I have searched and searched and couldnt find anything on hp numbers with diy itb setups. I am very curious because i have a set and i would like to know if anyone has seen some real numbers. If you have them please post your whp gains and a quick rundown of your setup. Really interested to see what people have done!

 

yea me 2

 

You might find a Unicorn first.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nick M &raquo;</TD></TR><TR><TD CLASS="quote">You might find a Unicorn first.</TD></TR></TABLE>

I got one FS in the h-t market place.

 

It better be JDM with a CF horn

 

haha alright but seriously has anyone dyno'd these things or am i going to be the first...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllM0tadc2 &raquo;</TD></TR><TR><TD CLASS="quote">haha alright but seriously has anyone dyno'd these things or am i going to be the first...</TD></TR></TABLE>

im interested in them too, i just picked up a set of CBR 954 itbs and was planning on putting them on my LS-vtec build just for the hell of it and see what happens

 

how big r they?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Used2beAb16 &raquo;</TD></TR><TR><TD CLASS="quote">how big r they?
</TD></TR></TABLE>

they are from a 954 cbr, i believe they are about 42mm

 

Most of the diy itb are off of sometime of motorcycle. Most of the time they arent big enough and it hurts more then it helps. Most of the time.

 

ttt for some answers!

 

Home made Turbo put some on a B16 and they made around 170 whp, the block was honed a little, they have a post on here about it, it was called the trailer park b16 or something, if i find the link i will post it

they also give you all the steps for building them

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nick M &raquo;</TD></TR><TR><TD CLASS="quote">You might find a Unicorn first.</TD></TR></TABLE>

so sad, yet so true

 

I tuned a ITR with ITBs. The graph is on my website in the dynos section.

http://www.j-k-tuning.com

PS, the dyno reads about 10 Hp lower than the one across the street ( just for the record)

 

what size tb was used?

thank you
m.

 

I think they were CBR ITBs on his setup. If you look up user name rice4life his setup is posted in great detail on here. Just search the archives.

 

I have a dyno pic laying around..Ill try to dig it up... Mid range is HUGE. Top end is very plentiful

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dibble &raquo;</TD></TR><TR><TD CLASS="quote">Most of the diy itb are off of sometime of motorcycle. Most of the time they aren't big enough and it hurts more then it helps. Most of the time.</TD></TR></TABLE>

That's a very uneducated guess.

Its not just about how much air you can move...its about the speed of the air coming in...Not to mention that a byproduct of the faster air pulse brings more air in withit, ITBs also create... Fawk this. I've explained this too many times. Go do some research before you make a post.

Most aftermarket ITB kits in Europe and Japan use 42mm itbs and some use 45 and others 48...ITBs.. and with CBR itbs as well as Suzuki units having a taper, it acts as a Venturi. Which you might have to search to find out what that is, too.

CBR 954RR is 46mm tapers to 42mm. I've built a couple of sets using this method: https://honda-tech.com/zerothread?id=1008048

 

PS: I build ITBS...if you need some, let me know.

 

Here's the setup on my car that rice4life made...here the link https://honda-tech.com/zerothread?id=947796 and you can find the dyno graphs at http://www.j-k-tuning.com/

 

here is my setup by the way





oh and by the way, Circuit Star-29 can you tell me if i have the suzuki 750's or 1000's thanks. i think they are 750's but not sure

 

there is no difference between the 750s and 1000s. they are the same itbs.

 

oh ok thanks for clarifying