Looking for 930 911 Turbo FAQ

[smokindav]

I am having trouble finding a 930/911 turbo FAQ that covers the technical aspects of the cars such as fuel systems, turbos, brakes, transaxles, etc., and the differences in model years.

Can someone point me to some links?

thanks,
Dave

[David]

Here's some data, but I think you'll need to refer to books for detailed info. http://www.911turbo.com/turboclub/history/history.html

Do you have a specific question?

[smokindav]

Originally posted by 125shifter
Here's some data, but I think you'll need to refer to books for detailed info. http://www.911turbo.com/turboclub/history/history.html

Do you have a specific question?

Thanks for the link, but not very detailed that I could see.

Specific questions:

How long did the 930/911 Turbo use CIS and what replaced it?

When did the switch from the 4-speed to the 5-speed occur?

When did the brakes change, and to what?

How many different turbos were used and when? How about aftercoolers?

Were the waste gates all the same?

Oil pressure fed chain tensioners - yes/no/sometimes?

Cam changes through the years - where there any and if so, what were they?

Dual plug heads - did the 930/911 Turbo ever have them?

Thermal reactors or cats - when?

What oil coolers were offerred and when?

When did the displacement increase occur?

Talk to me about clutches - rubber vs. solid.

When did the Turbo S model come out and what was different?

What is a 930S?

What were the different wheel sizes and types offerred from the factory?

And FINALLY, how long does the engine last and how much is a rebuild? I keed, I keed........

Thanks for your time,
Dave

[David]

Originally posted by smokindav
Thanks for the link, but not very detailed that I could see.

Specific questions:

How long did the 930/911 Turbo use CIS and what replaced it?

I believe it was replaced when the 993TT came out in 1994.

When did the switch from the 4-speed to the 5-speed occur?

1989 was the first year of the 5-speed.

When did the brakes change, and to what?

The 78-79 had the first big brakes (917 design) with floating front disks. After that they still had big brakes but without the $400 ea front floating disks.

How many different turbos were used and when? How about aftercoolers?

Not sure about the turbos. Intercooler was first used in 78 and think the first change was in 1990 with the C-2 turbo.

Were the waste gates all the same?

I think waste gates were similar until the C-2 but I'm not sure.

Oil pressure fed chain tensioners - yes/no/sometimes?

I would think they changed in 1984 with the Carreras, but I'm not positive.

Cam changes through the years - where there any and if so, what were they?

I think they were the same from 78 to 89.

Dual plug heads - did the 930/911 Turbo ever have them?

1994 993 Twin turbo.

Thermal reactors or cats - when?

All

What oil coolers were offerred and when? Don't know.

When did the displacement increase occur? 1993 with the S I Believe

Talk to me about clutches - rubber vs. solid. Don't know, but most have probably been changed to spring type.

When did the Turbo S model come out and what was different? 1993 I believe

What is a 930S? Don't know.

What were the different wheel sizes and types offerred from the factory? I think 78-85 was 16x 7 & 8, 86-89 went to 9" rear. 17's or larger after that.

I believe the 86 also had an A/C vent improvement.
The 78-79 have a higher flow CIS fuel head. I believe the 90 and later is a different CIS system also.
The 1980 to 1985 cars were not offically imported. So they're gray market and usually worth less.

And FINALLY, how long does the engine last and how much is a rebuild? I keed, I keed........ It depends of course 0.1 to 100,000 miles or more.

Thanks for your time,
Dave

[javadog]

A few additions and corrections:

The CIS was used through 1994 on the 3.6 turbo. The 1996 993 turbo was the first to use a modern injection system.

Not sure why you want to know about the turbos, intercoolers and wastegates but the 75-77, 78-89, C2 turbo, 3.6 turbo and 993 turbo are all distinct engine "families." Granted, within the middle years there were differences in the 78-79 US cars, the 80-85 euro cars and the 86-89 US cars but, as a whole, they have similar characteristics.

The exhaust system on the US cars in the first few years was different to the euro cars and I wouldn't buy an early US turbo that didn't get converted to the euro style when it was fairly new. The later cars (86-on) had similar exhausts to the euro cars so it's not as big a deal with these. A euro muffler will bolt right on, in place of the US cat/muffler assembly.

The oil coolers were similar to that used by contemporary 911s. For the driving I do, a 28 tube brass cooler seems to work the best.

The displacement started at 3.0 liters in 1975, went to 3.3 in 1978, to 3.6 in 1994.

Clutches don't really have problems in these cars. The rubber center clutch that often failed in the 911 is a different part and smaller.

The 930S wasn't really a US car. Not really worth seeking. The turbo S cars are also pretty scarce. The first one, in 1992 was a euro car that weighed quite a bit less and made more power. Good luck finding one. The later 993 turbo S was sold here and these are pretty expensive.

I would buy one of the many books about these cars. There are quite a few differences, apart from the ones you asked about and they are too numerous for someone who types slowly (me) to list here. They also drive quite differently, so it's hard to say what you'd like better. I have a couple turbos and my favorite would be a 1994 3.6.

JR