Yeah, Marco began as a car mechanic and later he became an auto trader. Then he focused on older cars. He fell in love with 5cyl. Audis, began tuning them and ended up to 1/4 mile racing. That's why his nick name "5cyl Marco". Afterwards he built an Audi 80 type B2/type 81 with a tuned 1,8t 20V 4cyl. Turbo engine and others. Now he's trading historical vehicles from the 60 up to 90s, in his channel he's showing the projects. He focuses on low budget cars to buy them at a low price and freshing them up, bringing them back to road of possible (some not) and selling them. For the last three years he
started a video series called "Prüfstandstag" (dyno day, every friday in his workshop called "
Halle 77" located in Dortmund) dynoing customer cars and showing them in the videos. The series is pretty successful and his community is growing more and more. Very earth grounded and sympathic guy. I like him.
The thing is - he hated the CIS system before, he admitted not to fully understand the CIS system. Now over the last years he's getting more and more knowledge of the system especially while dynoing all kind of these cars as well, like 80s Mercedes, Audis, BMWs and others. So it turned out that the CIS Audis almost all never had their specified hp, only a few cars reached almost the hp they should have. But some other CIS cars (no Audis) did reach their hp. He blamed the CIS system earlier, but now he's getting more and more control over it and he's changing his minds on the system. Several people shared their knowledge as well with him, this boosts him as well. He owns beside the 924 turbo also a ROW 911 SC from '79. He loves the design, but he's not really confident how the car rides. I hope he's gonna take care on it later and not sell it, because it ties up a lot of money.
Conclusion is for me as well more and more for Marco: The CIS is far better than it's image on street cars, not for racing cars indeed. The cars lacking on so much issues. That's also my message - if there's problem on a CIS car - you can fiddle a faulty CIS car to a "good" ruuning car again, but then it still suffers on the previous problems, but those have been hidden. The real problem is still not solved!
A bad cold start might not be an issue in Florida or Arizona, and top end performance is also mostly not a real problem unless you go with the car on a race track ... and fuel economy is also for some Porsche onwers not really an issue. But here in Germany we currently pay for a gallon gas more than 2€ per liter, which is more than 7$ per gallon (premium gas 98ROZ / 93+ MOZ USA)....so basically double the price than in the US, therefore we care about on mpg and performance... call it as a need for efficiency...
Did you already got the workshop manuals from Porsche? They're avaialable on the net...
I recommend the two following books for every SC owner:
1.
HAYNES Repair manual Porsche 911 SC
2.
Bentley Service Manual Porsche 911 SC , unfortunately pretty expensive
Both do not really cover the CIS and how to adjust it, this makes Kurt from Kassik ATS far more better, but especially on the first one you get far better exploded drawings from every aspect of the car and it lists all the variants of the cars. The second is also very detailed and more to read, and it covers more the details of CIS, but as the first one it also focuses on the US cars and nnot the ROW cars unfortunately.
Thomas