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Classic Retrofit Porsche 993 R&D

by | Mar 6, 2023 | Classic Porsche Blog, Project Cars

Porsche 993 C2 Coupe UK

Jonny Hart at Classic Retrofit picked up a pre-Varioram Porsche 993 Carrera 2 Tiptronic Coupe through some trade friends last August. I’ve often thought about using a 993 as a daily driver and I know many of you actually have. it’s been fun to see what Jonny has made of the 993, and how much he has used it when there is also a nicely restored 911 SC, an electric 914 and an electric works van in the fleet.

“Work on the 993 has included an overdue service, a front end strip and rebuild and of course we’re using the 993 as a development vehicle and test mule for our next-generation Porsche electric air conditioning systems,” he says.

“As this car was never fitted with air conditioning, we’ve fitted our full system including our upgraded alternator. This is a harder installation on a Tiptronic as it has an additional transmission oil cooler up front so a second condenser is not possible. Instead, we’re trialling a new-tech version of our single condenser setup.

“Made by a Dutch company, the new condenser is 50% more efficient than the original 964/993 condenser, which is a big improvement. While we have been using twin condenser systems which give massive headroom over the original, a 50% improvement on the original part is more than enough for most users, especially when combined with our new CCU, which is also in testing in our 993.

“Other improvements seen on the test mule include the development of a tightly-packaged combined battery and A/C Compressor mount to minimise the space required by our electric A/C system: watch out for this as a new product. One more product developed for the car is a replacement tweeter mount to fit Focal FN43 tweeters into standard Porsche 993 door cards. This is a great little upgrade for audiophiles and is available to buy now.”

Jonny says that recent road trips to Retromobile in Paris and visits to several UK consultancy clients have shown that, some 30 years after its introduction, the 993 remains a highly capable and comfortable daily driver. While the Tiptronic is relaxing most of the time, the car can still get a shift on when needed. I might need to borrow this one of the days.

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