Throttle body upgrade - stock engine?

[blacktop]

Will a bored throttle body increase power on a stock engine?

I understand that it should be accompanied with an exhaust and all that jazz, but i want to know if it will be possible for a power increase with a stock engine and exhaust or will you just get an increase in throttle response?

[ed]

you just get an increase in throttle response.

9876543210

[blacktop]

but surely as there is more air there is more power, you will loose some mid range power but you should gain power in high rpm

[ed]

there isnt more air, theres just a bigger hole for the same air to flow through

[blacktop]

but the air acting through the Venturi would increase air flow would it not?

[lojik]

It will surely depend on whether the stock throttle body is a restriction in the intake path.

[ed]

random words put together do not make sense? venturi what?

if your engine doesnt consume more air (ie stock guts), the throttle body size will change nothing other than the rate at which it goes to wot = response

the throttle body is not a limiting factor

[ed]

It will surely depend on whether the stock throttle body is a restriction in the intake path.

which it almost certainly isnt
port velocities in the manifold runners will likely kill things well before the throttle does, and considering stock cams/heads/manifolds etc etc etc i doubt youll even get there

[blacktop]

does the venturi (tappered design for better air flow) not make it flow faster/harder thus allowing more air to pass through the larger throttle body

air transfer? or something

[ed]

if i give you a bigger better straw, will you drink your can of coke faster and faster, or will you just drink it at a rate to which you can swallow to keep up

the straw is not the problem if you cant swallow the stuff, doesnt matter how damn good the straw is.

if you cant get my point by this post, im giving up!

[blacktop]

I understand what your trying to say, and i don't want to piss people off i just want the facts, as i have very reputable people telling me 2 different stories, and i just can't decide, it mostly depends on restriction within the breathing system but who is to say that most if not all manufactures don't go for smaller TB's to save on costs and get the ml more fuel econenemy and anti pollution gear

[Cuts]

i dont reckon a smaller tb is going to effect costs too much, or efficiency, or polution gear.

its go give a good balance between everything they want, mid range snort, high rpm power, good throttle control for smooth running (bigger throttle bodies can have negative side effects in how smooth an engine is.

Like has been said if thats the biggest restriction in the inlet path then yes you might get a small benifit, but if you still cant get the gasses out then you wont get any gain.

if the engine is unmodified there is no point, spend you money elsewhere go get real gains

And the quads on 20v engines flow enough for bigger capacity engines so i dont think you need to change them.

[Kyosho]

If at WOT at peak revs, your at atmostpheric pressure after the TB, then it's not a restriction.
Move on, forget about it.

[blacktop]

cool, and thanks for all the reply's, like i said i just wanted the facts.

its not for me, its for a JDM DC2R B18C with a 62mm TB from factory.

[wilbo666]

Why don't you get a differential pressure gauge and measure the pressure drop across the throttle body at WOT? (As Kyosho suggests also).

I suspect close to none...

Cheers
Wilbo