no my shop in at built it for me. i was speaking of just the y pipe not the boy's. thats another 500 or so. when i met garth it was for tuning only. i have a shop in at that did everything i couldn't or didn't want to do then i flew garth down to tune it.

 

The first version of a custom Y-pipe I did was actually one with blow-through MAF, but the straight joined section before the sensor wasn't long enough for smooth flow and I had CELs repeatedly.
Second one is the the one in the pic below. ID is the same than in IPD's but it was done for aftermarket air cleaners in the engine bay. After testing and logging I decided to go for OEM 997 airbox and Y-pipe. I just couldn't seal air cleaners well enough from engine compartment's heat but now air entering the turbos is within 2C of ambient air's temperature.
I will get some logged data about (most likely) improved flow (with IPD's Y-pipe) when the season starts in April. Anyway even now the engine seems to breath easier compared to previous versions of aircleaners and turbo inlet piping. With that custom Y-pipe I had rather restrictive inlet piping. DIY Y-pipe I still have (for sale too) would be just fine if using air cleaners somewhere near turbos and running MAFless tune or standalone ECU. Neither of them are to be found from my car in near future...

 

Pete,
Are you running mafless now? And what is the ID of the OEM 997 Y-pipe?

I will be doing this too as I am going to a full GT2RS body with an OEM 7GT2 wing. I had to remove the rubber gaskets on the bottom of the decklid to get the lid to close (they were resting on the OEM 6tt air filter housing). Not a high priority yet, but it will be in a few months. I already picked up a 7 air filter housing. My first tune will hopefully net ~600FWHP.

 

Pete, is that Y-pipe for sale, did I understand you correctly? I'm interested, shoot me the details please? I'm still sorting Y-pipe and intercoolers

Steve, I've got a 997 Y-pipe coming I'd sell reasonably. I was/am going to use it as a possible pattern maybe. I've been told it's a source of restriction though. If you look at the advertisements for IPD 997 Y-pipes they describe the inefficiencies and diameters. There was an IPD 997 pipe in the forsale section for $600 the other day that also might interest you, I'm pondering it somewhat too

 

some thing to remember is the modding of these cars is over 10 yrs old now. no real new rocket science going on here save the standalone stuff. stick a 2.5 to 3" y pipe in there and move on to something exciting. all the various versions of stock and aftermarket piping have been tried.

 

Does the 997TT still route the air intake around back of the motor to get to the compressors? I know it has two MAF's right

 

Completely agree! However some shops wants $1800 for a fabbed pipe and BOV! That is insanity to say the very least. It's not rocket science as you say Smooth bends, decent sized pipe, fittings for what's needed, and BOV for venting. Mission accomplished.

997 - I believe that it uses a pair of pipes, one on each side of the motor. However I've already been proven wrong once on it's intake system so hopefully someone else can confirm.

 

your setup looks great. i think its best way for a clean look on 996 and good gains. i didnt touch the airbox on my 997tt, just got some nice inlet pipes to the turbos.

 

No. I still have a MAF. Only on the other pipe, it's signal is the doubled with tune. And it works... ID (difference) is best described in this picture:

http://www.ipdplenums.com/products/p...os/9971-turbo#

Thanks!

 

Quick question on the AC hard lines.. can i use the 997 hard lines?? or is just matter of a quick modification to the current ones??

 

Yes, from a turbo, preferably with 997's fuel cooler.


If you have a good shop and some parts, the mod is possible. Mine's modded from 996 Carrera's lines, with 997 turbo's fuel cooler.

 

Pete95,

Just curious what was the price tag on this mod?

thanks!

 

I really cant't say, depends on what parts you're going to use, how much you can DIY etc. I have three different Y-pipes, one OEM and several aftermarket airecleaners (housings), two sets of aircleaner-to-turbo pipes and so on....constant development and lots of extra parts. I think I now have reached the combination I was looking for at the first place. OEM 997 turbo looks with better flowing, but not excessive sized piping.

I must add here that AFAIK my car's the only 996 turbo engined car with with electronic controlled VTG-turbos (from 997 turbo) in the world. DIY.

 

That really came out very nice! Can you talk more to the turbos? I'm pretty sure they can be controlled with standalone EFI but I'm interested in how you did it and the advantages over aftermarket - if any. I know the front diff from the 997 can also be controlled with a standalone but don't know much about that or if it's even been done - yet. Neat stuff for sure, would love more details on your swap(s).

 

I'm working on a custom y-pipe... 2.5" runners with 3" center section.. work in progress!!