GTR Forum banner

1 - 10 of 10 Posts

·
Registered
Joined
·
459 Posts
Discussion Starter #1
Hi Guys,

Looking to have a full system made up for the car, having noise limit issues.

Seems to be a major price difference between custom 3" and 3.5" systems.

I cant see me going over 600bhp with this car, got to much to focus on in other areas.

Does anyone see 3" as a limitation? Does anyone run one currently?

Cheers,

Al
 

·
Registered
Joined
·
459 Posts
Discussion Starter #3
The car is already [email protected], but thats with standard R32 elbows, trust downpipes & japspeed 3" decat. So even thuough the current exhaust is huge, I shouldnt think reducing to 3" will make any difference with all the restrictions in front of it?
 

·
Registered
Joined
·
9,677 Posts
I would go 3.5" personally. For 3" you get plenty of JDM systems - true 3.5" are little harder to find and most being just too loud.
 

·
Registered
Joined
·
9,677 Posts
The car is already [email protected], but thats with standard R32 elbows, trust downpipes & japspeed 3" decat. So even thuough the current exhaust is huge, I shouldnt think reducing to 3" will make any difference with all the restrictions in front of it?
Your biggest restriction is the stock R32 outlets and I'm sure the japspeed downpiple im probably on the small side. Consider a HKS 70-85mm downpipe.
 

·
Registered
Joined
·
459 Posts
Discussion Starter #6
I'm a little confused by your response mate I must admit.

I'm not trying to unrestrict when I currently have, I'm trying to get a trackday legal system on it. For evenings too. 87.5db drive by.

I've got trust downpipes, not japspeed.
 

·
Registered
Joined
·
272 Posts
For noise Id stick with 3". The 3" silencers are a bit smaller as well, making it easier to add a silencer in the middle section without getting to low to the ground - And you will probably need 2 good silencers for your goal.


As FR said, you can get a lot of good 3" systems for these cars..
 

·
Registered
Joined
·
459 Posts
Discussion Starter #9
front to back? my HKS silent power seems silly diameter.

I'm gonna go ahead with the 3". I need to put money into the chassis over the next few years anyway! :)
 

·
Registered
Joined
·
272 Posts
Actually I think you are right, I took a quick look at RHD japan and it looks like many exhausts are indeed 3.5", so perhaps more then I initially expected have 3.5" on their GTR`s. I still think 3" would work for you, have better ground clearance if that matters and have less noise. But you would gain power with 3.5", so perhaps a better rear silencer on the HKS silent power is an option? The HKS rear silencer is anything but silent (I have used it as a custom silencer on cars before, and it is LOUD).
 
1 - 10 of 10 Posts
Top