From: bob
Email:
Date: 1/28/00
Time: 1:15:18 PMThere were several aftermarket turbo install kits for the NA 924. But I believe they are all discontinued. You can find them used if you start searching the internet. Jim Rogers at one time had one for sale, he is listed in the registry. I had a BAE kit which included a turbo, exhaust manifold a wastegate and some tubing. I sold it to a fellow who is running it in a 78 924 with a intercooler and larger throttle body. I personally don't like the kits, the factory spent some time and research developing the turbo 924 "aka 931" and it has many refinements in the engine management system along with upgraded components.
I would say find a factory turbo and start from there, it would be possible to drop a turbo motor into a NA car, but there are suspension issues, driveline and electronic upgrades in the factory turbo that eventually you will want to add to the NA 924. One headache/improvement to the 924 is a weber carberator setup. I don't think it will gain you much HP but it gives the car a different feel.
931's can be found at a reasonable prices but the next problem is the expense in turbo parts, but it wouldn't be any more than what you would expect with a kit. The early turbos 79 and 80 usually come with drum rear brakes and a half vacum / half digital ignition system, don't that let that stop you from buying one if it is at a good price, 944 suspensions are a dime a dozen and it can be fitted to the turbo with a little work. The 81 and 82 cars have the 4 wheel disc and a updated fully digital timing ignition, these are the more desirable cars but the 80 models production excedes the 81 and 82 production so it more likely you will find a 80 model than a 81 or 82. If you are into upgrades you will probably ditch the porsche igintion system at some point, but I think the systems are fine and are very capable of the job. The greatest upgrade to a turbo car is the addition of an intercooler and increasing the boost. You can bump the boost to a certain point without an intercooler but only so far, if you are in warm climate then look into an intercooler. David Frank is installing a 944 Turbo unit in his car and I'm sure he would be willing to discuss it with anyone interested. I'm going to atttempt to reproduce the factory intercooler with mounting hardware. It is a good add-on but the location requires a hood scoop and wil be prone to heat saturation when the car is not moving, so no stoplight drag racing.
More to follow, Keep the questions coming.
Bob
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924 FAQ (Technical)
