Independant Throttle Bodies (ITB's/IRTB's)

[flat_black]

I'd like to know how they expect that to run with the stock OBD-II ECU. Heh. It has no EGR passage, as isn't (At least in the picture) using a plenum that would facilitate the MAF. With very few exceptions, there's no such thing as a Plug-and-Play ITB kit, really.

Granted, on that picture, it's a Ford Tierra, so I'm guessing it actually won't work on US spec engines.

 

[Gen1GT]

Wow, that price is unbelievable. I'm jealous. It's possible to have a plug n play IRTB kit, as long as it comes with a plenum.

 

[xelderx]

Wow, that price is unbelievable. I'm jealous. It's possible to have a plug n play IRTB kit, as long as it comes with a plenum.

Thats true...that would allow you to use the MAF right? Hmmm, this kit doesn't list a plenum, but one could be easily fabricated.

Wait...Stage one says surge tank....that sounds like a plenum. I would like to see pictures of that.

 

[mp3moose]

Do they have pics of the stage 1? It says it has 4 TB's in an intake manifold. So it must have a plenum and hopefully, an egr hook up.

 

[Boston5761]

link???

 

[xelderx]

Do they have pics of the stage 1? It says it has 4 TB's in an intake manifold. So it must have a plenum and hopefully, an egr hook up.

The EGR is not much more than a valve bolted to a flange on the manifold. I would really really really like to see a picture of the stage 1 kit with the plenum. if it is roughly in the same location as the stock manifold it can be modified to accept the stock EGR.

 

[mp3moose]

The EGR is not much more than a valve bolted to a flange on the manifold. I would really really really like to see a picture of the stage 1 kit with the plenum. if it is roughly in the same location as the stock manifold it can be modified to accept the stock EGR.

Exactly....

If this actually works with the stock ecu I would pick it up in a heartbeat.

 

[khaosman]

SWEET! Sign me up for one of those bad boys, once I save some money.

 

[Boston5761]

i couldnt find anything on aai or buddyclub websites.

 

[flat_black]

The EGR just needs to see flow. But that's still a vac leak, once you get a plenum involved. At any rate, you'll find that a 'Plug and Play' set of ITB's will experience a few problems to say the least. It runs EXTREMELY lean at some points and EXTREMELY rich at others, like my first set that I built ran. Good luck to those who try it, though!

 

[POSEIDON]

No way that will work on a stock ecu. You'd have be running management to even think about doing ITB's. Looks nice though. Good ol' sock filters.

 

[flat_black]

Sock filters. =) I have some 45mm socks downstairs, but I have to order some 50-52's for my new setup. Wish I had a camera, now, though. =( My old one is totally dead, now.

 

[khaosman]

Whoa, I was looking at those again because they were so hot. But dang, under $2k WITH EMS? Sweet! I want it so bad... get to stay NA, get more power, and considerably cheaper than turbo!

Also, xelderx, any idea what class that'd put us in autocrossing?

 

[Boston5761]

what whp would this put out?

 

[xelderx]

The EGR just needs to see flow. But that's still a vac leak, once you get a plenum involved. At any rate, you'll find that a 'Plug and Play' set of ITB's will experience a few problems to say the least. It runs EXTREMELY lean at some points and EXTREMELY rich at others, like my first set that I built ran. Good luck to those who try it, though!

Those fuel probems can be fixed with a piggy back like the MPI though, couldn't they?

 

[flat_black]

Well, there's some extreme changes to the fuel curve around 5250 rpm, and at 4800, and below 1500 RPM, at tip-in, and the timing/fuel changes at low throttle make the car VERY hard to control at lower RPM... In other words, I don't know if a piggyback would cut it, but it may be worth a shot. =)

 

[xelderx]

Well, there's some extreme changes to the fuel curve around 5250 rpm, and at 4800, and below 1500 RPM, at tip-in, and the timing/fuel changes at low throttle make the car VERY hard to control at lower RPM... In other words, I don't know if a piggyback would cut it, but it may be worth a shot. =)

Good info...wouldn't having the plenum make the ITB's a little easier to control with regards to these extreme jumps in A/F?

 

[flat_black]

Not really, no... The reason being is that tip in on ITB's is very sharp; The throttle being open only marginally still allows for WAY more air to rush in than the original throttle body and plenum design, which leans it out, then later in the throttle position, it richens up like crazy, probably overcompensating, then when the VTCS kick in (5250)... There's a lot of changes in flow and velocity durring the normal operation of the manifold; Smoothing that out for the ITB's would yield a lot more gain, I would imagine. I still need my standalone. =/

 

[Rogue]

Not really, no... The reason being is that tip in on ITB's is very sharp; The throttle being open only marginally still allows for WAY more air to rush in than the original throttle body and plenum design, which leans it out, then later in the throttle position, it richens up like crazy, probably overcompensating, then when the VTCS kick in (5250)... There's a lot of changes in flow and velocity durring the normal operation of the manifold; Smoothing that out for the ITB's would yield a lot more gain, I would imagine. I still need my standalone. =/

I thought VTCS was just for cold start ups, and VICS is what opened up at higher RPMs

 

[flat_black]

Wow, thwarted on something I usually correct others on! Yes, VICS, not VTCS. ****, no more drinking for me, tonight.