Thread: What did you do to your car today? Vol 2.0

Originally Posted by stealthee

Catback isn't going to improve efficiency.

EDIT: Just for reference I got over 28 mpg with the same mix on a stock catback and I had 3 other people in the car and the trunk was loaded down with 4 days worth of clothes for all 4 of us as well as sleeping bags and pillows.

My stock cat back had holes in the resonator and mufflers which is why I replaced it. It sure did improve the efficiency.
I was down to 18/19 mpg before replacing it.

Originally Posted by stealthee

Catback isn't going to improve efficiency.

EDIT: Just for reference I got over 28 mpg with the same mix on a stock catback and I had 3 other people in the car and the trunk was loaded down with 4 days worth of clothes for all 4 of us as well as sleeping bags and pillows.

My damn na car can't get that.


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A pulse in the front like in the sterring wheel or pedal is very the tall tail sign of a warped rotor. Depending on how bad it is you can still machine the rotor down a little, but the pulse could come back at some point. If it's a pretty good pulsation, then just replace them.

Originally Posted by Rod2003GT

My stock cat back had holes in the resonator and mufflers which is why I replaced it. It sure did improve the efficiency.
I was down to 18/19 mpg before replacing it.

The holes in the catback are not why you were down on fuel efficiency, and the new catback is not why your efficiency is where it is at now.

If the holes were in your downpipe I could agree that they could affect fuel mileage because it could mess up the narrowbands AFR's. The fact that there are no sensors after the downpipe means that all you are going to do is be a little louder with holes in the exhaust.

Originally Posted by theaceofspades

My damn na car can't get that.


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The sad part is there were SEVERAL trips to town for beer before I filled up and calculated the mileage. On just the trip I probably was closer to 30mpg. I also had to follow my uncle and he has no idea of the concept of maintaining speed. If I had been on my own that would have improved the efficiency even more.

I'll sell you mine if you want that better fuel mileage.

I get 26mpg cruise control set at 82 in the 04 with ported lim hv3 plog and reptile tune

Bought a low mileage l26

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Haven't drove it in days

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Picked up a bumper for the GTP.

Stuck this in and went for a spin HOLY CRAP it needed that! I am duly impressed. Laughed SO hard when I mashed the gas that it wasn't funny lol. I gotta be careful around the 3800 virus.

booba tuner.

Boob a tune haha, that's awesome.

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had to bend the Y pipe some to make the d/s muffler tips look more even, it was kicked to the side to much. used a pipe wrench on the pipe, with a 5 foot pipe and heaved on it a few times. and its much better now.

i need to weld one more hanger bracket to the car, the first hanger the way its set up the rubber hanger hits the car frame and you can feel and hear it vibrate, so thats the next order of business.

Originally Posted by Scottydoggs

had to bend the Y pipe some to make the d/s muffler tips look more even, it was kicked to the side to much. used a pipe wrench on the pipe, with a 5 foot pipe and heaved on it a few times. and its much better now.

i need to weld one more hanger bracket to the car, the first hanger the way its set up the rubber hanger hits the car frame and you can feel and hear it vibrate, so thats the next order of business.

Looks good. How you like it so far?

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so far its nice and quiet, the way i like it. its pretty odd not hearing the exhaust anymore. you know, blown out muffler to all new cat back.

Originally Posted by Scottydoggs

so far its nice and quiet, the way i like it. its pretty odd not hearing the exhaust anymore. you know, blown out muffler to all new cat back.

I hear that. Mine gained a little noise out the tail pipes but the cabin is nice and quiet. Wonder if the 2.5" catted ZZP downpipe will sound the same as now.

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Wash and fresh application of Meguires Ultimate Paste Wax for today.

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Dad got the caviler running $30 alt and it's back on the road. Now he has temp sensor woes. He replaced the temp sensor because PO said fans didn't work. New sensor now just pegs the gauge hot rofl. I told him those house brand sensors are doodoo. Least fans kick on with A/c and when unplugged fans come on. Told him warranty it till it works or they give you your money back

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