We just finished fabbing up set of 2003 GSXR ITB's for our '95 Integra DB8. Thought I would post some photos:

Setup is:

LS/VTEC
GSR Head
ITR Pistons
Toda C's
Toda Valvetrain & Cam Gears
Hytech Header
2.5" Exhaust / No Cat
Lucas 440's
Hondata S100
Stock LS Tranny

We also are using a custom made aluminum vacuum box that connects to the Brake Booster, runs the IACV (custom bracket), IAT, Map, and FPR. We have 2 vacuum lines running from each TB, that tee into a larger diameter vaccum line, that connect to the vacuum box. The car idles right at 1200 rpm, real rich though ... on one of our race car maps. We are using the Honda Map sensor & Honda TPS. We were able to get the TPS to read real close, so it looks like it's going to work fine Tuning the car soon



The brass plugs were temporary. We welded caps over the stock injector holes.



Note the return spring on the throttle cable bracket. We added 2 more on the other TB's to make sure they were returning to full close.



Using the Stock Fuel Rail, GSXR Injector holes, had to extend the TPS wires.

 

Sweet is this the car that going on the dyno at synapse tomorrow?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Runnerdown &raquo;</TD></TR><TR><TD CLASS="quote">Sweet is this the car that going on the dyno at synapse tomorrow? </TD></TR></TABLE>

Yes

 

cool, i'll be there doing some engine assembly. Look forward to meeting you guys and seeing the car

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Runnerdown &raquo;</TD></TR><TR><TD CLASS="quote">cool, i'll be there doing some engine assembly. Look forward to meeting you guys and seeing the car </TD></TR></TABLE>

Cool! Yeah will be there in the morning with this car, and our Turbo Hatch

 

i like it im lookin to do the ITB on my crvtec for my 94 teg

 

post some dynos

 

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

 

Looks great except the nuts for your spark-plug cover are incorrect (both acorn and lower nuts). I'm a little OCD and it's causing the cover to bow.

Like This &gt;&gt;&gt; \_____/

http://www.curpiermotorsport.com/itbs/2.jpg

 

I'm just curious did you dyno the car with the DIY ITBS yet? I would like to know because I am considering building one myself. Also, I know you said your car idle at 1200 rpm. That is kind of rich, did you bring it down a little or no?

 

Can you show a pic of the vacuum box you made? Im really curious. thx

 

what r some dyno specks on itbs

 

cant wait to see the numbers

 

be careful with those booties. I sucked one in before.

 

Dear God I want to do a set of these.

I want to see dyno numbers.

Also, pics of the vacuum log please.

- Derek

BTW, what size GSXR ITB's are these?

 

if they are 1000cc's the throttle size is 42mm

 

Hey i saw your DIY ITB's. I have a few questions. How did you Run IACV, IAT, and MAP sensors?

 

hell how did you run your IACV?
i just bought the same exact set of ITB's that "whatshisname" did in hondatuning for a d series engine. i dont remember anything about an IACV anywhere.


Modified by graveltravel2 at 2:19 AM 11/10/2006

 

 

ok... now that im thinking about it.....
on top of his DIY vaccum log, theres a little box stapped on there with zip ties. theres 4 little rubber lines. 1 running to each throttle body. could this be the IACV?

 

Okay ... we went to the dyno last week, but were unable to get any tuning done beacause of time contraints and because we were not drawing enough vacuum to get a good map reading.

We revised the vacuum setup. Pics later We tapped (4) 3/8" ports further down in the runners, pretty close to the stock injector holes. We ran larger vaccum hose to (4) 3/8" ports on the vacuum box. The IAT is tapped directly into the vaccum box. The map, fpr, and booster also come off the box. We hooked up the IACV, but we are not running it. We now see around ~14-12 in/hg at idle (depending on where we set the rpm), which should be enough to get us tuned. We had to change to new plugs, as they were completly fouled from running the car so rich (map was seeing only 2 in/hg at idle before and was dumping tons of fuel) We tapped in a boost gauge to get the reading.

I'll post the dyno when we go back, and some more pics.

 

to anyone else considering DIY ITB's, the closer you put your vaccuum taps to the trumpets, the more atmosphere you are reading. the closer to the head flange, the more vaccuum. a pressure gradient exists in the runners.

the stock injector slots are a good place to tap for vaccuum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike_belben@yahoo.com &raquo;</TD></TR><TR><TD CLASS="quote">to anyone else considering DIY ITB's, the closer you put your vaccuum taps to the trumpets, the more atmosphere you are reading. the closer to the head flange, the more vaccuum. a pressure gradient exists in the runners.

the stock injector slots are a good place to tap for vaccuum. </TD></TR></TABLE>

Great point!

 

do i need a IACV???

 

its not needed but you might throw a code if its unplugged.