New to this site and just wanted to share my F22B2 ITB setup. I have not installed the ITB's yet. I am currently tuning my chipped P75 with a P30 F22B2 Base ROM on the stock motor first to get the kinks out.ECU Chipped
I started this whole project off with learning how to chip my own ECU and it was a bit tougher than I thought but I got it done eventually.
My P75 non VTEC Ecu converted to a P72 VTEC w/IAB enabled, lowprof Zif Chipped, Jumpered, to allow for an easy return to the stock P75 mode. Base Mapped, set up for Hulog datalogging and OBD2 (Veh) to OBD1 (ecu) wired.
GSXR Throttle Body prep for F22 ITB conversion
These are a set of 2003 GSXR 1000 Throttle bodies. Measuring 51mm at the trumpet and 46mm @ the throttle plate. Now some may say that these are the measurments for a Hyabusa, so be it, I got these TB for the price of 1000’s….cheap $80 delivered.
First sep was obviously to clean them up and get rid of all the bits that I will not be using.
They came with the secondary throttle bar still attached but not the the valves. I removed the bar and was faced with the fact that a hole in the side of the ventury would not be a benefit so I filled the holes with JB weld.
Before JB weld
& holes filled
Then I had to go about deciding what to do with the stock GSXR fuel injector locations. They could be a possible use in the future so for now I decided to tap them out and make them optional vacuum ports.
Injector bungs Pre tap
Tapping them out
Fitted with a 1/4 brass vacuum fitting that I can plug if I don't want to use them
Internal view of vacuum port
I did not make the injector bungs any bigger or modify the seal in any way so that I may be able to add an extra set of injectors in the future. May even try adding the GSXR injectors and using an old mega squirt to control them.
Well after doing this I saw that there was a bit of room to clean up the JB weld and maybe enlarge the ventury.
So I honed them out about 1mm making them 52mm at the trumpet and 47mm at the throat
Then polished them.
on to
The runners and stock F22 manifold.
This is where I started with a stock Upper & Lower IM.
After disasembly here is what I had to work with, gotta love So Cal car parts not a spot of rust or aluminum pitting.
After a few hours of cutting, grinding and fine tuning. I get my lower manifold ready for runners.
At this point is where I stood stagnant.....waiting........and......
........waiting. It was a long wait for my custom bent aluminum runners. You wouldn't believe how hard it was to find 1"7/8" aluminum tubing in this city....not a common tube size for refineries or paper mills... :lol: Not one shop in the city carried this tube size. Oh well I found some and have made my request for custom 40's. I don't want my ITB's pointing at my firewall, I want them as close to my hood as possible.
Here is where it all begins, the hours of fabrication. These are all the parts that went into making my ITB's, Runners, Fuel Rail and Vacuum Manifold.
And.......
here they are with those unbelievable hours of fabricating and grinding to get the angles right as well as the curve. I had to make it so that there would be as little bend in the inside track of the runner as possible. Some may have noticed that the runners I started with were a lot longer...well that's how long I needed them to achieve the curve without being to badly crushed in the bender. The amount that they did flatten matched the oval shape manifold ports 100%. I now have enough pipe to do 1 or 2 more sets depending on the runner length. I only used one and a half of the four.
Tapped and ready for welding
Fitted with the bottom half of my ram air GSXR air box. All measurements were double and triple checked to ensure this thing will fit snug in the available space.
Vacuum Manifoild & Custom Fuel Rail
Now some people are saying that what do you need a vacuum manifold for ITB's are un-tunable using vacuum. Well not to step on any toes but I need vacuum for more than just my MAP sensor. I need vacuum for my FPR and my break boost. Plus I had some spare tubing laying around and some aluminum end plugs so I did it. Now with my
Vacuum Manifold
My vacuum manifold is complete will all the factory vacuum line ports as you can see in the pic it is actually the factory vacuum housing from my parts manifold.
Fuel Rail
Well with a stock rail that came with my alternate intake manifold just laying around. I decided to play around a bit. I removed the plug from the end of the rail and drilled/chased it out to an inner diameter measuring the same as the over priced after-market fuel rails @ 1/2" and ported the inlet tube to match, not quit 1/2' but as close as I could get within pressure tolerances. There is still more than enough wall thickness to push the fuel pressure up to 80psi. Tested to 80psi and no further.
Here is a finished image of the Fuel rail and vacuum manifold complete in there tight little package. as small as I could make it.
And it fit's in nice and tight under the ram air induction ports.
And this is how it sits now waiting to have my engine rebuilt and my engine bay cleaned up.
I welded my runners directly to my throttle bodies
Complete with vacuum can and all stock vacuum line ports.
Modified by GhostAccord at 3:22 PM 4/19/2007
Modified by GhostAccord at 8:33 AM 4/20/2007
Modified by GhostAccord at 6:11 PM 4/23/2007
Modified by GhostAccord at 4:24 PM 5/25/2007
Projects
96' Accord Ex F22B2 "Ghost"
Another 78' 502 Camaro
"All Motor All the Way"http://www.honda-tech.com/gara...=6303
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