We r using 997tt intake manifold and plenum on 997 GT2 w/GT30R's from Todd K

Todd said that 997 GT2 intake made horrible midrange tq and 997tt intake and plenum is way to go.

The funny thing that we ran 997tt intake mainfold and plenum up to +1.9bar with no problem!!!

I know Keith 997tt also has no prob with his stock intake mainfold and plenum

 

Yea it may be a Freek thing. Todd was the one who told me to do it, and i am happy that he did.

 

Corey.
Time for some 1/4 times lol

 

Yea i know! I just ordered another 997 Intake to hold me over till i get a Built one

 

They are not the same. GT2 is aluminum. 997TT is plastic. Other differences, linked here:

https://www.6speedonline.com/forums/...96-engine.html

 

interesting info , thanks guys for sharing.

 

I can tell you from flow testing the 997 GT outflows the 997tt plenum.

If you can make use of the additional air and add the fuel you can't help but to make more power. If you can't make use of the additional air then you have answered your own question.

 

you mean the 997gt2 outflows the 997tt intake manifold?

were these flows done with the y pipe/t pipe plenum behind thorttle body installed for current year of just the intake manifold that we are discussing.

i ask because the 997gt2 (y pipe/tpipe) is actually smaller then the 997tt version

 

Yes, I misplaced the "2". Thanks.

 

Wow,

Thanks for the heads up. We have not seen this issue and have had cars run up to 41 lbs of boost. We have two cars in the 1.8-2.4 bar all day long. I will keep an eye on them.

Kindest

 

We also found odd mid-range numbers with the 997GT2 mani

 

no problem chad care to say anything about the 2 questions i posted im jsut curious on the plenum diameter change porsche did.

i would assume Neil flowed the manifolds by them selves but hey you never know

 

IMHO if you are using a flow bench then the info is useless. There is so many things wrong with using one as a guide for power. To name a few, there is no fuel, piston motion, both valves moving, the shock wave of the valve opening and closing, boost psi driving down the runner, valve overlap, positive pressure against the exhaust flow because you are driving a turbo....I will bet the bank that a GT3 intake out flows all of them but will make less power if just bolted down on the stock TT heads.

 

Betim, Is the car running 41lbs of boost on the stock ecu or a stand alone?

Tim

 

It is on the Stock ECU.