Jump to content
SAU Community

Er34 Gtt Nismo Muffler And Impul Ecu

O_Sotiris

By O_Sotiris,
in Engines & Forced Induction

 Share

Recommended Posts

O_Sotiris Enthusiast

O_Sotiris

Posted
Posted (edited)

Hi all,

At the moment my car has few mods being as follows:

1. blitz return flow cooler

2. K&N drop in panel filter

3. Excedy HD clutch

4. boosted 1 bar

It also came with an Impul tuned ECU and Nismo VSS muffler.

After searching for what type of exhaust I will need etc, I have decided to change the exhaust system to a 3". However, I want to keep the Nismo muffler, and change the dump/front/cat-back (if that can be done with the VSS).

Does anyone know if the VSS muffler (silent/sports mode) is particularly restrictive? Or whether it would even matter as its at the end of the exhaust?

If people dont know the muffler i'm talking about it can be found here:

http://www.skylinesa..._1#entry5322488

and here:

http://www.skylinesa..._1#entry2851890

Also, once I have changed the exhaust the car will most likely need a tune. Does anyone know if the Impul chip can be tuned? I am pretty sure the car came with both the chip and muffler from factory.

Thanks for your help in advance.

Edited by O_Sotiris
GTXR34 Experienced

GTXR34

Posted
Posted

r u after the sotck look or the just the adjustable valve? if u dnt care abt loosin the stock look jsut get a varex cannon with the adjustable valve or if u want the stock look just take it to an exhaust shop and they will make an adapter for the tip..

i personaly rekon it will be a restrictive due to the 2.5" inlet.. u could get a twin varex tip to look similar aswell.. and even rewire it to the vss switch or just use the remote provided.. the varex is exactly the same system as the nismo one.. hope that helps

Cheers

Herb

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Better off with a legal exhaust than one that is illegal (valve based) given you are in Vic.

There are a few 3inch items that do pass EPA for when you get pinned.

You will need a prope tune as well. I feel sorry for your car being forced with that boost on a shit stock dia exhaust, can't be good at all.

GTScotT Grand Master

GTScotT

Posted
Posted

I actually feel the jap tuned ECU's can be quite good and wouldnt go as far as to say 'need a proper tune'.

The jap ones are normally done around factory based cars with typical mods such as exhaust cooler and boost. But I am a firm believer you should always run them up on the dyno to make sure they are doing what they hope they are.

The variance in fuel between the two countries CAN throw them off completely and leave you detonating the shit out of your motor. No guarantees unless you get it checked!

whitneybra Enthusiast

whitneybra

Posted
Posted

Hi im currently running the same nismo vss muffler at the end of a 3 inch pipe with the valve removed.

I have a 3071r with AVO rear housing. plus supporting mods and im achiving 274hp at wheels on 9 psi.

Im yet to turn the boost up.

O_Sotiris Enthusiast

O_Sotiris

Posted
  • Author
Posted

Thanks for the help/opinions guys.

@GTXR34 & R31NISMOID

I like the idea that the car came from factory with the Nismo muffler and the switch in the cabin is a good talking point! Obviously though if it is doing damage i'm not keeping it on. To tell you the truth I never realised it was only a Nismo muffler. I actually thought it was the whole exhaust which is why I haven't upgraded it.

You will need a prope tune as well. I feel sorry for your car being forced with that boost on a shit stock dia exhaust, can't be good at all.

Can the smaller exhaust really be doing doing damage? Will too much backpressure wreck the turbo?

I'm only asking because the car came like that from Japan. Only modifications I have made are the cooler/intake/clutch.

I actually feel the jap tuned ECU's can be quite good and wouldnt go as far as to say 'need a proper tune'.

The car hasn't detonated in the time (almost 2 years) I have had it. It's actually been running a little bit rich, even with the modifications.

Hi im currently running the same nismo vss muffler at the end of a 3 inch pipe with the valve removed.

Do you need some sort of adapter to go from 3" to 2.5" at the muffler?

whitneybra Enthusiast

whitneybra

Posted
Posted

I made the whole exhaust myself and did a 3 inch to twin 2.25 to use both imput hole in the muffler.

It was a bit of stuffing round but hasnt hurt the power at this low boost i will find out if it does when i get a final tune done.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

I think you'll find the impul ecu cannot be tuned but you may be able to replace the chip - ask someone like Toshi - he may be able to do it but you really want it done in your car not by mail.

But if you can stick it on a dyno after you have made the changes - if you're lucky and afrs and timing are acceptable you won't need a retune at this point.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      One of these is not like the others 😂

      By GTSBoy · Posted

      You are perhaps suggesting that it is not a super car? Well....it's not an AU.
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Dropped the MX5 of this morning to get the hardtop colour matched and some PDR done, they are also going to give it a buff to remove some "stubborn" swirl marks and light scratches in the clear coat Over the last few months the poor little thing has copped some shopping centre car park abuse, I try to not park in them, but hitting Westfield's a few times over the last few months has taken its toll, nothing really bad, but enough of a trigger for a "while we're in there" thingie  Once it's back and all the one colour, with a few dents and mark's removed I'll give some of these products a go and see what they're like  
    • PranK
      One of these is not like the others 😂

      By PranK · Posted

    • V35_Paul
      Rv37 400r questions

      By V35_Paul · Posted

      A locally delivered Infiniti have remote start installed but don't come with the remote start key. You need a new remote start key and they just need it programed. And this is different to making/programing a new key that just starts the car.  
    • Lithium
      Shoota's R33 GT-R RB30/26

      By Lithium · Posted

      Cheers, and cheers for sharing so much of the build and also sharing the glimpse of what turns out to bring a lot of us poor decision makers together haha.  I do recommend learning more about how to manage it, if not considering getting a  formal diagnosis.  The discussion with the psychiatrist I got my diagnosis through was quite eye opening, things I'd not even considered to be ADHD related and hadn't mentioned were things she asked about out of the blue and were common themes with people with my flavour of ADHD.   It's not a label for people who are hyperactive and ill-attentive, there's more to it than that and some of it can be much more challenging or damaging - though there are of course two sides to the thing, and a lot of the stuff we have to go through and work on to live with it make us effectively "better" at other things as well. Aside from the fact that there is some argument I could have a bit of ASD seasoning in there (came up during the diagnosis, and neurodiverse things seem to not stay as a cookie cut) I suspect you need to learn more about ADHD if you are puzzled about how hyperfocus could possibly apply.  I *do* personally use "superpower" with quotes deliberately, but it's 100% an ADHD thing due to the exact reason that lack of focus is also an ADHD thing... Loosely speaking the inattentive side of ADHD isn't the inability to focus, it's the inability to control where the focus goes.  Not being able to sleep because brain is more interested in thinking about a stupid thing I said to a girl I liked 30 years ago, not being able to focus on work because my brain is more keen on putting together the torque management strategy we're going to try out with a drag car next weekend, not being able to focus on a conversation with someone I WANT to listen to and respect because there is a flickering light in my peripheral vision.    If I could just stop work and build the torque management setup right there and then I'd not hear anything else until it was done.  
×
×
  • Create New...