Anyone elses car feel faster after catback?

djpheer · Mar 25, 2016

I know they don't typically add power, but i swear my car feels more responsive than it ever has been after installing ARH catback the other day. No other mods. Placebo affect or no?

moubayed · Mar 25, 2016

good for you, but most likely a Placebo effect, as you suspect yourself. Small HP changes are usually not noticeable. But off course the "butt" Dyno begs to differ

djpheer · Mar 25, 2016

Yeah, at least I didn't get in and think it felt slower! Which I was kind of worried about by going H pipe instead of X

Silver50Pony · Mar 25, 2016

djpheer said:
Yeah, at least I didn't get in and think it felt slower! Which I was kind of worried about by going H pipe instead of X

You absolutely gained horsepower, these catbacks are the most restrictive catbacks on a performance car . 2 1/2 inch piping to 2 inch in the suitcase resonator back out to 2 1/2 to extremely restrictive mufflers. No placebo effect. Most people are used to catbacks which are not restrictive just quiet and changing for sound which give 2 to 5 hp. Not in our case. World wide sold car and Europeans hate loud in Europe. Heres proof http://www.stangnet.com/mustang-forums/threads/magnaflow-exhaust-for-the-2015-mustang-gt.881264/

fionic · Mar 25, 2016

djpheer said:
Which I was kind of worried about by going H pipe instead of X

sound is the only measurable difference. and clearly h sounds better

djpheer · Mar 25, 2016

Silver50Pony said:
You absolutely gained horsepower, these catbacks are the most restrictive catbacks on a performance car . 2 1/2 inch piping to 2 inch in the suitcase resonator back out to 2 1/2 to extremely restrictive mufflers. No placebo effect. Most people are used to catbacks which are not restrictive just quiet and changing for sound which give 2 to 5 hp. Not in our case. World wide sold car and Europeans hate loud in Europe. Heres proof http://www.stangnet.com/mustang-forums/threads/magnaflow-exhaust-for-the-2015-mustang-gt.881264/

Cool post. Never seen that link before. thanks for sharing. :thumbsup:

2015 Silver GT · Mar 25, 2016

Yes you will gain horsepower from a catback. Also the Easter Bunny will be paying everyone a visit this weekend. If you believe both of those things I have some land in Florida for sale.

Joe 5.0 · Mar 25, 2016

You're definitely experiencing the placebo effect. The sound increase definitely isn't BS though!

Enjoy!

Silver50Pony · Mar 25, 2016

djpheer said:
Cool post. Never seen that link before. thanks for sharing.

Any v8 engine that's making in or around 450 hp mark at the crank will always gain horsepower going from 2 1/2 in piping to 3in , especially these high revving motors which like to breathe. That's not including the fact the resonator chokes the piping to 2in . You can believe whoever you'd like but between the larger pipe fact and that link I sent you its obvious that these cars actually do gain something from a 3in catback.

Killswitch16GT · Mar 25, 2016

I read that these cars gain up to 15 rwhp from a catback on svtp.

fionic · Mar 25, 2016

Killswitch16GT said:
I read that these cars gain up to 15 rwhp from a catback on svtp.

they have dyno runs to prove this?

craigsix · Mar 25, 2016

i felt a difference after my gibson catback. they claimed 30 some horsepower which is bs but the 3inch xpipe with straight through mufflers is way better than stock crap.

Concrete GT · Mar 25, 2016

The gains could be argued away on a dyno as being in the noise because even 2 different dyno runs on the same car will almost never be exactly the same.
I felt like my car popped off at certain mid range rpm's a little quicker than it did with a stock exhaust. I also hear almost everyone on here poo poo the effects of a cai.....yet everyone that I talk to in person says they got a quicker initial throttle response after installing.

VTECSAUCE · Mar 25, 2016

I don't think its a 15 whp over peak but i'm sure there is hp to be gained with catbacks on these cars. Especially combined with other modifications. I find these forums amusing sometimes as it seems everyone is after the end all be all answer to making peak horsepower. 3-4 whp over stock is certainly believable, combined with full bolt ons and/or boost i'm sure there is even more to be had. The main issue is that ppl are looking at peak gains instead of the rest of the powerband. Dyno's certainly paint a good picture but what it doesn't show is how the power is actually put down. Power, sound and weight reduction all comes from a good cat back. Race another bone stock 5.0 with the same options, same skill level and I'm sure there is a slight advantage to the one with an exhaust. The difference is probably slim but its there.

Melekith · Mar 25, 2016

Placebo. Like everyone else after a catback...you're likely giving more throttle to hear the sound. In this manner, you actually are going faster, literally.

Anyone elses car feel faster after catback?

djpheer

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moubayed

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djpheer

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Silver50Pony

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fionic

spaghettios and cheerios

djpheer

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2015 Silver GT

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Joe 5.0

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Silver50Pony

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Killswitch16GT

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fionic

spaghettios and cheerios

craigsix

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Concrete GT

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VTECSAUCE

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Melekith

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