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-   -   Can't understant Rcexl instructions. (http://www.rcuniverse.com/forum/gas-engines-142/11286275-cant-understant-rcexl-instructions.html)

skystreaker1a 11-04-2012 07:16 AM

Can't understant Rcexl instructions.
 
Has anyone installed a Rcexl ignition with automatic advance on any gassers? I recently bought a Rcexl ignition cdi with automatic advance to install on my 3.2 Brison engine. The Brison had cdi with mechanical advance which I did not care for. I though installing the Rcexl unit was gong to be a pretty straight forward installation but after reading the instructions that came with the Rcexl module, I'm at a total loss.
The way I understand the instructions, you set the engine timing 28 degrees before TDC and than slide the hall effect switch over the magnet located in the prop hub and when the plug fires, you fasten the hall effect switch down and your good to go. Correct me if I am wrong, but aren't you going to be starting that engine with the spark set at 28 degrees BTC. I always though when one started a gas engine, the spark should be set near TDC or a few degrees ATC to make starting easier with no kick back. Now if this engine starts 28 degrees BTC and you rev the engine up to full throttle and the Rcexl cdi also automatically advances the spark, the way I understand things to work, you’re going to have a plug firing at 56 degrees BTC at full throttle. With an engine running at those specs, its going to run hot and not gain full speed. I can understand setting the timing 28 degrees BTC if the Rcexl didn't have automatic advance, but with automatic advance, I can’t see how this setup can work.
Thanks for any feed back.

BadAzzMaxx 11-04-2012 07:32 AM

RE: Can't understant Rcexl instructions.
 
The ignition retards the timing about 25 degrees when you flip the prop and then advances as you rev the engine, hit full advance at around 4,000 RPM.

If you have it set and fixed at 28 to 30 degrees you are ready to go. Just do not do a lazy flip when you start the engine.

Milton

dirtybird 11-04-2012 09:22 AM

RE: Can't understant Rcexl instructions.
 
I think the mechanical advance is best.
When you open the throttle, the spark is immediately advance rather waiting around for some electronic chip to make up its mind

Donairplane 11-04-2012 09:48 AM

RE: Can't understant Rcexl instructions.
 
I feel the mid range throttle responsewas much better with themechanical advance,
throttle always felt more linear. I still use it and like it!

Don

w8ye 11-04-2012 10:02 AM

RE: Can't understant Rcexl instructions.
 
1 Attachment(s)
My Brison 3.2 with mechanicl advance and it has the CH brand ignition.

http://images.rcuniverse.com/forum/u...88/Nk27901.jpg


All Day Dan 11-04-2012 10:33 AM

RE: Can't understant Rcexl instructions.
 
Sky, Go back to the mechanical advance for trouble free performance. Dan.

pe reivers 11-04-2012 11:56 AM

RE: Can't understant Rcexl instructions.
 
That was not his question. Milton gave the right answer.

captinjohn 11-04-2012 02:14 PM

RE: Can't understant Rcexl instructions.
 
skystreaker, click on the PM and send me a privite message please. Thanks Capt,n

bcchi 11-08-2012 09:02 PM

RE: Can't understant Rcexl instructions.
 

Quote:

ORIGINAL: captinjohn

skystreaker, click on the PM and send me a privite message please. Thanks Capt,n
Your Black box ignition is nothing but a reworked C&H system. I sent him a lot of my old inventory. I am happpy that he is doing repairs on our old C&H systems.
BCCHI

closetguy 11-09-2012 04:28 AM

RE: Can't understant Rcexl instructions.
 
i had John make up a ignition for me(Black Box)and i don't know what parts you sold him.but out of all the ignitions i have, i get a wider,bluer,louder spark out of it, then any of the others(DA,Rcexl,and even CH ignitions,but those are getting up in age.

captinjohn 11-09-2012 07:30 AM

RE: Can't understant Rcexl instructions.
 

Quote:

ORIGINAL: bcchi


Quote:

ORIGINAL: captinjohn

skystreaker, click on the PM and send me a privite message please. Thanks Capt,n
Your Black box ignition is nothing but a reworked C&H system. I sent him a lot of my old inventory. I am happpy that he is doing repairs on our old C&H systems.
BCCHI
Bill, I would say you picked a guy that is really into ignition systems and he will make good use of the inventory you sent him. I sure enjoy reading the postings John has in the forum called "engine conversions". Thanks again for the items you sent me. I got my grandson into electronics at the age of 10 and he got straitA marks in High school. He went on to collage...again he was top in his class. Hehas a very good jobnowand is doing super.

Now the rest of the story....He can fly RC airplanes like easy as eating pie, but then he met a nice young lady and now his mind is elsewhere. I did wanttoo get him into flying gas airplaneswith the items you sent & witha RX system...ect, get him into gas airplanes.But It will be a bit more time before he comes out of the clouds! Maybe next year we can put all the goodies together and get him flying gas airplanes. Anyway,I have not forgot your very nice gesture and Iwill get my grandson Andy back on tract. Best Regards & Take care. John & Dawn

pe reivers 11-09-2012 11:47 AM

RE: Can't understant Rcexl instructions.
 
Give your son some time for the hormones to subdue. Like all of us, he will have to go there, do that, and be back.

av8tor1977 11-09-2012 12:52 PM

RE: Can't understant Rcexl instructions.
 

Quote:

ORIGINAL: pe reivers

Give your son some time for the hormones to subdue. Like all of us, he will have to go there, do that, and be back.

yeah, but with a lot thinner wallet...

AV8TOR

pe reivers 11-09-2012 02:17 PM

RE: Can't understant Rcexl instructions.
 
VVBG


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