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)

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[kevin311]

Just a quick update for those interested.
I finished installing a set of stainless fuel lines, patched some rust in the hell hole, soldered all of my sensors in, mounted the engine breather box and installed the engine.
I had to make a spot for the IAT sensor on top of the air cleaner, you can see a couple of scratches on the metal on the air cleaner where the bit slipped but I'm hoping to powdercoat them black anyway.
I still have to adapt the throttle cable, finish wiring the starter, readjust my shifter, clean up my wiring and get another cheap laptop for tuning (laptops don't like being trod upon...) and i should be ready to fire it up.

Sorry I only had my phone with me again. I will get some better pics and hopefully some video of it running soon.

Let me know what you think of if you have any thoughts.

Thanks
Kevin (IMG:style_emoticons/default/beerchug.gif)

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