Need some advice here folks,

I have seen some 50mm TWM ITBs.. now im not sure how effective they will be on my motor, ive searched and read some good things about them and also not so good... here goes.


My motor

b18C
84 x 89
wiseco 12:5 forged pistons/rods
BC4 camshafts

basically a fully rebuilt motor, new internals, suer tech valve train etc
Hytech Header

Hondata s300

what i need to know is,

what kind of gains will i see with the ITBs on a good map?

how well will the ITBs work with my Motor with the compression above?

how will the ITB effect daily drive?

Is it good idea having ITbs on a daily driven Motor?

any other information more then welcome!

 

most of the gains you will see in mid-range power... and you'll see a great improvement in throttle response

i hope your block is sleeved running that high compression

ITBs will work fine on a daily driver... but your motor will react/run very different in different temperatures and humidities... you should run a filter setup definitely, and i'm not talking about those little sock filters.. you need a framed filter setup like ITG or something to keep the filter material farther away from the velocity stacks... that way the filter doesnt obstruct the air flow coming in from the sides

hope that helps some

 

don't need ITB's...my motor puts down more whp than most ITB setups i've seen. I'm running the JG Victor X manifold. You'll see better throttle response and low/mid range power from ITB setup. They are also a little bit harder to adjust/idle. Hope this helps out

 

you can make the same if not more power with a properly sized tb/manifold setup. and still retain good driveability. with itb's you have to have someone that know's how to tune itb's or you'll be stuck with headaches. if you do decide to go itb's, being in the uk you should look into http://www.jenvey.co.uk you can tune stack and runner lengths with these to get the powerband you want.

 

The block is sleeved so shouldnt have problems there!

I always thought putting ITBs on would gurantee quite bit more power in midrange.. and genrally threw the power curve..guess thats not entirly true..

I am in conatct with quite few people who can tune the car and are confident they can tune the ITBS.

What im not sure about now is , is it worth spending the money on ITBs ($1600)

will it be worth it..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mikkey1 &raquo;</TD></TR><TR><TD CLASS="quote">The block is sleeved so shouldnt have problems there!

I always thought putting ITBs on would gurantee quite bit more power in midrange.. and genrally threw the power curve..guess thats not entirly true..

I am in conatct with quite few people who can tune the car and are confident they can tune the ITBS.

What im not sure about now is , is it worth spending the money on ITBs ($1600)

will it be worth it..</TD></TR></TABLE>

i got your midrange right here s0n



that's through a JG Victor X manifold with a port matched 70mm throttle body

 

I have yet to see TWM ITB's outperform a JG VictorX past ~7500rpm's.

I tested a set of TWM 50mm's on my 12:1 2.0L and gained 1whp peak and 3-4 in the midrange over a stock Type-R TB/IM

 

Itb's create a very flat torque curve,midrange and throttle response will increase as well. As long as you have a tuner that understands how they work and can manipulate your map to work with them you'll be fine. I've had my car tuned mulitple times and it wasnt until I took it to church's that it was done right. If I didnt tell you I had Itb's you wouldnt know unless I showed you. They dont stick, backfire, or hiccup. I can daily drive them without any problems. There are other ways to accomplish the same goal, but Itb's arent a bad way to go.