MAG58 Posted July 27, 2009 Share Posted July 27, 2009 This is an awesome project! Couple questions though. It seems as if you have the single cam engine in the first pictures but it looks like the twin cam motor in the CAD and on the engine stand, so which one is it? And you wouldn't happen to know how much the twin cam motor makes over the single cam motor for those big cylinder head? Quote Link to comment Share on other sites More sharing options...
tonycharger72 Posted July 29, 2009 Share Posted July 29, 2009 I think all those Porsche Motors are single cam? they just changed displacement throughout its life, like from 4.5 to 4.7 to 5.0 (something like that), How are you going to do the gearbox? just make a custom bellhousing and throw in a T56 or you going to keep the transaxle - now that would be a project ! I have always wanted to know this after seeing an episode of Top Gear where J Clarkson purchased a 928 and the engine started to let go, how does not having bore liners effect things? Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted July 29, 2009 Author Share Posted July 29, 2009 Good eye. My engine is a 4.5l 16v single cam from a 1982 928. The other engine on the stand is my buddy's 5.5l stroked dual cam 32v which he is building at the same time as me. The reason for the complicated exploded diagrams was that I was highlighting the difficulty of adapting the Z32 transmission to the 928 block. I want to use the Z32 clutch and flywheel too, which need adapter plates to work. The bores are nikasil coated, which greatly helps any wear issues. Quote Link to comment Share on other sites More sharing options...
m4xwellmurd3r Posted July 29, 2009 Share Posted July 29, 2009 from what it looks like the 4.5 and 4.7 are SOHC, and the 5.0 and 5.4 are DOHC but it also looks like europe got a 4.7 DOHC engine. anyways, his cad shows a DOHC engine but his engine is a SOHC He's making a custom adaptor with adaptor plates to mate a 300ZX flywheel and clutch to the porsche engine. as for Clarksons 928, his porsche was just in very poor shape. Quote Link to comment Share on other sites More sharing options...
(goldfish) Posted August 3, 2009 Share Posted August 3, 2009 Makes me ask why the poor 928 got it's guts ripped out. I have a soft spot for those guys. Quote Link to comment Share on other sites More sharing options...
RUSSJZ-ZED Posted August 10, 2009 Share Posted August 10, 2009 Just noticed this thread, I'm on a course using some of what you started with, (There is no Datsun content whatsoever.) I've pulled the engine from a 928,( here's where we part company) I've dumped it! As other people have mentioned, Even know it is alloy, it is HEAVY! I'm now installing a toyota 3UZ 4.3 litre from a 2002 Lexus 430. The Toyota V8 including the 5 speed auto, weighs about 50 pounds lighter than the Porker engine on it's own Also removed the torque tube and transaxle, (leaving the Weisach rear suspension) tunnel will be "expanded to fit the 5 speed auto. The end result should be lighter, faster, more economical, more reliable, and a lot less expensive to fix. (engine mounts not completed yet, It's not sitting quite level) Quad cam, 32 valve, Vvti, Love those Toyota engines! Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted August 12, 2009 Author Share Posted August 12, 2009 Looking good! That should be great fun. Yeah they are fairly heavy! Although I think getting rid of the power steering pump, compressor, and air pump will really help. Goldfish, don't feel too bad. The 928 is getting a brand new 5.5l stroked turbo'd engine put back into it. Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted August 19, 2009 Author Share Posted August 19, 2009 Made some progress this week! I pulled the L28 and now have an empty engine bay. Time to start designing the mounts and adapters. I'm wanting some sort of semi solid mount, but with decent vibration dampening. This initial design has a 1/2" thick rubber pad on the 2"x8" mounting plate. Quote Link to comment Share on other sites More sharing options...
Leon Posted September 21, 2009 Share Posted September 21, 2009 Very nice! Looks like you're doing some excellent work there, the CAD definitely helps on a project of this magnitude. Isn't the compression ratio fairly high on these engines, something like 9.5-10:1. Any special precautions to prevent detonation? Quote Link to comment Share on other sites More sharing options...
yetterben Posted September 21, 2009 Share Posted September 21, 2009 This is sweet man.....although the only engine worse than the 6g72 for timing belt issues is the 928 keep an eye on that belt often. Quote Link to comment Share on other sites More sharing options...
neotech84 Posted September 24, 2009 Share Posted September 24, 2009 WOW I have to say great work with CAD and very original swap! Just an idea with your manifold rotation, just cut the flange off and rotate the manifolds and weld on in the forward position. If they can't just switch sides. Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted October 13, 2009 Author Share Posted October 13, 2009 Provided it clears the steering rack and I can relocate the alternator, I'll be able to simply bolt the headers on backwards and mount the turbo in front of the motor. The CAD is definitely a huge help. Solidworks is a dream to work in, especially 2009... I hope to go down to Houston this weekend and do about 20 hours of work on mounting the engine. The tranny adapter needs to be machined, motor mounts cut and welded, and the engine hung in the bay. Quote Link to comment Share on other sites More sharing options...
Kirby260 Posted October 18, 2009 Share Posted October 18, 2009 Provided it clears the steering rack and I can relocate the alternator, I'll be able to simply bolt the headers on backwards and mount the turbo in front of the motor. The CAD is definitely a huge help. Solidworks is a dream to work in, especially 2009... I hope to go down to Houston this weekend and do about 20 hours of work on mounting the engine. The tranny adapter needs to be machined, motor mounts cut and welded, and the engine hung in the bay. Oh man. Want to share your part files for the chassis/engine bay, it would save my life doing my engine mounts for my swap Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted October 19, 2009 Author Share Posted October 19, 2009 Yeah we could definitely share files. Are you working in Solidworks too? Mine are dimensionally accurate for the most part, but I wouldn't mind if someone added to them. Email me at andrewmccalip@gmail.com. Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted October 20, 2009 Author Share Posted October 20, 2009 Something that has probably never ever been done, a Z32 tranny on a Porsche 928 block. She fits like a dream. This weekend I finished the adapter plate as well as steel engine mounts. Next time I'll hang the engine in the bay and weld everything together. Quote Link to comment Share on other sites More sharing options...
PanzerAce Posted October 21, 2009 Share Posted October 21, 2009 Any chance you'll make the files available to get the adapters made up for this when you're done? This seems like it could be a fun little swap, especially since I've seen a bunch of 928s in yards... Quote Link to comment Share on other sites More sharing options...
softopz Posted October 21, 2009 Share Posted October 21, 2009 NIce work keep it up and keep us updated for sure Iam definatly subscribed. What do you have left now motor mounts, tranny mounts, driveshaft? What differential setup will you go with this swap. I dont know if this has been asked but whats hp/torque out this motor in stock form? Quote Link to comment Share on other sites More sharing options...
sweetleaf Posted October 21, 2009 Share Posted October 21, 2009 Finally someone found a use for 928's lol. Having raced/autocrossed just about every porsche out there. don't get me wrong, they're a different animal. Extremly fun to power through corners. When they came in the shop, it was another story. Everybody avoided them like a plauge. The electronics, it was like Lucas all over agin with the Jags. Lol I do love a challenge though. BTW. ?If this post make no sense I'm a couple cases past. Quote Link to comment Share on other sites More sharing options...
G Man Posted November 6, 2009 Share Posted November 6, 2009 I know of a bunch of 928 owners ( myself included ) that would be very interested to see your 928 stroker turbo project and any info you can share about the project. Quote Link to comment Share on other sites More sharing options...
bcdavis Posted November 7, 2009 Share Posted November 7, 2009 Yeah, I am one of the crossover people also. I had a bunch of Z's, and also had a 928. So I am very interested in both projects! A bunch of people from the 928 forum are following this thread with interest... Quote Link to comment Share on other sites More sharing options...
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