Big power 993 engines
05-10-2012, 02:32 PM
#61
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Its a 335 BHP, 280 lbs-ft 3.6 with our own resonance-plenum, ITB intake system, custom (mild) cams, with gently massaged stock heads and OEM pistons. The header/muffler system is our own design as well and uses Motec M84 Engine Management to give complete control and additional resolution to the fueling and timing maps.
Its benign enough that I'm now planning to build one for my own street car.
Its benign enough that I'm now planning to build one for my own street car.
The car is exceptional, of course, but the engine, its torque curve and throttle response make a huge difference.
Oil temp remained at 185* all day during hard sessions and in 90+ degree heat.
Last edited by KaiB; 05-10-2012 at 02:35 PM. Reason: my grammar sux
05-10-2012, 04:23 PM
#62
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Juha G's post is interesting. So, I get the 200 cell cats but exactly what is the Motec ECU doing that the stock ECU is not? I understand a stock ECU from Porsche has to take into consideration a broad range of operating parameters and attendant countermeasures to maintain a safe operating environment for the engine. But, a roughly 30hp difference between Motec and stock? Btw, I'm not caling into question Juha's results nor am I calling BS...I'm just curious what the differences are between Motec and stock.
One of the most interesting threads in a long time
One of the most interesting threads in a long time
80% from "optimizing" the ignition maps (advancing ignition)
20% from from the 200-cell cats (and correcting the fuel maps)
I don't really care what people think or say about this. That is the result I got. Both runs were on the sme dyno, same operator, same gear, close to identical athmospheric conditions etc.
Now let's wait till I get car on the same dyno with the supercharger...
05-10-2012, 04:38 PM
#63
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Where does the 30hp come from?
80% from "optimizing" the ignition maps (advancing ignition)
20% from from the 200-cell cats (and correcting the fuel maps)
I don't really care what people think or say about this. That is the result I got. Both runs were on the sme dyno, same operator, same gear, close to identical athmospheric conditions etc.
80% from "optimizing" the ignition maps (advancing ignition)
20% from from the 200-cell cats (and correcting the fuel maps)
I don't really care what people think or say about this. That is the result I got. Both runs were on the sme dyno, same operator, same gear, close to identical athmospheric conditions etc.
I concur, 9m achieves similar results with the 9m Motec upgrade on the 964 and I have found the same % gain on the decatted 993nVr engine in the back of my 3.2 Carrera. I also find more minor wins from individual cylinder tuning, injection timing optimisation, dynamically matched injectors and air intake changes. The bottom line with a correctly installed Motec conversion (not just the ecu) is that it allows you to play without sacrificing headroom (in spite of what the doubters continuously think).
05-10-2012, 04:57 PM
#64
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I concur, 9m achieves similar results with the 9m Motec upgrade on the 964 and I have found the same % gain on the decatted 993nVr engine in the back of my 3.2 Carrera. I also find more minor wins from individual cylinder tuning, injection timing optimisation, dynamically matched injectors and air intake changes. The bottom line with a correctly installed Motec conversion (not just the ecu) is that it allows you to play without sacrificing headroom (in spite of what the doubters continuously think).
05-10-2012, 10:14 PM
#65
Noodle Jr.
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Its a 335 BHP, 280 lbs-ft 3.6 with our own resonance-plenum, ITB intake system, custom (mild) cams, with gently massaged stock heads and OEM pistons. The header/muffler system is our own design as well and uses Motec M84 Engine Management to give complete control and additional resolution to the fueling and timing maps.
Its benign enough that I'm now planning to build one for my own street car.
Its benign enough that I'm now planning to build one for my own street car.
05-11-2012, 06:57 AM
#67
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05-11-2012, 07:15 AM
#68
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Mike is an engine builder with a great track record of building quality air cooled engines his shop is next door to Alex Job up in Travarse FL
Rich
http://www.jbracing.com/
Rich
http://www.jbracing.com/
05-11-2012, 08:33 AM
#69
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Question while all these smart engine guys are on this thread. I've heard that the 964 head is a much better design than the 993 head. I know there are some differences with exhaust mountings, SAI, etc., but could you do a top end rebuild replacing the 993 heads with 964 heads and optimal valve configuration (not sure what that is) and expect to see gains with a properly tuned either motoronic or Motec setup? If so, what HP do you think such a setup would produce?
05-11-2012, 09:19 AM
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Question while all these smart engine guys are on this thread. I've heard that the 964 head is a much better design than the 993 head. I know there are some differences with exhaust mountings, SAI, etc., but could you do a top end rebuild replacing the 993 heads with 964 heads and optimal valve configuration (not sure what that is) and expect to see gains with a properly tuned either motoronic or Motec setup? If so, what HP do you think such a setup would produce?
Good point, in principle you are correct for those tuners who prefer high velocity (small) intake ports. The downside is that the 964 cylinder head only has one pair of exhaust manifold stud drillings, hence whilst the heads will fit the engine, the RHS 993 heat exchanger (manifold) will not fit the 964 head. This was one of the deciding factors to me pushing the go button on the 9m billet head program.
05-11-2012, 11:24 AM
#72
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05-11-2012, 12:10 PM
#73
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Its a 335 BHP, 280 lbs-ft 3.6 with our own resonance-plenum, ITB intake system, custom (mild) cams, with gently massaged stock heads and OEM pistons. The header/muffler system is our own design as well and uses Motec M84 Engine Management to give complete control and additional resolution to the fueling and timing maps.
Its benign enough that I'm now planning to build one for my own street car.
Its benign enough that I'm now planning to build one for my own street car.
05-12-2012, 03:21 AM
#74
RL Technical Advisor
Hey Mark,
Nice car!!!
Happy to help you, anytime. I have some ideas for you whenever you decide to "pull the trigger".
Be well,