I don't know if it's just me, but after I installed my true duals (HKS version)
My car feels a LOT heavier. I didn't think just changing an exhaust would make a difference. As when I'm driving with a passenger it doesn't affect my handling too much.

I even took out my spare tire in the back to test it out but it was still feeling heavy.

It feels as if its an understeer, then when I try to turn it a bit more (because of understeer) the tail whips out a little (oversteer)
happened in the rain not too long ago and it felt really unsafe.

 

I think it just might be you, If memory serves me correctly the true dual although it may not look is is not heavier than the original exhaust. Someone feel free to correct me but i think it's actually lighter. Also the rain oversteer was most likely just due to traction loss. Were you pushing it to hard for conditions? How good of shape are your tires? Are you on a basic street tire or something meant for dry smooth track surfaces?

 

You as a driver

 

It's not the exhaust that's for sure. You should check your bushings if something has failed in the suspension. Oversteer is lovely once you get used to it.

 

Driver induced oversteer , that is all you will get on a Z without serious mods.

 

The Z is setup to understeer as Nissan didn't want new owners going backasswards into the weeds all the time. Most likely, you either braked hard, shifting weight onto the front wheels and then accelerated, breaking the rear wheels loose. Or, if you accelerated from a stop, or near stop in the rain, it would do the same thing.

Sure, worn tires or bushings (or a broken sway bar link, etc.) can contribute to a "loose" condition, but it's just as likely the way you were driving caused the oversteer.

 

Likely there was a loss of torque somewhere with a "true duals".

The understeer trait is difficult to pinpoint in the rain. There is a possibility that after the front had hydroplaned mildly, they travelled some distance to find area with shallower/less puddle and as you added steering input, the fronts regained or found traction while the rears were in the same puddle that the fronts were in a short moment ago and hydroplaned.

Try again when you can find a traction circle where you can test the car at a controlled pace.

 

When you mean "heavier" is this the opposite of "lighter" in the context I use
when describing when a car has mods,a proper tune etc,oit just feels..."lighter".
If so,your problem may be to the exhaust is not in sync with the car.I mean,have you done other mods like intake ,cats etc without getting the car tuned?Has the car ever been tuned?I'm think'in you got too much exhaust there.Exhaust systems properl done
are not just a bunch of pipes welded together in hopes you'll get postive results.
They are engineered for a specific car.On a Z,you can bolt on a Nismo S-tune
and drive away feeling MORE power(sounds better too).

 

This is absurd sorry

You losing traction in the rain is normal depending on your speed and condition of tires

Adding a slightly heavier part to the car is not going to be noticeable at all

 

Well now that you have a true dual exhaust there is more air flowing. This means that when you turn the exhaust is pushing harder which prevents you from turning as well. I have a single exhaust on the left of my car so I have more under steer one way and the other I have some over steer. Hope this helps!

 

That's what is weird to me. I did NOT induce an oversteer. I was driving the car carefully. There was not enough water on the ground to hydroplane either. I've driven in rain multiple times without a problem.

I just had my stock exhaust put back on. It feels different once again.

Tire treads are 70% kumho tires.

@TimsZee I think that's what's happening. Because the 350z has a non true dual exhaust and its on the left driver side it feels different for me as the balancing of the car is different.

The stock exhaust was half the weight of the true duals. The muffler area had resonators (HKS) one's so it was heavier than a normal true dual with mufflers.


@Waizzz Yea I definitely understand that. So that's why I posted up this thread as I didn't really understand either. But then again I've heard from some z drivers that back weight would cause the car to pull (from gravity) out more cause some oversteer. (more noticeable in rain)

 

Sorry man but i have a feeling this is in your head with the exhaust, however the road is most slippery when it just first starts to rain as it brings all the oils and grime to the surface, heavy rain actually flushes much of that away. So to say not enough water on the ground isn't actually true, it just takes a small bit of rain to make a really slick surface. I have found it quite easy to oversteer the Z in the rain if i wanted to. I can easily see it being done on accident with a bit of weight shift.

 

@TimsZee I think that's what's happening. Because the 350z has a non true dual exhaust and its on the left driver side it feels different for me as the balancing of the car is different.

The stock exhaust was half the weight of the true duals. The muffler area had resonators (HKS) one's so it was heavier than a normal true dual with mufflers.

If you are seriously agreeing with what I just said then all of this is in your head. Your not going to feel a difference in switching exhausts. That's like carrying a 100lbs pack around and taking out a pair of socks And it feels like a 60lbs pack. 350z have under steer. Get some sways stiffen up the front and call it a day

 

Did you disconnect the rear swaybar link when you installed the exhaust? That would give you more understeer than what you were used to. The exhaust itself will have no effect.

 

Stop smoking the wacky tabacky and you should be good.

 

I really hope most of these reponses werent serious. Really HOPE. Nothing causes oversteer unless your adding or subtracting parts from your suspension setup. Your exhaust has no bearing on suspension. You are just a retarded driver, go to the track and learn how to drive your car.