Ignition Advance

[NorthWisBanshee]

Hi all, I have a question about timing. I was talking to a engine builder and he told me that its better to run a ignition system with a revised advance curve than to just advance it 4 degree or whatever. On a engine modified for more top end RPM, after a certain RPM, the engine needs less timing and needs to start retarding, and if you use a degree key or advance the stator plate you will have too much timing(advance) at the top of the timing curve. Does this sound right to you guys.

[Aussie Quad Racer]

yes for maximum performance you want a taylored ignition curve to suit you engine.

 

Unfortunatly these cdi systems are costly and require dyno time to set them up.

 

A cheep and afordable option is the stator plate or offset keyway

[NorthWisBanshee]

I agree about the cost issue. I am im the process of rebuilding my Shee now and will most likly get the adjustable stator plate, but isn't the Dyna FS ignition supposed to give you a better advance curve or curves.

[Big Blue]

when you advance the ignition it helps on the bottom end right? and ignitions are expensive unless you are out of other things to buy or your motor absolutely needs it.

[NorthWisBanshee]

Big Blue, I have trouble reading your posts, all I can see is your avatar! WOW!

[alcoholbanshee]

I have stayed out of these DYNA posts for too long now. Dyna is a great product.....but with that being said. Most of the top builders in the country have tried the DYNA and have gone back to the stock setup. Why? Because there is vary little if any advantage to the DYNA product. Look at most full out drag bikes out there they are running stock setups. Dan Hull from A&S is running stock CDI's on all of his bikes. Except the triple and he uses a Rotax Mach Z setup on that. Guys you can spend a lot of money on this stuff and really gain nothing. Now lets talk about boost bottles,reed spacers v-force reeds and ported stock cages for that matter.

[BdBanshee]

I agree. I have had people that already owned the DYNA, have me modify their stock plate to advance their stock ignition. And then they sold the DYNA because they said it didn't work as well.

 

I have not personally tried the DYNA, just going from what customers told me.

[a&sbanshee]

i run a stock igniton on my 350 which was built by dan hull and i spoke with him about the aftermarket ignitions and he said they were not worth the money and i was better off running stock. the best way to find ya sweet spot is to play with it and adjust it degree by degree and look at track times but if u cant get to a track or dont drag race try starting around +5-+7 with lil or mild porting this should work well and it has also proven its self on full blown drag motors

[bradrs]

The dyna ignition gives not only a tailored curve that should allow you to dial in appropriate timing much better than you could possibly do with the stock ignition and a timing plate, but it also gives increased spark energy. Not everyone is comfortable with adjusting timing curves, so the other options like timing plates, etc. work good for them. There are quite a few engine builders building high power banshees with Dyna ignitions.

 

The stock curve was designed for a stock engine. Once you start playing with the engine, it is going to need a different curve to get the most out of it. Things like pipes, port work, etc, will have different effects on the timing requirements at different RPMs You might be able to match the peak power, or come close to it, by tweaking the timing with a timing plate until you get it right at that one RPM. But what about the rest of the RPM range? The Dyna allows you to tweak ALL of the points to your liking. Is this something you need? It all depends on how much you want to get out of your quad. I know some of the shops we sell to make their own custom curves to work with their specific engine packages.

 

BdBanshee, without knowing more specifics, I can't exactly explain to you why your customers liked the timing plate advance more. But if you programmed the dyna ignition to match the advance you were adding on the timing plate, I'd bet they would have been at least as happy.

 

I don't want this to sound like a sales pitch, I generally just read this forum to keep track of what is going on with banshees, but I felt as though there was a little misunderstanding in what the benefits are of a timing plate vs. an aftermarket CDI.

 

Brad

[jsekula]

I run a Dyna FS on my Shee. It's reliable and a nice fat spark. The different curves are great to experiment with, and usually you will find one of the four your bike likes. If you know what your doing, you can always remap it. One of the best things is no advance key to break, another is retaining your lights and not worrying about charging a battery. It has been worth the cost to me.

[sredish]

Don't know if this is true, but I was told that the dyna will yield another 6 horses on the dyno. don't know how much translates into the wheels, but just wondering what you guys thought about that. it's hard for me to part with 4 bills for something I'm unsure about.