HoustonZ Posted July 13, 2009 Share Posted July 13, 2009 I don't think I've ever seen this done before, so here goes.... I work at an amazing engineering company with a bunch of car guys who are particularly found of Porsche. We have had three Porsche 928 cars and lots of engines. Recently I was given one from a 1982 928. Its an all aluminum 4.5l V8. The block is massively stout, and the thing is generally built quite well. They used another 928 block for their 1100hp project car... The plan is to turbocharge it with a Turbonetics T04b. The transmission will be a little bit of a challenge. Porsche originally used a torque tube type setup. I'll be adapting a Z32 transmission with a custom bellhousing plate and modified flywheel. Custom rear sump oilpan, motor mounts, and other little pieces will be needed as well. The first step was removing it from the donor car. Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted July 13, 2009 Share Posted July 13, 2009 Ill be following this one for sure! good luck! Quote Link to comment Share on other sites More sharing options...
GrenadeZ Posted July 13, 2009 Share Posted July 13, 2009 oh snap. Good luck mane Quote Link to comment Share on other sites More sharing options...
Drax240z Posted July 13, 2009 Share Posted July 13, 2009 Great idea! Looking forward to following your progress. Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted July 13, 2009 Share Posted July 13, 2009 Interesting! Keep us posted! Quote Link to comment Share on other sites More sharing options...
Magnum380Z Posted July 14, 2009 Share Posted July 14, 2009 sweet ! the 928 is my fav. Porsche i love the sound ! good luck with the swap im subscribing! Quote Link to comment Share on other sites More sharing options...
dhp123166 Posted July 14, 2009 Share Posted July 14, 2009 Wow, that's also kind of cool because the 928 looks (and probably performs) like an s-30 Z on steroids. Quote Link to comment Share on other sites More sharing options...
MikeBZ Posted July 14, 2009 Share Posted July 14, 2009 That should be sweet, all aluminum. It also looks pretty narrow and the exhaust manifolds are low. Should have good clearance all around. Quote Link to comment Share on other sites More sharing options...
GrenadeZ Posted July 14, 2009 Share Posted July 14, 2009 http://www.youtube.com/watch?v=UuUt3WxWiYc&feature=related YEs! Yes! Yes Quote Link to comment Share on other sites More sharing options...
jyz77 Posted July 14, 2009 Share Posted July 14, 2009 wow... cant wait to see it in person andrew ! good luck Quote Link to comment Share on other sites More sharing options...
cockerstar Posted July 14, 2009 Share Posted July 14, 2009 I like the way you think Plus, you can't beat that price on a donor engine! Lots of pics are a requirement for all of hbz. I'm looking forward to seeing how this one is going to fit in. Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted July 14, 2009 Author Share Posted July 14, 2009 Glad to see the interest in it. I was a little bit skeptical at first about the idea, but now I've decided it can happen. Frank, we work on it almost every weekend. Whether its pulling an engine, mocking up parts, or machining, you're welcome to join in anytime Here are the existing exhaust manifolds. I plan on bringing them together in a Y pipe that will collect into the turbo flange. I've started modeling the engine bay and block to get an idea of how much room I have to play with. The initial fit is good, although turbo placement is a little tricky. Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted July 14, 2009 Share Posted July 14, 2009 Have you thought about doing a front mount set up? Can you swap the manifolds from bank to bank and have them point forward? Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted July 14, 2009 Author Share Posted July 14, 2009 We actually had the same idea yesterday. It would definitely simplify piping. As long as the manifolds work with the bolt patterns reversed and they clear the steering rack, it should be fine. That is something I'll need to play around with in CAD to confirm. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted July 14, 2009 Share Posted July 14, 2009 Do you know the weight on the Porsche engine? It's been a long time since I worked as a Porsche mechanic, but I seem to recall those suckers are HEAVY, despite the fact that they're aluminum. I'd also be a bit worried about the Z32 trans holding up. Given any thought to a T56? Quote Link to comment Share on other sites More sharing options...
g9m3c Posted July 14, 2009 Share Posted July 14, 2009 Awesome! Can't wait to see more! Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted July 14, 2009 Author Share Posted July 14, 2009 You're right, they are slightly heavy. The total weight is 550lbs. However almost 100lbs of that is belt driven pumps on the front end. I'm eliminating the AC compressor, air pump, and power steering pump. With other changes, I can get the weight to a reasonable level. The horsepower goal is 500 to the wheels, which is something the Z32 tranny should hold up to. Quote Link to comment Share on other sites More sharing options...
NATURALLYASPIRATED Posted July 15, 2009 Share Posted July 15, 2009 I personally have seen the N/A z32 tranny hold up to 530bhp Im not ure if your using the tt trans or not but regardless they can take a beating.. as well if you are willing to spend the money the newer z32 jdm transmission i think around '99 have harded steel in them not the softer metal parts.. which in return obviously will last longer Quote Link to comment Share on other sites More sharing options...
chrismiller5157 Posted July 26, 2009 Share Posted July 26, 2009 dud thats alsome. i cant wait to see it. Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted July 26, 2009 Author Share Posted July 26, 2009 I've started to model the problem of the transmission. From left to right approximately. Red is the engine block. Blue is the crankshaft. Yellow is the transmission adapter plate. Pink is the crank adapter plate. Green is the flywheel adapter plate. Beige is the flywheel. Orange is the clutch. Teal is the pressure plate. The grey shaft is the input shaft to the tranny. Some of the pieces have been simplified for mockup's sake. I've been modeling for about 12 hours this weekend. Its nice to be working inside on the computer instead of out in the heat. The reason I'm having to make this complicated adapter setup is because I'm wanting to use an existing 300zx flywheel/clutch with the porschecrankshaft, and obviously the two have quite different bolt patterns. If it becomes too much work, I may just cnc a custom billet flywheel. Quote Link to comment Share on other sites More sharing options...
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