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The immediate response time of the DFI

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Old Jul 29, 2009 | 09:39 PM
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The immediate response time of the DFI

It seems like most of the posts on the 09 car comment on PDK or the refresh styling . Most of the concerns have been about the new engine.

But what big difference seems to get overlooked ?

The immediate response.

Some may have noticed it in the 996tt vs PDK video on youtube . It's best described as am immediate response when pressing the pedal . Unlike the Turbo known for lag this engine is the exact opposite .

It even has more jump than the 997.1 . the M3 and any other car i have owned . It can actually feel like it leaps instantly --witrh no delay time at all --faster than an e mail sent to youself .

OK so it won't run a 997tt but it will get the intitial jump on just about anything .
 
Old Jul 29, 2009 | 09:52 PM
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I am not so sure.
My 3.8 DFI doesn't feel particularly responsive. I would actually put it behind my ol' E46 M3 engine. The engine is still relatively new and tight (2000 miles) and the temps where I live are hovering around 80 deg F. But so far i am far from impressed. I was actually thinking of having the dealer look at it and see what they think. I feel the torque is pretty soft until around 5000 rpm. I did some 5-60 rolling street starts and I am getting around 5.2 seconds. I keep thinking that my M did it in 5.3, and that car was short 50 bhp compared to my 997 and was 200 lbs heavier. Maybe around 3000 miles things will change! At least I hope so!
 
Old Jul 29, 2009 | 10:15 PM
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Originally Posted by JohnM
I am not so sure.
My 3.8 DFI doesn't feel particularly responsive. I would actually put it behind my ol' E46 M3 engine. The engine is still relatively new and tight (2000 miles) and the temps where I live are hovering around 80 deg F. But so far i am far from impressed. I was actually thinking of having the dealer look at it and see what they think. I feel the torque is pretty soft until around 5000 rpm. I did some 5-60 rolling street starts and I am getting around 5.2 seconds. I keep thinking that my M did it in 5.3, and that car was short 50 bhp compared to my 997 and was 200 lbs heavier. Maybe around 3000 miles things will change! At least I hope so!
You defenetly have a problem with your car, 5,2sec from 5-60 is not even acceptable for an old 996 with 300Hp. Hope you can solve it quickly and keep us posted.
 

Last edited by J.Seven; Jul 29, 2009 at 10:30 PM.
Old Jul 29, 2009 | 10:24 PM
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Originally Posted by yrralis1
It seems like most of the posts on the 09 car comment on PDK or the refresh styling . Most of the concerns have been about the new engine.

But what big difference seems to get overlooked ?

The immediate response.

Some may have noticed it in the 996tt vs PDK video on youtube . It's best described as am immediate response when pressing the pedal . Unlike the Turbo known for lag this engine is the exact opposite .

It even has more jump than the 997.1 . the M3 and any other car i have owned . It can actually feel like it leaps instantly --witrh no delay time at all --faster than an e mail sent to youself .

OK so it won't run a 997tt but it will get the intitial jump on just about anything .
I was also impressed with instant response from DFI engine, specialy with PDK + SP+ on. At 3000rpm with SP+ it almost reminds me the V10 M5 with 580Hp from a friend of mine, although the M was indeed faster, but you wouldn´t tell there was a 200hp difference, only at high revs (+5500rpm) big dif would show up. I will never forget that M car again, it´s a beast.

Have you also notice how good is the engine sound inside the cabine at + 3500rpm, and how stiff is the chassi? I can´t compare with 997.1(never had one), but compared to 996, the 997.2 has a much rigid chassi.
 

Last edited by J.Seven; Jul 29, 2009 at 10:27 PM.
Old Jul 29, 2009 | 10:30 PM
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Mine nails it much like in this video. Look at 10 seconds low it leaps and hangs on for awhile. http://www.youtube.com/watch?v=R5BVmaU-Vvo
 
Old Jul 29, 2009 | 10:34 PM
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Originally Posted by J.Seven
I was also impressed with instant response from DFI engine, specialy with PDK + SP+ on. At 3000rpm with SP+ it almost reminds me the V10 M5 with 580Hp from a friend of mine, although the M was indeed faster, but you wouldn´t tell there was a 200hp difference, only at high revs (+5500rpm) big dif would show up. I will never forget that M car again, it´s a beast.

Have you also notice how good is the engine sound inside the cabine at + 3500rpm, and how stiff is the chassi? I can´t compare with 997.1(never had one), but compared to 996, the 997.2 has a much rigid chassi.

I love the response and agree 100 percent. as for the sound I am totally spoiled by my Tubi race in the Turbo .
 
Old Jul 30, 2009 | 05:43 AM
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Originally Posted by J.Seven
You defenetly have a problem with your car, 5,2sec from 5-60 is not even acceptable for an old 996 with 300Hp. Hope you can solve it quickly and keep us posted.
I think i will be paying for some Dyno time. Gotta bring something to the dealership, or they will brush me off! Anyone know a Good Dyno shop in the NJ/Philly area????
 
Old Jul 30, 2009 | 11:30 AM
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My 997.1 is very responsive with sc activated
 
Old Jul 30, 2009 | 12:08 PM
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With PDK in regular mode and a light foot the engine responds in a very leisurely fasion that belies the 385HP/310ft/lb torque. I think this is related more to the transmission programming response than to the DFI engine. In SC, and particularly in SC+ the engine/transmission response is instantaneous, and personally I find SC+ somewhat brutal to the mechanical components. In terms of a manual transmission I can't imagine why the engine would feel anything but extremely powerful and free revving.
 
Old Jul 30, 2009 | 12:41 PM
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Originally Posted by DaveC
With PDK in regular mode and a light foot the engine responds in a very leisurely fasion that belies the 385HP/310ft/lb torque. I think this is related more to the transmission programming response than to the DFI engine. In SC, and particularly in SC+ the engine/transmission response is instantaneous, and personally I find SC+ somewhat brutal to the mechanical components. In terms of a manual transmission I can't imagine why the engine would feel anything but extremely powerful and free revving.
Normal mode is great for boring gridlock traffic or residential areas. I don't even use the "auto" modes beyond that (unless I was optiong for launch control) . I throw it in manual set it to sport and it's free revving but the shifts are much faster than with a manual .
 
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