924Board.org

[Swakefield]

Okay so I have a 1980 Porsche 924 with the NA engine. BUT I want a turbo. What parts would I need to swap it over to a turbo'd Engine? I have the CIS Bosch K-Jetronic Fuel System so im not sure how that would work with a turbo? Im looking to stay as close to stock as I can.

As far as I know I need the 931 Exhaust Manifold, and what else? Are there any differences in the Camshaft or the head itself between the 931 and 924? As far as I know, there arent. Thanks for the help!

[scriblz7]

you are better off just selling your car and buying a turbo.

differences include but are not limited to: pistons, head, exhaust, turbo itself, oil cooler, intake, transmission, torque tube, fuel metering head, fuel lines,
_________________
Riley
79 924 n/a with gt body
15 VW GTI

[Rasta Monsta]

This is all well documented. You should play around with the search feature and see what you come up with.
_________________
Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[daniel]

There was a picture floating around a while ago that was an advertisement for the turbo back in the day and it showed all the components Porsche changed in order to turbo charge the 924. It looked to me like Porsche changed most of the mechanical components in the car.

As mentioned above, sell and buy a factory turbo. You'll save money and you'll be driving your car straight away
_________________
Over the top of skyline, total brake failure.... hit the wall at over 200 kp/h at the dipper, so anyone who has to brake for the esses is a pussy.
1977.5 Race Car, CAMS Group S Spec
1989 944 Cabriolet

[morghen]

I started doing the same about 7 years ago
Not worth it...you spend (much)more that what you would pay for a factory turbo car and in the end you have problems with MOT, and if you want to sell it its going to be weird as no one will care that you did a nice job, the VIN says that its a NA.
Sell your NA, save up and buy a turbo but be quick about it as they are getting more and more expensive.
_________________
Supercharger and EFI kits
https://www.the924.com

[fiat22turbo]

The bare minimum you'll need to turbo your NA is a turbo exhaust manifold, turbo, a turbo fuel distributor and a turbo distributor.

The stock turbo manifold won't fit the NA head and the Turbo head won't work on the NA block without changing the pistons and you'd need the Turbo intake as the mounts are slightly different at the head.

So you can do the following:

Try to find one of the old BAE Turbo kits that were sold back in the day before the 924 Turbo came on the scene.

Build a turbo exhaust manifold of your own.

Either way you'll need to build intake tubing, vacuum lines, plumb in the fuel distributor, build a downpipe, coolant and oil hoses and then you get to tune it to work safely without burning pistons, etc.

You could try converting to EFI which will reduce the need for a 924 Turbo fuel distributor and allow more finite control over fuel and ignition, but the parts needed and time needed to tune will be increased as well.

The amount of parts and fabrication needed to make all of this work is fairly large and in the end you'll have a 924 NA with an aftermarket turbo solution that will always be viewed sideways by potential buyers due to the potential for failure or poor build quality.

If you're doing this for fun and don't really care about resale or reliability, then by all means have at it. More than one 924 NA has been converted to turbo or supercharged status just for the fun of it with varying degrees of success.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

[nickthompson]

Or you could run a pair of n/a fuel distributors like that one guy did. And plumb the head for extra injectors. LoL

[fiat22turbo]

The turbo distributor is contoured differently internally and draws through the bottom so it is easier to plumb into the car.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)