5" exhaust = loss of power? - Dodge Cummins Diesel Forum
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post #1 of 22 (permalink) Old 06-28-2008, 11:24 AM Thread Starter
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5" exhaust = loss of power?

I have an 06 2500 4x4 with the edge juice w attitude, magnaflow 5 inch turbo back exhaust, afe cold air intake stage 2 w pro af. When I first replaced the exhaust, it felt like the truck lost a little low end throttle response. Is this typical of this large of an exhaust? Is there a way to fix this? I have the edge set of 5 and went all the way to 5 on the low fueling to try and overcome the lack of initial throttle response, but it did not feel like it made a difference..........any help any one can offer would be appreciated..........Greg

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post #2 of 22 (permalink) Old 06-28-2008, 12:06 PM
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Originally Posted by redodgeram View Post
I have an 06 2500 4x4 with the edge juice w attitude, magnaflow 5 inch turbo back exhaust, afe cold air intake stage 2 w pro af. When I first replaced the exhaust, it felt like the truck lost a little low end throttle response. Is this typical of this large of an exhaust? Is there a way to fix this? I have the edge set of 5 and went all the way to 5 on the low fueling to try and overcome the lack of initial throttle response, but it did not feel like it made a difference..........any help any one can offer would be appreciated..........Greg
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post #3 of 22 (permalink) Old 06-28-2008, 12:09 PM
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Some people claim to experience some loss in low end power with a 5" exhaust. When I bumped up to a five inch exhaust I did not notice any loss in power but I have a pressure box helping on the bottom end, so maybe that is something you could consider.

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post #4 of 22 (permalink) Old 06-28-2008, 12:11 PM
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i didnt feel any diff on mine either

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post #5 of 22 (permalink) Old 06-28-2008, 01:18 PM
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Our combos are very similar. The addition of a pressure module will definately pick up your bottom end. I have a Striker 2 stacked with my Juice and low end response is excellent. The turbo lights very quickly even at part throttle. The Edge Attitude w/Juice and Striker 2 is an excellent stack. Price is right on the Striker 2 as well!

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post #6 of 22 (permalink) Old 07-01-2008, 07:21 AM
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Yea, i would say if you add a pressure box to your set up, (be careful of your tranny) it should bring you back up to where you want to be. Im going to be adding a 5" to my truck but im sure with my Smarty and 3:73 gears im thinking i wont see a low end power drop. (Shouldnt anyway)

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post #7 of 22 (permalink) Old 07-01-2008, 07:40 AM
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I did notice a slight low end powerr loss also when I added my 5" system. It does't bother me, truck still screams. I may consider the striker stack setup as mentioned.

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post #8 of 22 (permalink) Old 07-21-2008, 11:58 PM
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Well my 5" is on and i actually did notice a bit of a low end power drop. Take in mind i just got my converter, valvebody put in and my Smarty is on #3 with mild TQ management. I going to bump it up to #5 and see what happens. My mid to high range is crazy though.

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post #9 of 22 (permalink) Old 07-22-2008, 12:03 AM
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i did not notice anything except slight drop in egt's and the noise being more throaty'r

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post #10 of 22 (permalink) Old 07-22-2008, 12:19 AM
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My EGT's went down a bit. And i love the sound which is why i went from the 4 to 5. Over all im pleased.

06 Mega Cab 4x4 Laramie Goerend, Dipricol's, aFe Stage II, aFe Bladerunner, HTT SS 62/71/13 with SS Manifold, Flo Pro, EFI'ed by DJ's Diesel
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SOLD: 06 BIG HORN QC 4x4 Cummins 6 Speed SB w/SB DD
SOLD: 04 QCSB SLT 4x4 Cummins 6 Speed w/SB DD
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post #11 of 22 (permalink) Old 07-22-2008, 03:11 AM
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is this a measured loss of low-end power?
because all of the speculation from just seat of the pants feelings really doesnt mean squat except that:
_compared to what your used to feeling_
the addition of the bigger exhaust _feels_ different and the difference is easily speculated away as low end power loss.

A little lesson in biology will remind us that the human body is most adaptable to accomodate a wide range of different living conditions. The entire act of driving exerts g-forces on us from intertia and lateral accel. and decel that we eventually get so used to our minds phase them out as we drive and subconsciously holds are body's still even though we are being tossed about.

holy this is getting long.

the whole point of my story is this: if, with the four inch exhaust, acceleration happened like this
GAS PEDAL - TORQUE CONVERTER STALL - SPOOL TURBO - TAKEOFF
where each moment had its own frame in time so to speak,

your body would than interpret the 5 " exhaust as slower, because it reacts
GAS PEDAL/ TORQUE CONVERTER STALL/ SPOOL/ = TAKEOFF
causing your body to feel the truck reach full acceleration , quicker; with no extra oomph when the turbo comes on because it's already spooled, happening in unison with the fuel being applied and etc.

I learned how not to trust the seat of the pants when fooling around with carbs on my 360 dart.
the edelbrock carb would blow the tires away at 30 mph and slammed you back in the seat when you stepped on it.
my 750 holley with vac secondaries would barely ignite the tires unless you were stopped and seemed like it had 'less' low end grunt
but track times proved the holley was 6 tenths faster just the way they sat.
the reason the dart would blow the tires away with the edel carb was because my foot would go to the floor, the carb would flood the motor and than the motor would catch up, light all the fuel and boom blow the tires away. same reason the holley was faster, the power came on smoothly and cleanly and progressively. felt slower, but our asses are not a dyno

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post #12 of 22 (permalink) Old 07-22-2008, 03:54 AM
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Quote:
Originally Posted by Rocksolidcummins View Post
is this a measured loss of low-end power?
because all of the speculation from just seat of the pants feelings really doesnt mean squat except that:
_compared to what your used to feeling_
the addition of the bigger exhaust _feels_ different and the difference is easily speculated away as low end power loss.

A little lesson in biology will remind us that the human body is most adaptable to accomodate a wide range of different living conditions. The entire act of driving exerts g-forces on us from intertia and lateral accel. and decel that we eventually get so used to our minds phase them out as we drive and subconsciously holds are body's still even though we are being tossed about.

holy this is getting long.

the whole point of my story is this: if, with the four inch exhaust, acceleration happened like this
GAS PEDAL - TORQUE CONVERTER STALL - SPOOL TURBO - TAKEOFF
where each moment had its own frame in time so to speak,

your body would than interpret the 5 " exhaust as slower, because it reacts
GAS PEDAL/ TORQUE CONVERTER STALL/ SPOOL/ = TAKEOFF
causing your body to feel the truck reach full acceleration , quicker; with no extra oomph when the turbo comes on because it's already spooled, happening in unison with the fuel being applied and etc.

I learned how not to trust the seat of the pants when fooling around with carbs on my 360 dart.
the edelbrock carb would blow the tires away at 30 mph and slammed you back in the seat when you stepped on it.
my 750 holley with vac secondaries would barely ignite the tires unless you were stopped and seemed like it had 'less' low end grunt
but track times proved the holley was 6 tenths faster just the way they sat.
the reason the dart would blow the tires away with the edel carb was because my foot would go to the floor, the carb would flood the motor and than the motor would catch up, light all the fuel and boom blow the tires away. same reason the holley was faster, the power came on smoothly and cleanly and progressively. felt slower, but our asses are not a dyno
Yes what he said lol

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