Needsdecaf

Serious Porsche is Serious.

Damn, that's a massive outlay of cash for 30 HP. But I am sure all the smiles you get will make it worth it! Love the pics too, thanks!

Gonna sell your IPD plenum? If so, PM me.

STG

IPD & stock (plastic) Carrera S

RobC4sX51

I have 23,500 miles on my 2013, May 2013 in service date. The X51 kit has a 2 year warranty.

"If the engine to be converted has a mileage of over 25,000 miles (40,000 km), the crankshaft main bearings and connecting-rod bearings must also be replaced. If there is obvious wear on the connecting-rod bushings (scores), the connecting rods must also be replaced."
This is a direct quote from the installation and conversion instructions from Porsche. So my timing is good albeit a little later than I would of liked. I considered this mod for almost one year and 6k miles!

RobC4sX51

Thanks Lex. I'm excited about it but admit some anxiety with all the parts changes. The dealer mechanic is someone I have known for almost 8 years and is very meticulous and competent. I will offer my thoughts after I drive it for a week or so. It does have a "break in" or "Engine Run-In" as Porsche calls it of "engine speeds of no greater than 5,000 rpm over a distance of 310 miles (500 km). The maximum engine power of 430 hp (316 kW) depends on the total mileage of the engine at the time of the retrofit and is achieved from a total mileage of approx. 6,250 miles (10,000 km) or higher."
I will do an oil change after 1,500 miles (25,000 total on my car). It is not required but by me! Oil was last changed at 23,000 so it is almost fresh. And I just learned it gets fresh oil now too. Thanks for your "support"!

RobC4sX51

They estimated (supported by Porsche information) of 40 hours. We agreed to do it at their convenience in December or January. I just had to keep the mileage below 25,000 miles. The kit sat at the dealership for about 4 weeks. My SA called last week and said "Merry Christmas" we can do it 5-9 Dec. The original agreed price was $6000. I had to buy (on my mechanics recommendation) 16 (8 per side) new head bolts that did not come with the kit, at a price of $178. The mechanic said he had never reused head bolts before and wasn't sure why Porsche didn't include and require them, but better to be safe than sorry for less than $200! He said they get "torqued to yield". So I assume that is a metal stretching term. Total cost for the mod will be just under $15,500. I hope to recover some cost with selling some parts but not counting on it. I love the car, this will be the "cats meow" for me.

RobC4sX51

Yes it is but the 30 hp were not the only improvements IMHO. Although I already have Sport Chrono, I did not have the third radiator. At the track last Sep I saw oil temps in the 260F range. I hope the coolant helps with oil temp and keeps the PDK cooler too. Standard on the GTS for a reason. The biggest gain is in the drive ability of the car. I drove a 2016 GTS4 in August. It was a coupe and not as nicely optioned as mine but I loved the way it accelerated in Normal mode even at slow speeds and city driving. And in Sport mode it was amazing! Both cars are PDK FYI.

PM coming your way ASAP regarding the IPD. Thanks.

LexVan

At about $500 per HP, this is very much in line in the Porsche world. With the added benefit of proven, warrantied, and integrated design. Try getting that with the myriad of aftermarket stuff we see offered.

Another way to look at it. The current Base vs the S is a price gap of $14,000 for a 50 HP bump. That's $280 per HP. It always cost more to get the ponnies after the factory.

Hurricane

You will love it! After your first drive, you will forget what it cost...

R_Rated

Can you get just the X51 Plenum? As soon as I find a job, I'm doing IPD (or X51 if it makes sense) and a 3rd radiator.

RobC4sX51

not sure if you can purchase just the power kit intake. STG may know. Would be pricey but such is this mod LOL. The head bolts were delayed until today so car won't be done until Mon/Tue. New heads are nice.

R_Rated

I'm going to just get the IPD, 3rd radiator and fancy powerkit cover. 2 to 2.5K installed

Hurricane

I need a towel after viewing all these 991 engine photos! So awesome!!! Love it!

STG

Rob, what does the inside of the plenum look like?

Is there are split for the air to the two sides like the IPD? Smooth inside?

I've never seen the X51 one for sale separately. I'm sure you can get it. Probably cheaper getting the IPD. Plus don't know if the X51 one is only made to fit the X51 air intakes (???) that connect to either side of it.

RobC4sX51

I will swing by the dealership tomorrow and try and get a picture of the opening. I do know that it isn't "hollow" in the middle like the IPD with Y design. And there are 3 soloniods (vacuum actuated I think) on the X51 intake vs just one soloniod of the stock intake including IPD plenum.

malahhaor

The 3 solenoids control the flaps inside the intake manifold, That's what helps generate more power across the band. Various intake rudders lengths at various RPM ranges.

Although pricey, having X51 is a unique and somewhat special in my eyes.
I would do it just to know i have it, not as much for the few ponies. although those ponies is awesome as well. And if you know your car well, you will fill them.