ATS_Aaron
X-
- Location
- Shady Shores, TX
Does anyone have a schematic of the CDI? Or is this resistor size and location just ancient knowledge that has been past down since the dawn of Superjet time?
Aaron
Aaron
superjet cdi modification
- Thread starter waxhead
- Start date
infamy
Westside Freeride
:haha: he said schematic :arms:
Sanford
ECF
- Location
- Freeride capital of the world
josenagg
josenagg
- Location
- jacksonville florida
I have some pics for instructions, and five sets of the 500ohm pots and five sets of the 36k resisters .? offers jnr7001@comcast.net
djyox
Old school -not by choice
- Location
- Twincities, MN
djyox
Old school -not by choice
- Location
- Twincities, MN
So is there a step by step dummy guide?
I think I understand what to do, unless you need to remove something? Or am I just soldering onto?
Don't SBN's have somewhat of a limiter in them anyhow? Not that I'm going to be trying to do WOT all the time, but it will hit it once in a while, and don't want to fry a motor... Knowing this would help me figure out if I should go limiterless, or adjustable limiter....
I think I understand what to do, unless you need to remove something? Or am I just soldering onto?
Don't SBN's have somewhat of a limiter in them anyhow? Not that I'm going to be trying to do WOT all the time, but it will hit it once in a while, and don't want to fry a motor... Knowing this would help me figure out if I should go limiterless, or adjustable limiter....
chrisdoc0608
insulting
- Location
- rocky mount, nc
are the 36k resistors and 500ohm pot the best setup to use if i want to go adjustable? to increase rpms do i increase resistance or dearease it? which is better, the straight elimination of the rev limiter, or the adjustable mod? i read that doing the elimination eliminates the timing curve, what effect does that have?
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I am a bit confused....those are two 36 Ohms resistors, and what I think is a 500 Ohm pot.
that's a far cry from the 50k resistor and 50k pot mentioned earlier. What givers?
CDI Testing
I tested two 6m6 and three 61X ignition boxes for rev limit and timing. I tried my best to do each test the same way using the same engine on the same day, it may not be very accurate though. I found that the rev limits varied greatly and the timing was nearly identical between boxes. One 6m6 box from a 93 Superjet revved to 6400 rpm. The other 6m6 box was from a 93 Blaster and revved to 6900 rpm. All three 61X boxes I tested (from unknown boats) measured from 6700-6900 rpm. I measured about a 500 rpm increased limit per 10k ohm reduction. Decreasing the resistance much below 60 ohms seemed to mess up the function of the limiter. The overheat sensor always worked the same and the timing did not change. I was very disapointed that these ignition boxes do NOT retard timing at high rpm. They start at around 14 degrees at low idle and go to 20-21 degrees at around 3000 rpm and stay there. This does not seem to be creating problems but does seem to be a dangerous situation for pump gas, especially when the squish clearence is reduced.
I tested two 6m6 and three 61X ignition boxes for rev limit and timing. I tried my best to do each test the same way using the same engine on the same day, it may not be very accurate though. I found that the rev limits varied greatly and the timing was nearly identical between boxes. One 6m6 box from a 93 Superjet revved to 6400 rpm. The other 6m6 box was from a 93 Blaster and revved to 6900 rpm. All three 61X boxes I tested (from unknown boats) measured from 6700-6900 rpm. I measured about a 500 rpm increased limit per 10k ohm reduction. Decreasing the resistance much below 60 ohms seemed to mess up the function of the limiter. The overheat sensor always worked the same and the timing did not change. I was very disapointed that these ignition boxes do NOT retard timing at high rpm. They start at around 14 degrees at low idle and go to 20-21 degrees at around 3000 rpm and stay there. This does not seem to be creating problems but does seem to be a dangerous situation for pump gas, especially when the squish clearence is reduced.
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- Location
- South Florida
This needs to go in the TECH FAQ.
hermanns
poor
- Location
- gainesville, fl
it already is
WILKEY
SO FAR CHANGE SUCKS!!!!!!
i knew i should have payed attention in tech. class oh well!!!!!!!!!!!!!
for surf is this any advantage?
for surf is this any advantage?
If you're not comfortable taking a dremel to potted electronics and modifying those onboard electronics, I would suggest looking for one that is already modded or having RIVA or Pro-Tec do it.
Or just send it to me and I will mod it for you and you will save about $70 of what you will pay the big shops. Send me a working CDI and $55 and I will send you back a modded adjustable rev limit CDI.
Foximus
CFL Cheapass.
- Location
- Oviedo, Fl
So if you guys know all this somebody take the next step on how to reprogram the CDI to advance and retard more.
Mike W
Infidel
- Location
- North Florida
Don't EVER let a rookie ride your ski.:nono:
The stock CDI is not programmable. The curve is generated with an analog circuit, it can't be reprogrammed.
If you want programmable, look into MSD TL, Advent, or the WAX Racing CDI.