overbored Throttle Body + SC

[Dawgz]

So it had me wondering, why would a overbored throttle body help us if the s\c inlet hole is the same diameter of the oem TB....and the maf (considering u use the OEM maf rather than the supra).

someone give me some insight on this because as i see it, a intake system is basically dependant on the smallest diameter in the system, regaurdless of bigger inlets after or before the smaller Diameter...

[CamryOnBronze]

I was wondering the same thing...

[CASTRO]

because its all for show. when the hype was up, i didnt wanna say anything for fear of getting flamed by the crowds of followers. For s/c'd applications, you can easily gain power by upping boost or freeing up your exhaust. The oversized TB seems like snake oil to me in the 1mz application. Yeah it could help, but i'd wanna see dynos before and after as in my head, you'd get more performance switching to lighter wheels, etc than an old domestic trick where I hear their TB's are somewhat of a limiting factor.

[CamryOnBronze]

^ I can agree that the other mods listed will help more- it would definitely have to be the weak point of the system to have much gain.

[99V6solaraSE]

if im getting what you're saying right, then does your point actually apply to a bigger intake like the 3.5" cpe?

i mean like you said the inlet is smaller before and adapter is used to attach the 3.5" cpe intake.

but apparently the cpe does make some pretty substantial gains .. on a N/A anyway. Have yet to see what it does on a s/c application.

[Eye8Pussies]

^ the reasoning behind that is due to the fact that the cpe unit also changes the afr map- basically it also comes with a more aggressive tune at the same time

otherwise, it's just like any other intake- or more specifically, any other short ram


as for a bored out TB working on either an NA or FI application, I would see making more of a difference on an NA application since the theory works with volume of air going through the TB- so the bigger the better despite restrictions further down the line. with the blower though, I would think that the air that is being sucked in is substantially more than in the NA application anyway and it couldn't use any more
OR on the otherhand, it would free up even more power since perhaps the stock TB is restricting the volume of air coming in....

not sure...anybody want to dyno test this for the rest of us?

[99V6solaraSE]

well thats my point. I happened to already have a bored out TB when i was NA and i am now goin sc.

after i get the sc, im getting a tune so i figured that the bored out TB might actually become a benefit with the tune although the gains maybe minimal. But beneficial nonetheless

[facevedo17]

I beleive Greg has an SC with the bored TB and he has some pretty sick numbers ..plus his other add ons , JP Headers , 8psi boost , Bored SC I think

[CASTRO]

i'd still have to see a before and after dyno comparison. Bored TBs make nice gains for domestics and other cars, but our 1mz isnt like anything else out there. You'd have a bigger improvement going highflow cat or testpipe with an o2 sensor anti-fouler.