Peter M Posted 4January, 2020 Author Report Share Posted 4January, 2020 On 04/01/2020 at 14:37, OZ930 said: Just read this: According to a climate change expert, air conditioners cause bushfires. Brian, I'm assured that since the air conditioners from Australian air cooled 911's only contribute 1.3% towards global greenhouse gases we shouldn't feel in any way obliged to change our ways.... Knock Sensor Locations I find Neil Harvey a bit frustrating. Certainly clever and well experienced from his years at Andial and Performance Developments, but a bit too coy to share information and a bit to quick to tell everyone how he does things better than everyone else for my liking! And some weird fetish for CDI that he doesn't explain very well. However I was reassured when he recently let slip that he prefers to use 964/993 sensor bridges mounted on the underside of the heads on pre-964 engines: http://forums.pelicanparts.com/10690222-post2.html When I decided to do mine that way I was shooting from the hip and it was mostly good luck it turned out OK. Quote Link to comment Share on other sites More sharing options...
Peter M Posted 10January, 2020 Author Report Share Posted 10January, 2020 How Hot Is It? Probably not as much as you think! For the sight impaired, the markings on 3.2 gauges are: Top of first marking - 80 C Second marking - 90 C Third marking - 120 C Bottom of red marking - 150 C See, they don't run as hot as you think! Philbee and Stepo 2 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 12February, 2020 Author Report Share Posted 12February, 2020 Not much happening as I haven't got around to refitting my newly ceramic coated headers so gratuitous photos will need to suffice. Still surprised I bought a red car.... GTP911, Raven, Stepo and 4 others 7 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 16February, 2020 Author Report Share Posted 16February, 2020 Hi Octane Coatings at Drummoyne came highly recommended so I used them to ceramic coat my headers to reduce radiant heat. They recommend their black on the outside and something else that I can't remember on the inside. The turn around was quick and the finish flawless. Got pulled today for breath, licence and logbook check. Cheeky copper said with a grin "Is it quieter on the inside ?" MFX, Dalai and Scott930 3 Quote Link to comment Share on other sites More sharing options...
OZ930 Posted 16February, 2020 Report Share Posted 16February, 2020 Was it the big guy with the beard ? Quote Link to comment Share on other sites More sharing options...
Peter M Posted 16February, 2020 Author Report Share Posted 16February, 2020 8 hours ago, OZ930 said: Was it the big guy with the beard ? Yes, actually. Not one of the usual short guys that the Highway Patrol seem to attract...... Quote Link to comment Share on other sites More sharing options...
OZ930 Posted 17February, 2020 Report Share Posted 17February, 2020 11 hours ago, Peter M said: Yes, actually. Not one of the usual short guys that the Highway Patrol seem to attract...... Same guy that pulled me over for an RBT when I drove up for Cars and Coffee. ”have you had any alcohol today sir ?” ”do you want some ?” ”not so much want, but need” Peter M 1 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 17February, 2020 Author Report Share Posted 17February, 2020 Missus said to me yesterday: "You know those cars that wake you up in the middle of the night because they are so loud that you just wish the driver would crash and die so you can go back to sleep? Your red car is that loud." GULP!😨 Mike D'Silva, OZ930, LeeM and 1 other 1 3 Quote Link to comment Share on other sites More sharing options...
jakroo Posted 17February, 2020 Report Share Posted 17February, 2020 16 minutes ago, Peter M said: Missus said to me yesterday: "You know those cars that wake you up in the middle of the night because they are so loud that you just wish the driver would crash and die so you can go back to sleep? Your red car is that loud." GULP!😨 That's so incredibly funny, I am having issues trying to read this out to my family and not die from lack of breathing while I laugh with tears in my eyes......you obnoxious b#stard..... I was told the same thing by my neighbour sometime in 2004 when I first fired up the Ducati 749s with the Termignoni 'race use only' exhaust pipe one 5am Sunday morning.... Peter M and LeeM 1 1 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 17February, 2020 Author Report Share Posted 17February, 2020 On 17/02/2020 at 19:46, jakroo said: ...... Ducati 749s with the Termignoni 'race use only' exhaust pipe one 5am Sunday morning.... Ah, Testastretta Ducatis, is there anything in this world more magnificent? Still miss my pair whilst conveniently forgetting that I sold them because I was too fat and inflexible to fit . Bought my 749 just for track days. Might be small and cute but is easily the most obnoxious thing in the garage because it's loud and takes a lot of throttle blipping and restarts before it will even fast idle. Think of a 100 rattling dry clutches, it even annoys me! At least with the red car I can drive off immediately. But when it finally reaches 85 degrees and carburates perfectly, the noise it makes on overrun still makes me weak at the knees, bel suono! Can't image ever selling it. Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 26March, 2020 Author Report Share Posted 26March, 2020 It's been a while since we had some 3.2 love: tomo and firstone 2 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 28March, 2020 Author Report Share Posted 28March, 2020 Nice 3.2 to 3.8 engine build. I guess it would have to be at equivalent to $52,000 AUD plus shipping! tomo 1 Quote Link to comment Share on other sites More sharing options...
tomo Posted 28March, 2020 Report Share Posted 28March, 2020 In taking a motor out to 3.8 or 4 Ltr is it a combination of stroke and bore size or do they just stroke it ? Or is it pistons and bore size , To my way of thinking it would have to a combination of both to justerfy the dollars asked. Quote Link to comment Share on other sites More sharing options...
Peter M Posted 28March, 2020 Author Report Share Posted 28March, 2020 Yes, I understand they increase the stroke from the standard 74.4mm to 76.4mm by machining the crank using smaller 50mm big end journals (later GT3 cranks seem a common swap as well) and machine the cases to take new cylinders with 102mm bores (up from 95mm) to get them to 3.8 litres Surely it would be more cost effective to go turbo or use a 3.6 litre engine as a base? tomo 1 Quote Link to comment Share on other sites More sharing options...
TINGY Posted 28March, 2020 Report Share Posted 28March, 2020 On 26/03/2020 at 20:24, Peter M said: It's been a while since we had some 3.2 love: Doesn't look very fast, is this like yours Pete? Peter M 1 Quote Link to comment Share on other sites More sharing options...
tomo Posted 28March, 2020 Report Share Posted 28March, 2020 Yep I rekon the 3.6 case could save dollars, Especially one of the 964 variety , And you still have your stock motor . Or splash some cash and a 4 Ltr Cayman should do the trick Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 28March, 2020 Report Share Posted 28March, 2020 1 hour ago, Peter M said: Yes, I understand they increase the stroke from the standard 74.4mm to 76.4mm by machining the crank using smaller 50mm big end journals (later GT3 cranks seem a common swap as well) and machine the cases to take new cylinders with 102mm bores (up from 95mm) to get them to 3.8 litres Surely it would be more cost effective to go turbo or use a 3.6 litre engine as a base? I'm no expert and have not done this... yet! My understanding is the 3.0 crank is 70.4mm stroke.. the 3.2 has a 74.4mm stroke which is where it gets the 3.2 litres. (or 3.15 i think to be more accurate) The 964, 993 and 996 GT3 all have a 76.4mm stroke.. 964 crank is not favoured. But these cranks get you another 100cc with a stock 95mm piston. Upgrade to a 98mm piston and you can then get to 3.45 litres. Cannot modify 3.0 cylinders due to groove for head gasket/flame ring, but can use 3.2 cylinders, have them bored and then re-coated. Or you can buy some expensive slip fit cylinders from LN Engineering and probably go even bigger. 993 crank is better but lacks cooling/oiling mods necessary for a hard run motor. It can be modified or you can buy a ....GT3 crank which has same stroke but is well designed to already flow plenty of oil to rods 2 & 5.. which are the last ones to get oil. The GT3 4.0 crank has an 80.4mm stroke.. with 95mm cylinders you are up to 3.42litres. or with 98 up to 3.64l. I am hoping to do an 'in between' motor in the coming weeks.. 3.0 with a 993 crank and some higher compression 95mm pistons. With a decent cam, headers and itbs, I am hoping to make a VERY strong street car. firstone 1 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 28March, 2020 Author Report Share Posted 28March, 2020 9 minutes ago, Mike D'Silva said: I am hoping to do an 'in between' motor in the coming weeks.. 3.0 with a 993 crank and some higher compression 95mm pistons. With a decent cam, headers and itbs, I am hoping to make a VERY strong street car. Mike, Looking forward to another of your builds! So 76.4 stroke and 95mm cylinders gives only gives 3.25litres. Wouldn't it be A LOT cheaper to stick with standard 70.4mm crank and go a set of bored out 3.2 cylinders giving almost the same capacity at 3.19 litres? (Also known in the trade as a 3.2SS I believe!) Also wouldn't you need a set of special conrods with the 993 crank because the big end journals are shorter? (I think! The conrods are thinner??)) Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 28March, 2020 Report Share Posted 28March, 2020 This is the age-old question that women have been asking for centuries... what is more important.. Girth or Length??? Or in our engine case, stroke or bore. I'm being educated as I go along.. but I'm told that bore tends to favour a higher rpm situation.. where stroke tends to produce more torque down low. If budget is not a constraint, then I'd do both. But if money is a limit and the car is mainly a street car, and the goal is not to produce a dyno sheet to impress your mates, then stroke will give real world performance (I think). Yes, I am planning to use stock 993 rods with the 993 crank. We will get a custom piston from CP that uses the same pin as the 993 rod. Not sure how high compression to target just yet. 10.5 seems to be maybe a tad too much.. probably get it down to 10.2 or 10.3 to be safe? For capacity calculation, I am just using an online calculator.. https://spicerparts.com/calculators/engine-displacement-calculator On 17/02/2020 at 18:31, Peter M said: Missus said to me yesterday: "You know those cars that wake you up in the middle of the night because they are so loud that you just wish the driver would crash and die so you can go back to sleep? Your red car is that loud." GULP!😨 haha, just saw that. Your wife sounds funny! Peter M 1 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 28March, 2020 Author Report Share Posted 28March, 2020 Playing with that online calculator makes you realise a couple mm either way doesn't make a big differences to the capacity but I would imagine a huge difference in $$$$$! Mike, I don't think it is as simple as "stroke will give real world performance". For the likely combinations in the same capacity class, I think cam and induction choices will have a greater effect on real world "feel". Not that I'm dissing 993 engines, I actually wanted my 3.4 build to have the same feel as my old 993 engine. I'm very interested in following your build and seeing your results. Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 28March, 2020 Report Share Posted 28March, 2020 12 minutes ago, Peter M said: Playing with that online calculator makes you realise a couple mm either way doesn't make a big differences to the capacity but I would imagine a huge difference in $$$$$! Mike, I don't think it is as simple as "stroke will give real world performance". For the likely combinations in the same capacity class, I think cam and induction choices will have a greater effect on real world "feel". Not that I'm dissing 993 engines, I actually wanted my 3.4 build to have the same feel as my old 993 engine. I'm very interested in following your build and seeing your results. Totally agree with you on the cam. But I'm led to understand that if you compared just the bore vs stroke argument, stroke rewards you down low, and bore rewards you up top. These are not my claims at all.. Quote Link to comment Share on other sites More sharing options...
tomo Posted 28March, 2020 Report Share Posted 28March, 2020 Just as a comparison the cayman motor has a 81.5 mm stroke with 102 mm bores to get its 4 Ltrs Quote Link to comment Share on other sites More sharing options...
MFX Posted 28March, 2020 Report Share Posted 28March, 2020 Well I am not sure of the exact specs of the bore and stroke, but the genuine '71 911ST that was at Symmons Plains last week with a 3.0RSR engine had 12:1 compression, revved to 8700rpm and peaked at 350hp on an engine dyno. The thing screamed, but I suppose when money is no object, the sky is the limit Raven 1 Quote Link to comment Share on other sites More sharing options...
DJM Posted 28March, 2020 Report Share Posted 28March, 2020 I always understood that bigger bore, shorter stroke provides higher revving, racier motor. Longer stroke is more torquey and probably more driveable but doesn’t rev as hard so not as exciting for a performance engine. Completely uneducated on the matter, just my perception from decades of reading car mags etc. ive seen a couple of racy old 911s with “short stroke” motors which I assume is like the ST mentioned above. Hard revving, high compression and a bit cantankerous for road use. Quote Link to comment Share on other sites More sharing options...
StevepGT3 Posted 28March, 2020 Report Share Posted 28March, 2020 Shorter stoke and larger bore for the same capacity = lower piston speed for the same revs, hence the ability to raise the revs to get more power for the same piston speed,and with a larger bore There is more room to fit bigger valves Quote Link to comment Share on other sites More sharing options...
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