Announcement

**MrDude_1** · 05-09-2007, 10:52 AM

Re: Fuel injected Hawk?

Originally Posted by Texhawk2

Has anyone tried to fuel inject there hawk? I have been kicking around the idea of doing a Megasquirt conversion on my bike. I think it is because of the novelty of tuning with a laptop and I have never really cared for carburetors. Has anyone ever looked into this or done something similar. I did a bunch of research on Megasquirt a few years back for a car project that I no longer own.

Here is a link if someone is not familiar with Megasquirt:

http://www.bgsoflex.com/megasquirt.html

ive built 3 megassquirts, and ive put them on a few cars... but ive never done it to a hawk.

closest thing ive done is helped tune a 'squirted triumph spitfire that had hayabusa (or some other suzuki) throttlebodies on it...

if you have the throttlebodies and the hardware parts setup, you can 'squirt just about anything.

**Texhawk2** · 05-09-2007, 11:28 AM

Have you played with the megasquirt II or just the original? Would you suggest a duel throttle body setup off a Buell or SV or a single (car) throttle body with a plenum? Did you build the kit yourself or buy it built? I don't know if my soldering skills are up to par to solder a board or not. I have messed around with other programmable systems when I had a my Mustang 5.0 GT so I think I could get the base line program setup.

**MrDude_1** · 05-09-2007, 11:57 AM

Originally Posted by Texhawk2

Have you played with the megasquirt II or just the original? Would you suggest a duel throttle body setup off a Buell or SV or a single (car) throttle body with a plenum? Did you build the kit yourself or buy it built? I don't know if my soldering skills are up to par to solder a board or not. I have messed around with other programmable systems when I had a my Mustang 5.0 GT so I think I could get the base line program setup.

i would NOT run a plenum on a small engine like this.. id run a individual thorttlebodies with velocity stacks if i could fit it... you would lose alot of the throttles crispness, amoung other things if you had a combined plenum.

i always bought the unassembled kit... it was the megasquirt V2... i havent even seen a V3 board in real life yet... also, i stopped keeping track of that mini-squirt project... if that ever came together, it might fit/work better for you.

if you can solder stuff onto a board, you can build the kit.. i didnt find it any more difficult then building any other hobby kit... it just took longer because you build the power supply, test it.. then build the timer and serial section and test it.. build the tach input, test it... ect... when you take it one step at a time, its not too hard.

ive never held any fuel injected Vtwin throttlebodies in my hands, so theres not one i can reccomend to you.. i guess you need to find one that works.. i would be looking at factory bikes too.. an SV does sound like a good start.

also, remember you'll need a diffrent fuel setup. high pressure pump... regulator.. return... ect... and all this has to fit in a hawk.
its entirely possible, but its going to be a tight squeeze that takes some planning... i would probly put the MS box where the toolkit goes in the tail.

lol, i just thought of this.. how are you going to tune it? i always did it with the laptop sitting in the car.. uhhh... somehow i dont see that happening. lol.

**brewsy** · 05-09-2007, 01:26 PM

Hey guys,
I've never seen any MS injected vehicles or boards but this is exactly the route I was hoping to take with my next motor.
Current is stock and has a fucked gearbox shaft, the plan (or is it pipe dream) was to make it a 700cc, MS mini, German blokes cool airbox

Object not found!

http://www.hawkster.de/modules.php?name=Forums&file=viewtopic&t=806&sid=4723fe5e58be520636dd6d932521fb18

and use FI SV650 throttle bodies (which I have already purchased).
Would junk the secondary butterfly as I doubt MS can control it and I'm pretty certain that I couldn't program it either. Good thing is that the bodies will be pretty much sized exactly as needed for a smallish vtwin.

Did some research and a 'Busa guy from this list gave me the right model external fuel pump to buy.
I wanted to keep an air box/plenum so that the MS could use overall vacuum signal (MAP?) to get a nice fuel map. If you don't use MAP you end up with a 2D fuel map right?

Heres a link to the mini..

http://www.mini-ms.com/

**MrDude_1** · 05-09-2007, 01:50 PM

Originally Posted by brewsy

Hey guys,
I've never seen any MS injected vehicles or boards but this is exactly the route I was hoping to take with my next motor.
Current is stock and has a fucked gearbox shaft, the plan (or is it pipe dream) was to make it a 700cc, MS mini, German blokes cool airbox

Object not found!

http://www.hawkster.de/modules.php?name=Forums&file=viewtopic&t=806&sid=4723fe5e58be520636dd6d932521fb18

and use FI SV650 throttle bodies (which I have already purchased).
Would junk the secondary butterfly as I doubt MS can control it and I'm pretty certain that I couldn't program it either. Good thing is that the bodies will be pretty much sized exactly as needed for a smallish vtwin.

Did some research and a 'Busa guy from this list gave me the right model external fuel pump to buy.
I wanted to keep an air box/plenum so that the MS could use overall vacuum signal (MAP?) to get a nice fuel map. If you don't use MAP you end up with a 2D fuel map right?

Heres a link to the mini..
http://www.mini-ms.com/homeframeright.htm

you still need a MAP signal to run speed density.

otherwise, its just alpha-N... just RPM vs throttle position..

the map sensor has to be behind the throttleblades. it cant be in the airbox.
you have two options.. either only connect a MAP to one, or connect a small tube between the two throttlebodes, behind the blades, and connect the MAP to that.

on multiple throttlebody setups on V8 motors, i have seen it done both ways.. both seem to work fine...

Announcement

Fuel injected Hawk?

Fuel injected Hawk?

Comment

Comment

Comment

Comment

Comment