3.0SC CIS in a 914, Options? Advice? Options

[Justinp71]

I tore the CIS off and put on Webers for my 3.0 /6 conversion. It sounds better, looks better, performs better, easier to work on, and makes the conversion itself a lot easier with fewer electronics and sensors. But your MPG goes down and fuel smell is indeed an issue. I don't care about MPG but sometimes the fuel smell is annoying. Regrets? None.

(IMG:style_emoticons/default/agree.gif)

Not everyone does, but I loved my car with the 3.0 and webbers. Fuel smell is bad on cold start and I was able to lean the idle so its not too bad there. Also leave the top on until after you back out of the driveway helps. Freeway mileage on mine was around 20, 23 at best.

I admit CIS is a reliable system if it all works right. But man with webbers, 964+ cams and headers a 3.0 914 is a screamer. I actually lapped a 81 CIS 911 at thunderhill in about 10 mins on the track.

[Justinp71]

As for the oil cooler, if you are going to track it you will need real good cooling. The factory GT style setrab cooler mounted up front along with the engine mounted one kept me around 180-190f on the street even on the hot 100f days in sac. On the track I'd get up to 240f in a 20 min drive session.

[mepstein]

" I would buy the engine for the engine, not to save money on an oil cooler."

Its obviously not the cost of the oil cooler but getting one to work without having to cut the car for the engine or the cooler.

I'm wondering what cutting up your talking about. I just put a front cooler in my car. The only cutting was one inch holes run up the longs under the sill. I used the stock holes on the front trunk. The whole system cost around $1k. $500 for the setrab cooler with fanpack and 500 for 30 feet of braided line and AN fittings throughout.

[Jeffs9146]

I kept my motor almost stock and in California I have never had mine heat up enough to need an external cooler. I have even driven 1500 miles with no problems.

I don't know about Atlanta though.

[gandalf_025]

Wife's car has a 3.0 with CIS.. Never had an issue with the way it runs.
High compression JE's and slightly more cam..
Engine was built to pass California Emissions, which it did.
Car came back here to have a 3.6 put in and I bought it.

Good Donor motor............

[dflesburg]

my advice, buy the best car you can and drive it for a few years, all the while saving the money you would spend on fixing it up, say $300 a month... after four or five years sell the first car, buy a better car with the money plus the savings, then drive that car, rinse and repeat.

You will never make money fixing up a car and then selling it...

You can always buy a car someone else did for less than they have in it.

[dflesburg]

$300 a month for 30 years is $108,000

all the while you would be driving your car instead of laying under it learning to weld, fab, paint, fix and repair, etc....

(you asked for advice... )

[maddin]

I'm looking for information on dropping a 3.0 SC CIS-injected engine into a 914.

What's needed for the wiring? Other parts required? Impressions?

What did you use for heat exchangers? Did you have to add an external oil cooler? Front mounted cooler or fan-cooled mounted elsewhere?

Thanks.

I'm in the process of putting a 3.0l in my car. I bought a car (roller in very good condition) from one of the members here that had a 6 in it before so all the conversion parts came with it (oil tank,tins,gauges etc) Still needed shiploads of small parts (which cost a fortune in postage)
Bought a 78' 3.0l CIS engine local for a good price ( had been out of the car for a few years,untested,condition unknown).

Will need external oil cooler because of the high temps in summer here in Australia.
Got about a third of the parts I need for a 5 lug conversion,not including the wheels.
Not planning on heat exchangers but will need some sort of demist for rego.
Finally decided to get the engine rebuild properly,dumping the CIS and getting an ECU instead,hoping to get the car on the road by the end of the year.
Everything seemed to be pretty straight forward but it took much longer than I anticipated and I don't even want to talk about the costs.

Don't know how much you can do yourself but I have limited skills and neither the proper space nor all the tools you need for a job like that so I have to tow the car to places (which costs more money if you don't own a trailer) and rely on help from friends or pay professionals.
Regrets? No!...been a steep learning curve though.
If I'd be in the same situation I was 18 months earlier (before I bought the car)
I'd prepare myself much better or buy a car that is on the road already!

Back then there were a few 6 conversions for sale in the low to mid 30's,ready to drive...I'm well past that already,and mine is nowhere near ready!
I had no idea what I was getting into.
Changed directions so many times,it all costs time and money BUT
I absolutely love the car and can't wait to drive it !
Good luck!

[Jeffs9146]

Here is the part number on the back of the intake.

[Justinp71]

...

[Justinp71]

3.2 W/pmo's... (IMG:style_emoticons/default/wub.gif)

[EdwardBlume]

I'm kind of having the same issue. I want more than a 2.4 T, but don't want to cut the car....

[Justinp71]

I'm kind of having the same issue. I want more than a 2.4 T, but don't want to cut the car....

If your not going to track it I think an oil cooler below the rear trunk would work. Jeff also states his 3.0 didn't need an external oil cooler, I believe that as mine only needed it for the track.

[RickS]

Have a 3.0 and was talked into Webbers and selling the CIS. Also have an 82 SC with the same motor with CIS. The performance of each is not night and day even in the lighter 914. The mileage difference is noticeable and had to install an exhaust fan in the 914 berth which runs 24X7 to keep gas fumes out of the house. Webbers are sexy and have a great induction noise, but if I had it to do over again, I would have kept th CIS.

Throttle linkage had to be modified, tach had to be changed from mechanical to electronic. Have the real deal 914-6 HEs and added a front oil cooler which does its job.

You may also want to consider upgrading the brakes if you haven't already.

[Jeffs9146]

Here is a link to my 3.0L photos
Conversion Photos

[GTSandberg]

Here is a link to my 3.0L photos
Conversion Photos

Link does not work anymore. Very interested in seeing them! Creative solution!!

[JmuRiz]

As much as I like the 'cool factor' of carbs, I LOVED how easy it was to start the '74 911 with a 3.0 CIS installed. Easy start and no gas smell.
Naturally I didn't have the same emotional connection to it....I'm a glutton for punishment (IMG:style_emoticons/default/biggrin.gif)

If I could get that out of the 914 and 356, without spending a combined $10k on EFI, I'd be a happy camper.

[GregAmy]

CIS was an excellent system, as long as you kept it clean. The hydromechanical aspect could make some peoples' heads spin, but it was a really efficient, simple, and effective system.

How many Rabbits, Sciroccos, Audis, Mercedes, Volvos, even Ferrari and Lotus had K-Jetronic?

But leave the gas cap off of a Rabbit and let fuel tank rust get into the system...you're toast. Exactly how my dad killed my '84 GTI.

[mepstein]

It also doesn’t like to sit unused all winter or for long periods.

[sixnotfour]

Here is a link to my 3.0L photos
Conversion Photos

Link does not work anymore. Very interested in seeing them! Creative solution!!

2 years ago...

Jeff Tucker (jeffs9146) has passed away