What is the max rpm you plan to run? You could try the 5ohm coils. What was your previous coil setup?
Maybe the battery is on its way out? I like to see over 13v when revving.
Dwell calculations
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
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If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Re: Dwell calculations
7500rpm max power, 8000rpm retard.
Ive fully charged my battery as constant stop / start / test in the shed has flattened it a fair bit, and i couldnt start it unless i jumped it. It still feels "fluffy" at ~5000rpm. But i suspect a weak battery can cause that.
im going to follow the flow chart HERE (pdf) and see if i cant turn something up.
Bikes dont start charging the battery till about 3000rpm+ on my bike, and if my stator is under powered, that would definitely be a cause. Ill investigate further.
Im still not sure on how to set the dwell. Its currently 8ms, and might be a reason why its still a bit "fluffy" as it wants 10ms.
I dont really want to buy new coils like the 5ohm model. I was recommended 3ohm as they are close to my stock units.
-----
EDIT
-----
That flow chart worked a charm.. Sorted the problem right out.. I had a 0.25v earth leak on the Neg side. Added a new wire in to make it more direct, and it went to 0.00v leak.. and bike made an instant recovery and charge is back to normal.
Ive fully charged my battery as constant stop / start / test in the shed has flattened it a fair bit, and i couldnt start it unless i jumped it. It still feels "fluffy" at ~5000rpm. But i suspect a weak battery can cause that.
im going to follow the flow chart HERE (pdf) and see if i cant turn something up.
Bikes dont start charging the battery till about 3000rpm+ on my bike, and if my stator is under powered, that would definitely be a cause. Ill investigate further.
Im still not sure on how to set the dwell. Its currently 8ms, and might be a reason why its still a bit "fluffy" as it wants 10ms.
I dont really want to buy new coils like the 5ohm model. I was recommended 3ohm as they are close to my stock units.
-----
EDIT
-----
That flow chart worked a charm.. Sorted the problem right out.. I had a 0.25v earth leak on the Neg side. Added a new wire in to make it more direct, and it went to 0.00v leak.. and bike made an instant recovery and charge is back to normal.
Come join the (non official) Megasquirt IRC live chat channel !
##megasquirt @ irc.freenode.net
viewtopic.php?f=92&t=33382&hilit=freenode#p204682 for more information.. see you in there !
##megasquirt @ irc.freenode.net
viewtopic.php?f=92&t=33382&hilit=freenode#p204682 for more information.. see you in there !
-
whizzo944
- MegaSquirt Newbie
- Posts: 2
- Joined: Fri May 07, 2004 10:08 am
- Location: North East United Kingdom
Re: Dwell calculations
A long time ago I saw a little program written by Bruce Bowling I believe, it was called
Ignition Coil Analyser I think. Does anyone have a link to this program if it still exists
somewhere on the 'net?
Dave.
Ignition Coil Analyser I think. Does anyone have a link to this program if it still exists
somewhere on the 'net?
Dave.
"In the beginning, the Universe was created. This made a lot of people
very unhappy, and was widely regarded as a bad idea."
HG2TG
very unhappy, and was widely regarded as a bad idea."
HG2TG
-
Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: Dwell calculations
Dave,
It's here: http://www.megamanual.com/files/softwar ... nalyze.zip Linked from here: http://www.microsquirt.info/dcoil.htm
There is also this: http://www.megamanual.com/ms2/configure.htm#dwell
Lance.
It's here: http://www.megamanual.com/files/softwar ... nalyze.zip Linked from here: http://www.microsquirt.info/dcoil.htm
There is also this: http://www.megamanual.com/ms2/configure.htm#dwell
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw