Quadcammer

true.

But when you increase the pressure, fuel flow from the pump is going to decrease, so you'd need a larger fuel pump if it can't keep up.

Dick Beers

Have been running my 97 C4S with the TPC supercharger with intercooler for two years and about 6K miles ... no problems except the check engine light keeps coming on. The codes are for "random misfire". Folks who have no direct experience (ie: only opinions) need some real world experience to comment IMHO.

There are several threads on TPC here on Rennlist as well as on the Pelican board.

Go for it. Your car will be a rocket.

Land Jet

I only quoted what I was told by TPC. While I have enjoyed my supercharged 993, it can not compare with my new car. It is in a whole different league.

Stealth 993

Only if you max out the pumps fuel flow. If you end up only needing a few PSI more, the pump can handle it. If not, is getting a bigger fuel pump really a issue when you are dumping $5k on an installed SC kit?

Quadcammer

Right. Im not sure what kind of pump the 993 has, and what its duty cycle looks like in stock form. Id imagine it could handle 4psi, but I don't know.

No, getting a new fuel pump is not a big deal, but then again, neither is getting bigger injectors.

TheOtherEric

I thought I'd point you guys to this thread on Pelican. Russell has a chip emulator system working on 911's now. Seems to me that if he develops a 993 setup, you could custom tune a supercharger installation, using his emulator with larger injectors instead of the 7th injector with a piggyback ECU.

http://66.236.61.177/showthread.php?t=372582

That could also work on Ninemeister head installs, I'd think.

993_Pilot

I always wondered why someone hadn't come out with something like this before. I can buy a user tunable chip emulator (Power Commander) for about $300 for almost any motorcycle. I have one on my bike and it works great. You can get maps to download for free for just about any combo of airbox/exhaust mods. A live map for a bike usually runs about another $150-200.

JasonAndreas

Someone sorta kinda DID. The functionality is limited compared to the true programmable capabilities of the M2.1 & M5.2 ECU but for simple stuff it works. It is what Steve Wong uses for his commercial chips and the actual map locations and descriptions in the data files were co-opted by the Maxtronic/MaxTune product described above. To get any of these solutions working properly with the TPC supercharger you will need to add support to the ECU for a pressure sensor? For the 964 its trivial but for the 993 it will require some custom microcode. And to properly dynamometer tune a Bosch Motronic ECU you need some additional software & hardware that the two above products don't include...

RallyJon

One issue that often comes up with mapping naturally aspirated cars for forced induction is that there is no provision for > 1 bar absolute with the MAP/MAF sensor and no place on the ECU to map the fuel and ignition parameters. On simple aftermarket turbo installations, you can use a voltage clamp to fool the ECU while you manage fuel (RRFPR) and ignition (external box that retards--like Split Second) externally. But again, that's hack central.

So can you reprogram the stock ECU so it doesn't throw a fit when it sees boost?

993c2cab

What the hell are you guys talking about?? you put it on and go fast.. Right??

Denise993

You took the words right out of my mouth!

Marlon

...let's see...100 HP to the rears...10K bucks. That's only 100 bucks per HP - that sounds like a pretty good deal?

TheOtherEric

Just to bring this thread back: I spoke with Todd at Protomotive, and he has reprogrammed a number of ECUs to avoid use of the piggyback ecu / 7th injector TPC setup. So there's a pretty inexpensive solution to avoid the piggyback ECU. He said it's around $525 for the programming, and you'll need new injectors too ($500??). You should verify the programming using a good dyno with wideband sensor, but he said he can tweak if needed.

If I were on the fence about supercharging, that would be reason enough to go for it!! I'm investigating his bolt-on turbo systems.

Mark in Baltimore

GT class, here you come!!!

Marlon

Who is 'HIS' bolt-on turbo system???