I am always putting another part on my car, or anticipating the next piece. I just put in a new grill and cf seibon hood and I'm ready to make the next move. I have a injen CAI and magnaflow catback exhaust and I love the sound. I was thinking of doing a throttlebody and extender since I heard that adds a nice 'turboish' sound to it, and will have a small gain in throttle response and hp. I don't want to do headers since all i ever hear are complaints about rasp, even though that would add some nice asthetics under the hood.

Can't seem to find a throttle body for the tC however. Anyone know where I can find one, and any input or ideas would be appreciated.

Descendant Racing makes one, but you won't find any gains from it. It will look nice under the hood but it prices at around $400. Not worth it IMO, unless you were turboed. That's when you'd see gains.

Yea the throttle body is already the perfect size for N/A air flow. Unless you did an intake manifold it wouldnt help. And even in that case manifold+ throttle body will be like $1000? for 10hp? money better spent on headers and upgraded resonators. If you get good resonators you wont have to worry about much rasp.

Just making sure... you did mean an actual throttle body correct? Or did you mean a throttle body spacer?

nobody makes a throttle body for the tc

nobody makes a throttle body for the tc

thats why I ask... I couldnt find one. Including Descendant

pretty sure he was talking about the intake manifold.

Well either way the descendant intake manifold is like $600. But it has short runners so its only good for forced induction.
So rumple... your options (assuming you want to stay N/A and not tear into the block), are intake manifold (with long runners), or headers lol. Im pretty sure this question has been asked 100 times before... sooooo dont be surprised if some haters get on here mad that you didnt search thoroughly.

75 shot

I was looking for a throttle body since I heard I would get better throttle response and a little bit more hp. From researching a bit it seems that all I need is the extender and OBX makes one I can get for like $50. Apparently thiers creates a vortex in the induction making a better mixture of air and fuel, and will get better gas mileage and more throttle response, and save me about $300 since I can't get the full throttlebody anyway.

I am still interested in getting the headers with a resonator. I wasn't aware that different resonators will give difference response. Is there somewhere I can get just the resonator? I already have the catback, and dont really want to get another one. I also prefer the 4-2-1 headers, but it seems that they will always come with a downpipe attached, with no catalytic converter. I want the resonator and the cat still.

Any suggestions?

throttle body spacers are junk, they do nothing but make a cai whistle more. There was someone on here and they dyno tested one and they actually lost 1 hp with it. It might improve gas mileage but i doubt it.

Good info on this thread . This will sound novice i know but , if you dont ask....right ?
So is there any point in changing the throttle body or the intake manifold (not doing turbo or supercharger . Im looking for power gains . by forced induction , it was meant as ram air or cai or both ? Are there option for throttle bodys and intake manifolds not turbo or supercharger ? Also what the heck is a resonator ?

OB1 (original box 1st g)

for other cars intake manifolds and throttle bodies work great. Honda's see good gains from them and seem to be better suited to N/A builds. The drive by wire i believe limits the capabilities of the throttle bodies and companies that make intake manifolds haven't given any proof that they actually give significant gains. I know a few people that had them on F/I apps were have problems tuning with the aftermarket intake manifolds.

Gude DOES make an aftermarket larger Throttle body, or at least it's for sale in their "head kit"

Source:
http://www.fastscions.com/gude-performance-scion-2azfe-cylinder-head-package.aspx

I've never seen anyone use it though, and there is no mention of it for sale separately.

-Sean

i wish the tuner world had more people that were educated instead of buying into ridiculous claims.

Gude DOES make an aftermarket larger Throttle body, or at least it's for sale in their "head kit"

Source:
http://www.fastscions.com/gude-performance-scion-2azfe-cylinder-head-package.aspx

I've never seen anyone use it though, and there is no mention of it for sale separately.

-Sean


it's not aftermarket, that's stock and ported

Good info on this thread . This will sound novice i know but , if you dont ask....right ?
So is there any point in changing the throttle body or the intake manifold (not doing turbo or supercharger . Im looking for power gains . by forced induction , it was meant as ram air or cai or both ? Are there option for throttle bodys and intake manifolds not turbo or supercharger ? Also what the heck is a resonator ?

OB1 (original box 1st g)

You could try a new intake manifold but I havent seen a naturally aspirated one thats worth its salt.
Forced Induction= turbo or supercharger
Ram air (hot air lol) and cold air are just intakes... nothing more
A resonator is like a muffler, but you weld it into the midpipe usually, not at the end. It reduces the exhaust sound and rasp.

I was looking for a throttle body since I heard I would get better throttle response and a little bit more hp. From researching a bit it seems that all I need is the extender and OBX makes one I can get for like $50. Apparently thiers creates a vortex in the induction making a better mixture of air and fuel, and will get better gas mileage and more throttle response, and save me about $300 since I can't get the full throttlebody anyway.

I am still interested in getting the headers with a resonator. I wasn't aware that different resonators will give difference response. Is there somewhere I can get just the resonator? I already have the catback, and dont really want to get another one. I also prefer the 4-2-1 headers, but it seems that they will always come with a downpipe attached, with no catalytic converter. I want the resonator and the cat still.

Any suggestions?

Dont listen to that "Vortex" bullcrap. We are fuel injected so any kind of fancy stuff inside the intake is unnecessary. That stuff really only workes for big carbourated engines.
And yes you can buy just a resonator. There is a big difference between a "hot dog" resonator and a wide one though. Wide ones are like the "cure all" haha. A hot dog is a waste of money in my opinion, they bearly do anything.
4-2-1 is a good choice for N/A. Thats what ive got. If you got headers it would get rid of the cat(thats a good thing for power).

Dont listen to that "Vortex" bullcrap. We are fuel injected so any kind of fancy stuff inside the intake is unnecessary. That stuff really only workes for big carbourated engines.
And yes you can buy just a resonator. There is a big difference between a "hot dog" resonator and a wide one though. Wide ones are like the "cure all" haha. A hot dog is a waste of money in my opinion, they bearly do anything.
4-2-1 is a good choice for N/A. Thats what ive got. If you got headers it would get rid of the cat(thats a good thing for power).

Ummmmm...... Irish dude sounds like he knows what he is saying and not just repeating what he has heard . I hate nothing more than stuff advertised to do this or that . Fuel injected negates a lot of the older tech mods and also the xb being a small 4 banger , not all upgrades or mods make a difference like the same mod in a 6 or 8 banger . I am novice for sure but I know enough to weed through advice . You guys who know keep it up , thanks .

Thnks man, I try lol.
But I definitely agree with DJ about the throttle extender. You will more likely lose power. Cause your just causing turbulance in the intake... which is exactly what your trying to eliminate.
BTW I love most of Weapon-R's stuff (have their header) so Im not bashing them, but their little Secret weapon intake does the same thing. One pipe inside another? Its just creating more surface area the engine has to push through. More "vortex" bull lol.
Oh and I forgot resonator install. Just cut out a section of your midpipe and weld it in. You could also have someone do it, should be cheap cause its pretty easy.

it's not aftermarket, that's stock and ported

Sorry I wasn't more clear, it's been modified from stock, it is no longer an OEM throttle body In my opinion.

Regardless it exists, will it help on a stock engine? I'm doubtful.

-Sean

:ponder:So Mr.Irish dude(or any one) ....I got AEM cai and a TRD exhaust (witch I'm told it adds NO power gains and it DOES add power gains) I am about to get a header , weapon 4-2-1 is what I'm set on . What would you(or any one) suggest for an exhaust pipe size and or cat and or resonator . If the TRD exhaust adds nada then it is out . If it adds then cool , what else adds power gains from header back . Before you suggest though , I'm not doing turbo or supercharger . Thanx dudes and dudetts .

Chuck Norris for president of Texas !

The TRD axleback might add like 1hp. But its not a straight thru muffler so thats not good. To me it wouldnt be worth the money.
One rule about fluid flow is to keep the pipe size the same. Sudden expansions or contractions in the system cause turbulance. I think the WeaponR s-pipe is 2.25in. Either 2.25 or 2.5 are good diameters for N/A flow. Boosted guys usually step it up to 3in.
I used the Vibrant Performance Ultra-quiet with my weaponR header. It gave it a nice rumble. But I dont have any experience with high-flow cats... I just got rid of both of mine.

There seems to be a agreement from a lot of peeps on the 2.25 (if not running turb or charged). Sounds like my next step after my weapon header is to re-do my exhaust . So a staight through muff is better for gains , and what run 2.25 the whole way and just take my cat out ?

I have the TRD muff , sounds good but w/o power gains what the _____ is the point .Why even make a product that sounds like a perform muff and it is not just pretending..... They could of said that on their product descript.

There seems to be a agreement from a lot of peeps on the 2.25 (if not running turb or charged). Sounds like my next step after my weapon header is to re-do my exhaust . So a staight through muff is better for gains , and what run 2.25 the whole way and just take my cat out ?

Yes straight through everything is better for power. The sacrifice is that it doesnt have as much sound reduction. But, if you get good brands like vibrant, it can still do a number on rasp and sound.

Yes straight through everything is better for power. The sacrifice is that it doesnt have as much sound reduction. But, if you get good brands like vibrant, it can still do a number on rasp and sound.



Legal with emission ? Except Cali cuz nuttn is legal there emission wise .

No thats the other bad news. if you take out the cats you wont pass inspection. Just keep your stock midpipe and switch it back in the day your getting inspected... then switch it back out afterwards. I went to the hardware store and got stainless steel bolts and nuts to make this easier. Usually they just give you galvanized steel with the exhaust kits, which tends to sieze up. At least mine did... F*ing NY winter lol.

No thats the other bad news. if you take out the cats you wont pass inspection. Just keep your stock midpipe and switch it back in the day your getting inspected... then switch it back out afterwards. I went to the hardware store and got stainless steel bolts and nuts to make this easier. Usually they just give you galvanized steel with the exhaust kits, which tends to sieze up. At least mine did... F*ing NY winter lol.

Yea the mechanic bud I got, that helps me with phone support when I'm doing mods , told me first thing when talkn about exhaust " make sure you get stainless steel nuts n bolts cuz they freeze bad " . Where do I find the bolt up exhaust lines that will fit my box ? I dont need muff and I guess I would have to be able to bolt my old cat back up too . Also what does takeing out the cat do to gas mileage ?

NY winters are why I live in 113 degree temp w/99% humidity...that and if I get in below 80% humidity I dry up like a horny toad . Go Texas

not sure what you mean by bolt up exhaust lines... but I feel like im getting better mileage. Taking the cats out definitely reduces the amount of work the engine has to do to push out the exhaust gases. Big reason you get more power, and you should get slightly better mileage too.
That rule doesnt apply to the other side of the engine tho lol. Add an intake, and still drive in the same RPM range... you will get worse mileage.

"not sure what you mean by bolt up exhaust lines... but"
Maybe instead of line , would pipe make more sense ?

My buddy was telling me about exhaust pipes pre fitted that bolt , instead of weld , together . Am I making any sense ? I can't tell .

I think I can cover the two possibilities lol. If you mean when installing the resonators, you can butt weld the ends together or use sleeves to get perfect allignment.
If your talking about installing the pipes to the car, you just bolt them together. When you get under the car you'll see how it all fits together. I bet most kits dont even include instructions its so self explanitory lol.

yes man the throttle body spacer probably wouldnt do you any good irish is right.
i think how it works is that when you have a car with a carburetor the fuel is just put in and it needs the air to mix it so a spacer swirls the air around in a circle and helps mix the fuel before combustion. in an electronic fuel injected car like ours the injectors spray a perfectly mixed very fine mist of fuel into the air before combustion. so the swirling of the air does no good and may even cause it to perform worse.