another 996 plenum and tb question

[Paseb]

Ok guys,

i have another question regarding the 996 plenum and tb question

i currently have a 996 c4 3.6l 996 plenum and tb in my shop.

current size is 74mm,

is it a direct bolt-on to a stock 3.2l motor?

or i need to buy reducers hoses?

would you invest more and go to a 76mm size?

im currently running straight pipe, except i still have the stock headers(cats)

has anyone been running a bigger straight pipe system?

i cant remember the size of the stock piping but, would there be any benefice to go to 1.5in instead of 1in? numbers for reference only

thanks

[edc]

You can stretch your rubber hose couplers over and they provide a better fit than the reducers I tried. I used 83mm from MAF to TB. http://www.boxa.net/forum/index.php?showtopic=53075&page=9

[BYprodriver]

Boxster T/B = 68mm

996 C2 T/B = 74,75,76mm depending on who is measuring.

996GT3 T/B = 83mm

Boxster muffler inlet = 1.5" so that should be your pipe size.

[Paseb]

thanks guys,
so i will just go with the 996 c2 plenum and tb

can i increase the size piping to 1 3/4" or even 2" ? would it gives any power gains? or i just leave the stock piping at 1.5" and only upgrade to 996 plenum and tb ?

[BYprodriver]

Originally Posted by Paseb

thanks guys,
so i will just go with the 996 c2 plenum and tb

can i increase the size piping to 1 3/4" or even 2" ? would it gives any power gains? or i just leave the stock piping at 1.5" and only upgrade to 996 plenum and tb ?

You always work on the weakest link. If your muffler inlet is 1.5" there is no need to go bigger upstream. To my knowledge Fabspeed is the only muffler with a bigger inlet (2") & they include the secondary pipes (2")

[Paseb]

why not putting a bigger exhaust size?

you had more air to the engine

im still using the stock headers with cats, but after that, im straight pipe.

from the 3 bolts flanges, i would run a bigger straight pipe ie 2'' instead on the stock piping size

????