XJ700 *EFI* The holy sh*t it is fast now mod!

Re: 85 XJ700 Fuel Injection Build

oh wow 1000, lol never mind so much, haha, i was thinking maybe parts would be 5-600..

 

Re: 85 XJ700 Fuel Injection Build

I don't think he did it for the cost factor. I think he did it to prove he could and to be different. I am curious what kind of gas mileage it gets

 

Re: 85 XJ700 Fuel Injection Build

I just hate carbs.

 

Re: 85 XJ700 Fuel Injection Build

Looking forward to the complete write-up. I thought you were going to use a 2000 Hayabusa fuel pump; is the Honda unit the same item or just happened to be more convenient? Any idea on why the MicroSquirt failure (or if any changes need to be made)?

 

Re: 85 XJ700 Fuel Injection Build

when you think about the price.. cr carbs cost about 800, so 200 more more fuel injection is nice

 

Re: 85 XJ700 Fuel Injection Build

The reason for the rencon pump is it outputs 43psi and has a built in surge tank and only costs 145 bucks new! Hayabusa pump seems to go for 200 bucks used and is over 500 bucks new.

I got the new Microsquirt today and it works great! Now I just need to install the wideband and finish the wiring.


Oh and this may be in the future! http://cgi.ebay.com/ebaymotors/ws/eBayI ... 103wt_1165

 

Re: 85 XJ700 Fuel Injection Build

Any pics or links on the rencon pump? Currently I will probably use a Nippondenso passenger car pump, cheap and common. But as my ideas have changed as the project evolves its good to see new potential solutions.

For the record, I am also doing an XJ750 with Microsquirt (module), but not on my current motor, on my one currently getting rebuilt. (have everything except pistons).

So what did you do to the poor Microsquirt unit?

 

Re: 85 XJ700 Fuel Injection Build





Injector drivers failed on the microsquirt.

 

Re: 85 XJ700 Fuel Injection Build

Installed the LC-1 today. The wideband sensor is installed in the right exhaust port.

I finished up the wiring and installed the two relays along with using alum foil around the high current wires (spark/fuel grounds). This shields any high current EMI from the lower current wires.

Well here is a bit longer video.





Intake I made. There are two separate intakes, makes the manifold pressure a lot more stable and easier to tune.





36-1 Trigger wheel in action.

 

Re: 85 XJ700 Fuel Injection Build

Rebuilt the front brake calipers tonight. Took a days worth of WD-40 soaking the brake calipers, a heat gun, and a slide hammer I made to pull the pistons out. Cleaned the calipers up and installed them back on the bike. Man takes forever to bleed the damn things. Going to finish bleeding them tomorrow.


Guess this build is just awesome for comments now. I bet no one else on here has a XJ running fuel injection and has a video.

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

Looking good. Not a fan of the filter set up though. Are you going to put any sort of rain deflection on the filters, or just avoid riding in poor weather? Water logged air filters can be severely restrictive.

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

A k&n filter water logged will flow more then a stock filter shouldn't be a problem. Ad least they are pointing down which will keep it out of the engine

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

Cant wait to hear how much better the fuel consumption is on a country cruise.

Is their much other work left to get it on the road?

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

Very little work left to get it on the road. The filters were put at that exact angle so that my legs will block most of the water getting to the filters.

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more

Dude, This is sick. Probally one the of coolest mods I have seen to date. Execlent work.

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

Apart from the nice EFI-job you did, I must say I like the air-intake. It's similar to what I want to do with mine for next year, only I want the two intake pipes on the sides to curve forward over the engine.

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

Some more pictures. Now I am just doing some polishing of the engine etc.

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

I feel like I am being negative commenting on what will obviously be a great finished product, but I have done a lot of EFI work and have to comment on the trigger wheel.

The Microsquirt uses the zero crossing point of the A/C signal as its trigger.
By making the high points of the wheel so long, the zero point is very slow and flat (can draw it) The problem that this may cause is inaccurate timing at different rpm. Traditionally the high point of the sensor should be the same width as the metal core of the pick up (in this case only a mm or 2).

An easy way to test to see if this will be a problem is to program a flat advance curve, and then confirm the timing stays dead steady when you go through the rev range.

 

Re: XJ700 Super Awesome Fuel Injection Build - Now with more EFI

I am using a 36-1 trigger wheel now.

http://cgi.ebay.com/ebaymotors/36-1-VR- ... 500wt_1182

I already figured that issue out. Already had a timing light on it and works fine and having a built in trigger logger in tunerstudio does wonders also. The engine will hit 10krpm within 1 second of opening the throttle. This is prolly one of the best mods that can be done to these bikes.

 

Re: XJ700 w/ Fuel Injection - Videos Inside - Finished?

VERY nice work!!!!
It sounds great. I can't wait to hear how it rides. Can you bring it over so I can take it for a spin? I'll buy the gas for your trip as long as I can tap your brain for information.

Truely impressive