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Does anyone do enhanced engine parts for the 9A1 engine beyond the BGB 3.8 conversion and the IPD Plenum? I'm talking about ported and flowed heads, modified camshafts, blueprinted/balanced engines etc. Or is that just old-school now that everything has a computer on it?

Is there anything to be gained from doing that on a Porsche engine since they seem pretty smooth and balanced to me.

About 15years ago I had a little Fiat with a 1.2 litre engine that we tuned up from 54bhp to 120bhp by balancing, flowing and camming it and putting a set of throttle bodies on it. Just wondered whether anything like that existed for the 9A1 motor.
 

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From what I understand, until we are able to properly tune this engine's ECU, physical modifications to the engine (intake, plenum, exhaust, etc) will yield only minimal results.
 
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Does anyone do enhanced engine parts for the 9A1 engine beyond the BGB 3.8 conversion and the IPD Plenum? I'm talking about ported and flowed heads, modified camshafts, blueprinted/balanced engines etc. Or is that just old-school now that everything has a computer on it?

Is there anything to be gained from doing that on a Porsche engine since they seem pretty smooth and balanced to me.

About 15years ago I had a little Fiat with a 1.2 litre engine that we tuned up from 54bhp to 120bhp by balancing, flowing and camming it and putting a set of throttle bodies on it. Just wondered whether anything like that existed for the 9A1 motor.
We have with the 2nd generation and 1st generation cars. Right now we even have a handful of street cars running ported 997.2 X51 cylinder heads and valve work in Cayman/Boxster cars from the 987.2 era. We have yet however to install different cam shafts given the cost to develop cams and the fact that you don't have 100% control over the cams even with in-place tuning. For your generation car, there are really only 2 sources in the world right now for an aftermarket ECU mapping for the latest 981/991 generation platforms.

As far as displacement increases, we have a 4.0L kit for the 9A1 3.8L engines in development that does not require any over-boring but not yet for the 981/991, even though the parts are interchangeable. Until we get a mapping that we think is right for the street and track, that kit is only intended for the 2009 - 2012 997.2 / 987.2 ECU cars.

I think that the answer to your question though is that most people don't port the newest 991 cylinder heads because of the X51 Power Kit offering from the dealership; those heads actually have significant porting. Porting of a Porsche motor helps but substantial gains would be more easily realized IF you could add larger valves. A more aggressive cam shaft would yield much greater results.
 

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Does anyone do enhanced engine parts for the 9A1 engine beyond the BGB 3.8 conversion and the IPD Plenum? I'm talking about ported and flowed heads, modified camshafts, blueprinted/balanced engines etc. Or is that just old-school now that everything has a computer on it?

Is there anything to be gained from doing that on a Porsche engine since they seem pretty smooth and balanced to me.

About 15years ago I had a little Fiat with a 1.2 litre engine that we tuned up from 54bhp to 120bhp by balancing, flowing and camming it and putting a set of throttle bodies on it. Just wondered whether anything like that existed for the 9A1 motor.
First, realize that modern Porsche engines are generating equal or more than 100HP per liter, an amazing amount of power for the displacement. There isn't much left to be gained except through software. Blueprinting is always good and stands to gain a few HP. If you crack the case to blueprint, you might as well look into better components such as rods, crankshaft etc, as the factory uses powdered metal construction for those parts which are low cost, but not as strong as parts made from forged/billet steel.

Software is needed. No way about it. Everything is controlled by the computer. Ignition timing, variable cam timing and fuel delivery maps are all computer controlled. Too much modification can cause the engine to run too lean as the fuel injectors are sized for the engine size and expected air flow. The cam timings are optimized for the factory cam profile. Changing the profile can mess the computer up. The big issue is Porsche has encrypted the computer software, making it very difficult to make changes.

As far as ported and polished heads go, several people who should know say the 991 3.8L X51 power kit heads are ported as nearly well as can be done and there is not much to be gained with additional porting. The kit comes with special camshaft profiles (with more lift) and variable length intake manifolds to optimize the air flow at different RPM. But the extra flow needs a larger bore than the 3.4L engine to un-shroud the valves, allowing them to flow max air (as per public comment on another website by Jake Raby, noted Porsche engine builder). The X51 requires special software.

Best bet, get with a specialist tuner like BGB who has experience in this and take their recommendations. the days of do it yourself is limited to Band-Aid parts that don't do much and can hurt the performance of the engine.
 

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Discussion Starter · #6 ·
Thanks for the replies. On the Fiat we used a Motec to get a programmable ECU, but I guess with so much else dependent on the ECU that sort of thing is only really an option on a stripped out racer.
 

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By the end of this year we will have few tuners offering ECU tuning. That will open the gates to other upgrades.
 

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By the end of this year we will have few tuners offering ECU tuning. That will open the gates to other upgrades.
I kept hearing that for two years until I got bored and traded the 981BS on a 991TT. The 981 has been out since 2012 and we are currently well into 2015. I still haven't seen any real progress. BGB mentioned two possible sources for tuning but didn't mention the names specifically. Maybe John would care to elaborate?

- Patrick
 

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I kept hearing that for two years until I got bored and traded the 981BS on a 991TT. The 981 has been out since 2012 and we are currently well into 2015. I still haven't seen any real progress. BGB mentioned two possible sources for tuning but didn't mention the names specifically. Maybe John would care to elaborate?

- Patrick
Okay...I'll bite. I have heard of two additional companies that supposedly have cracked the DME encryption for the 991/981 in the U.S.; neither have dyno results nor customers that have dyno'd their cars before or after with any success.

I have an associate overseas that has a solution that can be attained in 20 -30 days starting tomorrow. It requires either of the following: 1.) removing and sending out your DME to have it cloned and returned 2.) replacing your DME with a mapped one & you giving up your DME as a core exchange. Option #1 is more expensive @ $4000 but is plug and play for all intents and purposes - your car sits during the interim but the parts go directly to/from you overseas and back. Option #2 @ $3000 requires you to give up your DME via a core exchange program and requires a remote unlocking of the DME for the vehicle once installed, which the end user cannot activate, only a specialist. Neither DME can ever be programmed again and if you attempt to write anything to it, it's toast.

All the while my existing tuner has had a 981 DME but nothing yet. I was hopeful because they have had success in getting beyond the encryption with new Audis and BMWs. This is why I have not proceeded with the options described above but that's just it...waiting.

I don't want to proceed with the overseas approach if for some reason my existing guys actually get it because it will be a huge conflict of interest. I would rather NOT have that in my hands at that time. I also don't want to get left behind without anything. The above listed options though are very much real and generate substantial power and torque for the car. It's the real thing.

I have a customer coming down with a PDK 3.4L 981 and we are going to install a Power Kit 3.8L engine conversion, which will require the DME being sent overseas so in the next 3-4 weeks, I'm going to be forced to pick a path...I just don't know which one.
 

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...and that is what you get. Currently throtteled to 435 HP...but potential for more power.

And in pops a guy with 48 posts to show us how it's done! Lemme guess, it will be available in a few weeks...

- Patrick
 

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And in pops a guy with 48 posts to show us how it's done! Lemme guess, it will be available in a few weeks...

- Patrick
Patrick, Mr. 48 posts is someone who has been writing on this subject in other threads for quite a while and seems -- who can really tell over the internet -- believable and to have accomplished a lot more than anyone else so far. Numbers can be deceiving......
 

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Okay...I'll bite. I have heard of two additional companies that supposedly have cracked the DME encryption for the 991/981 in the U.S.; neither have dyno results nor customers that have dyno'd their cars before or after with any success.

I have an associate overseas that has a solution that can be attained in 20 -30 days starting tomorrow. It requires either of the following: 1.) removing and sending out your DME to have it cloned and returned 2.) replacing your DME with a mapped one & you giving up your DME as a core exchange. Option #1 is more expensive @ $4000 but is plug and play for all intents and purposes - your car sits during the interim but the parts go directly to/from you overseas and back. Option #2 @ $3000 requires you to give up your DME via a core exchange program and requires a remote unlocking of the DME for the vehicle once installed, which the end user cannot activate, only a specialist. Neither DME can ever be programmed again and if you attempt to write anything to it, it's toast.

All the while my existing tuner has had a 981 DME but nothing yet. I was hopeful because they have had success in getting beyond the encryption with new Audis and BMWs. This is why I have not proceeded with the options described above but that's just it...waiting.

I don't want to proceed with the overseas approach if for some reason my existing guys actually get it because it will be a huge conflict of interest. I would rather NOT have that in my hands at that time. I also don't want to get left behind without anything. The above listed options though are very much real and generate substantial power and torque for the car. It's the real thing.

I have a customer coming down with a PDK 3.4L 981 and we are going to install a Power Kit 3.8L engine conversion, which will require the DME being sent overseas so in the next 3-4 weeks, I'm going to be forced to pick a path...I just don't know which one.
Pretty pricy for a reflash. Is there more to it? Any changes other opening the throttle all the way? Can we see before and after dyno graphs?
 

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Patrick, Mr. 48 posts is someone who has been writing on this subject in other threads for quite a while and seems -- who can really tell over the internet -- believable and to have accomplished a lot more than anyone else so far. Numbers can be deceiving......

"Mr. 48" is very well known in Germany and in the 981 crowd. Followed him for a while now on pff.de

later,
Andy
 

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That video says '981 with 991 GTS engine.'

I am curious though does PDK make a difference for tuning/ ability to tune? My VW TDI's weak link is the DSG. Though the engine can handle it seems, though the transmission can, its not recommended. Similarly, the same car with a manual transmission can tow, while the 'automated dual clutch manual' can't and actually slips sometimes under normal/ moderate driving.
 

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...next project. Cayman 981 with 991 3.8 liter engine AND PDK


Cargraphic headers, pse exhaust. Currently 400 PS (395 hp) at the crank. I will post the maha graph by end of this week I guess.

looking forward to thr data
 

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...you might as well look into better components such as rods, crankshaft etc, as the factory uses powdered metal construction for those parts which are low cost, but not as strong as parts made from forged/billet steel.
Are you serious - the 9A1 doesn't use a forged crank? Wow - even my Miata came with a forged crank from the factory.
 
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