2.4 CIS engine in 911 SC body

[radobard]

I have a 1973 911T 2.4 CIS engine that I want to put in a 1979 911 SC coupe body. What modifications are expected in order for this to work.

Roland

[Trackrash]

I have to ask why? Your motor is probably worth as much, if sold, as a proper 3.0.

[radobard]

The 1979 SC that I have does not have a motor nor transmission. I have a friend that is giving me a super deal on a 2.4 CIS motor. If I had a 3.0 motor then it would be the motor that I would use.

Roland

[Jubbie]

I put a 78' Carrera 3.0 in a 74' 911, so I had the opposite but similar experience. The two things that pop back to me are the electrical connection to the engine is different and the fuel lines were too. I had to do a fair bit to adapt the engine wire loom to hit the right pins on the car. And my fuel lines terminated different.

It is not impossible at all, you will just have to stare at the wiring diagrams for both engine and car and see the path to make it work.

Did you get the CD box from the 2.4 (or did a 2.4 even have a CD box, I don't know). I would make sure how the tach ties in on the SC. If it does at the coil, then you should be fine.

Also you may want to make sure your oil pressure gauge is compatible with the sender. I had that problem.

[timmy2]

The engine wiring for a 73.5 CIS is very different from a '79. The 14 pin plug connector will need to be reconfigured for the alternator wiring to work among other devices. You will need the 3 pin CDI as well.
Definitely not plug and play.
Configuring it to work with the '79 fuse panel and electrical system is possible with a custom engine harness.

[radobard]

Thanks Guys, I may try to search for an engine swap before I try to tackle this project. If I can't, then I will be needing all the advice I can get. Again, thanks.


Roland

[boyt911sc]

Originally Posted by radobard

The 1979 SC that I have does not have a motor nor transmission. I have a friend that is giving me a super deal on a 2.4 CIS motor. If I had a 3.0 motor then it would be the motor that I would use.

Roland

Roland,

My guess is that this is your first 911 (?). Rather than install a smaller and older motor in your roller that would require some conversion work, why not take the easy and convenient path? Look for a good and decent running 3.0 liter SC engine and 915 transmission to put into your car. Overall, you'll be happy with a bigger and livelier engine but would cost you a little bit more. So it is up to you to decide which direction is applicable and practical in your case. Take your time.........

Tony

[LakeCleElum]

Roldand: Besides the concerns voiced above, are you aware of the potential EXPENSIVE oil pressure issues with a mag case engine? (I have one sitting in my garage).

What is the condition of this engine and why was it removed? Mine ran perfectly, but oil pressure dropped to almost zero when it was idling in hot weather. To repair, I could have spent $8-10K doing the assembly myself.....

Even if all of this goes well, you have really hurt the resale value of the SC.

You'll all have to go with longer exhaust studds if keeping the SC exhaust........Do your research carefully.

[radobard]

Thanks guys, you have given me a lot to think about.

Roland

[theiceman]

Originally Posted by LakeCleElum

Roldand: Besides the concerns voiced above, are you aware of the potential EXPENSIVE oil pressure issues with a mag case engine? (I have one sitting in my garage).

What is the condition of this engine and why was it removed? Mine ran perfectly, but oil pressure dropped to almost zero when it was idling in hot weather. To repair, I could have spent $8-10K doing the assembly myself.....

Even if all of this goes well, you have really hurt the resale value of the SC.

You'll all have to go with longer exhaust studds if keeping the SC exhaust........Do your research carefully.

78 and 79 is thin flange exhaust..