Wednesday, June 27, 2018

This device kept the peace in my neighborhood...

As I mentioned in my last post, I am going to take a break about fixing the issues caused by WORX Auto Alarm and instead, talk about a mod I made right after I got the car back.

As long time readers know, my car served as the rig for the Tomei Expreme Ti titanium exhaust.  One nice thing about offering my car was, I became one of the first (if not the first period) to have the commercial product installed on my car.

The exhaust is a masterpiece. And, if I owned my car out in the countryside with the closest neighbor a good kilometer or so away, it would cause no problems.

Unfortunately I live in a Yokohama suburb where I have neighbors to my left, right and across the (Japanese sized narrow) street. This means that every time I start up my GT-R, people notice. It also means that, if the Tomei is unbaffled, the noise is loud enough to wake the neighbors in the early morning or at night.

Clearly, I needed a solution, fast.  Initially, I simply used the bung that came with the Tomei. That, along with the Blitz E-ESC electronic exhaust valve, worked for awhile, until that eventful trip to WORX where somehow that bung came loose and was lost somewhere in Chiba.

So when I got the car back, I managed to park the car with the Blitz valve fully closed, but herein lies the problem. First, the valve is designed to close only when the engine is warmed up. That means that normally, starting from cold results in huge noise (ok, music :).  Second, I have to remember to manually close the valve to override the initial programming, which is probably not good for the engine.  In other words, a bung should be used, with the Blitz valve being a back up when ultra-silent running is needed.  While I could simply re-order the Tomei bung, I recalled a conversation with the guys at Nissan Prince Tokyo Motorsports about a superior product that was available from a third party.

A bit of research and I found this guy. Mr. Suganuma and his company, "SFC" (Suganuma Future Creation) - dumb sounding name, but very nice products, mostly all exhaust related.  I was interested in his "inner silencer" products like this one.



They come in different diameters to fit different aftermarket exhaust tips, and two color choices - the silver as above or anodized black. What's nice is that you can order the component parts separately, so if you lose a part or a part (like the muffling part) gets burnt/worn out, you can bring it back to "like new" condition quickly and inexpensively.

So I placed an order for a black anodized one in 112mm size (product number 117BK), and a few days later...

Cute, I guess? 
 So I unpacked it right away and found a thin steel tube covered by what appeared to be a thick fiberglass or similar sound baffling material. Presumably heat proof too.
The packing material is covered by silver colored paper (to protect during shipping I guess)
Of course, me being me, I have to clean out the inside of the exhaust tip before installing.
As you can see, it's a bit of a snug fit.

But of course, like most things Japanese, quality engineering means it fits perfectly!
Comes with these bits.
And the result? AWESOME! The car still sounds superb, but it's like everything was taken down 30-40%.  Yes of course for track days and Hakone touge runs I will remove, but for around town this is simply perfect.  In fact, it's so good I find myself not using the Blitz E-ESC, and I may end up removing it... we will see...

Ok next post will also be about a non-WORX issue, something I've been tinkering with for the past few years actually... stay tuned!

2 comments:

Anonymous said...

But I miss Worx Related Issues already!! LOL. Just kidding. Nice to see another unique car accessory only found in Japan. Wish me and my family (GTR and Evo included) live there. xD

Simon Moore said...

Nice touch Aki. I have the HKS Hi-Power Silent setup on my ECR33 and use the HKS bung to pass yearly car tests. It really does restricts the power but does quieten it down alot.

Keep up the great work as always!