Fuel Injected XJ750 *UPDATE*

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

Fuel Inject a 900.

Seems like the Drive Shaft can handle a bit of Torque.

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

would be nice but i already have a 750 to fuel inject

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

I wouldn't be surprised to learn that the Latter-day Fuel-Injections that feature Throttle-Bodies which look like the Body's of the Carbs we all know and fight with ... would FIT our Bikes with a minimum of Fabrication and Machining.

I know when I look at the F/I Throttle Bodies on the new Triumph-850, ... it looks like the Bike is Normally Aspirated using CV-Carbs.

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

Just ran across the first and only 8 second Yamaha Turbo, now for sale - -

http://cgi.ebay.com/ebaymotors/YAMAHA-T ... 3cb2f2c94a

Looks like the FJ1200 can handle 250 real horsepower !!
Food for thought !

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

In the last photograph of this bike; it looks like the Shift Lever is hooked-up to a Servo, ...

What would that be for?

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

That's an air shifter - - you mash a button and a relay cuts the ignition while another kicks the shifter.

Just had a thought - if it was wired into the shift light on the tach, it would be an automatic ! You would just hang on !

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

You'd still have to clutch it to get it going or stopped.

Might not even need the shift light. An electronic tach input and a variable resistor should be able to get you shifts at any RPM you like. Use two and it'd down shift for you too.

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

Make your runners as long as you can reasonably. A 7-8 degree taper helps cylinder filling.
The end of the runners in the plenum should wrap around completely for best flow. Think a donut under a velocity stack. The radius of the flare should be the radius of the pipe.
Generally a plenum volume 1.5 times the volume of 1 cylinder works well.
Under boost the runner length is irrelevent however longer runners will improve throttle response below the torque peak.

You can call me @ Summit Racing Tech 330-630-0240 and ask for Tom.
I'm off Wednesdays and weekends.

Performancetrends.com has a program called Engine Analyzer that can help with runner lengths. Last I looked you could download Engine Analyzer Pro for 30 days for free! ( that's a $450.00 program!)

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

Thank you very much for the help!!!!

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

A mustang 302 89-93 stock throttle body is 58mm IIRC.

 

Re: Fuel Injecting a Seca for Senior Design Project - Need H

I've used and are using the "micro-squirt" system which was designed for motorcycles. We currently are using it on a special project where we had to add more electronics and is a bit simpler to utilize. re: http://xjbikes.com/Forums/viewtopic/t=29144.html
Good luck with it!

 

Re: Fuel Injecting a Seca for Senior Design Project - Need Help!

Everything is ordered or is here, and we've started work, pics and a detailed parts list to be posted soon.

 

Any updates?

 

I'm also curious if this project was completed or if anyone else has successfully fuel injected an xj650 turbo.

 

I'm also curious if this project was completed or if anyone else has successfully fuel injected an xj650 turbo.