anyone have a borla true dual on their Z or G? i just installed it yesterday and below 2k rpms it causes a strong resonance.

Is that just the borla being loud when i accelerate from under 2k rpms?

Just gathering opinions from other people with borla.

 

Maybe the car isnt warm enough,, with my EvoTT if the car isnt that warm the exhaust will vibrate a bit under 2K rpms, which causes a loud sound coming from the rear

but when it gets warm enough the sound goes away

 

the exhaust is could be hitting something, cause mine doesn't make any resonance or whatever. but i remember after i installed it. the passenger rear holder of the exhasut would touch the metal part where the ruber holders go

 

i think that might be it.

i lifted the car and moved the exhaust on the passenger rear around a little and didn't hear it at idle once i started the car up.

we'll give it the driving test tomorrow and see if that makes a difference.

 

Check to see if it is hitting the M brace.

 

Ya if you dont have the resonators angeld the right way it will hit the rear chassis brace

 

the resonators have about an inch clearance from the m brace.

it went away for a while today but now it's intermittant.

also, why does it rattle when it's cold? lol. that's just weird because the exhaust shouldn't change much once it is heated.

I'll try to move things around and get more clearance. This slip fit exhaust just doesn't move much so it's a pain.

 

my turbo xs rattles hardcore on something too sometimes.. would like to know wut it is

 

yeah bro, it gets tight after its in place and is a biatch to rotate parts into place. i had to take the the screws of the passenger side flange, and lossen all clamps then try to move the exhaaust into place, mine is still not perfect actually the passenger side tail pipe sticks out a little more than the driver side but as long it doesn't make noise i dont care.

 

ah ya! i also have that passenger side sticking out further. at a glance a person wouldn't notice it, but it's like 1/4-1/2" further out on the passenger side.

pretty gay for 1200$ of exhaust! lol

I'll get it figured out when i do my engine build. I'll have it on the lift and be putting headers/test pipes on so i'll are align all the exhaust better. Working on the ground wasn't very easy.

 

+1

That one go tme when my Nismo was installed. Had to add some washers to the M brace to bring it down and away from the exhaust.

 

how many washers? i already have some space, washers don't sound like a good way of adding more space with a brace that has strain on it.

 

It will be fine. Mines been liek that forever and i've never had an issue. If you have at least 1/4 of an inch already, then it's probably not hitting your M brace. Remember your exhaust shifts with the engine. So it may only touch it when the engine shifts to a certain angle.

Just don't add more washers then is needed to clear your exhaust and you will be fine. The only thing that i could see being a problem is if your car is lowered. Because adding washers to your brace will bring it closer to the ground. And could potentialy catch on something.

 

thanks!

ya mine is lowered so i'm not going to worry about it. I'll check it out and move things around when i do the headers and test pipes. so far everything has enough clearance. Maybe it's a suspension part that only happens when taking off because it's when i take off and the exhaust is between 1500-1700 rpms.