ITB's?

[elan_drifter89]

Rather then turbo i have converted to the idea of throttle bodies, has anyone else done this if so how much was it and how are the results?

[kylemorg]

Are you talking about dual throttle bodies mounted to a single intake (one on each side)? If so, there was a company in Australia that was making dual throttle body intake manifolds for the 1.6L Alpha engine back in the late 90's...

Or are you talking about a webber-style quad throttle body setup; one directly feeding each cylinder (no 1 to 4 intake manifold)?

[Cypher]

http://www.rpw.com.au/shop/index.php?page=shop.product_details&flypage=shop.flypage&product_id=787&category_id=144&manufacturer_id=0&option=com_virtuemart&Itemid=31

[bmxdad]

ITB ... Individual Throttle Bodies.

One throttle body for each cylinder. There's a kit out there that uses a Kawasaki throttle body, or some kind of motor cycle TB.

http://www.streetkiaz.com/streetkiazx/uploads/photos/7291.jpg

http://www.streetkiaz.com/streetkiazx/uploads/photos/7292.jpg

[kylemorg]

^ Good find Cypher -- I think that was the company that was prototyping them back in the late 90's, if I remember correctly.

Bmxdad -- I realized that was probably what the "I" stood for in "ITB" after I posted originally. I'd never seen one on a Hyundai / Kia 4 cylinder, though!

[Cypher]

I had spoke to RPW about the ITB back in the day. They were having a special on it at one point and it was a hell of a deal.

[KeWLKaT]

I had spoke to RPW about the ITB back in the day. They were having a special on it at one point and it was a hell of a deal.

Hell yeah... at 1400$... thats nothing! pouah! just dust pennies for us hyundai owners :rolleyes:

[Cypher]

at one point when I had spoke to them, they were clearing it out at $900 :tongue:

[Pete03GLS]

hmm, what kind of performance gains can one see from such a mod? the only thing that comes to my mind... is like having an individual SRI for each clyinder? which could mean even air flow to each cylinder?

[yamaha]

To much work for such a little gain.

[KeWLKaT]

Exactly... The gain is ridiculously low. This is bling more than anything else.

Plus, on these engines you are getting air from the firewall, lol. If you had the intake facing the front, it would be mint.

[XD20GT]

Power gains from ITB's can be pretty good if they are designed and setup properly. why do you think they use them all the time in the racing classes that allow ITB's?

Short inlet tracts give great top end power (longer inlets are better for torque) and the throtle response is amazingly fast. With the throttle opening only a few inches from the head, as soon as the throttle opens, the engine reacts.

[KeWLKaT]

Obviously, but there are a LOT of things to do on the car before you touch those. Such as head, valve, cam, crank, piston, rod, and fuel management work JUST so it can be worth it.

And on a daily driver? Not really worth it...

[yamaha]

ITB's on a stock head setup would be silly. The head and camshaft setup on the cats is what really restricts performance. Do some head porting, polishing, valve job along with some camshafts and THEN you would see some improvements.

[Tommy]

gains? not really.

Sounds awesome? For damn sure.

[bmxdad]

ITB's on a stock head setup would be silly. The head and camshaft setup on the cats is what really restricts performance. Do some head porting, polishing, valve job along with some camshafts and THEN you would see some improvements.

Obviously, but there are a LOT of things to do on the car before you touch those. Such as head, valve, cam, crank, piston, rod, and fuel management work JUST so it can be worth it.

And on a daily driver? Not really worth it...

Wow ... so you guys have already done this??

You really should talk to the owner first, before dismissing this mod. From what I've heard, if your going N/A ... It's more then worth the effort ... PM me if you want a hook up.

[bmxdad]

Here's another setup by HMT

http://homemadeturbo.com/tech_projects/itb/index.html

[jonnyb8419]

i've come to the conclusion that the only mod worth doing on the xd is suspension and the tsb mod (for 5spd drivers) where you take it to the dealer and get the hanging revs fixed (hopefully tomorrow morning). otherwise modding this engine is worthless. my friend's 2004 srt-4 made 289hp on just wastegate, downpipe and afc2. i'm not hating cuz out xd's are really cheap but lets face the facts here as far as engine performance goes.http://www.elantraxd.com/forums/images/smilies/hand.gif

[KeWLKaT]

Wow ... so you guys have already done this?? ^

Actually I've seen such a setup first hand and the owner had an unbuilt engine and ended up selling the kit to some unknown person.

So, yes, in some sort of way, I have done it. :abovelol:

It's totally not worth the money. If built yourself, it's interesting, but I would have to see the power increase on a stock engine to believe it could be highly beneficial.

[BobMs_wht2k2]

OK, so you're going to add the ability to add top end hp at the cost of losing you're low end torque on an engine with a 6300rpm redline, terrible fuel maps, poor headflow and cams that could be mistaken for a Model-T. Sounds like it's gonna be awesome. At least 50hp.

The cars that have done these types of swapson race cars already have headwork, cams and pcm tuning to benefit from it. I know the Swiffer GT's have a conversion to switch to 4 weber carbs. With no other modifications it gains 1hp and loses 7 tq IIRC. Change cams, head port and exhaust work and it picks up 20hp.

[2003GT]

Hey BMXDad on that intake video will my car sound like that with just a cone on the end of the Stock Piping or do I need to Delete the Resonator. BOB

[yamaha]

Wow ... so you guys have already done this??

You really should talk to the owner first, before dismissing this mod. From what I've heard, if your going N/A ... It's more then worth the effort ... PM me if you want a hook up.

No, I haven't seen ITB's on a Hyundai, but it's like comparing apples to oranges. Our motors do not breath well. Even with a CAI, headers, a full exhaust, the head is still very restrictive. It would be hard enough to get it to run, let alone the MAF based crowd would not be able to run this. We don't have Honda's here, where a few bolt-ons can net a decent gain.

[RTPScoupe]

My tuner guy (he is a honda guy btw) told me this wouldn't even be worth while on a honda that doesn't rev over 9000rpm.

[BobMs_wht2k2]

What this gains is upper rpm breathing. It's why 4cyl inline motorcycle engines use these. Most new(er) sport bikes rev into th 13-15k rpm range. When ours makes but a 1/3 of those rpms AND is tied to 2800lbs of steel and aluminum it needs the longer intake track to promote a fatter torque curve.

Yes it would look awesome. No, it's not a very practical item.

[RotaMan99]

Actually I've seen such a setup first hand and the owner had an unbuilt engine and ended up selling the kit to some unknown person.

So, yes, in some sort of way, I have done it



Something is not quite right about what you said.....

My tuner guy (he is a honda guy btw) told me this wouldn't even be worth while on a honda that doesn't rev over 9000rpm.

This is why actually having intake runners is helpfull to shift the increased power band lower in the usable range. Slapping them on the engine like it is in the pic above is not the best unless you have built the engine to take advantage and even open up the high rpm power band.

[elan_drifter89]

Wow ... so you guys have already done this??

You really should talk to the owner first, before dismissing this mod. From what I've heard, if your going N/A ... It's more then worth the effort ... PM me if you want a hook up.

I want the sound mostly but the improved response and the uniqueness of the mod makes it look fun and i need a weekend to work on the car. besides with the title still under my dads name I cant go full out boost so this will work...for now.

[BobMs_wht2k2]

If you're planning on boost in the future, why would you waste this much money to lose power?

[KeWLKaT]

Well it's not ''guaranteed'' that he will LOSE power, but I agree that it's a waste. Then the piping will be a pain when the time comes to boost, hahaha.

[BobMs_wht2k2]

You WILL use usable torque. No doubt about it.

[kylemorg]

I think this is a reasonable summary:

1. the stock single intake manifold is not the biggest bottleneck in engine performance, and
2. changing it out has other drawbacks (loss of low end torque, tuning challenges, 4 MAF or MAP sensors, etc).
3. You'd be best off spending your $ elsewhere, especially if you're planning on going forced induction at a later date; BUT
4. If you're set on it in spite of the advice against it, do it and let us know how it goes.

[agdaniels]

the intake and exhaust restrictions aside, would an ecu piggyback or reflash un-suck our internals or is it physical limitations

[Munky]

Just a thought...what if you had some sort of functional scoop like Kylemorg has, and had the four throttle bodies routed up to the scoop, with a filter in between? (Kinda like the scoop on the older turbo'd Mustangs)

[Pete03GLS]

our internals dont suck... its just a crappy tune. but obviously, theres always room for improvement. anything u do to the engine, that will change power bands and what not... will require an ecu tune, so that the engine as a whole can maximize performance, from all given mods. so basically, the ecu tune, is the core, once ecu tuning becomes alot more attainable and ****... u will see alot more pioneers and new mods coming out.

[elan_drifter89]

Well it's not ''guaranteed'' that he will LOSE power, but I agree that it's a waste. Then the piping will be a pain when the time comes to boost, hahaha.

I've abandoned my boost dreams at the moment true a turbo elantra with a clean exterior raises the bar and re defines the term Sleeper I will be entering the college wold next year and as such money will be as rare as a good "fast and the furious" sequal.

[KeWLKaT]

Just a thought kyle, you won't need 4 MAP sensors, just hook up the MAP to something such as a box where 4 vacuum lines go, where they hook um downstream of the TB plates on each of the throttle bodies.

That's how the guy with the accent had it hooked up, also the most intelligent way.

For the MAF, that, you will have a problem. The solution would have to be really ugly.

[PSUsouthpaw]

I've abandoned my boost dreams at the moment true a turbo elantra with a clean exterior raises the bar and re defines the term Sleeper I will be entering the college wold next year and as such money will be as rare as a good "fast and the furious" sequal.

Just because you are in college doesn't mean you have to give up your dreams.

You just need to approach it with much more care and delicacy.

[agdaniels]

^^ exactly. quite a few of us are in college and still find some extra money/time to better our cars.

[mtlelantra]

or really rich parents

[BobMs_wht2k2]

BUT. . . if you are a college student with limited funds and the Elantra is your ONLY means of transportation, I would HIGHLY advise keeping it simple until you're done with school. Getting waist deep into a project, rendering your only mode of transportation useless is an expensive lesson to learn. Be forewarned and use your head to think through what you're doing.

[agdaniels]

rich parents? well they do alright, but i pay for my car myself. just means you need a job ;)

and bob i agree, but that still leaves i/h/e, audio, suspension, exterior and interior appearance... plenty to keep us satisfied.

Or you could just be like felix and do every mod imaginable.