Supercharger installation complete!!
03-22-2002 | 07:35 PM
#1
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 49
Likes: 0
From: Houston
Supercharger installation complete!!
After much messing I finally got my TPC Eaton 90 system with digital black box installed on my C2 with Mass air sensor. The biggest problem was making a good clean job of the hoses wiring, and boots that need to be re-configured. When installing the electronics, I changed back to the stock chip and could not the thing started, if I re-installed the performace chip it would fire up straigh away, confirming that my stock chip had misteriously gone bad sitting on the shelf. After waiting for TPC to send me a stock program chip, I had severe fuel shortage problems and lean running which I sorted by way of a new pressure regulator.
So how does it run??? TORQUE!! massive amounts of it. It's like the car has no power band at all, the torque curve feels so fat at anything above 1800 rpm, you can be in 5th doing 50 and it will pull crazy accelaration when it is booted. Puching through the gears with the blower whine promting each shift is awesome. It's not as fast as a C2 3.6 turbo at the top end, but as a street burner, its truley fast as you want to go. The power is addictive. I drove my mates stock C2 and was amazed at the difference. No running, starting, crawling in traffic etc, downsides at all.
I have many pictures and a good in depth knowledge of installing, diagnosing and trouble shooting this kit on a 964 so anyone who is planning to do it or wants to know the pitfalls and tech tips, drop me a line. It's not that TPC are not helpful (quite the opposite), each installation is somewhat unique and the success of a project like this is dependent on how much you actually know about what the various parts are designed to do, especially when testing / troubleshooting the electronics and understanding how the TPC system accounts for timing retard and fuel supplementation.
So how does it run??? TORQUE!! massive amounts of it. It's like the car has no power band at all, the torque curve feels so fat at anything above 1800 rpm, you can be in 5th doing 50 and it will pull crazy accelaration when it is booted. Puching through the gears with the blower whine promting each shift is awesome. It's not as fast as a C2 3.6 turbo at the top end, but as a street burner, its truley fast as you want to go. The power is addictive. I drove my mates stock C2 and was amazed at the difference. No running, starting, crawling in traffic etc, downsides at all.
I have many pictures and a good in depth knowledge of installing, diagnosing and trouble shooting this kit on a 964 so anyone who is planning to do it or wants to know the pitfalls and tech tips, drop me a line. It's not that TPC are not helpful (quite the opposite), each installation is somewhat unique and the success of a project like this is dependent on how much you actually know about what the various parts are designed to do, especially when testing / troubleshooting the electronics and understanding how the TPC system accounts for timing retard and fuel supplementation.
03-23-2002 | 12:22 AM
#3
Race Car
Joined: Jun 2001
Posts: 3,706
Likes: 9
From: Virginia Beach, Va.
Beetos, Bravo Zulu DUDE! I love it when a plan comes together. 
I'll be in Houston here in a few months...I will certainly look you up, if you're up to it - and I'd like a ride in that beast! ...and of course, a chance to "poke around" your installation a bit.
By all means, provide some pictures somewhere for all of us to drool over...and get some DYNO results!! You know how we LOVE numbers!?
Did you have to have any "meat" taken off your original pistons -or- was the install just a "topside only" endeavor?? I'd be curious to know, as the supercharger installation I originally did on my SC was topside only...later I took things apart and added bigger cams, forged pistons, etc.
Inquiring minds want to know! I'm glad to hear that you took on TPCs idea of a supercharger install vice a few other venues. I hope I didn't steer you too wrong with my advice on a previous topic you started...oh well, I tried.
I'll be in Houston here in a few months...I will certainly look you up, if you're up to it - and I'd like a ride in that beast! ...and of course, a chance to "poke around" your installation a bit.
By all means, provide some pictures somewhere for all of us to drool over...and get some DYNO results!! You know how we LOVE numbers!?
Did you have to have any "meat" taken off your original pistons -or- was the install just a "topside only" endeavor?? I'd be curious to know, as the supercharger installation I originally did on my SC was topside only...later I took things apart and added bigger cams, forged pistons, etc.
Inquiring minds want to know! I'm glad to hear that you took on TPCs idea of a supercharger install vice a few other venues. I hope I didn't steer you too wrong with my advice on a previous topic you started...oh well, I tried.
03-23-2002 | 01:24 AM
#4
Three Wheelin'
Joined: Jun 2001
Posts: 1,639
Likes: 2
From: Just North of "Big D"
Beetos,
EXCELLENT! <img src="graemlins/jumper.gif" border="0" alt="[jumper]" /> I want to see it. If your up in the Dallas area, let me know. Otherwise, I might have to make a trip down there to check it out if you are up for it. Do you plan on tracking the car any? My only concern has been reliability under hard use. What are your thoughts?
Jay
EXCELLENT! <img src="graemlins/jumper.gif" border="0" alt="[jumper]" /> I want to see it. If your up in the Dallas area, let me know. Otherwise, I might have to make a trip down there to check it out if you are up for it. Do you plan on tracking the car any? My only concern has been reliability under hard use. What are your thoughts?
Jay
03-23-2002 | 12:28 PM
#5
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 49
Likes: 0
From: Houston
Guys, see the link for pics!
<a href="http://users.ev1.net/~davmanku/porsche/c2/tpc/tpc.html" target="_blank">http://users.ev1.net/~davmanku/porsche/c2/tpc/tpc.html</a>
Keep you all updated, need to set fuel pressure today.
<a href="http://users.ev1.net/~davmanku/porsche/c2/tpc/tpc.html" target="_blank">http://users.ev1.net/~davmanku/porsche/c2/tpc/tpc.html</a>
Keep you all updated, need to set fuel pressure today.
03-23-2002 | 12:46 PM
#6
Race Car
Joined: Jun 2001
Posts: 3,706
Likes: 9
From: Virginia Beach, Va.
Beetos, as it appears you don't have heat, does the AC still work okay? Just curious.
Also, could you take a minute to answer some of my previous questions?? I'm dying to know what it took!
...after all, you can't just "tease" us and not let us know anything!
Also, could you take a minute to answer some of my previous questions?? I'm dying to know what it took!
...after all, you can't just "tease" us and not let us know anything!
03-24-2002 | 04:04 PM
#7
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 49
Likes: 0
From: Houston
Jeff
This is a bolt on running same compression as stock, limited to 4.5psi with timing retard and 7th injector. Still having fueling problems that I am trying to sort out. Right now, with fuel pressure set at a too high 55psi, and fuel computer maxed out, it just manages to stay rich. Not good. I will probably go to 944 turbo injectors and run a lower pressure / duty cycle. Runs good otherwise.
TPC provide a fiberglass shroud that connects the hole at the back of the fan to the heat exchangers, basically bypassing the old fan. Works same as before. As far as long term reliability, we will have to see. TPC say the timing and fuel curves are modest and designed for longevity..... the jury is still out. Personally, I think as long as the fueling is sorted, it should run fine for a long time. I don't plan to track it but do run hard and call on the torque all the time on the street and highways in low rpm high gear scenarios. Thats why I opted for a roots blower, if I wanted a track motor, it would have definately been a low compression high boost intercooled turbo, can't beet them for high rpm power and reliability.
This is a bolt on running same compression as stock, limited to 4.5psi with timing retard and 7th injector. Still having fueling problems that I am trying to sort out. Right now, with fuel pressure set at a too high 55psi, and fuel computer maxed out, it just manages to stay rich. Not good. I will probably go to 944 turbo injectors and run a lower pressure / duty cycle. Runs good otherwise.
TPC provide a fiberglass shroud that connects the hole at the back of the fan to the heat exchangers, basically bypassing the old fan. Works same as before. As far as long term reliability, we will have to see. TPC say the timing and fuel curves are modest and designed for longevity..... the jury is still out. Personally, I think as long as the fueling is sorted, it should run fine for a long time. I don't plan to track it but do run hard and call on the torque all the time on the street and highways in low rpm high gear scenarios. Thats why I opted for a roots blower, if I wanted a track motor, it would have definately been a low compression high boost intercooled turbo, can't beet them for high rpm power and reliability.
