larger throttle body
05-26-2004, 01:28 PM
#1
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larger throttle body
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
i'll let you all know the results..
~joel
05-26-2004, 02:30 PM
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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
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
05-26-2004, 02:34 PM
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Originally Posted by CivicEater
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
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?
05-26-2004, 02:37 PM
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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...
05-26-2004, 02:49 PM
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Originally Posted by BlueScionXB
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...
what?
i'd be replacing the throttle body, not "fitting over" it
i'm pretty sure it won't be a direct bolt on..
05-26-2004, 02:51 PM
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Originally Posted by dinkjs
Originally Posted by CivicEater
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
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?
how can you go wrong there? :D
05-26-2004, 02:54 PM
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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?
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?
05-26-2004, 02:54 PM
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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?????
05-26-2004, 03:05 PM
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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"
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"
05-26-2004, 03:12 PM
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Originally Posted by BlueScionXB
BTW: Where do you get the Corolla Throttle Body from?
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
05-26-2004, 03:39 PM
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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. 
05-26-2004, 03:54 PM
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Originally Posted by Stylis
..... 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.
05-26-2004, 04:01 PM
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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 
05-26-2004, 10:33 PM
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Originally Posted by CivicEater
Originally Posted by tbblizzard
aren't you going to get a check engine light by changing this out?
05-31-2004, 06:26 PM
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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
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