakes, oil additives, fuel additives... you name it.
I has this exact discussion with Stage 3 concerning exhaust on a new 5.0 truck They were testing a catback and a programmer. Posted some impressive numbers too. When I challenged it, they fully admitted that the gains were almost all from the programming.
The 5.0's already have excellent factory systems is the reason why - they need it because that 5.0 flows so well to begin with. Ford did it right - 2.75" pipe, straight-through muffler... Stock. Perfectly matched to that engine.
EB's - totally different animal - breathing mods DO wake that thing up, especially if tuning is also involved.
5.0 and EB input in yer 5.4 3V context thread really does not apply. Yer 5.4 is already set up to maximize /preserve low-end torque. With stock tuning it's not really a revver, and peters out around 5K anyway, and the stock PCM calibrations prevent shifting above 5K in generally, hence making it impossible to even achieve the factory 300 crank HP. Simple exhaust mods ain't gonna do squat.
As I said - drop in a Borla ProXs with the stock 2.5" in/out pipe diameter and enjoy. Bump the midpipe to 3" if you wish as a 'fell good' enhancement. There's a good, knowledgeable feller around here name o' [MENTION=177071]DarrenWS6[/MENTION] that will confirm this.
Avoid Fartmaster.
good luck
MGD
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zane269 (05-11-2014)
04-25-2014, 08:04 PM
#17
Senior Member
Hi.
For the most part, yes. It's pure marketing hype. And folks get fooled everyday - from exhausts, intakes, oil additives, fuel additives... you name it.
I has this exact discussion with Stage 3 concerning exhaust on a new 5.0 truck They were testing a catback and a programmer. Posted some impressive numbers too. When I challenged it, they fully admitted that the gains were almost all from the programming.
The 5.0's already have excellent factory systems is the reason why - they need it because that 5.0 flows so well to begin with. Ford did it right - 2.75" pipe, straight-through muffler... Stock. Perfectly matched to that engine.
EB's - totally different animal - breathing mods DO wake that thing up, especially if tuning is also involved.
5.0 and EB input in yer 5.4 3V context thread really does not apply. Yer 5.4 is already set up to maximize /preserve low-end torque. With stock tuning it's not really a revver, and peters out around 5K anyway, and the stock PCM calibrations prevent shifting above 5K in generally, hence making it impossible to even achieve the factory 300 crank HP. Simple exhaust mods ain't gonna do squat.
As I said - drop in a Borla ProXs with the stock 2.5" in/out pipe diameter and enjoy. Bump the midpipe to 3" if you wish as a 'fell good' enhancement. There's a good, knowledgeable feller around here name o' [MENTION=177071]DarrenWS6[/MENTION] that will confirm this.
Avoid Fartmaster.
good luck
MGD
For the most part, yes. It's pure marketing hype. And folks get fooled everyday - from exhausts, intakes, oil additives, fuel additives... you name it.
I has this exact discussion with Stage 3 concerning exhaust on a new 5.0 truck They were testing a catback and a programmer. Posted some impressive numbers too. When I challenged it, they fully admitted that the gains were almost all from the programming.
The 5.0's already have excellent factory systems is the reason why - they need it because that 5.0 flows so well to begin with. Ford did it right - 2.75" pipe, straight-through muffler... Stock. Perfectly matched to that engine.
EB's - totally different animal - breathing mods DO wake that thing up, especially if tuning is also involved.
5.0 and EB input in yer 5.4 3V context thread really does not apply. Yer 5.4 is already set up to maximize /preserve low-end torque. With stock tuning it's not really a revver, and peters out around 5K anyway, and the stock PCM calibrations prevent shifting above 5K in generally, hence making it impossible to even achieve the factory 300 crank HP. Simple exhaust mods ain't gonna do squat.
As I said - drop in a Borla ProXs with the stock 2.5" in/out pipe diameter and enjoy. Bump the midpipe to 3" if you wish as a 'fell good' enhancement. There's a good, knowledgeable feller around here name o' [MENTION=177071]DarrenWS6[/MENTION] that will confirm this.
Avoid Fartmaster.
good luck
MGD
Thanks for the kind words MGD.
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zane269 (05-11-2014)
04-26-2014, 12:19 PM
#18
Actually, catalytic converters are federally mandated. You can not legally remove a functioning cat from any vehicle that was originally equipped with one anywhere in the country.
04-26-2014, 02:36 PM
#19
Senior Member
Said it in the wrong way, meant emissions testing wise, here they don't even visually inspect (supposed to yes, but they could care less in some areas)
05-10-2014, 07:45 AM
#20
I am extremely happy with my Magnaflow. I wasn't after any kind of performance boost, just a nice deep, mellow rumble. That's exactly what I got.
I wasn't interested in having a loud exhaust that could be heard a mile away. I did not want the highway drone that Flowmasters are known for.
I love how my truck sounds now.
Tomster
P.S. Should have stated that I have a 2010 Super Crew Lariat 4x4 with the 5.4L engine.
I wasn't interested in having a loud exhaust that could be heard a mile away. I did not want the highway drone that Flowmasters are known for.
I love how my truck sounds now.
Tomster
P.S. Should have stated that I have a 2010 Super Crew Lariat 4x4 with the 5.4L engine.