Tag: Fuel Injection

My fuel injection project continues to progress slowly.  Here are a few pictures of parts that I have received over the last few months and have neglected to post until now.  This is a throttle body set from a CBR600RR.

 

I took off the throttle position sensor, the injectors, and the idle air control valve from the unit.

This is where the TPS will go on the PC800 carbs.

 

This is a CBR600RR fuel tank.  I will be cutting the part out of it that fits the fuel pump I purchased earlier.

 

The idle air control valve off of the CBR600RR throttle bodies.

I also bought a spare PC800 fuel tank (at right) to weld in the part from the CBR600RR tank (at left).

 

And I purchased a PC800 air box so that I can modify it for secondary injectors and to remove some of the air flow restrictions.  The plan is to do something similar for the PC800 exhaust system.  I am considering putting dual straight pipes or possibly dual slip-ons in place of the stock PC800 “angry cricket” exhaust system to de-restrict it.  The hope is that it will provide more power.

 

The next steps are to install the injectors in the spare PC800 carbs and install the fuel pump into the spare PC800 tank.  Then modify the airbox to accept the secondary injectors.  After that, I will need to spend some money on electronics and modify the exhaust system.  This project is getting close to the no-turning-back point.  That’s kind of scary!

It’s been a while since I posted on the project…

Things are coming along slowly. I’ve been quite busy with academic matters. This is my conference paper “busy season.”

A couple days ago I got in a 2008 CBR600RR throttle body set. After messing around with the single Dodge Neon throttle body, I decided I should stick with dual throttle bodies that already have injectors mounted properly. These throttle bodies will take some modification but it doesn’t look like an impossible job. The worst that can happen is I end up with eight good injectors.

Talking with a member of the IPCRC today the idea struck me that the duckbill on the back of the PC800 could make the perfect place to mount all of the electronics. There is plenty of space in that plastic bit. However it’s hard to get to and has no venting so it might get too hot in the summer for sensitive electronics. Have to think about that a little more but it is a possibility.

This project will come to fruition. It just might take a few months.

After I finish designing the intake and injector manifolds, I am going to need to figure out the air routing and filter setup.  The current filter on a PC800 is equivalent to an HA-8089 from K&N.  It has a filter are of roughly 10×6 inches.  Arguably, the air intake on the PC800 is a bit restricted so it could be bumped up larger on my FI conversion project.  A replacement that I have seen on other makes of bikes is to drop in a K&N cone-style filter.  One particularly attractive one that would fit on the end of the throttle body is an R-1260.  It’s inexpensive (about $30 online) and easy to get.  It has a conveniently larger filter area.  However, space constraints will dictate what I can put in.  I will also want to be pulling air from as far forward as possible on the bike.  Otherwise, I’ll be sucking in hot engine air which won’t help power any.  When I am making up the air filter/intake manifold, I will also need to remember to put a couple of bungs on it for my MAP sensor and other such measurements and references.