ITB project, Honda VFR 800 ITBs Options

[kevin311]

I've been running Megasquirt II for a while now on my 71 1.7 with the stock D-jet components and it has been running well. But everything is looking tired in the engine bay and I am planning on taking out the engine to clean everything up and install SS fuel lines.

Then I remembered seeing a video youtube with an australian guy reviewing his 914 and he mentioned having GSXR ITBs on his car. Sounds like a fun project to me so I started researching and think I have found an even better solution.

The throttle bodies I found are from a 2001 Honda VFR800. The bike is a V4 so the TBs and fuel rails are already split into pairs, and have a linkage that connects both. They have 37mm throats, and came with the throttle position sensor, fuel pressure regulator , injectors and and all the wiring and connectors. Also the brackets on the sides already have a tab for throttle cable.

The injectors are high impedance so I wont have to run PWM on Megasquirt anymore and hopefully can get an even finer tune.
I'm also thinking about switching the PCs for 96mm, but I think that will wait until later, but you never know this started out as an engine cleaning...

The only things I need to figure out are the flow rate of the injectors, where I'm going to hook up the IAT sensor, and will need to build a vacuum plenum. Also these injectors run at 36 psi, can the stock fuel pump handle that or do I need to look for another solution?

Here are some pics, check out how close the spacing is for weber manifolds.
Please excuse the dirt. I still haven't cleaned them up.

This is gonna be fun. (IMG:style_emoticons/default/beerchug.gif)

(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1345224315.1.jpg)

(IMG:http://i694.photobucket.com/albums/vv310/Kevin31188/DSC03555.jpg)

(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1345224325.2.jpg)

(IMG:http://i694.photobucket.com/albums/vv310/Kevin31188/DSC03552.jpg)

(IMG:http://i694.photobucket.com/albums/vv310/Kevin31188/DSC03558.jpg)

(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1345224346.3.jpg)

(IMG:http://i694.photobucket.com/albums/vv310/Kevin31188/DSC03559.jpg)

[kevin311]

Thanks everyone! (IMG:style_emoticons/default/beerchug.gif)
Just a quick update, I modified some air filters to fit the tbs. I'm not sure I like the chrome... I may paint them black.
I also got a crankcase vent from the local VW store and started running some of the vacuum lines.
Next up is making a throttle cable mount and cable.

Sorry about the pic quality all I have at the moment is my phone.
(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1368374247.1.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1368374247.2.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1368374247.3.jpg)

[moparrob]

Thanks everyone! (IMG:style_emoticons/default/beerchug.gif)
Just a quick update, I modified some air filters to fit the tbs. I'm not sure I like the chrome... I may paint them black.
I also got a crankcase vent from the local VW store and started running some of the vacuum lines.
Next up is making a throttle cable mount and cable.

Sorry about the pic quality all I have at the moment is my phone.
(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1368374247.1.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1368374247.2.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i694.photobucket.com-11752-1368374247.3.jpg)

Glass bead them then either rattle can or powder coat in wrinkle black.

The rattle can holds up amazingly well if applied properly.