Guys,

I need some guidance! I have a 997 GT2 and already have CMS Intercoolers, CMS Carbon Intake pipes, IPD 82mm and GT3 Throttle body as well as a ERP Triple carbon clutch.

Question is, what turbo setup would you go? I want to keep the motor stock for the time being as I am unsure how long I want to keep the car.

Thanks in advance for any help.

 

What is your driving style?


Do you Track the car or Casual street drive it?

 

Mainly street driving.

 

Curious, have you any dyno results from stock to current with above mods?

 

I also have a Cobb tune. On a dynodynamics we got 434 rwhp

 

So Stock 434, what about after bolt ons and tune. Thinking of going the same route as you.

 

I'm not sure I'd do any turbo upgrade. I'd first install injectors and run e85. I would also swap the turbo inlet pipes. Crank the boost up a bit and see where that puts you.

If your set on upgrading turbos I'd stick with VTG as you mentioned returning it back to stock. The 65mm turbos from Sam have proven to be a great upgrade. Others might say the 68mm I'm just not sure the added cost equates to the performance gain.

Just saw your down under I'm not sure if you have E85 or not sorry if it doesn't apply

 

Depends on what your power goals are and how much you are willing to invest in the project. On the 996 i would say Alpha3076 all day but on 997 its so much more work getting those turbos to fit, the oil lines the water lines, exhaust etc etc. I would get some nice billet wheels put into your GT2 cores and that would keep it much simpler, less costly, less hassle.

 

Nice start with upgrades.
Did you by chance Dyno before?
Exhaust?

You could also just move to standard turbochargers non-VTG. But for a street car I believe you can get another 100 hp down and keep everything VTG based. It will be potent. 65mm and you'll have a smile! I have a few customers down under and one of them has every generation GT2! Let me know if I can help out!

Cheers,
Sam

 

That dyno run was with tune, GMG Exhaust and FVD headers only.

From what I know, dynodynamics read very low. Was somewhat disappointing!

 

We do have E85 but there are very limited supplies here. Not that I've looked into properly but not a lot that I've seen.

 

That was with tune, headers and exhaust.

I'm getting the clutch and all other parts installed next week. I will dyno and let you know the outcome.

 

Yes Dyno dynamics will make people shed a tear for sure. They read the lowest. GIAC tuning?

 

That would be great. Did you do a stock run on the dyno for a baseline? I hope you have a better experience with your clutch install than I did with my ERP

 

Given you're not sure how long you're keeping the car I wouldn't suggest going too custom. However, things tend to change with cars when power is added fairly effortlessly

If you've got E85 I'd highly suggest first getting higher flowing injectors on the car and getting an E85 tune. Cobb Accessport comes with an off the shelf map for E85 and your boltons. You can gain 50-80awhp over a pump gas tune with an E85 tune. Also like @prodigymb mentioned, a nice compressor wheel swap on your existing turbo would give you a nice bump as well.

Dzenno@PTF