DIY ITB's CBR1000RR in a dc2r

[tofu R]

Disclaimer: The following is provided as a GUIDE ONLY, and neither myself nor Ozhonda take any responsibility for the outcomes of someone else doing the following. You follow these steps at your own risk!





I initially got the idea of home made itbs from this website
DIY ITBs (http://www.homemadeturbo.com/tech_projects/itb/)

and I had been throwing up the idea of itbs for a long time ..
as spending over 1k on a mugen intake .. really didnt do it for me ..

Now a major disclaimer.. don't take any of the stuff im saying here as gospel,
cos i am a DIY retard, and the major point of the project was ..
budget.. as well as the sound of these things at VTEC =p ..

Anyone to start first issue of the day .. was what ITBs to use?
after a lot of research i came up with the following..
highlighted are the pro's and cons of what i found..

http://members.optusnet.com.au/ejcheung/itb/bikeitbs.JPG

Now i ended up choosing the CBR1000RR
http://members.optusnet.com.au/ejcheung/itb/mini-PICT0176.JPG
main reasons for this ..

- Honda Technology (can't go wrong with the Honda is god mentality)
- nice spacing already ..
- Honda TPS that is similar to the B series tps
- 44mm Butterfly..

[tofu R]

Which brings me to my next point ..
Butterfly size..
there were larger alternatives .. as u can see the Hayabusa ITBs came in at largest with 46mm butterfly size..
but once again .. with a bit of research and expanding on information i got from www.jenvey.co.uk (http://www.jenvey.co.uk) ..
i came up with the following data..

http://members.optusnet.com.au/ejcheung/itb/butterfly.JPG

Now i am only aiming for 140kw atw.. (stock bottom end..)
so i thought it would be sufficient with a 44mm butterfly..

The main ingredients that i used in this concoction were

- JDM itr intake manifold
- CBR1000RR throttle bodies
- Unifilter Box Filter
- www.velocityofsound.com (http://www.velocityofsound.com) velocity stacks/trumpets..

I'll start off with the JDM ITR intake manifold..

I got this for a STEAL .. as some guy had plumbed some extra injectors into the back of a jdm itr manifold..
I had actually firstly intended the itbs to look sometihng like this
http://members.optusnet.com.au/ejcheung/itb/comparison.jpg

but i wanted to retain as much of the manifold as i could
ie injector bungs .. and even the injector mounting points..
so what we ended up with ..
was a chopped intake manifold ..
that had to be welded and a plate fitted and rebored and honed ..
and it ended up looking like this..

http://members.optusnet.com.au/ejcheung/itb/mini-PICT0170.JPG

http://members.optusnet.com.au/ejcheung/itb/mini-PICT0171.JPG

http://members.optusnet.com.au/ejcheung/itb/mini-PICT0172.JPG

which i must say i was very happy with ..

I then reused the adaptors that originally came with the cbr1000rr itbs
looks like this

http://members.optusnet.com.au/ejcheung/itb/mini-PICT0175.JPG

The filter that i picked up was not a bad price either.
$150 for a pre-oiled and fully caged and boxed filter..

i opted totally against the regualar use of itb socks.. as they really disturb the flow of the velocity stacks..

I then reused the adaptors that originally came with the cbr1000rr itbs
looks like this

http://members.optusnet.com.au/ejcheung/itb/mini-PICT0177.JPG
http://members.optusnet.com.au/ejcheung/itb/mini-PICT0178.JPG
http://members.optusnet.com.au/ejcheung/itb/mini-PICT0179.JPG

and the current state of them ..
This is by no means finished.. im still working on finishing up the port matching of the black bits to the IM flange
and also port matching the IM itself..
as well as well as roughing up the insides to a nice even grit ..
as well as the whole vacuum log business..
and ill be sure to put up a vid once this is all done ..
Hope you enjoyed =)

http://members.optusnet.com.au/ejcheung/itb/mini-PICT0189.JPG

and a mandatory show off pic of the car its going into =p

http://members.optusnet.com.au/ejcheung/itb/a.JPG




Disclaimer: The following is provided as a GUIDE ONLY, and neither myself nor Ozhonda take any responsibility for the outcomes of someone else doing the following. You follow these steps at your own risk!

[.::F[L]Y::.]

damn..thats awesome man!

how much is it costing you for this project?

also i like what you did with the front bumper

[CUL8R]

looking good bro!
what do a set of huyabusa itbs cost these days???says the man that never knew to begin with. lol

i know u didnt use huyabusa, but i assume u checked it out

[tofu R]

a set of busa ITBs go for around 400 bucks with no tps or injectors..

but i didnt get them cos they were too exxy ..

[ian]

hmmmmm.............interesting.....very interesting.

i'd like to hear that scream at 12500rpms?.....hahaha

[ginganggooly]

Nice work mate. I can't wait to see the results. That plus your killer head combo should make some very interesting times.

[Icegroove]

Nice! :)

Props to you...

I am also wondering the cost of your setup?

[Limbo]

looking very good would like to see wat it does on the dyno

[hero]

if you dont mind me asking.. how much have u spent and how much of the work did you actually do?

looks very very expensive for a diy

[ProECU]

Nice work Eric, extremely impressive.

[fatboyz39]

Looks good mate. I personally wouldn't build my own quads. I would just buy ones off shelf plug and play.

HAve you figured out you gonna run ur vaccums? MAF sensor? TPS?

[egSi]

props for the diy man, hope it works out for you.

[solitz]

great work champ

[JDMCVC]

do the CBR954RR ITB's have the oem honda tps ?

[tofu R]

Thanks guys..
cost wise .. it costed me definitely under 1/2 the price of off the shelf kits..
it is an expensive DIY ..
but generally off the shelf costs 2.5k
+ i wasnt happy with how some of the setups were..

all the maps and the sensors should be fine as they are all oem..

Yes cbr954 has a comaptible tps =)

[tofu R]

also you have to consider the costs u can get back
because now i have a dc2r tb, intake, intake maniold ..
all for sale that will easily net me up to $500 bucks all together..
so all in all its quite a lot cheaper than me getting a new tb ... and screwing around ..

[ECU-MAN]

moved and add disclaimer


awosme work dude. love your work

have some rep points for this one

[EKVTIR-T]

Really good to see some genuine ingeniuty.Hope it turns out well for ya :thumbsup:

[Chris_F]

nice work, can't wait to see the end result

[Edgeauto]

They look awesome, great wirte-up. We have done a similar thing with the Toyota ITBs with great results. Hope they work well for you.
Here is a pic of ourshttp://www.edgeautomotive.com.au/images/ITBsmall_0.JPGhttp://www.edgeautomotive.com.au/images/ITB0048small.JPG

[BlitZ]

Good one Eric..

Cant wait to see the results

[dynosaur]

Magnificient and Marvellous job....... u r the man... :)

[dynosaur]

also you have to consider the costs u can get back
because now i have a dc2r tb, intake, intake maniold ..
all for sale that will easily net me up to $500 bucks all together..
so all in all its quite a lot cheaper than me getting a new tb ... and screwing around ..

Hey tofu R ,

so far , we still can reuse our OEM sensor ?

l just wondering , after we finish all the job.... do we need to retune the ECU or not ?

thanks.... :)

[ekslut]

Nice write-up :thumbsup: I am currently doing this too but with suzuki throttle bodies, but if honda's are going to be easier with the TPS I might swap to some honda ones (the TPS is the only thing that has me worried about the suzuki ones).

So the TPS for the cbr 1000rr is fine to use with the B-series engine?

Also what length did you decide to make the ITB's and how did you get this length?

[tofu R]

Nice write-up :thumbsup: I am currently doing this too but with suzuki throttle bodies, but if honda's are going to be easier with the TPS I might swap to some honda ones (the TPS is the only thing that has me worried about the suzuki ones).

So the TPS for the cbr 1000rr is fine to use with the B-series engine?

Also what length did you decide to make the ITB's and how did you get this length?

the tps plug is slightly different
but nothing a bit of splicing and soldering wont do

but the voltage is the same..
i am yet to do it ill let u know how i go..

the length.. i did a calculation using helmholtz theory..

based on cam duration/ power range/ diameter and of course length..
came to about 33cm .. from the valve ..

[Duesta]

wow eric! you gotta let me hear how that sounds after you get it done :)

[kraiye]

thats awesome dude :thumbsup:
cant wait to hear it in tha vid :)

[panda[cRx]]

itb's seem to be the flavour of the month atm

nice stuff, will be interesting to see the end result

[ZeForce]

Do all the honda CBR ITB's use the same TPS?

[Jomsy]

be sure to post up some before and after dyno runs, nice work

[ProECU]

Do all the honda CBR ITB's use the same TPS?

Thats not an issue for you. Your tuning software can calibrate to any voltage range.

[sebatron]

i rikey. ITB's are great.
i would go bigger than 44mm though - i'd rather have room to grow with power output.
bit of a safety factor i guess.
it's like how people get 450hp rated turbo's even though they're only going for 200kW at the wheels.
the horsepower figures in that table are ideal figures, which you'll never reach, unless you can control intake temperatures, fuel quality, etc etc.

i'd go at least 47mm.
so probably cbr1000rr, but bored out? not sure if there's enough room to bore out an extra 3mm tho.

[ZeForce]

Thats not an issue for you. Your tuning software can calibrate to any voltage range.

:angel: :angel: :angel:

[Muzz]

Sorry to bring this back from the dead, im keen to know how it all worked out.
have you had a chance to finish the project and install/tune them?

How are you running the vacuum system? im guessing youve got 4 tubes coming from between each throttle body and cylinder, and they all lead to a common chamber, then the brake booster line is connected to the chamber, along with all the things requiring a vacuum source.

Where have you got the map sensor reading from??

[Edgeauto]

You have to take the map reading from the vacuum chamber cause you want a stable reading as possible.

[De_Cruelz]

tofu r sold the ITB setup before he finished it :)

[qikteg]

were there any calculations made for the runner lengths?