SUGO CDI for Borut... (ignition curves)

[EEKNOWS]

yes true Lozza, but if your carburation is up the shitta it isn't going to help.
One main jet size can make a hell of a difference, ditto Nozzles and Needles.

Carburation makes a difference to the what it's like to ride, but not that much to the output, unless your talking single cylinder 125's and smaller.

[jools]

you are kidding of course...............

[mbsteve]

Not really, I have seen a few times on the dyno that changing one jet size on the mains resulted a 5 hp change.

[41juergen]

So as shown in my project post I have build up my own CDI tester. Can somebody loan my a -80 CDI to get the data out of it?
cheers
Juergen

[Yuri]

I am willing to lend Borut my 9A cdi

[41juergen]

From what I know is that Borut is doing some special development for some companys, so don't has much time at the moment. Thats the reason I try to help him out with the testing...
Anybody who will loan me a -80 CDI?

[Yuri]

From what I know is that Borut is doing some special development for some companys, so don't has much time at the moment. Thats the reason I try to help him out with the testing...
Anybody who will loan me a -80 CDI?

I can borrow you my 9a but if it breaks you have to replace it ....
The timing will be close but the powervalve timing will not be the same as a 80

[Paul]

I would really like to test a 4dp cdi
BUT it means very little as putting that info into a programable cdi doesn't mean it's exactly replicated. I honestly believe that.
There are pulse differences and differences in how the units behave relative to voltage. Other chaps could verify this in better. Where 26 deg on a oem cdi is 26 it could be 31 on a prog. And this will vary.
The best way to replicate a oem cdi is to run the bike on a dyno and tune the prog cdi to what the bike responds well to. It really IS NOT rocket science and there are no great mysteries and hidden secrets to make a bike run well and better than an oem CDI.
The only thing the japs were adding to those boxes were little tricks with air jets and TPS and 3D mapping to get their bikes past emissions testing to be sold in theirs and other peoples countries. Who really wants all that?
so you want to replicate a "80" sugo box. Take your best sugo "replicated" bike and reverse engineer the settings by doing dyno runs. Else I really don't believe you're going to get the same results as cut n pasting them off an oscillator or whatever.
Sorry boys.

[ybk]

There's an 80 on yahoo at the moment...

http://page.auctions.yahoo.co.jp/jp/auction/191000930

[Paul]

so you want to replicate a "80" sugo box. Take your best sugo "replicated" bike and reverse engineer the settings by doing dyno runs.

i mean reverse engineer the settings onto a prog cdi thats plugged into the bike.

i add to that fuel plays a part, even pump gas. and in the early '90's they were running avgas leaded 101. i reckon the 80 CDI was made for avgas. which means more advance than unleaded.
also your head volumes
using a sugo box on a bike that is not an exact sugo kit bike is shooting in the dark. it'll cost you less to fit a zeel and nip down the dyno and set it up for the way your bike is tuned.
but having said all that, if someone sells "exact" copies of sugo boxes loaded onto zeel's, they'll sell a bucket full.

[Yuri]

If you do not have money for dyno time and can only afford a zeel ....
And having a sugo point to start from must be less dyno time

I can only see money saved

   

[Paul]

If you do not have money for dyno time and can only afford a zeel ....
And having a sugo point to start from must be less dyno time

I can only see money saved

and that's why they will sell, you have missed my points there yuri
1. you cant copy and paste to replicate as there are variations is how the units work relative to voltage and spark strength
2. it is not going to be ideal anyway as we use different fuels today and sugo cdi's were only designed for sugo machines

[Yuri]

The one SPR cdi is a unleaded cdi

[41juergen]

@ Yuri and Paul: you are right, the SUGO is designed (only) for a complete kit incl. AVGAS. I don't want to use the data for setting up my bike as I will go with unleaded 100 ROZ and a different harware setup. But I would like to get the data into my EngMod simulation to learn more how close the simulation and dyno reality can be.
I made first tests for a 3XV5 with stock ignition, carbs incl. rubber restriction but a Jackal exhausts and the result is already very close to what the Yamaha data sheet showed.
So Yuri would you loan me your unit, of course I will send you a other one if I would damage yours (what I definitifly will not do!!!! )?
cheers
Juergen

[Yuri]

Ok send me your address
If you can get Carl to send you his unleaded spr that map will be interesting