phazed Posted February 7 Report Share Posted February 7 As title. Interested to know. Obviously airbox but what else? Quote Link to comment Share on other sites More sharing options...
iborguk Posted February 7 Report Share Posted February 7 https://www.ultimatespecs.com/car-specs/Porsche/3616/Porsche-Boxster-(986)-S.html https://www.ultimatespecs.com/car-specs/Porsche/57478/Porsche-Boxster-(987)-S-32.html https://www.ultimatespecs.com/car-specs/Porsche/1792/Porsche-Boxster-(987)-S-34-295HP.html Quote Link to comment Share on other sites More sharing options...
phazed Posted February 7 Author Report Share Posted February 7 Thanks for that, but what is the actual mechanical difference? How is the extra brake horsepower obtained in the 987 guise? Quote Link to comment Share on other sites More sharing options...
iborguk Posted February 8 Report Share Posted February 8 (edited) One factor, altered valve timing for more torque/power output... There are different engine type codes across the model years, see the engine type date below. Googling the engine codes may provide further info... 986 1997–1999 2.5 L (2,480 cc) 204 PS (150 kW; 201 bhp) 245 N⋅m (181 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six "M96.20" 2000–2002 2.7 L (2,687 cc) 220 PS (162 kW; 217 bhp) 260 N⋅m (190 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam) "M96.22" 2003–2004 2.7 L (2,687 cc) 228 PS (168 kW; 225 bhp) 260 N⋅m (190 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.23" 2000–2002 3.2 L (3,179 cc) 252 PS (185 kW; 249 bhp) 305 N⋅m (225 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam) "M96.21" (Boxster S) 2003–2004 3.2 L (3,179 cc) 260 PS (191 kW; 256 bhp) 310 N⋅m (230 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.24" (Boxster S) 2004 3.2 L (3,179 cc) 265 PS (195 kW; 261 bhp) 310 N⋅m (230 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.24" (Boxster S "50 Jahre 550 Spyder") VEHICLE ENGINE TYPE MY ENGINE NO. TECHNICAL DATA [2] BOXSTER M96.20 97 V 65V 00501>60000 6ZYL/2,5L /150 KW BOXSTER M96.20 98 W 65W 00501>60000 6ZYL/2,5L /150 KW BOXSTER M96.20 99 X 65X 00501>60000 6ZYL/2,5L /150 KW BOXSTER M96.22 00 Y 65Y 00501>60000 6ZYL/2,7L /160 KW BOXSTER M96.22 01 1 651 00501>60000 6ZYL/2,7L /162 KW BOXSTER M96.22 02 2 652 00501>60000 6ZYL/2,7L /162 KW BOXSTER M96.23 03 3 653 00501>60000 6ZYL/2,7L /168 KW BOXSTER M96.23 04 4 654 00501>60000 6ZYL/2,7L /168 KW BOXSTER "S" M96.21 00 Y 67Y 00501>60000 6ZYL/3,2L /185 KW BOXSTER "S" M96.21 01 1 671 00501>60000 6ZYL/3,2L /185 KW BOXSTER "S" M96.21 02 2 672 00501>60000 6ZYL/3,2L /185 KW BOXSTER "S" M96.24 03 3 673 00501>60000 6ZYL/3,2L /191 KW BOXSTER "S" M96.24 04 4 674 00501>60000 6ZYL/3,2L /191 KW 987 2004–2006 2.7 L (2,687 cc) 240 PS (177 kW; 237 bhp) 270 N⋅m (200 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam) "M96.25" 2006–2008 2.7 L (2,687 cc) 245 PS (180 kW; 242 bhp) 273 N⋅m (201 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M97.20" 2004–2006 3.2 L (3,179 cc) 280 PS (206 kW; 276 bhp) 320 N⋅m (240 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.26" (Boxster S) 2006–2009 3.4 L (3,387 cc) 295 PS (217 kW; 291 bhp) 340 N⋅m (250 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M97.21" (Boxster S) 2007–2008 3.4 L (3,387 cc) 303 PS (223 kW; 299 bhp) 340 N⋅m (250 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M97.22" (Boxster "RS 60 Spyder Edition", Boxster S "Porsche Design Edition 2") VEHICLE ENGINE TYPE MY ENGINE NO. TECHNICAL DATA [3] BOXSTER M96.25 05 5 615 00501>60000 6ZYL/2,7L /176 KW BOXSTER M96.25 06 6 616 00501>60000 6ZYL/2,7L /176 KW BOXSTER M97.20 07 7 657 00501>60000 6ZYL/2,7L /180 KW BOXSTER M97.20 08 8 658 00501>60000 6ZYL/2,7L /180 KW BOXSTER "S" M96.26 05 5 625 00501>60000 6ZYL/3,2L /206 KW BOXSTER "S" M96.26 06 6 626 00501>60000 6ZYL/3,2L /206 KW BOXSTER "S" M97.21 07 7 677 00501>60000 6ZYL/3,4L /217 KW BOXSTER "S" M97.21 08 8 678 00501>60000 6ZYL/3,4L /217 KW BOXSTER "S" RS SPYDER M97.22 08 8 668 00501>60000 6ZYL/3,4L /223 KW Edited February 8 by iborguk Quote Link to comment Share on other sites More sharing options...
½cwt Posted February 8 Report Share Posted February 8 Scanning through the parts cat, the M96 2.7 3.2 engine installations used for the first 2 years in the 987 has the vast majority of 986 or 996 parts. The only later parts are minor things or known up issues (water pump) which are backwards compatible to 986 installations. The air box is different as you already say, but valves, cams, heads, throttle body, induction manifolds and pipework, injectors and fuel system remain the same. Simple answer seems to be that the ECU was allowing it to develop more power. By the time it came to market the 997 had been given more power (3.6 was up to 325PS) too so this step up didn't 'threaten' the performance differentiation between 987 and 997. Quote Link to comment Share on other sites More sharing options...
phazed Posted February 8 Author Report Share Posted February 8 All very interesting. if the airbox was upgraded on the 986.com can the existing ECU be remapped for a few more BHP? Quote Link to comment Share on other sites More sharing options...
iborguk Posted February 8 Report Share Posted February 8 http://986forum.com/forums/performance-technical-chat/75913-987-airbox-worth.html Quote Link to comment Share on other sites More sharing options...
½cwt Posted February 8 Report Share Posted February 8 1 minute ago, phazed said: All very interesting. if the airbox was upgraded on the 986.com can the existing ECU be remapped for a few more BHP? There are a few threads on here re engine tuning. Remaps are certainly possible, the standard Porsche map is quite conservative to tolerate 95RON (even though they recommend 98RON) and use in a wide variety of climates so an air filter that could be freer flowing than the standard one and do release some power, however as a normally aspirated engine don't expect the big hikes a turbo engine can deliver. De-snorkelling the intake into the air box is claimed to give a bit too and adds induction noise to the experience if noting else. TBH with yours I'd recommend getting it back on the ground and driving it for a bit. The ECU (DME) will have been disconnected for so long that it will be relearning from scratch, so only feed it the higher octane fuel and put in a freer flowing air filter panel and see if you have 'enough' power to be going on with. Quote Link to comment Share on other sites More sharing options...
TV8 Posted February 8 Report Share Posted February 8 To me the question is the difference between my 3.2 Boxster at 250 bhp and the 3.4 911 of the same year at 300. I want those 200 cc which give 50 more bhp. Not sure, but I think when the Boxster went from 250 to 260, the corresponding extra 200 cc gave the 911 320! its like the Boxster is de tuned… Quote Link to comment Share on other sites More sharing options...
iborguk Posted February 8 Report Share Posted February 8 (edited) Almost like someone didn’t want to cannibalise sales of the 911. Oh wait my cynical lizard brain kicked in for a moment … Edited February 8 by iborguk 1 Quote Link to comment Share on other sites More sharing options...
½cwt Posted February 8 Report Share Posted February 8 1 hour ago, iborguk said: .... Oh wait my cynical lizard brain kicked in for a moment … No, I don't think it did. This is widely accepted as what happened, even if they don't admit it in Stuttgart. 1 Quote Link to comment Share on other sites More sharing options...
½cwt Posted February 8 Report Share Posted February 8 1 hour ago, TV8 said: To me the question is the difference between my 3.2 Boxster at 250 bhp and the 3.4 911 of the same year at 300. I want those 200 cc which give 50 more bhp. Not sure, but I think when the Boxster went from 250 to 260, the corresponding extra 200 cc gave the 911 320! its like the Boxster is de tuned… Yep, that's about the size of it. 1 Quote Link to comment Share on other sites More sharing options...
edc Posted February 8 Report Share Posted February 8 Look for some old posts by @Berty987The other big difference is the manifolds and cats. The 987.1 has a better flowing design than the 986. I put my 550, on 105k ish at the time, on the Dyno a long time ago and it wasn't running perfectly at that time and it did 272bhp from memory. A box fresh 987 3.2 would have been 280bhp in theory. I can see if being the same or more as a 987 with some minor basic mods. Quote Link to comment Share on other sites More sharing options...
½cwt Posted February 8 Report Share Posted February 8 Ah, I found so much the same inside and on the inlet side that I overlooked the exhaust. Extra manifold cats but separate back boxes on the 987 3.2, maybe breathes a bit better. Quote Link to comment Share on other sites More sharing options...
Bike Loon Posted February 8 Report Share Posted February 8 18 minutes ago, edc said: Look for some old posts by @Berty987The other big difference is the manifolds and cats. The 987.1 has a better flowing design than the 986. I put my 550, on 105k ish at the time, on the Dyno a long time ago and it wasn't running perfectly at that time and it did 272bhp from memory. A box fresh 987 3.2 would have been 280bhp in theory. I can see if being the same or more as a 987 with some minor basic mods. When I had my 987.1 3.4 I put that on a dyno, it was meant to be 295bhp from factory. Germanic efficiency 1 Quote Link to comment Share on other sites More sharing options...
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