25 replies to this topic

[GENONE]

Do you have any pictures you can post of this HKS supercharger setup. I would like to see how it is all hooked up. FWIW, anything I have read about turbos, the MAP sensor has to be fooled somehow but I don't know if that applies to your application. JS

there are no instructions on how to install this and wire/link it up...

[lambs]

so just on the pressure (post) supercharger side? not 't' off and run both before and after?

I'd be interested to know why they suggested you do it that way. Perhaps something to do with the type of MAP sensor being used, but seems unusual to me. The MAP sensor needs to see both pressure and vac (closed throttle) and that's best done at the plenum connected to the head. It seems to me that having the MAP connected both before and after the SC would lead to boost 'bleed' and the MAP won't be reading the boost correctly (not good.....).

I should say that I have some experience with SC having adapted a Toyota 1GGZE SC to an RB30 in an R31 Skyline. The RB30 was NA so boost only need to be low, and as long as revs weren't pushed too hard the SC survived OK. Initially I ran it using the stock AFM but had concerns about going outside it's boundaries on boost, so I changed it over to run on a MOTEC M48Pro that I'd been using on the Z. For a MAP I used a 2-bar sensor from a SC Commodore V6 (that's the 3.8 Buick engine for you guys in the US). The MAP was connected directly to the inlet manifold and no T, but, it may be that the type of setup you have it's meant to use the MAP in that arrangement.

[strudel]

there are no instructions on how to install this and wire/link it up...

Cool, it looks like the mounting bracket was made especially for the ZC as it has HKS written on it. I would like to know where one would source this unit for future reference. It looks like a big honky unit. How does the rest of it mount up? Just to the standard plenum IM bolts or a special adapter plate?

I have a turbo going in my D16A1 this year sometime but was always interested in a SC. The only ones I had ever seen even close for our application was the Jackson Racing unit.

Any other sort of bonus information on the install would be worthy to have on site if you are able to accommodate us with that. I think I can just see the alternator tucked in underneath. Any problems with belt alignment, etc? JS

[GENONE]

Lamb... so what should I do? Its a stock Map sensor...

[anjin]

Cool, it looks like the mounting bracket was made especially for the ZC as it has HKS written on it. I would like to know where one would source this unit for future reference. It looks like a big honky unit. How does the rest of it mount up? Just to the standard plenum IM bolts or a special adapter plate?

I have a turbo going in my D16A1 this year sometime but was always interested in a SC. The only ones I had ever seen even close for our application was the Jackson Racing unit.

Any other sort of bonus information on the install would be worthy to have on site if you are able to accommodate us with that. I think I can just see the alternator tucked in underneath. Any problems with belt alignment, etc? JS

I've been helping Mike with this, so I have some knowledge about installing the unit. Mike can add/correct me.

It is a direct bolt on to the D16A1/3 block; HKS supercharger and HKS plenum into the standard IM bolts. The lengths had to be changed on a few studs, and similar fairly small adjustments. The sc supports made getting the intermediate shaft and the alternator attachment attached an interesting exercise, but again it was basically bolt on. Just get the order right.

The sc uses the standard crankshaft pulley drive - the power steering if I remember right - its a 4 rib pulley and not a v belt. The alternator didn't need any changes as I remember. The tricky part was working out the correct belt alignment - there is an idler pulley in there to make the belt clear the body rail. Once we figured that out, the belt was an off the shelf item re ribs and length.

The fuel lines need to be worked out, as the sc belt drive is very close to the strut tower, and thats where the fuel filter etc was positioned (rhd). An adjustable fuel pressure regulator is part of the set-up.

Sourcing it - no idea. Its the only one I've ever heard of.

[lambs]

Lamb... so what should I do? Its a stock Map sensor...

Well that's a good question. The stock MAP sensor on NA engines is generally not designed to measure any sort of boost. Either HKS supplied an appropriate MAP sensor with the kit, or they've found some way to overcome the problem using the stock sensor. I suppose the first thing to do would be to contact whoever sold you the kit and see what they did, or perhaps contact HKS direct. The other way would be to put it all together and then run it up on a chassis dyno while keeping a close eye on the A/F ratio.

[3GCVC]

is there any possibility you need to stop the ECU from seeing the boost then it will just work. put in some check valves and see if that makes a difference the computer should be tuned to take the boost if your using the HKS unit maybe it doesnt read the boost from the stock map and just pulls the fuel curves from the ECU.

also looking at the ECU you have of the pics i saved a while ago, what ecu is it? looks like a 88-91 ecu i have noticed your dizzy is not electronic advance which the ECU would be trying to control any error codes for it?

was it running on the last car it was on that browntop ZC powered car?

another option for you is to convert to OBD0 or 1 and chip and ECU and tune it that way to run the supercharger.

[lambs]

is there any possibility you need to stop the ECU from seeing the boost then it will just work. put in some check valves and see if that makes a difference the computer should be tuned to take the boost if your using the HKS unit maybe it doesnt read the boost from the stock map and just pulls the fuel curves from the ECU.

There's a possibility the ECU is mapped to the TPS. Many years ago I ran my Z - which basically has a race engine - using an Injec ECU mapped to TPS. This method doesn't work well on cam'd engines because of poor sensitivity at low rpms. Personally I wouldn't do it that way on a charged engine as you need a very accurate way of measuring engine load (ie MAP or AFM) to calculate A/F ratio, otherwise the risk of blowing the engine is high. That said, it's certainly possible, and one way to check would be to disconnect the MAP and see if the thing runs at all or throws up an error code. I'd guess that if HKS had it mapped to TPS they'd also effectively disable the MAP input in the ECU code and block that error code. I'll be really surprised if that's the case but you never know....

A Q - does the engine blow lot's of black smoke up to the current 3K rpm limit ??

[GENONE]

Nope - no black smoke... seems to be fine.

I did a bit of a look last night, the PA Sensor is meant to be hooked up to the ECU using 3 wires and they go in certain positions on the plug.... two out of the 3 are there... but the RED plug is completely missing and un-used my anything - hence the ECU throwing a code...

so i've hacked up another plug to get a connector, plugged it in and now i just need to splice the wires in... hopefully clear the code and get revs back over 3000.

[strudel]

It may be a totally different problem but this is a place to start. In a normal D16A1 the pinout locations for the PA sensor are:

R1=C9
Br/Bl=C12
Y/R=C13

C12 and C13 have other locations that connect to tthis pin as well. A wiring diagram is your best friend. JS

Good work, Here are the wire colours and where they go in the ECU again if you don't have a diagram. JS

[mn85crx]

GENONE did you ever figure out why the car was not revving over 3000? I am having the same problem with my D16A1 swap. I have posted a thread here, I think it was called Blacktop Actin Up. If you wouldn't mind, could you take a look at that thread and let me know if there is something I should try that I haven't already?

Thanks,
Scott