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S3OZ dual exhaust& OS Giken TwinCam 24


Derrick072

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Hi guys and gals.Do you know if any company makes dual exhaust like the old days.Its full dual and the tailpipes are on top of eachother instead of side by side.As a teenager watching dragracing inJapan i heard the sweetest sound of a Z triple carbs and that exhaust combined was the most beautiful sound.Also does anyone have any info about the OS GIKEN twincam 24valve engine L6? This guy way back in the days had one triple carbs 3liter non turbo. And he just stomped on this ToyotaSoarer 6MG with Blitz turbo kit on it.Back then that Soarer was dynoed at 420 rwhp. Too bad they didnt have digital cameras back then.That Z is etched in my mind and was always wondering what kind of horsepower that guy was pushing!

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Back in the 70s there was a twin pipe setup, and MSA now sells it...both pipes go into the same muffler at the end though :cry: and the outlets are stacked on top of each other....looks like a pretty cool exhaust..but I'm going to upgrade to a single 2.25 or 2.5 pipe.

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Derrick,

You're probably referring to the exhaust that is commonly seen on old S30 Zs as pictured in Nostalgic Hero. It's an old Sports Option piece that Trust re-created in the 80s and 90s and has since discontinued. I found mine brand new on eBay and am very happy with it.

-e

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I've had a Trust Dual Exhaust on my S30 since living in Japan. The set I bought in 87 was on a car for many many many years. From what I understand the Trust Exhausts were available around 75, and is more of a copy of the factory 432 exhaust system.

The Nissan Sports Option piece was very similar in design, though it had the megaphones as a slip-on piece that separated at the differential crossmember, while the 432 and the Trust exhausts terminated closer to the middle of the driveshaft.

They are still available in Japan, though you have to look. Many people went to the 75mm and larger Single Exhausts, while still using that original funky header flange (looks like the stock manifold gasket, only much larger).

The normal sizing on the pipes is 50mm.

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Man Im so glad I joined this club!!!!So much good info .Its comforting to Know there are other people who love this great car.Also wanted to know how much does a gallon cost in your areas? Here is $2.37 pgallon.It would be very interesting to know from all around the world! by the way 2.37 is for 89octane the military sells on post here.They say that is the going price in the USA.

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Hey Derrick ,

If you could catch that car with your camera that'd be great to see. Give it a go!

I know it's not quite an S30 but my KGC10 Skyline runs a twin Fujitsubo system from a beautiful set of stainless 6 into 2 extractors. Both the intermediate and main mufflers have "Fujitsubo Factory" embossed on them. Magic sound!

Fuel in Sydney is around Aus$1.13 a litre for the good stuff(98ron)at the moment, Times 4.54 will give you Aus$5.13 an imperial gallon

..Or times 3.8 will give you Aus$4.29 a US gallon.

...Or as Aus$1 = US$0.77 , US$3.30 per US gallon

Basic Unleaded (91ron) is around A$1.05 a litre.

Jim.

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Hi Derrick, I too would love to find a twin pipe setup for my car. There are some reproduction twin pipe exhaust systems in Japan. Trust systems are not made anymore, but I think Spirit Garage out of Japan makes a system. I am not 100% sure on that, but this summer I am going to do some research as I need an exhaust system and I would wait and pay more for a twin pipe system. Take a look on the z webring (google search). It is almost all in Japanese, but you can use the google translator and translate some words and prices. I will dig through some of my Old timer magazines and see if I see a twin pipe system. Welcome to the club.

-Ben

p.s. $2.48 is the cheapest for 87 at the Safeway with membership.

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I have fabricated the dual exaust 2 1/4" OD exhaust to two megaphones for my BRE Replica and I can tell you it makes some noise! 114 DB or so. Beware of a big jump in noise going straight dual exhaust.

R

P.S. 110 Octane leaded Race Fuel $6.00 USD a gallon.

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I have heard your car before Ron and it was music to my ears, but it was the loadest Z I have ever heard. I would not go with open pipes for my car. I am in need of an exhaust system from the head and back and I am thinking of a good quality header with a twin pipe exhaust system like the S30 option in Japan. If I cannot find that I would like to get a 2 1/4" system custom made like what Victor has on his car.

Ben

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We have discussed the Japanese market dealer options on this Forum several times, and the twin pipe exhaust system ( standard equipment on the 432 & 432R ) was included:

S30 Japanese market dealer options

HS30 Japanese market dealer options

The standard front diff crossmember on all S30 / S31 models ( for all Export markets as well as Domestic ) had two exhaust-clearance cutouts for good reason......

I have the Spirit Garage stainless steel twin pipe system on my ZG, and can vouch for its quality. I also have a genuine Nissan ( mild steel ) twin pipe system which will be fitted to my 432R replica. See pics below:

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post-2116-14150795247067_thumb.jpg

post-2116-14150795247229_thumb.jpg

post-2116-14150795247386_thumb.jpg

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Derrick,

SPIRIT GARAGE make the stainless system you can see fitted to my car in the above photos. It's a good quality piece and should last a long time. They have special offers on these from time to time, so maybe talk to Itagaki san ( the owner ) and see if he will do you a deal.

Spirit Garage are in Gunma ken, so maybe you should take a drive up there. Itagaki san might even show you his race car - which is pretty impressive.

Spirit Garage tel: 0270 620441

Good luck,

Alan T.

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