Tinkers Rides rb30 to delco

[Tinker]

It sounds like its loosing sync. Can you have a look at the REF signal on a scope and see if its clean?

Yes i will look into that.

Also also have questions about distributor ref signal , output from the camera type module. Does my signal need any conditioning before the ecm.

As i am running the rb30 dizzy ,cardboard cutout 6 slots approx 5deg wide . gives a square wave output . straight into dis ref .

I have pulled apart the 3x 18x setup, I could have looked at the output from that for dis ref sig,


After looking back over my post on page 7 there is a good diagram showing 60' high the 60' low , this is not what i have . will go back and try again.

[antus]

it should be 5v peak to peak square wave with no or very minimal square wave. When we did the nissan cas its 8v signal was very noisey. We tried 4 or 5 modules from the wreckers, all were the same. Then we got new aftermarket and the noise went away and so did the problems.

If you just want it to work the delco dis on non dis egine thread with a usa or rodeo v6 cas and manufacture a balancer trigger might be a better option. The nissan system isnt great.

[Tinker]

Ok , So did a couple of tests with my first disc - clean PW signal from 35ms down to 4ms with disc high to lo 30 deg (camshaft)

And a smallest PW of 1.ms with disc with a 5deg hole, Signal looks good.

The est bypass does the same thing with both discs goes HI after 400 then goes LO at the drills fastest speed witch is about 2000 rpm .

At this time i think i will continue with making a ignition module and see what happens

I am still thinking that the problem is more to do with my bench setup ( sensors not connected etc )

[antus]

Thats a logic scope though, you need to see the analog version to see if there is electrical noise or something wrong with the signal which the logic analyser is dealing with but which could be causing problems from the ECM. I posted a trace back here and you can see noise spikes, and it was a lot worse on the bad CAS modules. You wouldn't be able to see that on the logic analyzer though. viewtopic.php?f=16&t=425&start=60#p117378

I doubt its your bench setup, the logic trace looks fine and sensor missing wouldn't affect it only above a certain RPM. I've been though hell with this system in the past so I guess I'm burnt and you know what our solution was in the end.

[Tinker]

So I found someone to 3d print out my disc , came out pretty good (for a test anyway) .painted black to stop any light getting through. on my bench setup found it to run better but still not perfect. Going to try it on my engine asap and see what happens .

A couple of things i found out after buying a old harmonic balancer of a V6 VR ecotec. / VN buick (series 1?) and ecotec sensor rings have different spacing and will not interchange .

Also The high and low spacing is not the same as you would think looking at the output on top of page 7 / 18x 10deg high 10 deg low . The width is approx 12.5mm wide and 10.5 mm wide ( have not worked out degrees) .If i had of known this at the start i think i would of changed my disc spacing to match. could be the reason i am loosing sync.

Anyway just putting it out there if someone goes down my path. Anyone out there confirm VN buick v6 18x rings have the same spacing (width)?

[pman92]

Looking at the 3d printed part and paper part pictures the edges of the 3x look to line up with the edges of the 18x?

Doesn't the 3x sync work by counting the 18x transitions during a 3x sync pulse? There for the edges should be offset?

EG. The 3d printed one, the largest 3x slot has 2x 18x transitions inside it, but its hard to tell if the outer 2 are or not

[antus]

There are some pics and the timings on the VN/VP here viewtopic.php?f=31&t=1015#p11532
Nothing not already talked about.

[Tinker]

Looking at the 3d printed part and paper part pictures the edges of the 3x look to line up with the edges of the 18x?

Doesn't the 3x sync work by counting the 18x transitions during a 3x sync pulse? There for the edges should be offset?

EG. The 3d printed one, the largest 3x slot has 2x 18x transitions inside it, but its hard to tell if the outer 2 are or not

If you look at page 4 you can see that the beams in the rb30 cas are not in line they are offset . The cas sensor for the delco inner and outer are in line. So what i did was made the 3x ring in CAD able to rotate as one . Then checking with the smallest notch with logic analyser so it lined up with an 18x transition. The spacing will never look like the delco rings spacing. Hope this makes sense to you .

[Tinker]

Ok I have everything hooked up and connected . Tried for a engine start and was no good ;-( . Back to checking the basics its got air and fuel (injectors are firing) but only has spark on 1 coil out of the 3 . This is a vn s1 coil pack with the 3 coils moulded into one unit. I am sure that the dfi module is ok as i have had it running on the bench. Looking for someone that could lend (or sell cheap) me a coil pack to test setup. I don’t want to buy a new one as i think i will go crank trigger even if my setup works. Anyone out there help ?

[Holden202T]

man its making you work for it! but its getting there!