They stopped using Rotrex a while back after designing what they say is a better drive system. They weren't happy with the falure rate and other things on the Rotrex units. They have detailed info here, click the tabs to get to the various info:
GT Supercharger

The twin turbo they are working on is an engineering excersise to see what's possible. A S/C is not off the table either, but they are not really putting it out there right now because they don't want to piss off anyone if they decide not to produce one or either. The OP must have found out about it through a friend. I think I'm going to see a friend at HKS soon and I'll look at the car if it's there, but I don't know what I'll be able to share.

Please let us know something. Hope they show sc at TAS 2010!

Where that gain is, and how reliable the engine will be with it! :)

+2:bowrofl:

has anyone heard anything from HKS regarding either of their FI options?

Alright here is an update.

I went down to HKS to test and exhaust (I'll have a seperate post on that later with some pics). They have thier own Z and GTR. The Z had an incomplete partially prototype turbo system on it. I say partially because the kit is using parts from thier "set up kit". I'll explain what that is below. It wasn't complete as it had no finished I/C or intake piping yet but it did have cast manifolds, turbos, turbo exhaust outlet housings/pipes, and front mount intercooler cores mounted up. The intercooler had some piping and the cores were separate (one for each bank with thier own in/out but mounted together similar to HKS's Z32 front mount if you've ever seen that kit.

At this point there is not much else to share except that it is still and engineering excersice with no sure answer whether they'll make it or what the cost will be. Judging by the amoun't of parts used I wouldn't expect it to be really cheap though.

If you have plans to do a custom turbo kit they make what they call a set up kit. A set up kit is basically the major components to get started, but no vehicle specific piping and engine management. Those parts would be left in the hands of a capable shop or installer if you have the skills. In fact the set up kit is that same as the VQ35-HR kit. I was told that the compressor outlet pipes will not work on the Z34 but most of the rest will work. Here is a pic from thier site that shows a VQ35DE set up kit, I was told they look very similar:
http://www.hksusa.com/images_products/3388.jpg

Here is a list of set up kits with different turbo options from thier site:

HKS VQ Set Up Kits

All I could get on the GT Supercharger kit was it's being considered but no ETA right now. I was left with the impression they are going to look at it because my friend mentioned what a pain in butt a mounting location would be.

Sorry nothing more concrete for you guys except it looked bad assz lol.

Cool! But, holey over sized pic Batman.

LOL I was getting an error when I tried to post the smaller thumb nail. If you click the link to the application guide the pic is there also in a smaller size. Sorry.

Yeah that pic is huge and this is the best news I have heard in a long time! I am dieing to see those pics you speak of!!!!! So HKS products are developed in usa and not in HKS Japan??? You must live close, like a said pics would be killer G Fo12ce

Edit: Sorry for the wall of text lol. Little bored at work.

ALL of the products are made at HKS Japan.

I got to tour the factory once and it's very impressive. They have crazy stuff there, for example in the exhaust factory they have a long isle with every hanger for every exhaust they make in bins on both sides. The Isle is like 100 yards long and the shelves are really high. When they are getting ready to start a production run a guy types in part numbers on a console and a robotic arm slides on a track and goes and retrieves the hangers for that run. There's more cool stuff obviously but that stood out in my mind lol.

In terms of HKS USA how it works is HKS Japan will send over lets say an exhaust for an EVO. HKS USA will test it for fitment and make any modifications necessary, Dyno, decibel test it ect. Once they are happy they send it back and say "make it exactly like this". Sometimes you have JDM cars with shorter bumpers or equipment differences that necessitate USA to change it.

In recent years HKS Japan has wised up and taken more input from it USA counterpart in the design phase, because after all they know more what the car culture here will want and what will sell. Instead of the "here, we made this, this is what is cool in Japan, sell it there" attitude. I don't think it's as much as the USA guys would like but they take what they can get I guess. That being said some parts start the design phase in USA, although not many. For example I believe the Dual Hi-Power exhaust for the 350 was made/tested from scratch here for us by the techs at HKS USA and then made in Japan and shipped back over. Same for the 370 version.

That is why you've seen some posts from guys in other parts of the world saying they have trouble ordering it from their dealer’s in say the UK. It's a part they make for the US only and is not in the international "Good Master" catalog. Also I believe their S/C "kit" was designed here, although the blower design was done in Japan obviously. It makes sense if you think about it. It would be unwise to take parts designed and made off JDM cars and just resell them. If they don't work right on US cars customers get pissed and you ruin your name. I think they've done a pretty good job protecting the brand from that kind of stuff. The fact that certain items are designed here like ECU tunes or other items shouldn’t take any "shine" off their products for the JDM fan boys. The 3 guys that run the R&D at USA are super old school and knowledgeable Japanese guys who really know their stuff, and some sales/tech guys/gals who know the market.

So to answer your question, I think HKS USA may be leading the charge on the forced induction kits for the 370Z and reporting back to Japan. If it gets made, it will be made in Japan with input from them along the way. They sometimes send an Engineer over for certain phases of projects as well.


Anyway I don't live all that close, about 45 mins away in South Orange County. HKS is in LA. I only know all this stuff because like it said in my intro post I worked there for a time (about 8 years ago) and still have a few friends there. I figured I would just try to share whatever I knew for you guys although it wasn't much. I'll see what I can do about a pic but it's whenever they want to let me take it. I have to go back on Monday to pic up my stock exhaust, I'll bring my camera lol. Other than that I don't go there much as it's pretty out of the way for me.

I dont think I have ever seen a pic or video of a 350 with the hks setup kit. Anyone know where I could find such media??? Hope they give updates on the kit like greddy and other companies did!

I know the guy who bought the car HKS used to market the S/C kit. He has a user name on this forum too. I'll ask him to PM you or post something here. It might be a little off topic.....

I'd love to see it as well, see if he can be persuaded!!!:happydance:

Well I know this isnt very relevent for you 370Z guys, but I owned two HKS Dragger II exhaust's for my IS300.First one I sold because I needed a quick buck, but I loved the sound, fit and finish, and the overal quality of exhaust so much I bought another one.

Just from those two exhaust purchases I will be an HKS customer as much as my pockbook will let me.

HKS GT Supercharger. The engine cover is an HKS/Kansai Service dry carbon that a few companies are in the process of copying...:shakes head:

http://i345.photobucket.com/albums/p...ser/motor2.jpg