I just came up on an hks supercharger for the 16v 4age. I was wondering if anyone has any experience with these. It came pretty much complete with all of the brackets and everything. My question i guess is if it will fit the 4agze engine that was converted to the 4age...basically i bought a 4agze and took off the supercharger and put on all of the 4age brackets and manifolds etc on the gze block. The crank pulley and water pump are gze but i know that the 4age water pump wont fit because it is too long to line up with the gze crank pulley. Will i have the same issue when put on the supercharger? Will it most likely not line up? Will i have to convert to the 4age crank shaft and or crank pulley? Any help would be much appreciated!

For the pulleys it's not an issue of NA vs GZE it's an issue of transverse vs longitudinal.
I can't guarantee but I would bet the supercharger is designed for transverse. This isn't a problem as long as you get the right crank pulley and install a transverse water pump and pulley and adress all other accessories such as alt, AC, power steering.
Of course this also means you would need to run an electric fan.

Why did you take off the supercharger?
Are you on NA or SC ECU?
Why run the HKS over the OEM?

i am running the NA ECU, eventually will get megasquirt or hks fcon. I already converted to electric fans. I heard the oem supercharger wasn't very good and i didnt want to convert the gts wiring to gze wiring. I dont have AC or power steering, only alt, water pump and crank. So you are thinking that i might have to switch the crank pulley and possibly the water pump as well to get it to fit properly?

That HKS is going to be nearly identical in performance and efficiency as the stock blower. It's either made by the same company who made the SC12 or it's a knockof of their design.
Doesn't look like the HKS kit runs an intercooler which puts the stock system in the lead.

You can run an SC12 on the stock NA ECU. up to mild boost. 5 PSI or so shouldn't be an issue. 8 PSI+ with some tuning and messing around. You just need to use a vacuum switch or something like that to trigger the SC.
A turbo would be much more efficient and less hassle though.
I have seen a few HKS kits run in transverse cars and never one for FR layout so I assume it will be for transverse. I do come from more of an AW11 background though so there is always a chance they made one spaced for the longi components and I just haven't seen it.
Only way to know for sure is to mock it up.

A buddy of mine had an MR2 and it made more power with the stock blower and a tune than with a built engine and HKS blower. Go turbo, more bang for the buck.

this is all going in an ae86...not an mr2. With that being said, turbo is way better then? and the hks was a waste of $500?

From a performance standpoint yeah a turbo is going to be better in every way.
It's my understanding that the HKS units are very rare now and worth more as a collectors item than a performance part. I suspect you could at least make your money back. I'm surprised you got it that cheap.
Where did you get it?
Throw it up on ebay with a $500 reserve and see what happens. Advertise it here and on the MR2 boards and I'll bet someone grabs it up.

i bought it off of yahoo auctions in japan, had a friend bring it over...i don't really want to sell it but instead i want to run it and see how it goes...the guy i got it from said he switched to turbo eventually(thats why he was selling it) so that seems like the more promising route in the long run. Also, the 4agze swap that i got, didnt have an intercooler built in to the S/C so i would think that the hks would be somewhat better for corolla applications since i didnt need to do all of the re-wiring...i will install the gze injectors though and re-wire those...i feel like i should've kept the 4age and rebuilt it then put the hks in rather than going to the gze and putting the hks in...i was just wondering if anyone here has tried to put the hks in a gze engine and seeing what issues they came across if any.

Also, what's a good turbo setup to go with? I've seen a few setups on ebay but they look a lil cheap...

There would be no more need to wire the GZE ECU in with the SC12 than there would be with the HKS kit. With the GZE you would just need a way to trigger the SC clutch which wouldn't be hard. Some people have wired them to stay on but I don't think the stator is designed for that. Or you could just tack the clutch to the drive plate like a welded diff lol.
All GZEs came with intercoolers so yours must have been removed. The old roots blowers are horribly inefficient. I would never run one without an intercooler. Just 6 PSI boost with 100 degree inlet temps will take you up to 200 degree outlet temps. That going straight into the engine is not good for performance and will make it much more likely to get detonation.
Even a very crappy intercooler would get you back down to about 130 deg and adds a little heat sink.
10 PSI takes you up to 265 deg. You could literally cook your lunch on your intake manifold.


If I can make a couple suggestions.
Hook up a wideband before you hook up the compressor so you can get familiar with it's natural AFRs and also make sure everything is working right.

Do not use GZE injectors on the NA ECU. They are too big and it will run like crap if you can even get it started.

Start with the lowest boost possible and build up from there.
I have no idea what ratio the HKs is or what kind of boost it will want to make. The GZE crank pulley is bigger than the NA so the SC12 on the NA pulley makes I think like 5-6 PSI on it which is a good starting point.


If you decide to go turbo I can get you setup with quality and reasonably priced components.
I do make a production bottom mount mani that is designed for the transverse setup but it may work in FR. I still need to get a motor in my 86 to mock it up.
I should be able to make a top mount mani for about the same price. Once I have a motor in the 86 I will also be able to offer a lot more options as far as fitment and also be able to make downpipes and stuff like that.
http://www.matrixgarage.com/?q=store/tu ... boing-4age
I can get new turbos like Garrett and others but they are pricey. There are a lot of good options for small used turbos like the 13T, 13G, DSM T25, Nissan T25s and 28s etc.

aukword1 wrote:this is all going in an ae86...not an mr2. With that being said, turbo is way better then? and the hks was a waste of $500?

It's not an MR2 but it's the same engine. i wouldnt say its a total waste, you could run low bost with meth injection and thats better than no boost. But its very inefficient.

So it seems like the hks would get really hot then without an intercooler...i guess it really would lack in performance compared to the stock charger...i wouldnt out on the gze injectors until i got an ecu upgrade....i guess since i have it i will try it and see how it runs...i will update this post with my finding and such...right now i have to fix the rear main seal and the driveshaft seal into the tranny first...if i dont like the charger i will probably go turbo...so i might need some stuff from you yoshi lol thanks for the replies

Sounds good.
Be smart and run a wideband before boosting it.

This one isn't cheap but it has some great features including the failsafe.
If you ran the stock SC you could even wire it to cut the SC off if it went too lean.
On the HKS you can't do that but you could wire it to a warning light, buzzer, or even an ignition cut or something.
http://www.matrixgarage.com/?q=products ... safe-gauge

thanks man, i do need a boost gauge anyways so i might as well pick that one up...do you own matrix garage?

Yep, that's me.

Iwould you be willing to do some custom fabrication? I want to reroute the coolant temp sensor and the cold start sensor to the rear of the head...ill post a pic soon...but just let me know if you are willing

actually its not the cold start sensor on it...its another sensor..i'd have to make sure which one it is but it i am looking for something like that...the guy that i bought the charger from had that piece welded on the back of the head so i cant get it until i actually go to japan for it lol

Yeah I should be able to do that.

Rhank you man...give me a couple of days to figure it all out and i can send you the specifics

Cool piece, but hold on just a minute. These were meant to be used on a stock 4age engine, with an HKS F-Con and GCC with the NA ecu.

You could use a wideband instead of the F-Con and GCC, but you have apparently forgotten something else here. The 4agze that you are using has low comp pistons. This was meant to be used with standard 4age high comp pistons. The HKS will only put out about 4-6 psi, as that is all a 4age with standard pistons could use without issues. If you run this on 4agze low comp pistons it will run like a dog no matter what you do. You definitely need to change pistons to make this work properly. And yes, 4agze injectors will only make things worse as well.

While it is a neat piece of history you would be much better off putting the SC-12 back on, along with all the 4agze wiring and ecu.

Kando wrote:Cool piece, but hold on just a minute. These were meant to be used on a stock 4age engine, with an HKS F-Con and GCC with the NA ecu.

You could use a wideband instead of the F-Con and GCC, but you have apparently forgotten something else here. The 4agze that you are using has low comp pistons. This was meant to be used with standard 4age high comp pistons. The HKS will only put out about 4-6 psi, as that is all a 4age with standard pistons could use without issues.

That's funny cause I know people who have run 15 PSI on the early 3 rib pistons without issues. Granted it was with aftermarket engine management.
I have also seen people run 8 PSI on a stock NA motor and ECU with minimal tuning.

Kando wrote: If you run this on 4agze low comp pistons it will run like a dog no matter what you do. You definitely need to change pistons to make this work properly.

It's my understanding he it running a GZE motor NA at the moment. If so he has felt the full potential of what the GZE can be. Any gain from there will be a notable improvement.

While I agree with your overall message that there are better ways to go there is nothing inherently wrong with the path he is taking.

Thanks yoshi, I am not trying to go full blown power or change any of the wiring...i swapped the gze in it to run NA until i got the HKS charger for it, that was the goal from the start...i know if i go turbo or run the gze wiring and charger it would be better but i want to see the difference in power myself...the purpose for bring the gze into it was because of the low comp pistons, i know if i rebuild the block and get some nice forged pistons with a hi comp it would be better but i felt that this was the best "stock" route to go at the moment...if the charger runs well with megasquirt and the hks then i would be happy. I can always upgrade from there, where necessary...btw Yoshi, the sensors at that point really were the cold start sensor and the temp sensor, if you could let me know how much it would cost, i would be forever grateful...thanks for replying guys, any input is useful to me. much appreciated.

yoshimitsuspeed wrote:

Kando wrote:Cool piece, but hold on just a minute. These were meant to be used on a stock 4age engine, with an HKS F-Con and GCC with the NA ecu.

You could use a wideband instead of the F-Con and GCC, but you have apparently forgotten something else here. The 4agze that you are using has low comp pistons. This was meant to be used with standard 4age high comp pistons. The HKS will only put out about 4-6 psi, as that is all a 4age with standard pistons could use without issues.

That's funny cause I know people who have run 15 PSI on the early 3 rib pistons without issues. Granted it was with aftermarket engine management.
I have also seen people run 8 PSI on a stock NA motor and ECU with minimal tuning.

Kando wrote: If you run this on 4agze low comp pistons it will run like a dog no matter what you do. You definitely need to change pistons to make this work properly.

It's my understanding he it running a GZE motor NA at the moment. If so he has felt the full potential of what the GZE can be. Any gain from there will be a notable improvement.

While I agree with your overall message that there are better ways to go there is nothing inherently wrong with the path he is taking.

Sure, with some very careful work you can run higher psi into a standard comp 4age, but I doubt many would recommend it, or expect it to last very long. There is a very good reason why TRD bolt-on kits only run about 4 psi.

I double checked on the HKS kit, and it only puts out 4 psi. The sc-12 puts out 8 psi. With the standard 4agze low comp pistons this is hardly going to run any better than a stock 4age at best. The effort to get it to run properly will require a wideband. The only way I see this working properly at all is if they tear the engine down and put in high comp pistons, but the cost probably isn't worth it.

From what I have read this is just a gze engine in an NA body. Therefore low comp pistons. You'd have to try over spinning the HKS sc to try getting it to run half decently, and that would probably burn up that early type sc in a heartbeat. FYI: the rotors on those HKS sc's are not teflon coated either.

So from my understanding, the only to get any decent use out of the sc is to put high comp pistons in it...i am going with megasquirt for the ecu management, guess i gotta get some forged pistons and rods before the install. The plate in front of the sc says it can withstand 1.8 Bar or 26 psi, i find it weird that it can only get a gain of 4psi even with the low comp pistons though. kind of a bummer lol might as well just get a 20v and turbo it

any suggestions for the high comp pistons?

would it be better to turbo the gze rather than build the bottom end for the hks then?

Superchatgers are rated in absolute pressure so that 1.8 bar means .8 bar over atmospheric or about 12 PSI. This is also identical to the Ogura specs. More signs that it's either made by Ogura or a knockoff.
Is there anything on it that suggests the displacement such as 1200, SC12, TX12 or anything like that?

The SC12 makes about 5 PSI on the NA pulley so if you found a GZE crank pulley you should make around stock GZE boost. Oversized pulleys should have a similar effect on that blower as the do on the SC12.
Remember though that intercooling becomes vital as you increase the boost. Personally I wouldn't run more than about 5 PSI without intercoolilng and even that is much worse than running with one.
12 PSI on that compressor will put you close to 300F intake temps. In this case you would have a hard time keeping it from detonating on low comp pistons.


I would love to sell you aftermarket parts but I don't think you are ready for that yet. Especially if you have a healthy running motor.
I think you should test this out and see what you think of it. You may decide you want to go in a different direction three months down the road and find that you dropped a bunch of money on parts that are no longer compatible with your next step. It's quite likely it would be compatible. For example if you decided to go with moderate boost like 15 PSI then some high compression and cams would still compliment it very well but I still say come up with your long term strategy first then plan your budget and time with proper prioritize and then start moving forward.
I still vote ditch the SC but if you must keep it this is my suggestion.

Get it running at the 4 PSI or whatever and start dialing in the tune. If you aren't on aftermarket engine management yet this would be a great opportunity to start getting familiar with it at a safe boost level. If you want a little more power at that point you could consider adding compression and cams but I really think at that point you will realize you wasted a bunch of time with this setup and that you should go with something more practical.

i respect your honesty, I will get the aftermarket management and everything setup before i even begin to boost. I will try the sc and see how it goes but if i dont like the power it comes with then i will probably seek a turbo route, in which case, i will need some stuff from you lol

The HKS sc blower was a TX-12, with 1160 cc capacity, and 11k rpm limit.

Well, you've got a couple of things to think about here, when it comes to upgrading engine components. To use the HKS kit safely, without destroying it, and getting decent safe output from it, you'll want hi-comp pistons, but probably not overly hi-comp. Remember that this was designed to work on a standard 4age engine before extra high comp pistons were introduced. So around 9.4:1 comp rate would be preferable. There is no absolute need for specialty pistons, with ceramic top coatings at this level of use. You'll only want to consider that if you try spinning it faster, but I've never heard of anyone trying that before. Most likely because these are such rare pieces no one has wanted to take a chance on wasting them by doing things like that. But if you did I wouldn't try getting more than about an extra 2 psi out of it, which means about 6 total. After all these were very early stage sc's before mainstream manufacturing of them occurred.

There is also a pretty good chance though that you will end up going turbo once you find out what this set-up does hp-wise, and in that case having put in hi-comp pistons already will be a bit of a limiting factor to later turbo set-ups.

Definitely some things to think about.