i have a spare throttlebody from a corolla kicking around. i'm gonna check to see it's compabibility (fitment-wise) with the 1NZFE, and if it'll squeeze, i'll be installing it, in conjunction with the Injen intake for the Corolla..

i'll let you all know the results..

~joel

ok thanks

I saw something about replacing this item when I was looking at a focus. Not being a car guy be interested in knowing what will replacing the throttlebody accomplish or suppose to accomplish?

on a relatively small engine like the 1.5, and not force-induced, id say, very little gain..

in conjunction with a polished intake manifold and ported/polished head, i'm pretty sure you'd see gains around the 15HP area.. maybe more, depending on the head job.


oh, it accomplishes this:

more air

on a relatively small engine like the 1.5, and not force-induced, id say, very little gain..

in conjunction with a polished intake manifold and ported/polished head, i'm pretty sure you'd see gains around the 15HP area.. maybe more, depending on the head job.


oh, it accomplishes this:

more air


okay then why are you wanting to do it then?

It is going to be difficult to fit the new throttle body over the existing one, unless you fabricte something to hold it in place, becuase there is no way that it is going to be a direct bolt-on...good luck though...

It is going to be difficult to fit the new throttle body over the existing one, unless you fabricte something to hold it in place, becuase there is no way that it is going to be a direct bolt-on...good luck though...

"fit over" ???

what?

i'd be replacing the throttle body, not "fitting over" it


i'm pretty sure it won't be a direct bolt on..

on a relatively small engine like the 1.5, and not force-induced, id say, very little gain..

in conjunction with a polished intake manifold and ported/polished head, i'm pretty sure you'd see gains around the 15HP area.. maybe more, depending on the head job.


oh, it accomplishes this:

more air


okay then why are you wanting to do it then?

FREE HORSEPOWER..

how can you go wrong there? :D

I didn't mean fitting it over, wrong wording...placing the new one on is more what I meant to say...

I am not dissing on you, I am quite interested in how this comes together. Take some pics if you get a chance. BTW: Where do you get the Corolla Throttle Body from?

Its only free horsepower if it actually fits...meaning lining up to the bolt holes....plus dont forget to open up the intake port to match the same size....plus whats the size different between the 2 anyways?????

1/2" diameter difference i believe..

37% increase in airflow capability.

i love cynics.. i'll let you know how it turns out..

oh, and the labor is free, the parts are free, and whatever adaptor i build to bolt it on will be under $10..

so technically not "free"

BTW: Where do you get the Corolla Throttle Body from?

i had an '02 corolla.. picked up a free throttlebody.. and intake manifold..

so now that the corolla's gone, and i have the parts... i'm set..

oh, and btw, the rotors are almost interchangeable.. i'll be fitting a spacer on the wheel anyway, so i'll just mount it behind the rotor, and use my Rotora's off the corolla

aren't you going to get a check engine light by changing this out?

El Prototype was already making them last year for the echo and than marketed them to us. But they stopped because there was a problem that was being attended to. Something about how the inside of the throttle body is oval shaped and the butterfly wasn't working correctly. Not sure its a good idea to use a corolla throttle body if other companies are having problems with the OEM trottle body boring it out. :shock:

aren't you going to get a check engine light by changing this out?

NO, why would i? i'm not removing or replacing any sensors... just moving more air.

..... Something about how the inside of the throttle body is oval shaped and the butterfly wasn't working correctly. Not sure its a good idea to use a corolla throttle body if other companies are having problems with the OEM trottle body boring it out. :shock:

using a larger OEM part is much different than boring out a stock-sized OEM part.

hmm... i may be wrong, but i think the companies making intakes use the smaller diameter piping because too much air causes the check engine light to come on... maybe it wouldn't matter cause this is after the maf sensor. try it and let us know :P

aren't you going to get a check engine light by changing this out?

NO, why would i? i'm not removing or replacing any sensors... just moving more air.

But if the sensor isn't reading the air correctly, check engine light city! :shock:

Hello All,

Here is the deal with larger throttle bodies. The intake manifold is the problem. The flange which the TB (throttle body) is mounted onto is not flat. Its only flat spots are for the three mounting studs and the sealing oring. The oring is not round, it is in a very odd shape. You have to take it off to see what I am talking about. Anyway, if you enlarge the factory TB the oring will get sucked into the manifold and cause a leak. You cannot enlarge the hole behind it because the port is only 2mm thick. Break through that and you suck air in from around the outside of the TB. The corolla TB you speak of will bolt on but will suck in the oring and have a big air leak. We tried to make an adaptor plate and we eliminated the leaks,BUT the hole was still factory size and that made no HP. We are making a new manifold now with a larger TB and hope the power gains are there. We are conscerned that the aluminum will heat soak the intake charge and cancel out the gains. Guess we will find out.


ELP

awesome, can't wait to get rid of the plastic... heh... it looks cool, but having some metal piping would look better :D

...............We are conscerned that the aluminum will heat soak the intake charge and cancel out the gains. Guess we will find out.

don't know if you remember, but the older (98-02) corolla's had an aluminum intake manifold... not sure if it was any good lol, but it didn't seem to be too big of a problem.

hope your project gets done this year :lol: seen so many "projects" from you guys fall by the wayside..

ELP,

Have your prototype manifold ceramic coated to keep the heat out. It works great on notorious carb boiling drag racers. It can even be done in different colors!!

ken

ELP,

Have your prototype manifold ceramic coated to keep the heat out. It works great on notorious carb boiling drag racers. It can even be done in different colors!!

ken

That would be cool, but probably raise the price for different colors. Just keep it one color and keep it cheap. You us scion owners, bunch a cheap asses!! :lol:

DUH :!: The plastic intake manifold is far better than a equivelent aluminum intake even if its ceramic coated. Plastic will deliver a much cooler intake charge. It really does not matter anyways all bolt-ons combined are only going to give a scion about 12 h.p@peak rpm (MY GUESS) Ihave a Ingen Long intake?exaust looks good and sounds good,but it absolutely reduced lowspeed acceleration :roll:

Trust me, this engine is capable of much more than anyone on this site thinks. With the currently avialable bolt ons we are limited but when I look into my crystal ball I see a 150hp N/A Scion on the road in the next year.... It won't be mine though, my wife won't let me have it long enough to do much to it. The technology will catch up eventually. A properly designed and developed header/exhaust will give more than 12hp gain... A better intake manifold, slightly larger throttle body, a better intake filter/pipe and slightly larger injectors and you would be nearly there. It would require an AFC to correct the MAP sensor output so the ECU could deal with the extra air flow.

ken