Anyone done a 964 Motor in a 85 Carrera?

Joeaksa · 12-27-2002, 05:55 PM

I know that there are loads of people who have done the 3.6/964 motor swap into a SC model 911. Anyone know what the difference is in putting the same motor in a 85 model Carrera?

The SC does not have the notch in the tranny for the speed pickup sensors and does not have the DME fuel injector computer under the drivers seat. Both of these are already on the Carrera.

Does the 14 pin harness need to be changed on the motor or the car side in the engine compartment? Does the fuel injection computer under the drivers seat accept the same wiring harness as the stock unit on the Carrera or does a new harness need to be run through the tunnel? Any fuel system or ignition changes needed?

Appreciate any input here, am looking at doing the swap and curious how much work and time it would take. Have one shop who said that they can do it but it would take a week. If the wiring harness is the same and the gearbox does not need notching, then I was wondering what else was required.

Thx,

Joe

Lothar · Lothar's Garage

CHeck with STeve Timmins @ www.Instant-g.com

Joeaksa · 12-27-2002, 06:36 PM

Lothar,

Would love to but its the weekend and assume that he is not at his place until Monday. Trying to figure out what it takes before Monday.

Thx anyway!

Joe

Kevin Stewart · 12-27-2002, 06:53 PM

it will cost you ten grand. im doing a sc conversion and theres not much difference, you will be able to use your old heat exchangers, you can probably find a motor for between 6-7500, plus shipping, you will need the install kit from timmins somewhere in the 1300 dollar range, and whatever you do with the exhaust, Bill venburg (i hope i spelled it right Bill) has a motor forsale check the 911 parts forum, his is almost complete and he knows plenty about this conversion, and can tell you what parts will be needed to complete it, so the best deal going right now is Bills motor, Have fun, Kevin also i am doing a build up as we go just waiting on exhaust

LeeH · 12-27-2002, 07:06 PM

http://www.vintagebus.com/howto/964.html

Not specific to a Carrera, but good info.

Joeaksa · 12-27-2002, 07:32 PM

Kevin and Lee,

Thanks for the info but so far have not found anyone putting the 964 motor in a Carrera.

The SC does not have the fuel computer under the seat, nor the slots in the 915 gearbox, so hope that these mods are not needed on my car. From the pictures on Thom's site, the brain appears to be the same size and hope the wiring would work. Looks like there are some ignition parts that need to be mounted on the left side and some fuel and oil line mods as well.

Would love to get ahold of Bill! He is somewhere on vacation and not really reachable.

Thanks and hope we can find someone in a Carrera who has done this mod.

Joe

ChrisBennet · ChrisBennet's Garage

You will need to use a 964 DME and harness with the 964 motor. If you sell your 3.2 motor to someone upgrading, they will probably want the 3.2 DME and harness.
-Chris

Joeaksa · 12-27-2002, 08:09 PM

Chris,

Makes sense to me. Do you have any idea if the harness on the 964 DME is the same as the 3.2 version? A lot easier to give the new buyer another harness and use the one in my car and do not have to snake it through the car.

Thanks,

Joe

LeeH · 12-27-2002, 11:02 PM

Joe,

Did you go through www.Instant-g.com ?

Seems they can or have converted Carreras:
http://instant-g.com/Cars/Black85Targa/index.html

Seems like you should be able to get hold of Steve :
Dr. Steven J. Timmins
timmins@instant-g.com
(302)456-0630 evenings/weekends.
(302)559-5905 Mobile

ChrisBennet · ChrisBennet's Garage

Quote:

Originally posted by Joeaksa
Chris,

Makes sense to me. Do you have any idea if the harness on the 964 DME is the same as the 3.2 version? A lot easier to give the new buyer another harness and use the one in my car and do not have to snake it through the car.

Thanks,

Joe

I am almost positive they are different but I'll go check...
Yep, the 964 has 50% more pins on the DME connector.
-Chris

patalive · 12-28-2002, 04:59 AM

Joe, I know the 964 DME is adaptive while the 3.2 is not. It actually changes its profile based on ones driving style. Also, don't forget that the 964 engine has dual plugs, with a primary and a slave distriubtor, which I would imagine would also require a different DME.

Chuck
93 C2

Joeaksa · 12-28-2002, 06:14 AM

Thanks guys! Now I know that new wiring needs to be run from the motor compartment to the interior as well as the dual ignition units installed on the RH fire/fender wall.

Thanks for the help and if anyone has done this on a Carrera, pls PM me.

Joe

Bill Verburg · Bill Verburg's Garage

The closer in model year the donor and donee are the easier the transplant is.

For an 84-86 the harness and brain will need to be swapped but the mounts can be used.

The 14 pin is different for each year. This is the most critical part of the whole job. Not hard just be careful, you just need to match the engine circuits w/ the chassis circuits. On an early car the external vs internal voltage regulator is an additional issue thet I addressed by transplanting the entire fuse panel from a 93 into my '76. For an 84-86 this is not an issue.

The 84-86 also already has the stronger gears , syncros, and notched 915. No mods required. The stock G50 studs on a 3.6 will need to be swapped for the 915 versions(~$20) Use a quality c/pp/tob and you are set here.

Fuel lines on an earlier car need to be run from drivers to passengers side, not sure about an 84-86 but I suspect little change will be necessary.

The heater fan and stock air cleaner can be used if you are willing to give up the useless struts.