Custom Digital CDI - xBhp.com : The Global Indian Biking Community

abhijeet080808 · 11-01-2009, 05:09 PM

Hi guys, I am really excited today!

I have been struggling to make a custom CDI for the past 2 weeks or so. And, today the bike finally fired.

I will be updating details about my CDI here on this thread. Right now, the CDI is operating under static timing. I need to get the base timing right before tweaking the dynamic timings. Programming required for this is almost done. I will also add a TPS to the CDI to vary the timings under load. When the project is done, rider will be able to vary the timing in real time while the engine is running at any speed.

I want a few help here. This will make my project that much easier to complete.

1. How may degree before TDC is the trigger coil (pulsar coil) located. On my bike the stock timings are 10 deg BTDC at 1000 rpm and 28 deg BTDC at 3000 rpm. Is the trigger coil at 28 deg mark or more? (I do not have a strobe light, hence the question.)

2. At what voltage does the ignition coil operate? 100V appears to be somewhat weak. Upto how much can the ignition coil tolerate? (I do not have a CRO too!

)

PS - The bike is P150 Classic.

ken cool · 11-01-2009, 10:23 PM

Topic Approved

cool_dude_sunn_y · 11-02-2009, 01:48 AM

Great job Abhijeet

Although i cannot provide u any kind of help but i am excited too and would love to know how much u spent on making this?

atul_astro · 11-02-2009, 03:19 AM

wow..you made the whole thing out of scratch?

jd666 · 11-02-2009, 06:42 AM

Great effort there.

the ignition coil ratings can be checked in the service manual or from the OEM manufacturer spec. Im sure you can get your hands on the service manual.

abhijeet080808 · 11-02-2009, 09:18 AM

Yeah, I made the thing myself. It costs hardly 1000 bucks. About the specs, no, the service manual does not have them.

And, it is an AC CDI. Any help to the questions there?

Edit - You have the OEM maufacturer specs?

Joel · 11-02-2009, 02:38 PM

Post pics of your CDI. Would like to see.
Have u covered the box with epoxy?
What TPS u using?

Andante · 11-02-2009, 05:21 PM

Ah, cool. Finally something in the technology corner of things. I remember you talking about this a while back in the Fuel injection thread. And you finally built it.

It would be really great to get some more details on this project of yours. I'll be following this thread closely.

abhijeet080808 · 11-02-2009, 05:46 PM

Quote:

Originally Posted by Joel

Post pics of your CDI. Would like to see.
Have u covered the box with epoxy?
What TPS u using?

Nah, why should I bother with epoxy. It is NOT a commercial project.
Right now, it has no TPS. Its at the very first stage now. All that will happen slowly as I progress. Pics will come shortly.

Quote:

Originally Posted by Andante

Ah, cool. Finally something in the technology corner of things. I remember you talking about this a while back in the Fuel injection thread. And you finally built it.

It would be really great to get some more details on this project of yours. I'll be following this thread closely.

Thing are happening slowly on this one! For instance, today I did not even get a chance to work on this.

insane_x97 · 11-02-2009, 05:55 PM

good going bro,
best o luck...
waiting for more details,tuneup..
i have a lot o questions for you....
as far as i think you are using alternator,s ht current, which should be near about 300v.but i could be wrong !!
anything about waste spark??

11-01-2009, 05:09 PM	#1 (permalink)
abhijeet080808 ElectroniX! Join Date: Sep 2008 Location: BLR/GHY/MAS Posts: 2,375	Custom Digital CDI Hi guys, I am really excited today! I have been struggling to make a custom CDI for the past 2 weeks or so. And, today the bike finally fired. I will be updating details about my CDI here on this thread. Right now, the CDI is operating under static timing. I need to get the base timing right before tweaking the dynamic timings. Programming required for this is almost done. I will also add a TPS to the CDI to vary the timings under load. When the project is done, rider will be able to vary the timing in real time while the engine is running at any speed. I want a few help here. This will make my project that much easier to complete. 1. How may degree before TDC is the trigger coil (pulsar coil) located. On my bike the stock timings are 10 deg BTDC at 1000 rpm and 28 deg BTDC at 3000 rpm. Is the trigger coil at 28 deg mark or more? (I do not have a strobe light, hence the question.) 2. At what voltage does the ignition coil operate? 100V appears to be somewhat weak. Upto how much can the ignition coil tolerate? (I do not have a CRO too! ) PS - The bike is P150 Classic. __________________ Your biking tells a lot about the person you are!

11-01-2009, 10:23 PM	#2 (permalink)
ken cool Super Moderator Join Date: Sep 2005 Location: New Delhi Posts: 4,677	Topic Approved __________________ The Wheel was a great invention; Two Wheels with a Motor in between was even better! BMW Motorrad Days 2011 Xbhp's Indo-French Kashmir-Ladakh Tour

11-02-2009, 01:48 AM	#3 (permalink)
cool_dude_sunn_y Sunny Join Date: May 2004 Location: Jammu, J&K, India. Posts: 189	Great job Abhijeet Although i cannot provide u any kind of help but i am excited too and would love to know how much u spent on making this? __________________ Nothing is IMPOSSIBLE. The word itself says I M POSSIBLE

11-02-2009, 03:19 AM	#4 (permalink)
atul_astro League Apart Join Date: Oct 2008 Location: Andheri [E] Mumbai Posts: 384	wow..you made the whole thing out of scratch? __________________ 83' RD350 HT 96' RXG 97' RXZ 91'RX100>09'RX165 2010' HH ZMR

11-02-2009, 06:42 AM	#5 (permalink)
jd666 Senior Member Join Date: Sep 2009 Location: Gurgaon/Faridabad Posts: 3,390	Great effort there. the ignition coil ratings can be checked in the service manual or from the OEM manufacturer spec. Im sure you can get your hands on the service manual. __________________ My offerings to the gods of speed - - KTM Duke 200 - Yamaha RXZ 5 speed

11-02-2009, 09:18 AM	#6 (permalink)
abhijeet080808 ElectroniX! Join Date: Sep 2008 Location: BLR/GHY/MAS Posts: 2,375	Yeah, I made the thing myself. It costs hardly 1000 bucks. About the specs, no, the service manual does not have them. And, it is an AC CDI. Any help to the questions there? Edit - You have the OEM maufacturer specs? __________________ Your biking tells a lot about the person you are! Last edited by abhijeet080808; 11-02-2009 at 09:20 AM.

11-02-2009, 02:38 PM	#7 (permalink)
Joel Race Concepts Join Date: Jun 2004 Location: Bangalore Posts: 1,844	Post pics of your CDI. Would like to see. Have u covered the box with epoxy? What TPS u using? __________________ joel@raceconcepts.in

11-02-2009, 05:21 PM	#8 (permalink)
Andante Alien on two wheels Join Date: Jan 2009 Location: Ahmedabad Posts: 416	Ah, cool. Finally something in the technology corner of things. I remember you talking about this a while back in the Fuel injection thread. And you finally built it. It would be really great to get some more details on this project of yours. I'll be following this thread closely.

11-02-2009, 05:55 PM	#10 (permalink)
insane_x97 ਰਾਮਗੜੀਆ Join Date: Sep 2008 Posts: 204	good going bro, best o luck... waiting for more details,tuneup.. i have a lot o questions for you.... as far as i think you are using alternator,s ht current, which should be near about 300v.but i could be wrong !! anything about waste spark??

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