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Chris White’s 968 Project

Those that know me know I tend to get a little carried away with Porsche projects – and in this case I suppose I have to agree with them! I happen to really like cabriolets, there is something about the top down driving that I really enjoy. I have had several different cabs and the current Porsche I have is 1994 968 cab. It’s a fairly uncommon model, for the entire 968 model run only 4665 were imported to the US and Canada and less than half of those were cabs.

In stock form is had a 3.0 liter 16 valve normally aspirated engine rated at 236hp. I drove this one around in stock form for a couple of years before succumbing to the urge to ‘make it better’. I have been building performance engines for a while so, at least to me, it only made sense to build an interesting engine for the 968. 

Very few stock parts left! The stock block was modified for lower compression pistons, custom connecting rods and a windage tray. The cylinder head has been ported with custom high temp alloy valves, custom springs, Titanium retainers and a custom designed cam drive system that allows for adjustment of both cams. The induction system has been completely changed with the addition of a Garret GTX35R turbo, custom intake & exhaust manifolds, intercooler and piping, Tial wastegate and blow off valves as well as many mods to support the turbo installation. In addition to that the engine management is being handled by a Haltech ‘standalone’ computer system. I have built similar race engines that have made 596hp at 15 psi of boost –and they are capable of running over 20psi of boost.

This engine was first fired up in early January and the whole project is on track to be complete for spring. Hopefully it will be at many CNY events this year. I’ll be the guy smiling behind the wheel!
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Here is the front view of the engine – since the intercooler is now in the way of the stock latch I had to design and CNC some billet aluminum hood latch supports. You can see  a lot of custom parts that were made to get all this stuffed into the engine compartment.

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Side view – the gauge in the lower right corner reads the fuel pressure which is adjusted with the red fuel pressure regulator right next to it. The ignition coils are located behind the engine on an aluminum support. The ignition system is now a coil pre cylinder design.

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The big picture…a lot of stuff!

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This is what the new engine management system wiring looks like inside the car…its not of the faint of heart!!