[AnorexicBuddha]

for those of you that have installed a flowmaster 40 series on your nitro i was wondering whether you used the super 40 or 40 series delta muffler? also for those that did install a 40 series did you keep the resonator on or take it off?

 

[Scjon03]

I have the 40 series muffler.... I believe you have to take off the resonator regardless... Sounds good, not loud like a V8 but good enough to know its there...

 

[AnorexicBuddha]

is yours a super 40 or a 40 series delta?

 

[Florida Roadie]

Today I installed the FlowMaster Delta 40, 2 chamber muffler on my 08 R/T..
I decided to leave the resonator in place. I may remove the resonator in the future. For now it has enough GROWL ..I did feel that there was a modest improvement in performance .After I install the Brute Force CAI I may remove the resonator if the Nitro seems to be held back at all.
Florida Roadie .
:Racing:

 

[Waldorf]

Today I installed the FlowMaster Delta 40, 2 chamber muffler on my 08 R/T..
I decided to leave the resonator in place. I may remove the resonator in the future. For now it has enough GROWL ..I did feel that there was a modest improvement in performance .After I install the Brute Force CAI I may remove the resonator if the Nitro seems to be held back at all.
Florida Roadie .
:Racing:

I have the FlowMaster 50 with the AEM Brute Force CAI and my RT has more punch for sure!

 

[Florida Roadie]

I have the FlowMaster 50 with the AEM Brute Force CAI and my RT has more punch for sure!

Waldorf ...What did you do about your resonator ? On or off ?
Roadie ..

 

[medicguy]

where did you go to get it done? regular muffler shop?

 

[Florida Roadie]

Medicguy ..I guess your question was to me ? Or was it Waldorf ? I did my own at a friends auto repair shop. If you have a lift, saws all and a mig welder it's an easy task. Took less than 45 minutes total time. $ 107.00 cost.
Florida Roadie ..

 

[kaleos]

for those of you that have installed a flowmaster 40 series on your nitro i was wondering whether you used the super 40 or 40 series delta muffler? also for those that did install a 40 series did you keep the resonator on or take it off?

i have the flowmaster delta 40 series installed and the resonator removed and i love the growl of the "beast"!!!!!! this is a must do job for all who own a nitro and want a little extra spice, alot more roar and the great feeling of a super power machine.............for a 3.7 liter, v-6!!!!

:Racing:

 

[Waldorf]

Waldorf ...What did you do about your resonator ? On or off ?
Roadie ..

I think the resonator is still on. I had mine done in a shop in NC a few weeks back. They only worked from the muffler back I believe. I'm assuming the resonator is between the muffler and the manifold/headers?

 

[Waldorf]

Medicguy ..I guess your question was to me ? Or was it Waldorf ? I did my own at a friends auto repair shop. If you have a lift, saws all and a mig welder it's an easy task. Took less than 45 minutes total time. $ 107.00 cost.
Florida Roadie ..

Mine cost $200 for the muffler and chromed exhaust tips, and the labour to install it was $139. The Hot Rod Shop in Apex, NC did mine and Dan Goodwin, the owner, also painted the new pipes black so they don't show as much from behind. He did a fantastic job! I highly recommend him to anyone in the NC area or beyond to look him up.

The $107 included pipes, muffler, exhaust tips?

 

[Florida Roadie]

Mine cost $200 for the muffler and chromed exhaust tips, and the labour to install it was $139. The Hot Rod Shop in Apex, NC did mine and Dan Goodwin, the owner, also painted the new pipes black so they don't show as much from behind. He did a fantastic job! I highly recommend him to anyone in the NC area or beyond to look him up.

The $107 included pipes, muffler, exhaust tips?

Waldorf... Your using the words tips and pipes .I assume that you had your Nitro modified to dual exhaust. Mine was a single muffler application. .My muffler alone went for $100 and $7 for the sleeve to marry the old pipe to the new muffler .No tip on mine .I still have the hidden elbow tail pipe.
I think you'll find the resonator behind the muffler .The cat. converter ahead of the muffler .My slant on the dual exhaust is that there is no advantage (reduced back pressure ) to the duals.With two pipes ,one of which has more turns than a trip through Washington D.C. ,is probably more restrictive than a straight single pipe right out the back.If your pipes are painted because they are visible than they have been lowered to accommodate the second pipe. I chose not to go this direction because it reduces the ground clearance .I do a lot of off road,towing a trailer, with my Nitro and want all the clearance i can get .I'll probably get torched for this view but than so be it .
Florida Roadie.

 

[Waldorf]

Waldorf... Your using the words tips and pipes .I assume that you had your Nitro modified to dual exhaust. Mine was a single muffler application. .My muffler alone went for $100 and $7 for the sleeve to marry the old pipe to the new muffler .No tip on mine .I still have the hidden elbow tail pipe.
I think you'll find the resonator behind the muffler .The cat. converter ahead of the muffler .My slant on the dual exhaust is that there is no advantage (reduced back pressure ) to the duals.With two pipes ,one of which has more turns than a trip through Washington D.C. ,is probably more restrictive than a straight single pipe right out the back.If your pipes are painted because they are visible than they have been lowered to accommodate the second pipe. I chose not to go this direction because it reduces the ground clearance .I do a lot of off road,towing a trailer, with my Nitro and want all the clearance i can get .I'll probably get torched for this view but than so be it .
Florida Roadie.

oh I see what you are saying now. Yes, I got the dual exhaust treatment from the muffler back. I suppose this style mod is more for looks and sound than anything else. They don't have headers for the 4.0L engine yet (although I hear they are in development/testing), so I couldn't get the full front to back treatment. The pipes were painted, I suppose, for the exact reason you mentioned. The second pipe needed to be bent around the spare tire and to the other side of the vehicle. No "torching" coming from me, everybody wants something different. I doubt I will be doing much off-roading with my automatic and low profile tires!

 

[KenCary]

Waldorf... Your using the words tips and pipes .I assume that you had your Nitro modified to dual exhaust. Mine was a single muffler application. .My muffler alone went for $100 and $7 for the sleeve to marry the old pipe to the new muffler .No tip on mine .I still have the hidden elbow tail pipe.
I think you'll find the resonator behind the muffler .The cat. converter ahead of the muffler .My slant on the dual exhaust is that there is no advantage (reduced back pressure ) to the duals.With two pipes ,one of which has more turns than a trip through Washington D.C. ,is probably more restrictive than a straight single pipe right out the back.If your pipes are painted because they are visible than they have been lowered to accommodate the second pipe. I chose not to go this direction because it reduces the ground clearance .I do a lot of off road,towing a trailer, with my Nitro and want all the clearance i can get .I'll probably get torched for this view but than so be it .
Florida Roadie.

I have the same set-up as Waldorf and there is no impact on ground clearance as the crossover pipe is higher than the differential. I have taken mind off-road on nasty trails and can attest to this.

We chose dual outlet 21/4" pipes for 2 reasons: 1. better sound (deeper and less interior resonance) 2. looks.

By using dual 2 1/4" pipes, the bends in the drive side pipes don't add much backpressure. Calculate the area of 2 X 2.25 " and you will see that you have lots of area compared to the 2 1/2" of the Nitro pipe coming into the muffler.

Yes you are right that a good single exhaust cat-back probably has about the same backpressure, but they don't have the look and sound that I was after.

I will say that the combo of headers and this exhaust made a dramatic improvment in my 3.7L. I did both at once, so I can't say whiich one made the bigger difference.

 

[Florida Roadie]

I have the same set-up as Waldorf and there is no impact on ground clearance as the crossover pipe is higher than the differential. I have taken mind off-road on nasty trails and can attest to this.

We chose dual outlet 21/4" pipes for 2 reasons: 1. better sound (deeper and less interior resonance) 2. looks.

By using dual 2 1/4" pipes, the bends in the drive side pipes don't add much backpressure. Calculate the area of 2 X 2.25 " and you will see that you have lots of area compared to the 2 1/2" of the Nitro pipe coming into the muffler.

Yes you are right that a good single exhaust cat-back probably has about the same backpressure, but they don't have the look and sound that I was after.

I will say that the combo of headers and this exhaust made a dramatic improvment in my 3.7L. I did both at once, so I can't say which one made the bigger difference.

Ken .the ground Clarence to which I alluded was not in inches ground to pipes. The shocks and rear are actually much lower than the exhaust at that point. I was referring to the pipes that have been lowered to clear the rear bumper to allow for tail pipe extenders /echo cans. My concern was in coming off a step incline and having the pipes drag when the wheels are at the bottom and the pipes have yet to clear the slope. I came very close to this happening recently with the stock pipe tucked up under the rear bumper with the elbow exhaust as is . If I had and echo pipe on it I would have ripped it off. This is why I decided to leave the exhaust alone and not even add a tip.. Not much sense in having duals for looks alone if you can't see them .If there were any measurable reduction in back pressure that would be another story.
Florida Roadie
:Racing:

 

[kaleos]

glad to hear you got you muffler system!!!

Ken .the ground Clarence to which I alluded was not in inches ground to pipes. The shocks and rear are actually much lower than the exhaust at that point. I was referring to the pipes that have been lowered to clear the rear bumper to allow for tail pipe extenders /echo cans. My concern was in coming off a step incline and having the pipes drag when the wheels are at the bottom and the pipes have yet to clear the slope. I came very close to this happening recently with the stock pipe tucked up under the rear bumper with the elbow exhaust as is . If I had and echo pipe on it I would have ripped it off. This is why I decided to leave the exhaust alone and not even add a tip.. Not much sense in having duals for looks alone if you can't see them .If there were any measurable reduction in back pressure that would be another story.
Florida Roadie
:Racing:

hello florida roadie, hope you're enjoying the extra growl from the flowmaster that you got installed. i like my single pipe system also.

still hope that luck has been on your side and you have not run into my "x"!

kaleos in louisiana.............:Racing:

 

[Florida Roadie]

hello florida roadie, hope you're enjoying the extra growl from the flowmaster that you got installed. i like my single pipe system also.

still hope that luck has been on your side and you have not run into my "x"!

kaleos in louisiana.............:Racing:

Hey Bud !! ... Good to see your name on the screen. Yep I decided to go along with your choice and get the 40 Delta. The new 44 just seemed to be a tad more than I wanted to hear. The interior sound penetration with the 44 was more than I wanted to endure on long trips. I still have the resonator on my Nitro .It appears to be a straight through and causes little if any back pressure .I'll have it up on a lift right after the holidays and I'll look a little closer to see it I want it off. I see you did a mod/ upgrade on you shocks ..Have you posted anything here to enlighten us more ?
I'm not worried about seeing your X .It's her seeing me before I eyeball her that worries me !!

Florida Roadie
:Racing:

 

[kaleos]

Hey Bud !! ... Good to see your name on the screen. Yep I decided to go along with your choice and get the 40 Delta. The new 44 just seemed to be a tad more than I wanted to hear. The interior sound penetration with the 44 was more than I wanted to endure on long trips. I still have the resonator on my Nitro .It appears to be a straight through and causes little if any back pressure .I'll have it up on a lift right after the holidays and I'll look a little closer to see it I want it off. I see you did a mod/ upgrade on you shocks ..Have you posted anything here to enlighten us more ?
I'm not worried about seeing your X .It's her seeing me before I eyeball her that worries me !!

Florida Roadie
:Racing:

i guess i missed the part about your resonator still being on. if you do take it off, you will definitely hear a louder difference. it will make you want to floor it more often because of the "rumble". at speeds around 60 mph this noise is not dramatic while cruising but when i speed up to 70 and above then the sound level increases alot. to me it seems that over time the noise has increased, may be just me though. i still would not go back to the factory setup if somebody would put it all back together for me for free. i like it aaaalllllooooottttt!!!

as for the shocks, the rearend of my nitro was hitting bottom on certain spots of the roads that i drive on. i went with the monroe sensa-trac. it seems to have solved the problem for now. i'll probably be changing out the struts in the near future because now that i've changed out the rear shocks, when i drive over a hump, i notice that the front end kind of bounces around more than the rear end does. i bought the shocks at o'reilly auto parts in lake charles, la. the price was in the 40's, each. they didn't have them for the nitro so i asked if they had some for the 2007 jeep liberty, they said yes, so this is what i have on my nitro for now.

good to hear from you again. take care and hope you and your family have a merry christmas!!!!!!!!!!

kaleos, "mcnabb", in louisiana...............:wavey:

 

[Florida Roadie]

i guess i missed the part about your resonator still being on. if you do take it off, you will definitely hear a louder difference. it will make you want to floor it more often because of the "rumble". at speeds around 60 mph this noise is not dramatic while cruising but when i speed up to 70 and above then the sound level increases alot. to me it seems that over time the noise has increased, may be just me though. i still would not go back to the factory setup if somebody would put it all back together for me for free. i like it aaaalllllooooottttt!!!

as for the shocks, the rearend of my nitro was hitting bottom on certain spots of the roads that i drive on. i went with the monroe sensa-trac. it seems to have solved the problem for now. i'll probably be changing out the struts in the near future because now that I've changed out the rear shocks, when i drive over a hump, i notice that the front end kind of bounces around more than the rear end does. i bought the shocks at o'reilly auto parts in lake charles, la. the price was in the 40's, each. they didn't have them for the nitro so i asked if they had some for the 2007 jeep liberty, they said yes, so this is what i have on my nitro for now.

good to hear from you again. take care and hope you and your family have a merry Christmas!!!!!!!!!!

kaleos, "mcnabb", in louisiana...............:wavey:

Thanks for the update Bud. I was aware that you had an issue with your Nitro having weak shocks.But to get back to the Resonator subject . My goal from the git go was performance not sound. I'm still heading in that direction .Immediately after the Holidays I'll be adding a CAI ,probably a dry one. I hope to improve the HP by 10-16 horse. The resonator on the nitro seems to be a straight through and probably causes little back pressure .If after I'm complete and see less than an expected improvement I'll do the resonator. I'm concerned with interior noise .I pull a trailer long distance 8- 10 times per year and under a load I think the Noise would drive me bananas .With electric / fuel cell cars coming ,cool sounds will be a thing of the past like fender skirts. We'll be playing desired muffler/ dual sounds through the radio.Those struts your looking for are around here somewhere .I think they have been beefed up to 5/8 ".. Check around here and I'll think you'll find them .Please keep me up to speed with the overall handling since the shocks change .I'm certain there's a lot of folks here that can use your input.
Thanks and a Merry Christmas to you and yours .Any guy who puts a step on his Nitro just to make things easier for his Mom can't be all bad .

Florida Roadie
:Racing:

 

[KenCary]

Ken .the ground Clarence to which I alluded was not in inches ground to pipes. The shocks and rear are actually much lower than the exhaust at that point. I was referring to the pipes that have been lowered to clear the rear bumper to allow for tail pipe extenders /echo cans. My concern was in coming off a step incline and having the pipes drag when the wheels are at the bottom and the pipes have yet to clear the slope. I came very close to this happening recently with the stock pipe tucked up under the rear bumper with the elbow exhaust as is . If I had and echo pipe on it I would have ripped it off. This is why I decided to leave the exhaust alone and not even add a tip.. Not much sense in having duals for looks alone if you can't see them .If there were any measurable reduction in back pressure that would be another story.
Florida Roadie
:Racing:

I am one of the few nuts that takes my Nitro off road, but before buying, I carefully studied it.

The departure angle on the Nitro is actually pretty good, so the extra inch or so of my tips is not as big a deal as the front air dam.

My pipes hang about the same height as the stock Nitro, and acutally a little higher than the bottom of the resonator that I ditched. For me the first thing that hits on departure is my trailer receiver, not the pipes. Of course if you don't have a trailer hitch, you would gain a little departure angle.

Let's face facts, the Nitro is marginal in ground clearance, If you want to make a real improvement, you'll need to lift it and ditch the front air-dam.

Ken