Stardust Posted 2September, 2013 Report Share Posted 2September, 2013 This has to be one of the best cost breakdowns I've yet seen of a 3.4 upgrade. If only we can get something like this for sub $25k in Aussie land. Am I dreaming? http://forums.pelicanparts.com/porsche-911-technical-forum/768929-3-4l-upgrade.html#post7633210 Link to comment Share on other sites More sharing options...
Jimmy Posted 2September, 2013 Report Share Posted 2September, 2013 This has to be one of the best cost breakdowns I've yet seen of a 3.4 upgrade. If only we can get something like this for sub $25k in Aussie land. Am I dreaming? http://forums.pelicanparts.com/porsche-911-technical-forum/768929-3-4l-upgrade.html#post7633210 Or you can get this car that has had the upgrade rebuild http://www.carsales.com.au/private/details/Porsche-911-Carrera-1984/SSE-AD-149394/?Cr=22&sdmvc=1 Link to comment Share on other sites More sharing options...
Simonoz Posted 2September, 2013 Report Share Posted 2September, 2013 I know a bit about that car as it was built by my spannerman.. Can't believe it hasn't sold for around $50k I been lucky to have had two 3.4 converted 911's, both with the unfairly maligned 915 gearbox. it's a great way to bump up the power and torque. One had 9.8 pistons and was on CSI, the other 10.3 pistons on PMO's. The latter was faster, the former more civilised. Both great fun. Sometimes it seems that carsales can kill a car if it sits too long. Link to comment Share on other sites More sharing options...
Norm Posted 2September, 2013 Report Share Posted 2September, 2013 This is something I am planning to do in a couple of years. I had a quick chat to the engine builder at K Tec here in Perth and he indicated between 15 - 20K. Depending obviously on what exactly I would want for the engine. Does anyone have a price breakdown for Australian delivered parts?? Link to comment Share on other sites More sharing options...
MaxzmusSC Posted 2September, 2013 Report Share Posted 2September, 2013 Not sure how to delete post. Link to comment Share on other sites More sharing options...
Stardust Posted 2September, 2013 Author Report Share Posted 2September, 2013 You need new cylinders and pistons. The 3.4 cylinders bolt straight on to a 3.2 case. Same bore size, different wrist pins on the piston to accommodate a longer crankshaft. Your SC needs to go to a 3.2 short stroke - it needs boring out. The 3.2 Pistons can't be bolted on like above because of the longer stroke of the 3.2. I'm guessing the 3.4 upgrade goes anywhere from 250hp to 270-ish hp if you want to maintain streetability/engine life - and keep the motronic efi. The link I posted shows 275 rwhp. I had a conversation with JustJames once where he said "how fast can you afford to go"? Nice summary is here: http://forums.pelicanparts.com/911-engine-rebuilding-forum/147128-quick-faq-3-0-3-2-upgrades-3-2-3-4-a.html Link to comment Share on other sites More sharing options...
clutch-monkey Posted 2September, 2013 Report Share Posted 2September, 2013 This has to be one of the best cost breakdowns I've yet seen of a 3.4 upgrade. If only we can get something like this for sub $25k in Aussie land. Am I dreaming? http://forums.pelicanparts.com/porsche-911-technical-forum/768929-3-4l-upgrade.html#post7633210 25k for a 3.6 swap? since when? Link to comment Share on other sites More sharing options...
SteamWolf Posted 2September, 2013 Report Share Posted 2September, 2013 I'm not sure $25k for 70hp extra is value for money tbh. Link to comment Share on other sites More sharing options...
Stardust Posted 2September, 2013 Author Report Share Posted 2September, 2013 There are some competitions where you need to stay reasonably within spec - thinking the targas. Link to comment Share on other sites More sharing options...
J.J. Posted 3September, 2013 Report Share Posted 3September, 2013 I'm not sure $25k for 70hp extra is value for money tbh.its not at all. thats why if you want HP, much cheaper to turbocharge Link to comment Share on other sites More sharing options...
Stardust Posted 3September, 2013 Author Report Share Posted 3September, 2013 Sure turbocharging is cheap hp. But, for me, I'm selfish and I'm after power and throttle response. I agree with you that 25k for this amount of power increase is a crazy investment. That's why it's a pipe dream at the moment and why I asked the question about pricing in AU. It's something I'll probably do one day but happy to tootle around in my 3.2 in the meantime. Much cheaper to fix the loose nut behind the wheel. Link to comment Share on other sites More sharing options...
MaxzmusSC Posted 3September, 2013 Report Share Posted 3September, 2013 Great info thanks. You need new cylinders and pistons. The 3.4 cylinders bolt straight on to a 3.2 case. Same bore size, different wrist pins on the piston to accommodate a longer crankshaft. Your SC needs to go to a 3.2 short stroke - it needs boring out. The 3.2 Pistons can't be bolted on like above because of the longer stroke of the 3.2. I'm guessing the 3.4 upgrade goes anywhere from 250hp to 270-ish hp if you want to maintain streetability/engine life - and keep the motronic efi. The link I posted shows 275 rwhp. I had a conversation with JustJames once where he said "how fast can you afford to go"? Nice summary is here:http://forums.pelicanparts.com/911-engine-rebuilding-forum/147128-quick-faq-3-0-3-2-upgrades-3-2-3-4-a.html Link to comment Share on other sites More sharing options...
Simonoz Posted 3September, 2013 Report Share Posted 3September, 2013 Most people wait until a rebuild is needed anyway and then opt for the 3.4 on the basis that its no dearer than a standard rebuild. I certainly wouldn't tear into a perfectly good 3.2 just to give it an extra 200cc, whereas with a turbo conversion at least you can take it all off when you sell the car. I've always found it easier to buy the right car first up, rather than build something unusual that will turn into a money pit. Each to their own, and I admire those who have the skills to make a special 911 in their home garage. Not something I can do unfortunately. Link to comment Share on other sites More sharing options...
Stardust Posted 3September, 2013 Author Report Share Posted 3September, 2013 Sound advice, SimonOz. I share your thoughts about the home garage skills and was just lamenting about that offline. I can't even change the brake fluid Link to comment Share on other sites More sharing options...
Uncle Posted 3September, 2013 Report Share Posted 3September, 2013 Sure turbocharging is cheap hp. But, for me, I'm selfish and I'm after power and throttle response. With a current EFI/ turbo tech there is 100% no reason you can't have both. Link to comment Share on other sites More sharing options...
Jimmy Posted 3September, 2013 Report Share Posted 3September, 2013 With a current EFI/ turbo tech there is 100% no reason you can't have both. Yep your right there Uncle, no lag in mine any where in the rev range. My new sports exhaust has given it instant throttle response and a sound to die for, it no longer has that typical Turbo sound. Link to comment Share on other sites More sharing options...
MaxzmusSC Posted 3September, 2013 Report Share Posted 3September, 2013 "To upgrade a stock 3.0 Engine to a 3.2, you need a special "Big Bore" kit. This kit turns your 3.0 into what is known as a short-stroke 3.2. The stroke remains the same at 70.4mm because you're not swapping out the crankshaft. Instead, you are installing what are known as "Big Bore" pistons and cylinders which are 98mm wide (as opposed to the normal 95mm for the 3.0). These are special pistons and cylinders that were never a factory kit available from Porsche (as far as I know). There is no Porsche part number for these - they are an aftermarket kit available from Mahle. These are also sometimes known as the Max-Moritz kit. They are available in various compression ratios - I have a set that is 10.5 and resembles the original RSR setup in design. These sets are "plug-n-play" and do not require modifications to your case or heads. The piston pin offset in these kits is specifically made to work with the 3.0 crankshaft, and these will not work with the 3.2." Hmm did anyone read this? Same process stated for 3.2 to 3.4. Here I was thinking some special modifications where required and its just a big bore kit with respective 3.0 or 3.2l crank? Lets just throw in cost of headers, cams and tuning for argument sake. Sounds like you could halve that budget provided your not upgrading anything else. Needs further investigation but that's sounds right with other platforms. Link to comment Share on other sites More sharing options...
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