[dodgemahal]

My understanding is that some BP is purposely engineered into exhaust systems because those BP 'pulses' that travel in waves back to the combustion chambers (and the low pressure areas that follow them) help to scavenge the combustion chambers, leading to a better intake charge in the next cycle. Sorry to perpetuate the myth.

 

[15R/T]

so wouldn't removing the resonators increase the velocity of the exhaust gases? even if just a minimal amount, since you would be removing a part of the exhaust system that creates a restriction in flow. im not talking about making more power because if your not doing headers & a tune then were talking about +/- 5-10 hp. I just removed mine for the sound, any benefit in power is just a bonus!

 

[StSimeon]

Back when I had my GTO this was a big discussion on the boards and people insisted that back pressure was necessary for power. I said "Great Then I'm going to stuff potatoes in the end of my exhaust and get mad power" lol

 

[FDHog]

I get a lot of back pressure after a few beers but my GF thinks it's more like a free flow exhaust.

 

[movnviol]

I did the resonator delete with new mufflers (Flow Master copies) and then had a dyno done. The car (5.7)came out with 375 hp . So there was no increase in HP. Does sound alot better !! Guy told me to do a tune and I will see probably up to 50 HP more with the right tune.

 

[FDHog]

I did the resonator delete with new mufflers (Flow Master copies) and then had a dyno done. The car (5.7)came out with 375 hp . So there was no increase in HP. Does sound alot better !! Guy told me to do a tune and I will see probably up to 50 HP more with the right tune.

50hp might be pushing it, but you're gonna get a gain in torque with a tune, which is what you're gonna feel in the seat of your pants.

 

[Bad daytona]

I did the resonator delete with new mufflers (Flow Master copies) and then had a dyno done. The car (5.7)came out with 375 hp . So there was no increase in HP. Does sound alot better !! Guy told me to do a tune and I will see probably up to 50 HP more with the right tune.

If you had 375 at the rear wheels then you did gain HP?

 

[blackout91]

Well, with experience with my 13 RT (straight pipes, no muffler, no resonator, cai, cai spacer, ported throttle body, diablo tune) and a 15 RT (stock exhaust, cai). When we pulled up, he definetly pulled ahead for fora second until I started going through RPMs. Did 4 pulls and got him every time, but the same beginning result.

 

["Charlene"]

Well, with experience with my 13 RT (straight pipes, no muffler, no resonator, cai, cai spacer, ported throttle body, diablo tune) and a 15 RT (stock exhaust, cai). When we pulled up, he definetly pulled ahead for fora second until I started going through RPMs. Did 4 pulls and got him every time, but the same beginning result.

Notice the mod list. The mods that allowed you to pull ahead was the ported throttle body with the tune. straight pipes/no muffler and CAI's don't add anything.

So basically ported throttle body + tune car vs a stock car. Of course you're going to pull ahead every time.

 

[Kevin67]

My 1980 Cutlass had a wormed over 307 with intake, cam, headers full duel exhaust 2 1/4" with no cats, ran a 16.2 at the tack. I needed to put cats on the car because the police were handing out huge fines at the time, so I added 2.5" exhaust with cats and good mufflers. Tail pipes were still on order but I took it to the track with out them and ran 15.6 Once I had added the tail pipes I took it to the track the final time it was running 15.2 and that was in the hottest month of August. I thought that with adding the cats it would slow me down, so I was surprised when I was going faster with cats.

 

[dg166320]

there is a picture of the factory resonator cut open.if i saw that before i purchased my cat-back i would have never bought it.it is not what it appears to be

 

[Blue Diamond 392]

I have actually see race on the street 2 identical chargers rt same year 2013 one bone stock one with straight pipe no mufflers no resonators , the stock charger pull ahead 4 out of 4 times.

No car runs identically the same maybe for some reason that charger had a better running motor

 

[SFCR]

I put on some super 40s. I listened to it with the resonators on and I didnt notice a difference so I deleted the resonators. Sounds pretty good. Big question. Does this give you more horsepower deleting and adding new mufflers?

Unless you intend to tune it, nope..