Itbs im using are off a honda cbr 954rr with honda cbr 1000rr velocity stacks. why the 1000rr stacks, because they are much shorter than the 954rr and will clear the firewall of my ej1.



also using the stock intake manifold flange which i used a bandsaw to chop it off and milled it to get a nice flat surface.


im using schedual 40 1 1/2in tubing i got from a local metal shop. each runner was appro. 3" long, but now the outside runners are angled at a 15 degree and the inside are angled at 5 degrees because the h22 flange ports do not match with the ITBs.


now im wondering if i should give the runners a 10-15 degree angle upwards instead of having them just straight?

 

k make me some, bye.

 

very cool, please post some vids when its all finished

 

how do you plan on mating it to the im? Looks like a very nice project man

 

not bad, what engine management you using? ITBs cause power loss unless your engine is tuned to them. In that case, they'll add a good 25 to 35 whp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by diewX3 &raquo;</TD></TR><TR><TD CLASS="quote">how do you plan on mating it to the im? Looks like a very nice project man </TD></TR></TABLE>

im having a good friend of mine weld it together because i dont know how to weld aluminum.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PreIudeSI &raquo;</TD></TR><TR><TD CLASS="quote">not bad, what engine management you using? ITBs cause power loss unless your engine is tuned to them. In that case, they'll add a good 25 to 35 whp. </TD></TR></TABLE>

i plan on using uberdata and borrow a wideband from some local guys who are going to help me out. right now im getting my p28 fix because i did a bad job soldering. so if you need an ecu chipped go to 93turbo16

 

f*cking sweet man...let us know the results.

 

Gotta love self projects like this, Einstein would be proud....good luck. Keep us informed.

 

Looks awesome man I would like to attempt this some day lets see some finished products!!

 

I've yet to see any real documented proof that DIY ITB's actually produce any real major gains.

Some before/after dyno's are impossible to find.

 

nice to see another DIY itb for the h22

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evil Nick M &raquo;</TD></TR><TR><TD CLASS="quote">I've yet to see any real documented proof that DIY ITB's actually produce any real major gains.

Some before/after dyno's are impossible to find.</TD></TR></TABLE>

I agree, for the love of god please do a before and after dyno.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evil Nick M &raquo;</TD></TR><TR><TD CLASS="quote">I've yet to see any real documented proof that DIY ITB's actually produce any real major gains.

Some before/after dyno's are impossible to find.</TD></TR></TABLE>

last month's import tuner did a power pages on an s2000 with itbs tuned with an AEM EMS. If i recall correctly, they got 35whp on the top end and some decent gains through the rest of the powerband. Also what you don't think about is that ITBs allow the motor to rev faster, like a lightened flywheel. They allow you to access the top end power on relatively high revving motors like what honda makes.

 

ITB is an especially nice option for the h22 anyway, nobody really makes a great aftermarket IM for all motor.....all we have is the euro R which has its limits...

to the creator, will you be using a "filtering box", one of the huge boxes that goes over the end to filter the air? oh yeah and what did this all cost?

also, i dont really see a huge difference in company made and DIY ITBs, whats the real difference gonna be?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">ITB is an especially nice option for the h22 anyway, nobody really makes a great aftermarket IM for all motor.....all we have is the euro R which has its limits...

to the creator, will you be using a "filtering box", one of the huge boxes that goes over the end to filter the air? oh yeah and what did this all cost?

also, i dont really see a huge difference in company made and DIY ITBs, whats the real difference gonna be?</TD></TR></TABLE>

i dont know what im gonna do for a filter box but, i was looking towards doing something like this

heres the price list

ITBS $135
1' of aluminum $16
OEM 1000rr stacks $40
2 Rubber couplers cut in half & clamps $20
h22 intake manifold $55
fittings and PVC pipe $20
$286

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PreIudeSI &raquo;</TD></TR><TR><TD CLASS="quote">last month's import tuner did a power pages on an s2000 with itbs tuned with an AEM EMS. If i recall correctly, they got 35whp on the top end and some decent gains through the rest of the powerband. Also what you don't think about is that ITBs allow the motor to rev faster, like a lightened flywheel. They allow you to access the top end power on relatively high revving motors like what honda makes.</TD></TR></TABLE>

I dont care what import tuner did. That doesnt mean anything to me. Were the ITB's made from motorcycle parts? Or were they made specifically for that application.

I have 2 friends who have had TWM and Jenvey ITB setups and I know they make power.

However, before and after proof that DYI ITB make as much power as real ITB's is impossible to find.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">also, i dont really see a huge difference in company made and DIY ITBs, whats the real difference gonna be?</TD></TR></TABLE>

holy crap lol

 

i mean the huge difference youre talking about could only be maybe quality of welds....im guessing here as i never have made these, you tell me, whats the usual drawbacks...

because as of now this is looking like a very affordable way of doing this....you probably can do it for less than 150 bucks if you sell the stock mani and tb.....

oh and about the filter box thats exactly what i meant, its looking good, let us see when its finished....

edit: make a writeup when youre done....do it...

 

I'm working on some DIY ITBs right now too, and im just curious what kind of measurements you are using? Would you mind posting your specs just for reference? Just so we can compare everybody's setup.. like butterfly-to-valve distance and all, diameter...ect

 

ITBs are ITBs. DIY ITBs probably have slightly less potential than specifically designed ones but who cares when you're saving thousands of dollars, that's what DIY is all about. Anyway, lets try not to get off topic and turn this into a ITB debate thread, there are plenty of those. Keep us updated, i'm interested to see dynos.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PreIudeSI &raquo;</TD></TR><TR><TD CLASS="quote">ITBs are ITBs.</TD></TR></TABLE>

lol right

you guys really need to do some more research

 

everyone wants these to work perfect (including me)...but the truth is that every little thing changes the rpm band and effectiveness...everything makes a difference, diameter, length before tb, length after tb...etc

now maybe if u copied a good set exactly then that should be a good start

and a before and after dyno would be really nice

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cyberdx16 &raquo;</TD></TR><TR><TD CLASS="quote">
i plan on using uberdata and borrow a wideband from some local guys who are going to help me out. right now im getting my p28 fix because i did a bad job soldering. so if you need an ecu chipped go to 93turbo16 </TD></TR></TABLE>

Just so U know Crome now has full support for ITB's now.
Here is a direct quote from ITB Tools script bundled with crome..
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">"Tuning a vehicle with ITBs can be very laborious especially when trying to run them using standard MAP/RPM maps. With ITB Tools, you have the ability to tune an engine according to both MAP sensor and TP sensor inputs.

Since the benefits of ITBs are often only realized at high rpms, ITB Tools comes bundled with Rev Tools, another great plugin that lets you extend the VTEC maps to 11,000 rpm. To take advantage of potetntial power gains above the 9000 rpm stock limit, simply chose to install Rev Tools. "
</TD></TR></TABLE>

Here is a screen shot..


This looks to be a very nice feature, and should make tuning ITB, much much easier!!!!


Modified by MindEracer at 10:23 PM 2/10/2005

 

Is is first possible, then second worthwhile to run ITBs on a turbo setup?

 

While there probably ARE differences in power between DIY and company-designed ITB's, I'd be willing to bet that the difference in power made between the two would be very close, if not negligible.

 

^^ agreed, it seems like little things here and there could make small differences, but not enough to make a big power difference.......