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      10-24-2011, 11:52 PM   #1
xilli
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Cool Custom exhaust valve project featuring Gintani Race!

So to begin, my current exhaust system features a Gintani Race rear section and turner test pipes. I am looking into a project which may give me the best of both worlds in terms of volume / sound, looking for some constructive criticism and feedback from people in the know.

I recently found myself with the dilemma of weighing up my love for the sweet, intoxicating sounds my Gintani makes when i'm approaching the limiter, vs the sharp decline in sexual favors received from my partner immediately after she endures a two hour trip home with my friend Mr. Drone in the cabin with us.

So basically what i'm looking at dioing, is loosely following the design of the current valve based systems. Some of these systems, from what i'm told, block off one outlet in order to push more gas through the alternate outlet and as a result change the gas speeds and resonance in a fashion that can remove drone and make the exhaust quieter. So what i am doing, is attaching a valve to one of the outlets of the Gintani system, and running it on a vacuum or solenoid system the same way the others do.

Now i'm being realisic with my goals, i don't expect it to be like the innotech where the system is more or less quiet with the valve closed. I am also aware the rear muffler design has a large role to play in the system and the Gintani was not designed with this functionality in mind. What i am trying to achieve, is a substantial noise / drone reducion to make the system a lot easier to live with day to day, whilst still being able to enjoy full noise when i feel like it.

Stage one of the project will be a test, i plan to simulate the sound deadening by baffling one side of the mufflers and driving about to get an idea of the sound and volume levels that would be experienced if i was to install the valves. If this is successful, i'll go ahead and get the system done and hopefully be happy with the end result of my endeavor!

Now i am not fully aware of the internal design of the Gintani muffler, or if my idea is viable due to other factors i haven't considered. I am dropping the car into my exhaust specialist next week to do some investigation and get some feedback. If anyone can provide me with some feedback, experience or constructive criticism it would be most appreciated!
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      10-25-2011, 06:21 AM   #2
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I suspect you won't notice much difference
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      10-25-2011, 07:13 AM   #3
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Quote:
Originally Posted by xilli View Post
I recently found myself with the dilemma of weighing up my love for the sweet, intoxicating sounds my Gintani makes when i'm approaching the limiter, vs the sharp decline in sexual favors received from my partner immediately after she endures a two hour trip home with my friend Mr. Drone in the cabin with us.
This is definitely the paragraph of the week
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      10-25-2011, 07:49 AM   #4
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I considered same idea with my gintani. Seems hard to do with a single inlet muffler with dual tips. All noise will go out the other side.
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      11-13-2011, 08:07 PM   #5
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So after a few weeks of trails i have an update. I have completed the first stage, which was to install a blocking plate in the two inner tips (most direct air path) in my current system which contains resonators. After driving around for the whole weekend i'm pleased to report the results are FANTASTIC!

With the plugs in, i would estimate a reduction in overall volume of around 70%, and almost no resonance problems whatsoever at 60km/h in 4th gear and 100 - 110kmh in 6th and 7th gear. I was shocked at just how much better it was considering the muffler setup was not suited to such a project. For those who have a Gintani system, or really any system that has resonance problems, they'll be familiar with the noisy section in the range up to around 2 - 2.3k. I've personally found after you pass that RPM range, and the exhaust flow starts to build towards 3, the resonance almost fades completely with engine noise and a clean exhaust note taking over.

I've found with my design that as soon as you reach the same levels you would expect resonance the system more or less maintains enough pressure to avoid the noisy frequencies, and produces a muffled clean exhaust tone straight away. I won't lie, there is definitely a performance compromise that can be felt, but it was never my goal to have a quiet car that went fast at the same time, simply to have the option to sit on the highway and cruise about relatively unnoticed when required.

I will this week be testing it with just HFC's and no resonators / mufflers whatsoever, and will the principal behind the project remaining exactly the same i do expect to have some more positive results. I will post DB readings and some rolling recordings etc once i have all my information together.

Last edited by xilli; 11-13-2011 at 11:14 PM. Reason: Spelling
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      11-13-2011, 08:30 PM   #6
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you should call up Gintani! I've heard they have done a couple o f valve controlled exhaust set ups for local customers.

and the result is huge!!!
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      11-13-2011, 09:47 PM   #7
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      11-14-2011, 08:45 AM   #8
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Quote:
Originally Posted by Eugene-TAIWAN View Post
you should call up Gintani! I've heard they have done a couple o f valve controlled exhaust set ups for local customers.

and the result is huge!!!
Yes OP. they are coming out soon with valved exhaust. Hang tight.
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      05-30-2012, 11:16 PM   #9
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interesting experiment. nice work! any updates or recordings? Interested to hear where you ended up with this whole thing...
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      06-01-2012, 03:50 AM   #10
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I actually did go through with it and finish the whole project and it worked exactly as i described! I'm not sure how it compares to the genuine ginani valved system but for the money it cost me to do this it was the single best mod i've done.

Cruising in 7th at highway speeds there is literally no drone, you can drive with no music on and it's quite peaceful. The only time you experience a little bit of noise is when you're below 2000rpm in 3rd / 4th but it's pretty well an 80% improvement on standard.

I'll have to meet up with a mate of mine here that has quality recording gear and do a proper comparison of it open and closed for you guys to see.
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      06-01-2012, 11:04 AM   #11
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sounds cool...It would be interesting to hear what you used for the valve and how you actuate it...
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      06-01-2012, 11:46 AM   #12
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Damn. Knowing that i could do this, i would never have traded my eisenmann race for sport. How much was it to do the project? And could you take a picture of the valve? Would you say that when the valve is closed, it sounds like a sport system? Keep us posted with pics n vids! I might need to switch my exhaust again!
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      06-01-2012, 11:52 AM   #13
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for anyone looking to do this on a dual outlet muffler like the gintani a universal silencer works just as well
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      06-01-2012, 12:29 PM   #14
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Quote:
Originally Posted by talontid
for anyone looking to do this on a dual outlet muffler like the gintani a universal silencer works just as well
Whats a universal silencer?
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      06-01-2012, 10:37 PM   #15
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All up the whole thing cost me about $600. The valves to use depend on your outlet tip size, since the Gintani is a dual 3" it's one of the more expensive valve kits. I used the Race Ready valves and the optional wireless remote kit -

http://store.racereadyperformance.co...aust_c_13.html

I'll see if i can get some pictures this arfternoon and put them up
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      06-01-2012, 11:30 PM   #16
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holy cow...that is cool. I just checked the link you provided. Nice work. Looking forward to the pix! interested to see where you installed the valve on the outlet tip...
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      12-06-2012, 11:31 PM   #17
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any updates with pics ? i was considering doing the same to my exhaust
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