well i decided too go itb's. they are 929 cbr 40mm throttles. the first impression is pretty goodm so far. i am just using a vafc and a fpr to tune it with. i am getting it on a wideband o2 this week. comments are appreciated. thanks.

 

Welcome to the world of DIY ITB's. Hope it works out well for you.

 

actually the amazing thing is the best part about them is the daily drivabilty has stayed the same. i mean they don't feel any different just driving around town. i was actually suprised

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Booyakasha &raquo;</TD></TR><TR><TD CLASS="quote">actually the amazing thing is the best part about them is the daily drivabilty has stayed the same. i mean they don't feel any different just driving around town. i was actually suprised</TD></TR></TABLE>

so how is it the rest of the time?

 

you mean like full throttle ****? it pulls pretty good all the way to nine. i just need to tune it. the brakes work great. i have two nipples on each runner, one goes to map and the other goes to the vacuum box for the brakes. the car starts up first try every morning and idles at a grand all day long.

 

Here's a few more pics for ya.

 

thanks jesse. hope to see ya at cmi tomorrow.

 

40mm!! ouch!

 

what are you using for IAC?

 

just left it plugged in but with coolant lines disconnected and bypassed. I've done this on several cars with no problems so far.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RenoRacing &raquo;</TD></TR><TR><TD CLASS="quote">just left it plugged in but with coolant lines disconnected and bypassed. I've done this on several cars with no problems so far. </TD></TR></TABLE>

no problems yet. in the morning it takes a little longer to warm up, but nothin major. it just idles at 1000 all the time instead of increasing the idle speed when it's cold. i just give a little gas in the morning to speed things up.

 

I have some 954 CBR's, and theres this setup right above the idle screw that I think is some sort of IAC. Could I just hook up some vaccum to that?

 

There are an inlet and outlet on the stock idle adjuster screw for the motorcycle. they are intended for coolant not vaccum. I'd assume you could use it without any problems but I've never felt a real need to. I like a nice steady idle all the time and the cooler the car the better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RenoRacing &raquo;</TD></TR><TR><TD CLASS="quote">There are an inlet and outlet on the stock idle adjuster screw for the motorcycle. they are intended for coolant not vaccum. I'd assume you could use it without any problems but I've never felt a real need to. I like a nice steady idle all the time and the cooler the car the better. </TD></TR></TABLE>

Ok, so thats coolant for sure? Ill try runing it like that. Im trying to maintain a very stock dependable feel to it. Someone else told me its vacuum. weird.

 

trust me dude. if i gave you a drive in my car, you wouldn't even know i had the throttle bodies minus the valve/cylinder noise that you hear. seriously.

 

Tite **** eric hope they keep on working well

 

Nice job

 

you think you made a power gain with this?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FormulaGSR &raquo;</TD></TR><TR><TD CLASS="quote">you think you made a power gain with this?</TD></TR></TABLE>


they are 40mm...... i would doubt very much

 

did you customize the ITR strut bar? that looks whicked.

 

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


they are 40mm...... i would doubt very much</TD></TR></TABLE>

I bet he picked up some nice mid-range torque though.

 

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


they are 40mm...... i would doubt very much</TD></TR></TABLE>

yeah, but that is forty mm per intake port instead of just one 70mm throttle body. i think the sruface area came out to be 85-90mm for the throttle bodies. and, yes, i did notice some gains, especially at higher revs.

edit: okay i did the formula for surface area of a circle (3.14xRadius(2)) and i came up with the 3,846 for the spoon 70mm throttle body and 5,024 for the itbs. that would yield an increase in surface area of roughly 23% or so. i believe that is correct. so if we did 70mmx.23 would yield and increase of 16.10. so that would be a 86.1 size single throttle body. quite aan increase for sure. aren't the toda ones only like 42mm anyway? the 42mm would only yield a 9% total increase in size over the 40mm.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TERRANCe &raquo;</TD></TR><TR><TD CLASS="quote">did you customize the ITR strut bar? that looks whicked.</TD></TR></TABLE>

yeah renoracing and i were making them for a short while over summer. pretty cool huh?


Modified by Booyakasha at 6:28 PM 10/6/2004

 

Schweet!

I can't wait to get my F4I setup done.

 

where did u get the strut bar from?

 

i want to buy a DIY ITB