tooter's exhaust experiment... - Page 2 - Toyota Yaris Forums

malibuguy · 12-25-2013, 09:00 AM

Wow didn't realize the axle back makes that much of a difference.

I recently switched out my Borla for my old Flowmaster and absolutely love the mid range grunt I got back. But I've never tested it...

tooter · 12-25-2013, 12:23 PM

Quote:

Originally Posted by malibuguy

Wow didn't realize the axle back makes that much of a difference.

I recently switched out my Borla for my old Flowmaster and absolutely love the mid range grunt I got back. But I've never tested it...

That surprised me too, but I don't believe the difference in exhausts is quite that drastic, as the first dyno run was done with summer blend gas while the other was done with winter blend. The fuel definitely accounts for some of that disparity as my mileage always drops off when they switch blends.

Greg

cali yaris · 12-25-2013, 01:02 PM

Still shows that at least that axle-back doesn't LOSE power in the low to midrange. I think that can be safely generalized to any axle-back that flows more freely than the stock exhaust.

tooter · 12-25-2013, 03:22 PM

Quote:

Originally Posted by cali yaris

Still shows that at least that axle-back doesn't LOSE power in the low to midrange. I think that can be safely generalized to any axle-back that flows more freely than the stock exhaust.

Yes. That's a pretty safe assumption to make. It's likely because the rest of the exhaust (specifically the small midpipe) already provides enough flow resistance for decent low end torque.

I also think that the modifications I had made on my intake allowed the engine to take better advantage of the increased flow more than an engine with a stock intake, which would also increase the difference.

Greg

TOLMACH · 12-25-2013, 10:22 PM

I am still confused about the huge difference in the air/fuel ratio (((

tooter · 12-25-2013, 10:57 PM

The sniffer was likely not reading correctly. It wasn't in the best of condition, and there were no other symptoms that anything was out of kilter. The car drove so good with the stock exhaust I didn't even think there would be any difference at all.

Greg

yarisgeo13 · 12-29-2013, 12:53 AM

Nice exhaust. It looks like someone wants to spin the wheels off his/her car..Cool!

tooter · 01-10-2014, 02:03 AM

Quote:

Originally Posted by yarisgeo13

Nice exhaust. It looks like someone wants to spin the wheels off his/her car..Cool!

Thanks, man.

I really like it. The stainless steel resonator tip mellowed it out nicely.

12-25-2013, 09:00 AM	#19
malibuguy Obsessed with 1.5L Drives: '10 PW Yaris Sedan Join Date: Feb 2011 Location: Westminster, MD Posts: 907	Wow didn't realize the axle back makes that much of a difference. I recently switched out my Borla for my old Flowmaster and absolutely love the mid range grunt I got back. But I've never tested it... __________________ -Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr

12-25-2013, 01:02 PM	#21
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	Still shows that at least that axle-back doesn't LOSE power in the low to midrange. I think that can be safely generalized to any axle-back that flows more freely than the stock exhaust. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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12-25-2013, 10:22 PM	#23
TOLMACH Drives: soarer Join Date: Feb 2011 Location: Beautiful British Columbia Posts: 954	I am still confused about the huge difference in the air/fuel ratio (((

12-25-2013, 10:57 PM	#24
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,961	The sniffer was likely not reading correctly. It wasn't in the best of condition, and there were no other symptoms that anything was out of kilter. The car drove so good with the stock exhaust I didn't even think there would be any difference at all. Greg

12-29-2013, 12:53 AM	#25
yarisgeo13 yarisgeo13 View User's Garage Drives: gloss black 5 door Join Date: Sep 2013 Location: North Lauderdale, FL. Posts: 62	Nice exhaust. It looks like someone wants to spin the wheels off his/her car..Cool!