Help me...MOTEC M4 problem

[yabak]

Hi~~
We are using the Motec, which requires a cam and crank signal to run our F3 engine sequentially. We would like to use a Hall effect sensor on the
cam for more reliability, If any teams that are running a cam sensor would be willing to share what types of sensors/trigger wheels/magnets they used. Does anyone know where I can find GENERAL SETUP DATA of MOTEC for a CBR 600 F3 Engine.

Crank sensor : 12 teeth (with 2 missing teeth)
: magnetic type
TDC sensor : Hall type
injector : sequential operation

Thank you.....

Soungjae Hyun
Yeungnam University of KOREA

yabak1979@msn.com
cmdm-engineer@hanmail.net

[yabak]

Hi~~
We are using the Motec, which requires a cam and crank signal to run our F3 engine sequentially. We would like to use a Hall effect sensor on the
cam for more reliability, If any teams that are running a cam sensor would be willing to share what types of sensors/trigger wheels/magnets they used. Does anyone know where I can find GENERAL SETUP DATA of MOTEC for a CBR 600 F3 Engine.

Crank sensor : 12 teeth (with 2 missing teeth)
: magnetic type
TDC sensor : Hall type
injector : sequential operation

Thank you.....

Soungjae Hyun
Yeungnam University of KOREA

yabak1979@msn.com
cmdm-engineer@hanmail.net

[Frank]

we use honeywell GT1 sensor

take a piece of aluminium to use as a spacer plate

weld the block of alluminium to the rocker cover (is very difficult to do, so get someone who is good at welding aluminium)

tap a hole in it (you bolt the sensor to the block of aluminium)

drill a hole in it (for the sensor to poke through)

we just replace one of the bolts on the cam with a stainless steel bolt



now as for the crank sensor i dunno what is best..
but we used 8 teeth (none missing).. we make a crank wheel

i'm not sure if you can use missing teeth in sequential mode.. did you ask motec?

Frank

"These cars feel great..SIDEWAYS"

http://www.users.bigpond.net.au/franko/gt1.jpg
http://www.users.bigpond.net.au/franko/gt2.jpg
http://www.users.bigpond.net.au/franko/gt1.pdf

[yabak]

Frank~~~
Thank's for reply.
I've used your process already..
Your options is very similar to mine..
But I don't replace the bolt on the cam.
I used one projection for one signal per cycle
I think if the missing trigger wheel replace multy tooth type.... Perhaps it's possible..
Thank you.......

[gug]

has anyone else out there had problems with hall effect sensors at high speed (over 10k rpm)? our engine just about refuses to rev over 10,500, and i have a feeling it might be the sensor. we just broke one, and are considering changing to and optical system or something, so we will see if this solves the problem.
but anyway, back on track, angry joe from lehigh formula sae had this problem: angry joe's post (http://fsae.com/eve/forums?a=tpc&s=763607348&f=125607348&m=2186016603), anyone else?

"I come from a land down under,
Where beer does flow and men chunder"

[Moeye]

We had a problem with our engine losing power at 8,000 rpm. At 8,000 we get a sync error. After fiddling around for a while, we found out that backing off the cam sensor we're able to rev beyond 8k and make more power. It doesn't like to be too close to the bolts and magnets.

[Scott Harsila]

If you are running the dual sensor system(cam and crank) you cannot run a crank wheel with missing teeth. The crank wheel must have all its teeth evenly spaced. We have run the stock crank sensor and the MoTeC magnetic type cam pickup for 3 years now with good luck. We put a magnet in one of the bolts on the intake cam and grind down the other one. We weld on a threaded fitting on the side of the valve cover and install the sensor there.

University of Washington
Formula SAE 2001-2003

[This message was edited by Scott Harsila on May 05, 2003 at 02:16 PM.]