Does anyone on here have a Supercharger kit on a 986?
 

I was just curious what you all are using for management?

and here:
http://986forum.com/forums/performance-technical-chat/7067-supercharger-installation.html

Yea I read those postings sucks that one with the installation pictures are gone. Those are so old as well so doubt they are still on as I tried to message them with no success

Yeah, it loses a lot without the pics. He (ohioboxster) had the process pretty well documented.

I don't know about the tps supercharger setup, but their turbocharger kit uses a flash to the stock ecu. There aren't any great options for aftermarket ecu systems to run on this car unless you're gonna piggy back one and then you're gonna have to start from scratch with the setup. If you're running boost, just keep the stock ecu, upgrade the intake and use a 996 flash, and then use a standalone boost controller. This is obviously easiest with a turbo setup, but you can rig a solenoid-controlled BOV to limit your boost to 5-6 psi on a SC application, which is what the tps systems ran without issue.

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Yea was really hoping to touch base with him but no luck. There were a few others who did a supercharger on some threads as well but was unable to get a hold of them either. Figured that was the case considering how long ago the postings were.

I shouldn't have but did stumbled upon a TPS Supercharger kit and picked it up. Seems to have everything other then the actual fuel controller. TPS didnt really help much but if I remember reading somewhere they used Unichip for the Fuel controller and thats it. No timing or anything other then additional fuel from the 7th injector. Its only boosting 5lbs so they stated fuel controller is all I need and I should be good.

I found a few controllers like the Perfect Power, Split Sec and Unichip who stated they can work.

You are correct, TPS uses Unichip for their tuning. A memeber on here installed a unichip for fueling adjustments (I think it was j fro?) so you can check out his threads.


If you install the intake piping from the SC before the MAF, the MAF should be able to measure your air and make fuel corrections accordingly. Thats why I said to use a 996 tune - (note that I havent verified this yet but it makes sense to me) low boost is going to move enough air that it will be close to the ballpark for what a 3.2NA will move, and the computer doesnt care what the actual displacement for the motor is or NA vs FI, it just sees air movement and feeds it fuel accordingly. You may be able to get away with using the stock 986 tune but I would be concerned that you will reach your enrichment limit and run lean. The other upside of using a 996 tune is that if you are running near stoich in closed loop and having detonation issues, you should be able to disconnect the MAF which will kick the car into open loop operation which will enrichen your mixture.

Out of curiosity, where the hell did you find a TPS SC kit? They are ancient - before you put all the work into it, you may want to have a good mechanic check it out to make sure that all is well with the system. Those things have to be oiled, and I would be concerned that if its been sitting for a long time you may have some bearing issues.

Only problem with 996 tune is that I live in Cali with the hardup emission laws so not sure how that will fly. Technically having a charger on there wont pass visual but most smog stations wont even bother opening up the rear as its to much work. As long as they see it as a 1999 on the DME and fuel and everything is stock i should be fine. MAF would have to be before the charging pipe closer to the air filter but I see what you are stating. Plus the advantage of the 7th is it will help cool the charge a bit. Im still going to fabricate a air to water on it. Just trying not to mess with the actual DME if I dont have too. The AIC will pretty much kick on at boost.

Ive always looked around for one expecting that I would never find one. I really didnt want to throw it on as its more money Ill be throwing at this which I really didnt want too but having another supercharge vehicle that isnt daily driven anymore I sort of want to have a daily with a little fun!

Anyways I have a friend of a friend who had one just sitting which he was going to put on but ended up putting more money and time into his 80's 911 knew I had a boxster Im trying to get running and asked if I wanted it. So me being me said sure why not! lol

Im going to probably tear it down and rebuild it depending on the feel of it. The least Ill do is put new oil in it. Cant be to hard to tear down as Ive rebuilt a few Vortech Chargers but will see.

Yeah, looks like he's not even checked in here for a couple of years. He used to be an absolute regular.

After he did the supercharger thread, I got a hold of him via PM. I was curious, especially since he was from the Akron area and, starting in 1997, I was too. We chatted, and made vague noises about getting together so I could take a ride in this newly created beast of his. But the timing was never right, it never seemed to pan out, and, not long after his well-documented 986forum SC thread, he ended up selling it and getting (IIRC) a 911 Turbo. Which he also told me I could get a ride in at some point. Which, naturally, also seemed to fall through the cracks.

Anyway, I have no idea if he even lives around here anymore. I'd be curious one way or the other. To include being curious as to what he's driving these days. :D

Its sort of scary actually! Every thread I read they had a few people who did the kit or was in the process and after a few years of doing it or scratching that off the table just disappeared! I get it...its been years since they did it or was thinking of it so probably moved onto better things but I thought they would be around to give others who want to do this some feedback. I get these motors are high compression and dont like heat! Not going to lie a bit nervous as I dont really know these motors that well but I think I can do it following the same fundimentals like any other car. Just got to figure out my fuel route and everything else should fall into place. Wishful thinking.

Soundd like you know what you're doing so best of luck with the project. Let us know how it turns out!

Speaking of the Cali CARB stuff, I'm sure you've already heard but they just changed the laws to exclude ALL non-oem tunes that aren't specifically CARB approved. I would be really careful about trying to sneak a piggyback like unichip past them. Fortunately live in a state that doesn't give 2 ****************s about the environment, thank God I'm a country boy!

If you have any questions about the 996 tuning, I'm happy to help. I'm not very useful with the other stuff though.

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I've got an M90 on my 986... I feed it with a 600 CFM Edelbrock, and the spark comes from an MSD 6AL box. LOL

Don't forget the"full retard" timing box.

Btw, how's the nox working out?

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Won’t say I got it handled till it’s actually in the car running lol 😂

Damn it that’s right! **************** I wonder if it will detect it as it’s just controlling a 7th injector and nothing more? Going to have to see if the M3 passes as it’s using a programmable chip on the DME. Had no issues with smog prior and passed with flying colors but now you got me concerned. I got headers and exhaust waiting to go on the 986 as well and most likely won’t pass visual but wonder how much the plugin is going to detect. Anyone in here in Cali have more knowledge on Cali smog!?!

Thanks and I’ll keep you in mind if I end up going that route

Yes another force induction 986. How’s it running? Are you running full replaced injectors or an additional injector setup? How much boost are you pushing?

Don't let him fool you, that setup is on a Chevy small block v6 that he swapped in.

Cali is going all out with the new regulations. It's all over the interwebs, just check it out. They are no longer just doing emissions readiness and sniff tests - it's a full blown ecu interrogation It's a big enough deal that Honda has gone through the process of getting some of the hondata flashes CARB compliant so that the ricers well have something to work with. I think it's gonna leave a lot of people SOL though (your m3 included most likely)

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Lol ok that explains the edelbrock and msd. Damn that thing must be pretty quick.

Cali has always been pretty bad but they are taking this to a whole new level!

California government says "we burn coal only; no gasoline cars here". LOL

Not as fast as you'd think. :D About 10psi.

Just register the car to a mail forwarding address in another state or county with no emissions.

IMHO superchargers on a 986 stock motor is a losing proposition. One distinct problem is the high compression and lack of dome volume in the stock form. These engines want a cool dense air charge. A supercharger running high pressure looses efficiency by creating heat of compression aka adiabatic heat. This is a killer as the supercharger is simply heating the intake charge by beating from compression. Efficiency falls dramatically. To properly utilize a supercharger you want low compression around 8.5 to 1, flat top or dished pistons and large domes are desired. Reason being Theoretical volume. eg if you have a 2.5 liter engine (swept volume of the piston) and add 100 cc of dome volume (for illustration purposes) then you have now increased the theoretical displacement to a 3.1liter engine (2.5 L or 2500cc + 6 X 100cc.) This is because the supercharger fills the swept volume plus the dome volume. You can now use less boost pressure and increase adiabatic efficiency. You now enjoy the benefits of a theoretically larger engine, and a s the saying goes there is no replacement for displacement.

Long story short... Superchargers are just terrible.

I have 32 thousandths of ring gap in my car. Why? cause superchargers are just terrible. I also run 8.9:1 compression; and I still have a locked distributer with 1* of boost retard for each PSI over 2#s.

That being said there is NO replacement for the noises the roots blower makes right behind your head. Its simply orgasmic.



If you wanna go fast check out turbo. Turbo is good. The noises it makes are cool if its your first turbo car.


ike84: Na, I've been too chicken to run the nitrous yet. I spun a bearing and had to pull the engine... again. Oh well I got 2000 miles on this rebuild so give me a few more months of enjoyment and I'll squeeze the giggle gas button and break it some more. :D

Yea California is getting ridiculous! Depending on the city they do random road stops and if your car looks or sounds modified they run a sniffer to it and can tow your car right on the spot! Yes you heard me they have an actual mobile smog vehicle.

There is a place up North that has no smog laws but I think California is getting smart with that stuff. Not sure if forwarding mail will do the trick. Used to work from my understanding but never really knew how that works or looked into it. Most of my vehicles pass smog...well used to before the DME crap so will see what happens.

I hear you on that! I mean these kits are boosting so low I really don't think it would be a problem. As for the intake air heat Im thinking of throwing on a air to water intercooler just got to take a better look at things while the replacement engine is in.

He's got a point the sound of that roots is awesome. I know this is going to be pushing massive amounts of power but I really think I can make this pretty reliable once I figure everything out

On a side note does anyone have the 987 airbox installed? Did you end up using the 987 mass air flow as well? This kit didn't come with the intake piping and Im trying to figure out if I want to go with the 987 airbox and maf. Cold air intake is another possibility. Just trying to see what my options are.

Also how well do these dme's work? Would going with a 987 maf help with a little bit more fuel to the factory injectors? Im trying to keep the dme stock due to the new regulations and use a aic for the additional injector only.

Correction I mean to say not going to be producing massive amount of power.....

I just saw this, i have a TPC supercharger in my 98' 986, installed it myself.

Let me know if i can help.....