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.
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:
The second version is marked with “SK” and “SANYO”, while the overall functional design seems to remain the same.
SK Sports kit
The third version was a complete Kit sold with a later Sanyo Kiki intake cast-design but also came with the carbs and everything. Quite a popular choice and i like it:
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):
Was available new until around late 2014, not anymore sadly. If you compare the pictures it seems like this is an almost 1:1 copy of the datsun Competition or ohtsuka Intake (See below)
Datsun USA / Nissan Japan sold this intake Manifold as an optional “sports” Intake for the Mikuni / Solex PHH44 Intakes (Picture from the 1978 Competition catalogue):
I Don’t know if Ohtsuka is a Brandname or just some other description. But well known Dr. Alan 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 informations 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 😉
FET / Far east trading / Kyoku-To
Here we have an early Kyoku-To Design Intake manifold (Kyoku-To = Far east)
Later versions came branded as F.E.T. 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.
EXCEL / Solexcel
A reader of the European DPAN Facebook group emailed me a picture of his “Excel” Intake manifold kit:
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 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…
Mikuni is mainly known for their Famous Carbs (actually they built Solex carbs in licence) But they also had their own intake manifolds for the L6 Engines (picture shows a repainted one)
Like most others Mikuni sold a complete Kit Including carbs and all the bits for the L6 Motor:
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 😉
Here’s a closer look at one of them:
So far only got this single picture showing a Hayshi racing L28 Intake manifold and i’m not sure if it will fit the other L6 heads but it looks beautiful:
UPDATE: Found another picture on ebay:
HKS Surge Tank version 1
Now to the Turbo side of Things. 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 Surge Tank version two
Used a more modern Cast design and was made for the L28 Engine according to the Catalogue picture below.
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 🙂
Ad in old Carboy Magazine, Provided by Jeremy Wilbur – Thanks a lot!
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 “Hayate” Turbo 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)
Here is an old ad for the kit:
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 the full kit including the piping to 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 🙂
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
– http://www5.plala.or.jp/power_planning/history.htm lots of old SK ads!
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 interrest to every Z-owner to get some knowledge and history and sadly too much of this Information already disappeared in some bookshelves or the depths of the Internet.