deestyle28

iTrader: (3)

Probably a dumb question but couldn't find an answer when doing a search. I have an F sport exhaust on my car for about a year now and I noticed that when I initially accelerate I don't really feel the torque I use to have when my car had a stock exhaust. When my car was stock acceleration wasn't bad but with the exhaust on I feel like I have to gas it a lot more just to get the car going. Is this normal? My mpg went from 25 to 21 from the install probably due to accelerating more.

Feedback greatly appreciated!

smokyis350

iTrader: (21)

Try resetting your ECU or unplug the battery.

Regardless, the IS350 is pretty torqueless too on the low end. I have to step on it pretty hard compared to German cars like 335

knguyenk

Usually an aftermarket exhaust will increase the torque in the middle of the rpm band (for the 2IS), so it's interesting that you are observing these issues. I would double check for leaks in your exhaust and reset your ECU by pulling the negative terminal off the battery for a good 5 - 20 mins like what smoky mentioned. The car will relearn your driving habits and can probably iron out those issues if it's a computer related issue.

Mike_1GO

iTrader: (2)

IS350 does feel a bit torque less down low but above 3000rpm they pull hard

Gville350

iTrader: (10)

N/A vehicles need some back-pressure; it is likely the powerband (with the introduction of larger exhaust piping) moved around some on you. I'll hopefully maintain my lower-end torque after adding my PPE headers here soon. We'll see!

jbone29

iTrader: (2)

I've had my Fsport exhaust on for about three weeks and I was thinking the same thing. Doesn't seem to take off like it did when I had stock exhaust on it. I thought it was just me,haha. I guess I can try resetting the ECU also.

redspencer

iTrader: (1)

Gville350 is correct. I immediately noticed a lack on instant low-end torque when I briefly swapped out my stock exhaust for the drone-heavy M2 exhaust.

I might be the minority here but I feel that the low-end torque of the 2GR-FSE is fantastic for what it is (3.5L V6). The 2GR-FSE with the D4-S is capable of transmitting 90% of its total torque output from as little as 2,000 RPM which is a pretty impressive feat for a naturally aspirated V6 engine (IMHO).

smokyis350

iTrader: (21)

That is hard to believe that the IS350 has ~250 torque at 2k rpm. Feels like it has 50lb-ft of torque at those RPM.

My friend's Corolla that has ~120 torque feels like it has a lot more low end power than the IS350.

jeepandlex

yeah, when you stick a bigger diameter exhaust on a stock car, you'll loose a little seat of the pants feel....the powerband has moved up in rpm. At WOT you'll gain some power.

iRock

iTrader: (12)

I've been driving with it since day one. I had no idea.

getafewliv

I am going to say I can feel the same thing when I put on my Invidia midpipe. I don't think I noticed any difference when I had put on my M2 exhaust though.

Since the Invidia pipe, it feels like when I hit the gas it has to really build the RPMs before it takes off. It's quite annoying, especially after going around corners. It's making me have to use the paddle shifters to keep the car from shifting up.

I have also noticed a decrease in gas mileage, but I figured that could have something to do with driving harder to hear the car growl.

hirsch2is

Pretty much anything that improves airflow will move the torque band higher I've learned. I learned this big time swapping the intake manifold on my e36 and exhaust on an older is

nfordhk

iTrader: (2)

Too big of an exhaust with no back pressure will cause loss of power too.

Hoovey689

iTrader: (16)

I'm just shocked you still have the IS! Heard you talking about different vehicles over the years!

deestyle28

iTrader: (3)

jbone29, let me know if you feel any difference when you reset the ECU! Thanks!