[162SPM]

Hi all, I'm gathering all the bits I need for a full-on 968 NA motor. I have been building 944 E-Production 8V motors for years, now stepping up to big power, 350hp is expected. 

 

I found an unmolested donor from a low-mile Cabriolet with an automatic transmission, perfect grocery getter! 

 

The block is being bored to 105mm and getting Nikasil. Carillo 12:1 pistons, Pauter rods, dry sump. Above that are the stock valves with solid lifters, stiffer springs and massive cams driven by two gears, eliminating the Variocam altogether. Going into that will be large ITBs and custom injectors. All of this will be told what to do by an ECU Masters brain, power distribution and programmable 7" dash. 

 

I'm not a know-it-all and don't claim to be.  My only experience with transaxle cars has been stripped down racers, so my involvement in this forum will be pretty narrow. 

 

After looking very closely at the 968 cylinder head, I am again impressed by Porsche's design and engineering. Very cool that they can improve so much on an existing(old) block design.

 

This motor will be going into a late-model 944 chassis with a lot of previous upgrades. 

 

Once I start assembly I will get some posts up, Cheers!

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[94SilverCab]

Welcome,

 

Pete Fitzpatrick at RS Barn knows more about wringing HP out of these engines than (probably) anyone on Earth. You might try pinging him, but I'm not sure how much of his development he is willing to share. 350 HP at the engine is very doable, if you have the $$$.

 

Regards,

 

Jay

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[162SPM]

Thanks Jay, I'll try to reach out to Pete. Over the past few years I've gotten help from Jon Milledge, Mike Lindsey, Michael Mount, and many of my fellow racers. Recently, however, I've found a friend in Kip Van Steenberg, a very experienced S2 racer (National SCCA Champion) and serious engineer. He has basically handed me his research and development. Top that off with some really great parts and sources. 

 

I'm still waiting for a few items, then assembly will start, stay tuned....

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[Cloud9...68]

Best of luck with the project - it sounds really cool.  I tracked my 968, which I had converted to a still-streetable track car, for a number of years, before going off the deep end and buying a Radical SR3, which makes the 968 (and most everything else on four wheels) feel like a Buick Roadmaster.

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[162SPM]

Thx Cloud 9. I'll keep us posted as well as I can.

Back to my original post, this will be a full tilt 968 motor in a late model 944 race prepped chassis. Original tub, fiberglass everywhere, lexan, suspension, brakes, 985 slicks, etc.

 

Cheers

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[Rap]

Pete built the engine for my 968 race car. Ask him about his fire hawk.

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[162SPM]

Here's the latest. The bottom end is complete. Excellent bearing clearances, everything weighed and balanced, rings gapped at .020 top and .025 2nd (Carillo's advice). Also these are gas-ported pistons, not the rings. I had to remove some metal from the dry-sump oil pan because the con-rod bolts hit the scavenger baffle. This pan was from my last build, which was a 2.5 crank. Longer stroke needs more room!

I am waiting for the head work to be done. The cams won't fit and that kind of machining is beyond me. Also waiting for the ITB setup. Hayward Performance in British Columbia is doing the work. 

I'm considering building an engine stand specifically for our motors, any input or ideas would be appreciated. Cheers!

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[Cloud9...68]

Wow, ITB's huh?  That's serious stuff, and very high dollar.  Sounds like quite the project!

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