first off, i was just a little curious as to what the purpose of ITB's were

obviously four 65+mm throttle bodies compared to just one of similar size would be... well... theoretically 4 times more effective mathematically, but what is the sheer advantage of using them?

also, what factors are involved with making them vs. tuning them to what you want them to do for your power (and torque) spectrum

 

4 65mm tb are not goign to work to good for a 2.2 ....but most common sizes are 50mm per , and with out good supporting mods there isnt as much power as there could be .

the purpose for them is increased throttlr responce , usually more midrange power and of course the sound ....lol

they are just less restrictive in general

 

TWM 52mm. Tough to tune though. and don't use them on purely a stock engine, they work best with higher compression and more agressive cams.

 

hows the low end power with itbs?

 

you could put together a smaller mm itbs setup if you were to use on a daily setup like a gsxr 1000 or 1300 series.

 

Isn't the AIM with ITBs moreso High End power? I kind of thought that low/mid power would be sacrificed with ITBs.....
This is something I have always thought would be a nice setup.....ITBs inside a chamber......In theory it would have the High End of the OPEN ITBs but not suffer any low/mid power loss. Who knows though...

 

depends how they are setup, but ITB's will/should gain a shitload from mid to top....not just top.

 

thats one weird looking ibt never seen thoses ibt before

 

they are TWM with an enclosure.

http://www.jenvey.com

go to the advice and faq section section.

 

i've heard many times that itbs are hard to tune, but i've never heard exactly why. i would think if you have hondata, crome or some other ems and some time on a dyno, it shouldn't be that hard, right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">depends how they are setup, but ITB's will/should gain a shitload from mid to top....not just top.
</TD></TR></TABLE>

I guess we should be on the same page as far as whats what.
What do you consider MID? 4-6000?
Top? 6000-9000?
Do you think ITBs would shine before VTEC? I'm asking because I have spent as much time reading about ITBs as I have about body kits/wheels.&lt;&lt;--1%
Sub 4000-4500 means nothing to me for the most part. Even corner exit on the RR course is 4500+...Redline shifting never drops me below 5000. Even Drag Racing, such a minimal amount of time is spent sub-5000.
Man, where are these Before and After ITB Dynos when you need them?!?!

 

I use ITB's because of its smoother powerband as opposed to plenum. Through my experience on the dyno and on the track...... there seems to be more usable power and there are more gains mid to top than my graph using plenum. Just my 2 cents

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotorRandy &raquo;</TD></TR><TR><TD CLASS="quote">I use ITB's because of its smoother powerband as opposed to plenum. Through my experience on the dyno and on the track...... there seems to be more usable power and there are more gains mid to top than my graph using plenum. Just my 2 cents </TD></TR></TABLE>

where do you feel like they start to shine compared to the plenum? Could a well-built plenum ever compare to ITBs?

 

What would be considered a well built plenum? IPS? Skunk2? As far as drag racing goes..... im a big fan of a broad power band. And to get to that power band, bigger ITB's along with a ram air manifold is the way to go. Just look at all the fast all motor cars out there...... Lookofsky, Skunk2, Leslie Durst........

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotorRandy &raquo;</TD></TR><TR><TD CLASS="quote">What would be considered a well built plenum? IPS? Skunk2? As far as drag racing goes..... im a big fan of a broad power band. And to get to that power band, bigger ITB's along with a ram air manifold is the way to go. Just look at all the fast all motor cars out there...... Lookofsky, Skunk2, Leslie Durst........ </TD></TR></TABLE>

I agree. RLZ built a plenum manifold for my roommate's car and it made sick power up top, and that isn't to say that it doesn't make good midrange power, but I do believe an appropriately sized set of ITBs would make a fatter tq band in the midrange.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotorRandy &raquo;</TD></TR><TR><TD CLASS="quote">What would be considered a well built plenum? IPS? Skunk2? As far as drag racing goes..... im a big fan of a broad power band. And to get to that power band, bigger ITB's along with a ram air manifold is the way to go. Just look at all the fast all motor cars out there...... Lookofsky, Skunk2, Leslie Durst........ </TD></TR></TABLE>

As far as a well built plenum I guess I had the above mentioned RLZ in mind or someone elses sheet metal'd plenum.....
Like I said....pretty clueless with ITBs....