Adrian Streather has written an article on the 964 Turbo Engine and Engine Systems.
He has allowed me to host this on my site <a href="http://www.porsche964.co.uk" target="_blank">www.porsche964.co.uk</a>

Goto Technical-&gt;Engine and scroll down to 964 Turbo.

Thanks Adrian,

John

PS I am also short of 964 Turbo photos. If you have any good ones go to the Photo Gallery in the Images/Media section and upload yours. Thanks.

<img src="http://www.porsche964.co.uk/images/External%20Parking/964Webbanner60.jpg" alt=" - " />

 

Many thanks to both Adrian and you for sharing this with us. Fantastic info.

 

John M,

THANKS FOR THE LINK!

FOR A TEC'Y, THIS IS A MUST SEE!!!

I imediately noticed for example, the 3.6 has a WUR that adds more fuel on boost (different control presures, thus possably more fuel for other 3.3 turbo owners). And, C2T's have an accelartion enrichment function for pre boost running. The 3.3 & 3.6 had the same Turbo (K27-7200) but that the specials had a bigger turbo (another source said K27-7006 for the S2's)And other cool stuff...

Also: I had heard that C2T's can wast there ignition systems and I see that the 3.6 moved the vac/boost conection to after the throtle plate to pretect it from excesuive presure. A good mod for us 91/2 3.3 C2T's???

Can't wate to read it all...

Keith
91 C2T

 

Fantastic information!!!
Don't know how much time I spend trying to understand how the enrichment system works on the c2 turbos and here it is!

I haven't read the whole thing yet so I don't know if it's allready there, but I have the pin numbers for the different enrichment modes if someone would be interested in building there own fuel enrichment. I could also provide the pin number on the diagnostic plug for reading the duty cycle. But again, it could be there allready.

Thanks Adrian, fantastic stuff as allways!!

 

Thank you Adrian for great information.

The only thing is the pictures are very low in resolutions - hard to be able to read anything on them.

Sonny

 

Dear Sonny,
I know. To do this in high resolution requires a major pdf size file and then people complain about download times. The high res version was circa 8 mb.
The full set up will appear in my book withmuch better images. I only posted this file because of the delay in my book and clearly very few people know the systems and how they work. I wish it was my book but!!!
Ciao,
Adrian.
911C4

 

Dear Keith,
The Turbo S2 was a product of Andial USA not Porsche. The S2 was delivered to the USA as a standard Turbo and then modified by Andial. The control system is the same. This is all covered in my book. I even have the parts list. Other specials again work the same way. This is a technical article rather than a historic one.
Ciao,
Adrian

 

Adrian,

I want, I want, I want your book!

I tought I read back in 91/2 that the S2 package was installed at the factory -or- bought as a kit. Maybe that was part of the propaganda.

I also remember somthing about a handeling package option that was also available factory installed again on the assembly line or as a kit.

Did the S2's have enlarged intake manifold & ports (referenced as different part numbers)? I rember reading this also but one S2 owner who went through a reseal said that he did not think this was the case.

Keep up the good work...

Keith

 

Hey Staffan, what's the pin number on the diagnostic plug??? I was trying to read the duty cycle the other day with a dwell meeter and couldn't get a signal from the plug...thanks

 

Dear Keith,
I do not know your reference about the S2 but it was complete propaganda.
These Turbos had S2 on the delivery paperwork on arrival in the USA. It said option TS2 on the option list "But" this was techncially false. There were only 20 S2s and the conversion was contracted to Andial USA. The S2 package was not installed by Porsche. The S2 kit was available from Andial afterwards I believe. I have no idea how many they sold. You should not get this mixed up with the three engine kits for Turbos which were offered by PAG. They are quite different. We still do not know what the engine HP actually was. Andial never dynoed any of their charges.
On your question on air intake. The intercooler assembly was designed and built by Andial. I would assume that plumbing related to this installation would have been changed to accomodate it. Only the intercooler kit part number is given though.
Hassle Bentley for my book. They are in charge of schedule and publication. The more emails they get the faster they will have to work.
Ciao,
Adrian
911C4

 

Jeff, 19 should be the right pin for reading lambda duty cycle, let me know if it doesn't work I have the wiring diagram somewhere.

 

Thanks Staffan. That was the one I was trying, but couldn't get a signal??? When reading the signal, do I have to ground out the other lead?

 

Jeff it needs some type of reference, grounding the other lead should do it.

But as you can tell I haven't done this myself yet. I don't think you will need any "special" ground, but let us know if it doesn't work, because there are "ground" and "electronics ground", this should be "ground" I think.

 

Pin 10 on the plug is brown (ground).

Thus, 19 to 10 with a dwell meter should give the info available.

I think I read in a bosh CIS book that if it reads around 45% using a 4 cycl scale it should represent a proper fuel mix.

I belive a higher duty cycle up to 75% would be adding more fuel.

Keith

 

John,

Great site for a newbie to the 964 like me..Great info, Adrian.."chapeau"
BTW, do you think traveling 6000 miles abroad to a country you've never visited before, staying in a hotel for 4 days, buying a '94 964 Turbo having only seen it on a website once before, and ship it back to your home country qualifies as an addict to 964's? Oh! did I mention also that I had to sell my 10k miles '97 993TT to buy the 964 T2 <img border="0" alt="[ouch]" title="" src="graemlins/c.gif" /> ..
Thanks for sharing all this info guys.