Need SERIOUS Advice - GT Throttle Body, GTS Block, PFC - how to compensate???

[CONTROL ONE]

ok

my 2003 2ZZ came with DBW
not a big problem, the shop made an adapter plate to fit my GT throttle body (cable) onto the 2zz block

now, i am getting the PFC from MWR pretuned for I/E.

because the GT TB is slightly less diam. than the GTS TB, how would i compensate for this with the PFC?

or would i even need to?

[Liqquid]

the throttle body opening should restrict the airflow and cause it to still be an accurate-enough reading at the mafs?
you should be able to see the end result at the o2 anyways and not be in danger of anything as far as I understand it... maybe someone else has some better info though, but instead of dealing with that, can you have the gt bored to match the gt-s size?

[DYI01]

I would at least have the machine shop bore out or taper bore the TB out some if at all possible.

[CONTROL ONE]

ok, so bore out the GT TB until you can fit the GTS 'flap' in?

[DYI01]

well I wouldnt put the GT-S butterfly in. If they are a fgood machine shop they should know how large they can safley enlarge the stock GT TB. They should also be able to fabricate a new butterfly for you as well. If you just taper the TB you wont need to get a new butterfly.

[Blue Bomber]

The GT throttle body is way smaller than the GT-S. It's gonna cause some serious restriction on your intake system, even if you bore it out.

[CONTROL ONE]

Originally posted by Blue Bomber
The GT throttle body is way smaller than the GT-S. It's gonna cause some serious restriction on your intake system, even if you bore it out.
you think?

hmmm, so maybe i should just shop around for a pre 2003 GTS TB?

[Boosted2.0]

Originally posted by CONTROL ONE
you think?

hmmm, so maybe i should just shop around for a pre 2003 GTS TB?

Good call.

[trdnerd]

junk yard!!

[monkeywrench]

It will run very nearly the same as with a GTS TB.

[Liqquid]

how about the iac..... is that valve the same or is it gonna make idle freak out... you can tune for that with the pfc, right?

[Blue Bomber]

Originally posted by CONTROL ONE
hmmm, so maybe i should just shop around for a pre 2003 GTS TB? I've got one FS. :DOriginally posted by Liqquid
how about the iac..... is that valve the same or is it gonna make idle freak out... you can tune for that with the pfc, right? I believe you can tune idle with the PFC, so the IAC will be fine, as long as it's clean (tends to get stuck when dirty; oil catch can keeps it clean). The GT and GT-S IACs are different, but I think it's only in the location of the coolant intlets that's different. The gaskets appear to be the same.

[Smaay]

Originally posted by monkeywrench
It will run very nearly the same as with a GTS TB.

Like monkeywrench said it will run fine..the MAFS is before the TB and the piping is stock...you will be fine...

[Blue Bomber]

GT TB = 53mm / 2.08"
GT-S TB = approx 63.5mm / 2.5"

[Tikked Again]

Also, I don't believe you can 'safely' bore the 1zz throttle body