Electronic ingition that maintains idle.

jamesp · Sep 3, 2012

I remember reading a while back that there is an electronic ignition on the market that helps maintain idle. Can anyone tell me which one it was? Thank you in advance.

Lorenzo · Sep 3, 2012

I recently purchased the pazon altair, but I still have to test it

jamesp said:
I remember reading a while back that there is an electronic ignition on the market that helps maintain idle. Can anyone tell me which one it was? Thank you in advance.

Bill G · Sep 3, 2012

I have had both a Pazon Smart-Fire and a Tri Spark ignition on the same bike, with FCR carbs. Both held a smooth idle with a slight edge going to the Tri Spark. The Tri- Spark did seem to make the engine a little more cold blooded. Matt ,from CNW, and comnoz have both told me it is probably a little leaner because of more efficient ignition.
Bill G

Whitworth Ranch · Sep 3, 2012

Tri-Spark inverts the curve at idle-ish rpm so that if revs drop it advances the spark and if it speeds up, the timing retards. There may be others but this is the one I run and like.

lbridges · Sep 3, 2012

I have a Pazon Altair, and there are no idle issues - steady at 900 with no need to blip the throttle or any other gyrations while sitting at a red light. The Altair, as I understand it, has emulated the Tri-Spark idle curve. Caveat: I also switched to a Mikuni carb at the same time, so hard to tell which one is the greatest contributor to a stable idle.

FastFred · Sep 3, 2012

Better Boyers do the same

Nortiboy · Sep 3, 2012

jamesp said:
I electronic ignition on the market that helps maintain idle. Can anyone tell me which one it was?

Trispark. It has idle stabilization in the curve.

Cheers

SGOUD2 · Sep 4, 2012

I have a Mikuni on my Norton 850 (73) with an early Boyer (± 1990) and I have a perfect idle; I also have original Amals MkII on my Bonneville T140E (79) with the original Lucas Rita E.Ignition and I also have a perfect idle. At red lights, the only worry I have is cars coming behind me!!!

MikeG · Sep 4, 2012

The Power Arc system supplied by Old Britts works well for me. My bike will idle smoothly at 1000RPM all day long.

Torontonian · Sep 4, 2012

I run an early Boyer unit but have two other later Boyer-Bransden units, a micro MK 111 and a micro MK 1V ( first one purchased at a swap meet , 2 nd is new ,recently on sale). I e-mailed Boyer asking about the differences between them /improvements/idle stabilization upgrades but got a generic answer with no specifics. Can anyone enlighten me re: why model changes and does it help idle ? I will fit this MK 1V if so. Thanks.

L.A.B. · Sep 5, 2012

Torontonian said:
Can anyone enlighten me re: why model changes and does it help idle ? I will fit this MK 1V if so.

Supposedly, the BB Micro MkIV will operate normally down to a lower voltage level than the MkIII, so kickbacks (and poor running?) caused by a partially discharged battery should be less of a problem with MkIV. I don't know if the MkIV advance curve has been altered, but none of the analogue ignitions currently available has any idle stabilisation feature as far as I'm aware, I think that would be beyond the capability of a simple analogue system (somebody correct me if I'm wrong).

http://www.boyerbransden.com/micromarkiv.html

The Boyer Bransden range of Analogue MKIII ignition units are being progressively changed to improved MKIV versions. The changes are designed to improve the timing stability if engine starting with a very low or variable battery voltage.

stockie2 · Sep 5, 2012

++++ On the Altair ignition system, went for a magic ride down the coast 150km and even stable idle, no foibles whatsoever. But I went to a bit of effort to set the twin amals fuel levels, and topped this off with a manometer balance. When the carbs are really in sync the engine transitions from on off throttle really smoothly. A note and not wishing to hijack this thread, I do not have the hard annodised slides, just standard diecast, but I found the hole for the throttle cable was formed correctly, and this was causing the cable to exit the slide on a slight angle, this was enough to interfere with the needle clip, and raise it slightly. Well worth checking yours next time it is out!

Cheers Richard

maylar · Sep 5, 2012

jamesp said:
I remember reading a while back that there is an electronic ignition on the market that helps maintain idle. Can anyone tell me which one it was? Thank you in advance.

That would be the TriSpark, which has something they call "idle stabilization". I can attest that it works very well.

L.A.B. · Sep 5, 2012

maylar said:
jamesp said:

I remember reading a while back that there is an electronic ignition on the market that helps maintain idle. Can anyone tell me which one it was? Thank you in advance.

Click to expand...

That would be the TriSpark, which has something they call "idle stabilization".

In fact, I think most, if not all, digital systems have that feature.

The Boyer Bransden Micro Digital and Micro Power systems do.
http://www.boyerbransden.com/microdigit ... power.html

To help engine power at idle, the timing can be advanced, on and below the idle speed, this stabilises and reduces the chance of stalling.

Snorton74 · Sep 5, 2012

TriSpark!!!'

ILLF8ED · Sep 5, 2012

jamesp said:
I remember reading a while back that there is an electronic ignition on the market that helps maintain idle. Can anyone tell me which one it was? Thank you in advance.

Think what you are referrring to is idle irregularity caused by the chain operated camshaft with cam accuated ignition timing. I recall this from many years ago that either the Lucas RITA or Boyer analog improved this by averaging the pulse frequency. The newer systems might do the same or even better, but for my recollection none of the current, newer systems were on the market when the statement was made.

Hobot · Sep 5, 2012

Any good cam drive triggered ignition should allow normal to below normal idle til battery gets low. There are 3 ignitions that can provide idle stabilizaion, the off the shelf Tri-spark and Boyer MD or the programable PwerArc Old Brit sells and can put what ever curve ya like in it but never had a request as it fires 3x's per stroke till rather high rev range.

Electronic ingition that maintains idle.

Jeandr · Sep 5, 2012

Don't forget Sachse and Ignitech, the Sachse is made for the Norton, has 2 of the 9 selectable curves that match the required advance and it has features like a test position that sparks continously to make sure everything is OK. The Ignitech must be custom adapted to a Norton, but it is fully programmable from a PC.

http://www.elektronik-sachse.de/index_en.htm

http://www.ignitech.cz/english/aindex.htm

another-ignition-consider-t4979.html?hilit=%20ignitech

Repetitive, but worth a look pazon-smart-fire-sachse-ignition-t9374.html?hilit=%20ignitech

Jean

tpeever · Sep 5, 2012

Boyer analog MkIII ignitions have worked fine for me. They run great and maintain a perfect idle. I have had a control box failure with the Boyer Micorpower but all the analog versions I have run (more than 6 bikes) have been perfect in my hands.

lbridges · Sep 5, 2012

hobot said:
Any good cam drive triggered ignition should allow normal to below normal idle til battery gets low. There are 3 ignitions that can provide idle stabilizaion, the off the shelf Tri-spark and Boyer MD or the programable PwerArc Old Brit sells and can put what ever curve ya like in it but never had a request as it fires 3x's per stroke till rather high rev range.

The Pazon Altair ignition has essentially the same curve as the Tri_spark. An earlier post mentions the benefits of the dip,

Electronic ingition that maintains idle.

jamesp

Lorenzo

Bill G

Whitworth Ranch

lbridges

FastFred

Nortiboy

SGOUD2

MikeG

Mikeg

Torontonian

L.A.B.

Moderator

stockie2

maylar

L.A.B.

Moderator

Snorton74

ILLF8ED

Hobot

Jeandr

tpeever

lbridges

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