Ok, i started this post about intake Manifolds a while ago when i was looking for one. Meanwhile i got a nice, oldschool FET intake sitting in my shelve and waiting to be refurbished and installed. Well however since then i found more and more other options and thought i make Post about all classic and Modern Intake manifold Options from the Land of the rising sun. Im a JDMjunky after all 🙂 I know there are plenty of other (mainly US) options but this is about the japanese only.
1) Triple-carb Intakes manifolds / kits:
Sanyo Kiki / SK / S-三
Japanese brand which still exists, but has been splitted into different groups and doesn’t produce intakes under that brand name anymore (See below). I so far found three different designs:
The Very first one was marked with “S-三” only:
Thanks to duffy, who sent me the pictures of his slightly different SK-intake Manifold with what appear to be bearings at the Linkage? Also the SK-casting on the manifold itself (left side) seems slightly thinner). Maybe the bearings where there for better and smoother throotle feel. It seems like there are a few different versions with some small changes, probably improved designs over the years…
In 1983 Sanyo-Kiki was splitted into different branches and their Carb-business got renamed to OER Corporation. Since then the old SK-kits have ben redesigned and sold under their new brandname either as Intake only or complete OER Sports injection kit (Still available new through OER Japan):
Ohtsuka / Otsuka / 大塚 :
I don’t know if Ohtsuka / Otsuka / 大塚 is a Brand name or just some other description. But well known Alan Thomas of 240Z Fame identified this one as an “Ohtsuka” Intake manifold. The previous Owner Ray A. allowed me to use his pictures. Kudos Ray!
If you look close you can see it looks very similar to the datsun competition Manifold, but the fin in the center of the competition item is at the edge in the Ohtsuka type manifold. Also the funnels appear to be a bit shorter in this one. If anybody has more information about this, please let me know! BTW. i don’t think it was blue when it was new, someone must have painted it over the years 😉
I’ve also seen them labelled “極東” on some 4-Cylinder Manifolds.
It appears that the company still exists but now mainly produces boss kits and racing gear:
Later versions came branded as F.E.T. (Far East Trading) and had the additional Balancer tube on top. This is what i got for my car. I heard the balancer tube makes idling adjustment a bit tricky but i got it mainly because of the finned design will fit my Kakimoto valve cover excellently.
Compared to some other brands this one has very short funnels which is great if you don’t have much space.
I first wasn’t sure if it was a japanese brand at all, but a bit of googling and i found some adverts and pictures of similar Kits for the A14 Engine (Pictures courtesy of datsun1000.com). Unfortunately, i wasn’t able to find more Information or Pictures from an L-series Setup or Kit.
It seems like they were among the first companies to use dyno’s to tune their stuff. Their kits are sometimes also dubbed “Solexcel” Kit which is a complete kit with Solex Carbs and Excel manifolds, etc…
Looks pretty similar to many other designs but is still available and probably the technically most advanced, modern and best engineered design. aside from all the annodize bits i think it looks very oldschool 😉
Intake Manifolds are still availabe new from kameari Japan for various carb sizes and applications. UPDATE: I got noticed that Kameari just re-sells Harada Shokai intakes. and comparing the pictures this might be very true. Unfortunately i cannot understand the japanese text in the kameari catalogue to confirm this. but most probably this is true as the Pictures, partnumbers and kits look very similar and still both are available 😉 Unfortunately often referred to as “Kameari Intake” which is wrong since it’s a Harada 😉
2) Individual Carbs / intake manifold kits:
SS-works Individual carbs system:
Instead of using 3 carbs for 6 cylinders, SS-works Japan is using 6 small Keihin FCR 41 Carbs, designed for motorcycle application, for the L20 / L24 / L28 Engines together with a custom-made Aluminum intake manifold.
They promise a unique sound coming from it and individual throttle-body like response, as well as easy handling, compared to the more dated carbs often used.
I wasn’t able to find a better picture than the one on their website:
3) Turbo kits / intake manifold kits:
HKS Pre-Surge Tank versions
Worlds first ever off-the-shelve Turbo kit was developed by HKS in July 1974 for the JDM Kenmeri GC100 Skyline’s L20 Engine with single-carb. It was called the “FET” Turbo kit (According to some japanese source, because it was developed in a partnership with the Company Far-east-trading (FET, mentioned above)). But it was not marketed under the HKS brand first. It improved Power by 40% from 115 to 160 PS and Torque from 16,5 kg/m to 23,0 kg/m.
However it appears that later version was Sold onder the HKS Brand. This one which i found and bought lately. Read more Details about it HERE:
Update 30.08.2017: Got some pictures of the full kit, see also more detailed pictures and the history about it HERE: https://www.jdmjunkies.ch/wordpress/2017-06-21/ive-got-worlds-first-turbo-kit-hks-c100-skyline-l20-street-turbo/ It appears that this later version was built in a similar way, but for the 4cylinder L-series Engine (L16 / L18)
Due to the huge success, HKS wanted to Improve the design. They Bought a Turbocharger made in the USA, reverse-engineered it, improved it and created a new Turbo kit, used in the Toyota 18RG engines and the Skyline Japan’s L20 with twin SU Carbs:
Read more about the HKS Kits here:
HKS Surge Tank version 1
The rare (and sold expensively nowadays) HKS Surge tank Version 1 was an early design. Not sure what L6 Engine (L20, L24, L26, etc) it was built for. most probably the L24. I first thought it was just some kind of an airbox to put on the carbs and then add a Turbo on the front. But my buddy Krisztian explained that these have a pretty smart design so that the venturi principle also works under turbo-pressure and it has an almost perfect airflow to the carbs. pretty crazy for that age. These kind of setups are also known as “Blow-through-Turbo-Setup”
HKS Twin Turbo Setup
If you compare the pictures above and below, the little “Add-on” part on the surge tank looks different. but the one in the catalogue below is stated as a Twin Turbo kit in an official HKS Ad, and i guess it was used mainly for the popular drag-racing back in the days then, on the late L28 engines 🙂
HKS St. Turbo Kit
Aside from the mainly Z-based kits shown above and below, HKS Also offered a Turbo “Upgrade” kit for the C210 Skyline “Japan” which already came with a low-pressure L20ET turbo-Engine from the Factory. This Upgrade kit with a bigger turbo and the Piping would improve power. I guess this one will also fit other L-series engines but not sure about that (and probably needs extra parts from a factory-turbo L-series to fit the non-turbo engines)
Tomita Auto Turbo “Hayate” Kit:
A Company called Tomita Auto (By Race Driver Yoshikazu Tomita, later part of famous Tommy Kaira) made a very similar Turbo Kit for the Fuel Injected L-Series Motors called the “Hayate” (Storm / Gale) Turbo Kit (See also here)
SK Compo Turbo Kit:
Since Big power-figures was all the rage back then, not only HKS came up with a turbo / Twinturbo kit but also Sanyo Kiki. There was the SK Compo Turbo Kit which was more or less an Blowthrough-Airbox for their SK Sports kit mentioned at the beginning of this post, similar to the HKS System.
The picture below shows a similar SK Compo kit used with the SK Sports kit for a twin-turbo setup (See turbo manifold at the bottom), but i’m not sure if Sanyo-Kiki ever officially sold this kit or if it was just custom-made out of the normal Compo Turbo Kit:
Here’s an ad showing what i guess is another design full kit, similar to the HKS Above (with a less crazy surge tank) at the left and on the right side the “Standard” SK sports kit with Solex carbs and SK Filters 😉
Well there are/were other Japanese Manufacturers but sadly wasn’t able to find any pictures or informations of these. if you have some Pictures, Data or Ads, i would be very interrested!! Get in contact if you have some pics or information or know anything about another Japanese manufacturer i missed here, or if you have more details on one of the ones liste above. i’m pretty sure there are more out there and i’m sure the datsun community will like to know about them 🙂
Others (Non Japanese)
As mentioned above, this is about Japanese manifolds / turbokits. However, readers like to point out others all the time, so for completenes sake i’ll mention some others too 🙂
– Bell Engineering
– Clifford Performance 4-barrel intake
– Arizona Z Car 4-Barrel intake
– Cannon induction systems (Torrance California) Intake manifold
– TWM Intake manifolds
I’m sorry to say that some of these Pictures are not mine. I collected them over many years from the Internet and unfortunately i was often not able to track down the the original source anymore.
The sources i know are
– Kameari engineworks Catalogue
– Harada Shokai Website
– Various Ebay sales
– Datsun Competition Website
– https://www5.plala.or.jp/power_planning/history.htm lots of old SK ads!
– HKS Website
If any of these Pictures are yours i will happily add your credits or remove them upon request. I tought it’s ok to post it here since it’s about General interest and knowledge to every Z-owner to learn some history and sadly too much of this Information already disappeared in some bookshelves.