karolh

Is the verdict still out, or is anyone in a position to say just how good / reliable the chinese manufactured electronic ignition system (CH clone) is compared against the CH unit, which in my opinion is the industry's standard.

Karol

Antique

My Feedback: (4)

Now you've done it, another product war....
Bill tested all the other ignitions....He is now selling the rc exl Chinese ignition with his label on it....Good enough for me, I use Bill's US made circuit in all my Zenoah conversions and the Chinese C&H with engines that use separate ignition boxes....0 problems.If I converted the engine I will replace any of either one that ever fails, no charge...Beat that
FWIW, Bill and I are the only ones that have been doing this continuously for at least 20 years, we probably have a good idea of what works and what doesn't...

karolh

No desire to start another war of any kind here Ralph, but rather just asked the question on a need to know basis [8D]

Your reply explains it well enough, and if it's good enough for both Bill and yourself, that's a good indicator that it is a reliable product. I prefer the option of having the circuit housed in the engine case as it helps reduce the possibility of RF interference.

Karol

pe reivers

The RCexcl ignitions I tested were good. The Chinese know a thing or two about electronics.
Are they RC clones? I doubt that. The RCexcl fire at 40 degrees BTDC when turned over slowly.

Antique

My Feedback: (4)

Still don't know why, the engines I put the exl ignition on got timed at 28 and run really well, didn't even try 40....It the timing is indeed 40 there has to be a way for that ignition to retard about 36 degrees for starting, then stop at 28 at WOT..Makes no sense to me....

copperclad

hi
does anyone have a link to the RCexcl ignitions , thanks , dana

tkg

My Feedback: (1)

The main reason CH is selling the ECEXL is simple, $$. How many times have you read here on RCU "Where is the cheapest place to buy xxxxx...."
We have a large box of foreign made ignitions, from bad to awful. The RC Exl was the first that showed promise. We asked RCEXL to make some changes and they did so we are now selling direct the RCEXL ignitions. A 10mm(CM6) or 14mm single is $79.95, the same in twins is $99.95. This is with a computer timing curve matching ours and a shielded plug cap.
The built in the USA CH unit is now ultra heavy duty for the UAV programs, and we will still them to the public. These units are repairable, the CHEXL units are not.

TrikeFlyer

all of the CDI ignition systms fire where you set the sensor (hall effect) on the crank case snout in relation to the magnet embedded in the prop hub.

None of these boxes fire at any BTDC by themselves. They only retard the spark once flipped and running. Then as rpms increase the amount of retard decreases until you reach the point of "advance" where you initally set the sensor to fire the EI from the magnet passing by.

YOU control the dregrees BTDC that the EI fires at, not the EI module by where you place the sensor IN RELATION TO the piston in degrees BTDC.

Tired Old Man

My Feedback: (1)

Hate to tell ya this, but you most definately CAN change the internal timing on the CH syncro spark. Not gonna tell ya how, but there's three different advance positions that I'm aware of.

Antique

My Feedback: (4)

Actually 4, at least on the older ones...20 degrees total advance or 26 degrees total advance, full advance at 4000 or full advance at 6000...I really like people who tell me about my my product...
NONE of these ignitions ? I guess 18 years of making ignitions didn't tell me anything..
An ignition with no electronic control fires wherever it's initially set..Mine had no electronic contlrol..Smaller engines were set at 28 and never changed...larger engines had a mechanical control that was linear from 2 BTDC to 28 BTDC when the throttle reached wide open...
All my G26 conversions fire at 28 degrees, using the C&H HD circuit with no electronic control..Larger sizes have syncro spark....

Tired Old Man

My Feedback: (1)

Sorry Ralph, didn't mean to get ya goin'. My response was directed to TrikeFlyer and his description of how ignitions do and don't function.

karolh

So far so good, peace still reigns within this thread, and for sure it is certaintly helping me understand a bit more about the ignitions on our engines and how they work.

Karol

copperclad

hi
i've done a few searches for RCEXL , ECEXL , and chinese ignition , still no luck finding a link , thought maybe someone here would take a minute and post it , thanks again , dana

pe reivers

The RCexcl, have one curve, on a time basis. Principal timing at 40 btdc. After that, the curve is time controlled exponentially to sort of match an rpm curve. This then is inversed 1-1 ratio to the pic that gives the signal to the discharge electronics to fire the coil and generate the HT voltage for the spark. It seems complicated, but it is not. If the starting flip is anywhere near i.e. 700 rpm, the ignition can calculate the delay, keep it there up to 2000 rpm, and then advance from max retard to min retard (the electronically inversed curve). Inversion is at midpoint. So if you set the ignition at 40 degrees, and it must fire at 4 degrees btdc in idle, with final firining at 28 BTDC, the midpoint bias is 16 deg btdc. This is of course not rpm, but time, since electronics care a hoot about rpm.
Main thing is, that if you flip the prop dicicively during starting, you will have about 5 degrees spark advance, and when rpm rise, the advance will proceed progerssively to 28 or even 32 degrees btdc.
Like any electronic "intelligent" system, it only has one form of reasoning. The engine will bite you, if you play with the prop with ignition turned on, Do it right, and there will be no problem at all.
What is right?
once you turn the ignition on, flip that prop like you mean busines, and nothing else!

Antique

My Feedback: (4)

rccdi.com
go to google, search rccdi, follow the link

copperclad

thank you RCIGN1

krayzc-RCU

My Feedback: (31)

cool

karolh

I visited the rccdi.com site and saw the specifications of their ignition circuit. Not being a electronic person it meant very little to me, however what caught my attention was the rpm range of 0-8000. My question is, what happens when it is used on an engine that has the ability to rev beyond this limit.

Karol

Antique

My Feedback: (4)

TKG has one on his G20, it works well over 8000 rpm...[8D]

jpanhalt

I'm just guessing, because there is not more information on the RCCDI site. But by analogy to the open source CDI thread, I assumed the rpm limit was based on the maximum current available from the intermediate voltage conversion. That is, is there enough current to fully charge the ignition capacitor in less than 7.5 ms (i.e., greater than 8000 rpm). The capacitor will still fire, if it's not fully charged, and remember that charging is exponential. That is, the last 25% of charge takes much longer than the first 25% of charge. One doesn't know where the manufacturer drew the line in setting its specifications. I suspect at higher rpm, one might see missing until the rpm fell to a point where there was enough time between cycles to charge the capacitor enough to get a reliable spark.

John

CopperheadAV

Karolh mentioned an RPM range of 0-8000. This is typical range, not the maximum. At 8000 RPM the Rcxel draws 3000 mA. The maximum draw is 8000 mA at an unknown RPM. We are working with RCCDI to come up with an instruction manual and further specs that are a bit more understandable. I will also come up with a clear explanation on choosing the correct hall sensor for a given application. Their English is not that great but they do their best. I will post on our web site later in the week and include the instruction manual with all the units we sell.

Cheers,

Antique

My Feedback: (4)

UHHH...You might want to read that again, 11000 MA ?
How's "there" spelling ?

CopperheadAV

LOL,

About as good as mine Notice I edited once, maybe I should go back for a second try! Sorry, 8000 mA.

Your a good man Ralph. Did you get your Stuff??

Antique

My Feedback: (4)

Got it, been running the 45, am finishing a G45 lite to compare with the DL50 and your 45

CopperheadAV

Good Deal, Thanks!!!