Best exhaust mod path for a daily driver

[SirBrass]

Originally Posted by FR-Slide

Meh, I ran 93 for the first 5-6000 miles (despite the dealer telling me to run 87) and haven't noticed any tangible difference in MPG or performance since putting in 87. I'm not denying that 93 would be better, but just giving my input. I don't track the car, and rarely run it spiritedly anymore due to most of my driving being highway.

Then go ahead and throw away your warranty by running the wrong fuel. You're only hurting yourself doing that to save a buck or two per tank at most.

[FrsDuke]

You should invest your exhaust budget in premium gas.

[Cjymiller]

Please move to at least 91... its only $2 more on a 10 gallon fill up against 87.

Octane ratings aside, keep an eye out for used, resonated, catback systems on the forums and pick up one there. Since they are literally pipes, it doesn't matter that they're used unless they were in a crash or scraped from being on a dropped car. Quality used exhausts seem to start around $600 and only go down from there. Just grab some fresh gaskets and you're good to go.

[Deathreaper]

FRS is sensitive to anything under 93. Really don't think running 87 is going to be good for the longevity of your car...

If you can't read french here are the results of using different types of gas:

Octane/hp/ft-lb
87/155/136
91/160/138
94/166/140

http://burn-out.ca/en/content/scion-...ne-test%C3%A9s

Aside from that, a used TRD cat back could be interesting.

[SirBrass]

Yeah, I didn't notice how my car didn't like running 91 on stock tune until nelsmar began tuning it & I now can tell that subtle difference where it just seems to run happier.

Stock tune here was intended for 93 with 91 being barely acceptable (and those of us stuck with acn 91, which is worse, really did get shafted).

A good stage 1 protune (not a canned tune) will increase performance slightly, gas efficiency, and simply make your engine run better.

I'm on my phone so if I make mistakes, blame Sportsguy83

[hakkoo]

A tune is definitely not for you if you don't want to put in better gas.
If you want just sound I'd suggest going for a used cat back/ axle back, but from experience any sound mod will hurt your MPG
On a side note, I sold my Evo to get my BRZ because of MPG due to my commute almost doubling, but as a car enthusiast i would never put in 87 in any of my cars, I go even further by staying with Chevron and Shell gas only.

[SirBrass]

Tunes can be used to optimize the engine, not just make more power. That said, this engine with its high CR cannot safely run 87. You will be tripping the IAM and it will be pulling timing hard to reduce knocking.

I'm on my phone so if I make mistakes, blame Sportsguy83

[sshole]

Wants to throw money at car mods.

Can't buy the right gas.

[FR-Slide]

Originally Posted by hakkoo

A tune is definitely not for you if you don't want to put in better gas.
If you want just sound I'd suggest going for a used cat back/ axle back, but from experience any sound mod will hurt your MPG
On a side note, I sold my Evo to get my BRZ because of MPG due to my commute almost doubling, but as a car enthusiast i would never put in 87 in any of my cars, I go even further by staying with Chevron and Shell gas only.

Meh, not that I don't want to, nor can't, just never saw real world improvement for 93 vs 87. Maybe since I'm used to having (lots) more torque, or maybe because I spend most of my rev range in the sub-4k area, I dunno. Given those driving habits, I just don't get to wring the car out much, so I feel like a tune would be "wasted" from the performance aspect. I still use only Shell for all my fill ups, just changed which button I press. MPG stayed the same, power felt the same, and no knock nor crickets, so I didn't really think twice.

Can go back to getting 93, forgot how high the CR in this engine is. Easy fix if it gets people to chill out.

Anyhow, back to the topic at hand, you have a similar reason for why I swapped vehicles, and MPG is relatively important. That was part of why I was leaning towards a diffuser, given the great gains folks are seeing with that in terms of efficiency. I'm assuming you're saying that "sound mods" cost MPG since most people can't keep their foot out of it? Or are you literally saying that opening up the exhaust is costing mileage?

[hakkoo]

Originally Posted by FR-Slide

Anyhow, back to the topic at hand, you have a similar reason for why I swapped vehicles, and MPG is relatively important. That was part of why I was leaning towards a diffuser, given the great gains folks are seeing with that in terms of efficiency. I'm assuming you're saying that "sound mods" cost MPG since most people can't keep their foot out of it? Or are you literally saying that opening up the exhaust is costing mileage?

the footof course

[FR-Slide]

Just making sure

Off to browse the classifieds, I guess... Just need to control the urge of "mod creep" and ending up with a full exhaust system.

[350matt]

if you reduce exhaust back pressure with a louder / free flowing exhaust then you'll typically get more mpg even without a tune

[sshole]

On a serious note, a tune will help you with midrange power as well as top end. Lots of people are reporting that a simple tune can nearly eliminate that torque dip from 3500-4500 rpm. Tune + header will completely get rid of it.

I don't know about you, but most of my time in the BRZ is spent at 3000-4000 rpm and it hurts when I try to pass people on the highway.

[humfrz]

Originally Posted by FR-Slide

...........
Can go back to getting 93, forgot how high the CR in this engine is. Easy fix if it gets people to chill out........

...... ..... your car will like that .....


humfrz