HellaHashTags

A lot of negative comments about the DFI engine in this thread sound like "well this engineer said this" and "this publication said that" from 8 years ago. I think we have gathered enough actual data in the past 8 years to come to a less biased conclusion: the DFI engine is reliable and responsive to simple power adders.

Catorce

Evidence? No, not really, except like I mentioned, i am the only one that still manufactures the Mezger engine case ON THE PLANET and own the tooling for the only repro case that exists. I know what they cost to make. The case design is super simple. I have built dozens of Mezger engines in the past (air cooled), but the TT case assembly is no different.

raclaims

For me it's the .1 without a doubt. Yes I own one so I'm biased.

However, I also own a new RS and a 12 cup car and a 16 cup

The 997.1 and the 12 cup just have a raw edge that is gone in the newer 911s.

I'll never sell my .1 and it's frankly the most under valued car in the 911 lineup if you ask me

white997

I dont know failure rates, i bet most dont get posted. I personally seen a 991 9A1 fail. this was in a 100% stock car, the car just shut down after a spirited run and would not crank over and smoke was all over the place. The car has been at Porsche of SF for 2 months now with no resolution, they took the whole motor apart. Owner got the shaft, as he is stuck without a car until Porsche decides what to do.

HellaHashTags

Are you talking about a 991 GT3 or a 991 Turbo?

white997

991 turbo

HellaHashTags

That's the first time I've heard or read about a 997.2 Turbo or 991 Turbo having a catastrophic failure like that. The 997.1 Turbo issues are extremely well known and documented. I wonder why that is?

Whosdady

I agree that most will be biased towards what they drive. I'm a fairly new TTS owner so I'm happy to share why I purchased a 997.2 over a 997.1. For me the harder decision was between the 991 and the 997.2.

For me the 997.1 felt sluggish and old. Less nimble and rough, not raw. Believe me, I would have gladly saved the $15K- $20K by going with an older model but it didn't seem worth it. The PDK, dynamic motor mounts and ceramic brakes are amazing. All of which are available on the 991 and that is why I feel it's a better comparison. As those are some of my favorite aspects of the 997.2.

And I would take a dfi motor anyday on a turbo car...

Southpaw

Same here... first I've heard of a DFI motor failing. I'm not saying it's not possible or never happened, I'm saying the reports of the 997.2/991 turbo DFI failing are few and far between. The failures are a small minority..
The more widespread, general consensus among their owners and tuners is it's proven to be very reliable... Even when modded.

CodeRed

drink some more kool aid

Quadcammer

what koolaid? The 7.2 motor appears to reliable, no? Do you have evidence otherwise (1 anecdote otherwise)?

Southpaw

Fortunate enough to have drank both flavor kool-aids... Both were very yummy

786

drove both, bought a .1, the PDK was nice and all but i was bored with the lack of interaction. both great cars and you really can't go wrong with either.

tbh the 997 GT3's and GT4 i drove since i bought my 997TT are more enticing than a 997.2TT. the linearity of the power delivery coupled with that delicious gearshift make a compelling case. i may trade for one of those before i would consider another Turbo. they're obviously slower but have more than enough power for street use, and i prefer the overall feel more.

i disagree with whoever said the 7.1 felt old and sluggish compared to a 7.2, you can't compare a manual to the PDK car as pretty much anything feels sluggish compared to one of those. in gear acceleration was similar in my experience, and a tuned 7.1 feels really strong.

raclaims

To say the 997.1 is sluggish never drove mine...seriously...a few run of the mill mods and it's a monster.

I didn't add bigger turbos or any wild 800HP kit...just exhaust, headers and a ECU flash and a set of coilovers and short shifter for a little more fun.

I think you can do without the headers and just do the exhaust and flash and suspension and it will rock your world

786

agreed, less is more on these cars imo. Exhaust, headers, IC's, inlets, and a tune would be a stout setup.