Hi Guys,
First post and very happy to join this forum.
I have a 997 Turbo.1 so far done Kline, Cobb Map and GT2 RS Intercoolers.
What is the current consensus on the next upgrade? The car is used daily but looking for a bigger hit of acceleration, no more lag. I would probably like to keep the character of the car so guess keep vtgs and get 65mm? Lots of contradictory info when I did a search.
Regards,
Hass

 

I would consider D088 ducts and a Protune of the COBB Map. That would make a noticeable difference over what you got thus far.

 

I would do the same, DO88's, a custom map and aquamist (methanol). See how you find the car, then decide if you want to change the turbos.

 

Thanks. All the Aquamist I have seen seem to have odd ons in the boot space? I use that space on my daily commute and want to keep stock look and need something that I don't need to constantly monitor.

 

I was in the same position as you. New to Porsches but not new to the mod bug! Just bought mine new to me 2007 TT a few months back. Not knowing anything, I reached out to Sam who runs By Design. Highly recommend Sam based upon his knowledge, customer support and fast response on almost anything day or night.

I've haven't posted an update to all of my modifications but I went with his complete setup - new upgraded 65mm VTG turbos, By Design intercoolers (almost as good as the AMS ones but much cheaper in cost), Kline catless exhaust, Kline headers, Y pipe, plenum and throttle body...


We've been custom tuning in over the past few weeks, latest dyno results have it on pump 93 gas at about 580whp and 615wtq (close to 700 at the crank). Still dialing it in but results look fantastic given the upgrades. Just some ideas of what can be done given the above changes. Reach out to Sam and he can give you his thoughts as well.

 

I would recommend doing injectors, intake hoses, plenum, tb, etc. Do your maintenance items as well while engine is out and coolant pipes. If you have e85 locally that's the way to go. Expect ~600whp on stock turbos with e85 and a good tune. Plenty fast and reliable.

 

No E85 im afraid. Dguth thanks for the info, surprised it doesnt give more power with the 65's, thought minimum would be 600hp? I'm guessing it's the octane you are using.

 

Afraid of E85 huh? ok

The 65mm setup Dguth posted about above will deliver 600whp on 93oct fuel as you keep refining the tune. I have plenty of data on my build thread if you are interested in seeing what upgraded VTGs can do. My car has 63.5mm VTGs.

Another option is use 91-93oct with meth injection, many have had good results with this. However I'm assuming if you don't want to use E85 you would not want to use meth injection either.

 

I have bolt-on's with an E85 tune. Car made 593hp / 608tq. Plenty fast for the street, and super fun to drive. Drives like a stock car.

 

Yes, Sam and I are still refining the tune. We had some bad gas issues with the dyno run we did. Had 30 plus logs with no knock, filled it up with gas and took it to the dyno and low/behold had 6 to 8 degrees of knock pull throughout the runs. I ran a half tank of gas out the next day, put fresh 93 Shell in, ran 4 logs and back to almost no knock. Funny how a little bad gas can effect these cars so much. Plus the dyno my shop is using is pretty low. At the end of the day as Maestro stated, the 65mm upgraded turbos with accompanying bolt on should get you to 600 whp (that was my goal with this setup safely). I do have access to E85 but I just had my engine out a few months ago but didn't do enough research to know I should have upgraded by injectors while I had it out (dumb move on my part). So I'm going to wait till next year to change out the injectors. Then I'll move on to E85 and keep pushing the power up. At least I know now the car has all the parts needed to keep going if I want to. Right now it's plenty fast enough for what I need...