sluggish with exhaust

[mauibuilt59]

I installed a high flow cat, straight thru resonator, and straight thru muffler (magnaflow) with 2.25" piping on my V6 Camry. I also installed an aftermarket intake filter. After all the installs my car seems SLUGGISH, not to mention being too loud for my taste. I was wondering what I could do to next to bring back some lower end pep, and also quiet down the exhaust noise a bit.

thanks for your input

[Luckynumber5]

get a better resonator for one, try one of these


they are supposed to be pretty nice at quieting things down withought hurting performance, as for being sluggish the stock piping ius 2.5'' man you said youput 2.25 on there, that may be why

you loose low end when you loose backpressure, try resetting the ecu maybe that will help (unplug neg battery terminal and turn on lights or something for a few minutes)

[terrastrife]

he still has way too much back pressure(stock y pipe choke) if you put a short ram on, take it off and put your standard air box back in.

[Wibbit]

all those things will lose you a bit of low end toruqe for a bit of high end power.
i have a similar setup (stock piping is 2.25" in my V6 and i believe is 2" in an i4) but i also think its partially psychological because with the louder exhaust it sounds like youre tryin harder when youre not.

[Toysrme]

It's 2.25" before and 2.5" after the Y pipe.

The 2.25" restricts down to 1.75" in places as you can see in the first DIY y-pipe thread. (wontonjohnny's)
2.25" is too small. exhaust moves at higher velocity out of it, but it's choking the hell out of the exhaust. 2.5" is perfect. You can run a turbo large enough to blew the motor without any restriction problems, or run an N/A car without loosing exhaust velocity from the pipe being large enough to roll a truck through.
You goofed when you used the 2&1/4" pipe on a v6 man... Bad! What ignorant ass US domestic exhaust shop had you do that? Hell all the DOHC 3.0L Toyota motors put out substantually more HP & torque, across a wider range than domestic v6's. :\

V6's are loud with high flow resonators... That's the price you pay. Be glad you didn't delete them because they sound like total ass without one! Replace the resonator with a more OEM style one. The flow losses will be nearly neglageable, and it'll put the shush to the muffler.


When you have it re-done, have a new Y-pipe amde from the collectors out. 2" -2.25" mandrel bent tubing going to the Y, with used 2.5" from the Y to the muffler.