That yellow Bosch book is a piece of crap considering they invented the damn system.

And, yeah, I might have to chew on own feet when the carbs go on :D

Souk, you should write a tech article to help us understand our CIS cars. :D

What's a good book for working on CIS anyway?

Dan :)

"Black Magic and Witches" By Greenhaven

2002/09 - Paperback
Greenhaven Press
0737713194
$19.95

Dan,

Here's a nice CIS Primer:

http://members.rennlist.com/jimwms/CIS/CIShome.html

There is not one book that will provide you with everything you need to know. When I was learning CIS, Jim Williams and his site were great resources. I don't think Jim even owns a 911 right now (maybe he bought a new one since he sold his car sometime ago. The guys down in Alabama may know.), but he still answers e-mails and seems to be interested in CIS education still.

Also when I was learning CIS, I was told that Ben Watson's book was indispensable. I bought that, and it was not good enough. It was good, just not as comprehensive as I thought it should be (i.e. 911 specific enough).

I have a number of books, articles and correspondences that I have collected, but never thought to put it all together, never had time to, really. Those references and my personal struggle with my CIS taught me enough to troubleshoot my own CIS problems. I might one day put it all together, but not in the foreseeable future. If you are determined, you can find all that stuff on the web. I collected the stuff over the last few years, but it’s all out there to grab in a night’s worth of surfing if you are interested. If I could convince my spousal unit to let me quite my job and start writing stuff and wrenching part-time, I’d put out a book or something, considering the ease of publication these days.

I was going to start a technical series on CIS on GruppeB, but then my workload at home and work got to be prohibative. So it's been bumped down the list :(

Heh. I actually had to look that up to make sure you were kidding... :D

Thanks for the link Rick, that looks pretty good. I'll have to read that tonight. The diagrams are fantastically helpful already.

Souk, I'm sure I'll be learning myself just as soon as I get a pressure tester (and whatever other special little gadgets) so I can properly check everything.

Dan :)

Dan, the 60 dollar JC Whitney pressure tester, a 3mm L-shaped allen (screw the t-handle ones that have the big rubber handle..they won't fit in there), a 4 dollar vacuum gauge and a case of Guinness.

It really is not "black magic," but if it'll proprogate some myth to make people sell their CIS to me so they can got to EFI, OK...it's voodoo. BAD VOODOO. Tear that stuff out of there NOW! Send it immediately to Souk's CIS Safe House.

If you want the large intake runners, you need to work on the 78-79 guys like me...

Dan :)

I offered my CIS off my '77930 and got a few offers. No one ever came through with cash:) Any takers? Now accepting offers at CIS clearing house. Act now before I beat it flat with my BFH:)

Eddy: you thinking of going "big gulp" with your CIS? I thought you were a "no changes" guy...

Ed, you should see pictures of my engine bay...I like simple too :D

Yeah, I'm a big advocate for the stock iterations of the SC engine. More and more I'm hearing the 20/21 cams are the way NOT to go with these motors because of resulting piston-to-valve clearance issues on a stock valvetrain. I think though one has to be careful of that problem only when they misshift or over-rev.

I agree, Ed: certain parts go together well. I have all the necessary items to convert to a big gulp, but when it comes to drilling out my heads, I'm very hesitant. I don't know: 2,300 and 190 hp is about all I can handle anyway. I know my limitations.

My suspension is becoming a whole 'nother ball of wax. Today I had the notion to leave it as is and sell all the parts I've accumulated, including trading the 15x8 monster wheels and tires for a set of 15x7s like I had earlier. To say the least, they're mighty choice. Hmmm...the jury is still out. :confused:

Jury's back in. Gosh darn it looks "mean" with those big wheels and tires...:D

Ed: sent you a PM. SmileWavy

It's a little disingenuous posting a pic of your admittedly simplified SC and as far as I can tell stock carerra and asking me to choose. Take the cruise and A/C off, <strike>backdate</strike> remove the heating, then tell me which one looks cleaner. :D

By the way, what is this simplified aluminum airpipe? You mean the intake runner with the little platform on it?

quick hijack...

got the anderson book and that little spiral bound buyer's guide... bought a car with all the updates that it suggests, and then found out about the larger 78-79 runner thing.

here's the question: my airbox has phillips screws in it, which is (from what I've read) supposed to signify the newer airbox with the cold start manifolding in it. if that's true, would the outlets be smaller for smaller runners or what? do you have to change runners for the newer box? is there a performance gain, then, to go back to the older box?

where is my thinking wrong?

thanks
doug

btw it runs great. the cis would have to disintigrate and fall off the car for me to replace it with something else. 30mpg? 15.1@94mph? yes, please! it should only get better with the test pipe and dynomax exhaust i bought at hershey.

I'm not sure but from what I've been told, late model Euro cars such as mine have the larger runners like the 78-79 models. I have the late airbox (philips head screws) too.

I have just built a new 2.7 and I am running a CIS. It is going into my 1966 911. my reasoning is reliability, cold start and the weather I deal with in Canada. Great system when cams are correct, pistons are correct, and mixture is correct. Set it- forget it. As far as beauty I would agree the airbox is an eye sore but aesthetic faux performance covers are available to replace the snorkle. and you can even get red straps! wowow wee wah! The original engine was replaced before purchase and I have always wanted a R or S style 2.7 in an early 2300lb car. This is a sports car.

Toronto,

Glad you like it. I've had a combined 31 years of trouble free CIS operation on 2 cars w/ that system. The last 2 years I've had problems w/ the one on my '77. W/ help from some board members I feel I'm getting close to getting it back to normal. Right now it looks like it was a combination of a bad WUR and a vacuum leak.

BTW where are you in TO?

As of yesterday, I have a complete CIS system off of my 77 for sale with spare accumulator, fuel pump, filter, etc. the car ran awesome and was well sorted but is getting cams, different pistons, and webers. This was removed yesterday, get it while it is fresh.