Prius Exhaust Mods?

An aftermarket exhaust should be an improvement over the current stock one. Not sure if anyone has changed their exhaust here, but, I too, would like to know what it sounds like. The current exhaust sound sounds so econobox-ish.

 

<div class='quotetop'>QUOTE(Presto @ Aug 23 2007, 03:28 PM) [snapback]501238[/snapback]</div>

Sound is a bit louder. Whether it is objectionable or not is a personal decision. Just don't look for hp and ft/lbs. increases from a cat-back on the Prius.

 

I've actually been thinking about it lately also, but havent gotten too serious about it. On my previous cars I've always had the exhaust custom made, never a premade kit. uh, nm, I had the megan kit on my tC. But if I were to put exhaust on the prius, I'd just get it custom made. It would probably be a lot cheaper.
Nice 240 btw. Just out of curiosity, how do you go from rollin vipers & vets to a 240 and a prius?

 

As I've said to various friends when the "ricing" topic has come up,
"what good is the fart-can when the ENGINE isn't running?"
.
_H*

 

lmao

owned.


Oh ya, and not all custom/after market exhaust has to be the $89 fart cans from autozone.

 

<div class='quotetop'>QUOTE(240sxer @ Aug 23 2007, 09:43 PM) [snapback]501401[/snapback]</div>

Out of curiosity, what kind of duty cycle are you running that results in 90% application of the ICE? Exclusively freeway travel? Or????

 

<div class='quotetop'>QUOTE(240sxer @ Aug 23 2007, 06:26 PM) [snapback]501236[/snapback]</div>

Well, tough, you're going to hear from me!

Hopefully it is quiet, very quiet.

I must be old school but any engine with less than eight cylinders <strike>deserves</strike> should be clammed up. Even the four bangers at the speedway sound awful.

It would be hard to believe the engineers of the Prius designed the exhaust to be restrictive enough to affect mileage vs. an after-market free flow exhaust. Even if an after-market exhaust did slightly improve mileage I would imagine the return on investment would be negative with regards to fuel saved over the life to the car. Besides, a used car salesman friend of mine once remarked nearly any item that is not stock on a automobile negatively affects the resale value. Especially with performance related items. The buyer then assumes the car was driven hard throughout its life.

Jeez, nothing like the pissy, whiny, fart can spitting sound of a four cylinder engine under load to get my adrenalin pumping... Ughhh, it's painful to even imagine it on a Prius...

Rick
#4 2006

 

I bicycled past a Lamborghini the other day (yah, he was stuck in traffic and not moving any faster than any one else). His exhaust was not really loud, but OMIGOD the tone. It sounded like 32-ft organ pipes in there. Now if I can make my Prius sound like that, I would upgrade my exhaust. Probably easier to wire some external speakers and patch in a digital sample of the Lam.

 

If I was to get an exhaust tomorrow, I'd get a Tom's exhaust because all the other Tom's stuff is pretty good... plus if you get Tom's then we'd have someone to give us a review of the exhaust note

 

It's a JOKE, son. A JOKE. Get over your tiny little self.
.
_H*

 

i respect hobbit's opinion about what the prius represents, but i also respect 240sx'er feel for speed and therefore lack of in the prius.

looking at sigmaauto i notice some nice exhaust systems that actually IMO look better than stock, even if it looks double it sure doesn't mean you would get double hp (one can dream!!) but hey some do it for the looks, but what I found interesting is the hp/torque gains specified by the maker.

Of course anything sells these days, but if THEY do work i'd get one in a heartbeat, they are not as expensive as I thought, and the ability to sneak by the neighborhood without waking anyone up (EV MODE) is an added perk if you don't want to piss anyone off.

and then when your on the main road, let the engine scream in its efficient power band ... for me anyways!

unfortunately most these claimed gains are in high redline end rpm, which renders that add-on for me a low rpm lover useless

although i must admit, if toyota offered the regular yaris engine (30 + horse) into the touring version of the prius, i bet toyota would have sold more priuses easily. Who the jumbo is doing the marketing? I bet you the mileage figures wouldn't change a bit, look at the Nissan Altima Hybrid for pete's sake and explain that!!! matching the camry hybrid in city but having 20 plus more horsepower! I rather have that 30 plus horsepower ANYDAY because i PERSONALLY will run the engine in its efficient rpm and let HSD shut it off for me or I with my EV mode switch. Kind of werid to offer a more sporty feel to the touring and not offer the echo engine although funny as it sounds toyota themselfs admit when making the racing prius and bolting the echo engine on, they saw no different in mileage. PErsonally I think the 20% in mileage gain is not worth the loss of 30% of extra horsepower espically if we always run the engine in its efficent powerband and not restriciting it to pumping losses.

I in person saw a guy dismantling the wires off MG1 and MG2 and the thing was literally was on a work bench with the engine still attached to it, when I learn the ropes of the trade, I'm going to nab one of those echo engines and show its possible to have the best of both worlds. Unless the Enerdel battery upgrade comes first, then i'll get that first

btw I will pwn j00z in gt5 prologue

 

It's a tiny, econo-box type engine, on steroids and strung out as far as it can comfortably be tweaked. If you want muscle-car sound, supercharge a large small-block V8 and put one-chamber mufflers under it on 3" pipes

 

I don't think so mate. Most modern V8s rev harder and it produces a tiny 57kw from 1.5 litres while the Yaris produces 80kw from the same capacity. Not what I call strung out!

 

Before spending any money on a "free flowing" exhaust, it would be very beneficial to first attempt to measure exhaust backpressure of the stock system using a manometer.

It could be that the stock system is quite adequate!

If you look over at autospeed.com, they have multiple intake/exhaust articles where they accurately measure the before/after restriction of intake/exhaust mods.

If you're looking for performance, this is the proper way to do it so that you can qualify your performance gains.