Thought you guys might enjoy this, I am having my turbos upgraded and managed to get a picture of the compressor wheels side by side! On the left is a stock 997 Turbo compressor wheel, and on the right is a Forced Performance/TiAL Billet HTA compressor wheel! Pretty easy to see the difference.




Stock vs. FP/TiAL Billet HTA

 

How much power does it make?

 

Well, it was making 600 to the tires before on the stock turbos. With these monsters I would expect 800+ isn't out of the realm of possibility. Going to have to keep it turned down a bit to protect the stock rods in the engine though.

 

Who sticks those wheels in stock turbos? How's the lag compared to 63.5's or 65's?

 

Most of the high end vendors on here use these. There are really only a very small handful of VTG upgrades available, they get re-branded and sold through various vendors. The 63.5 and 65mm wheels are essentially the same but scaled to different sizes.

 

nice...what size are they? Are you extruding the hotside? Proto tune?

 

I'll be running the "65mm" version, which is as large as you "should" go on the factory compressor housing.

I'm sticking with the Protomotive tune for now, Todd has graciously agreed to retune for it. The main difference with my car from the "standard" builds is e85. I really want end-user adjustability, if Cobb ever gets their software releases I will probably pick up an Accessport.

Next steps for me are perhaps better intercoolers, depending on how the 997.2 cores handle these turbos, and at some point rods/studs in the engine so I can turn up the boost. Also maybe an ERP triple carbon clutch but I'm waiting on that until my Sachs 2.5 gives up and/or some more of the bugs get worked out of it.

 

e85 is what makes it worthwhile to go beyond the 63s. I have (actually HAD - more details pending) the 63s and asked about the 65 and 67 and Todd indicated it wouldn't be worthwhile to upgrade unless going with racegas/e85/meth. The Sachs 2.5 should be good enough. I wish the Cobb Accessport could be used with other tuners files but it can't. I have the .2 I/cs and they are really good at this level of turbo. Definite improvement over the .1 I/cs at the track.

Did you deal with FP directly or do this through Todd?

Post some pbox results when you are up and running!

 

The Protomotive turbos are different, they are using Blouch to do the turbo builds/assembly. That's why I went the direction I did, as I really wanted the FP/TiAL HTA parts. With any luck I will have it up and running late next week/weekend. I don't have a P-Box but I may stick it on the dyno for tuning with Todd.

I still have yet to locate the gnomes in the rear. I took it in to RUF in Dallas and tried to show them, but it looks like the gnomes either went on strike or otherwise took the day off because everything ran great when I took them for a test drive. They were not at all impressed with the car running e85, and rolled their eyes when I told them what the setup was.

 

Nice look forward to the results!!

 

You're going to be zooming, my friend!

 

Yeah those pesky gnomes are aggravating. Dynotuning is great but the pbox **** is what the rest of us want to see.

 

nice. new wheel looks goooood. what does tial charge for the upgrade?

 

rix one thing I'd suggest doing while you're at it is to have the turbine wheel clipped to help on the exhaust side of things. There's a point where a bigger compressor wheel will do nothing for additional power as it'll be a mismatch for the turbine side. If you can put in a more efficient turbine wheel (larger or at the minimum clipped) that's where the meat of the gains will be realized.

Good luck, look forward to seeing what you come up with here. We're Forced Performance dealers and we use their HTA turbos in our single turbo kits on the BMW N54 platform. They've certainly still got some of the best aero designs on the market today.

 

That's good advice, I am having the turbines clipped a few degrees. I've been running FP/TiAL products for 15 years in my turbo engines. They have come a really long ways over that timeline, but the HTA and newer HTZ aeros are second to none.

It used to be that large companies like Honeywell/Garrett and Mitsu Heavy industries ignored the enthusiast entirely - nowadays there are an immense number of options that are tailored to our needs. The old Frankenstein combinations are a thing of the past.

Generally the Porsche 997 crowd goes for a black box product generally judged by how much it costs. I'm looking forward to more options and open tuning platforms being available.