[Diy_efi] Ignition IGBTs, going foran upgrade

[Mike]

At 01:58 AM 5/20/06, you wrote:
>IGBTs designed for ignition use are extremely easy to use. Active snubber circuit included and logic level drive. This is my old experimental DIS ignition project where I used IGBTs.
>
>http://www.kolumbus.fi/juha.niinikoski/DIS/Dis.htm


Thats a nice web page btw Juha, thanks  and also thanks to all who have 
responded to my initial post... :)

The darlington/ICs are, imho, cheapie old tech which chew up a few
volts and the few RB30 modules I have seen are quite variable in
quality. I've done an updated variant which gives a higher striking volts
and a higher sustained volts, runs cooler and has a couple of diagnostics.

Hopefully it will reduce fuel consumption a tad, especially if I can run
a little leaner in the cold winter weather here in Western Australia,
my initial experiments suggest the original RB30 (darlington) module
isnt as effective at firing a leaner mixture as the unit I have built but
this is influenced by the spark plug type.

For example:- The bosch 4 point plugs are great if and only if one runs the
standard tuning for the VL/RB30 or run a little richer but it is not
nearly as effective as a basic NGK conventional plug when it comes
to firing lean mixtures. The difference is like chalk and cheese and
completely reproducible and quite surprising for me <shrug>

The point also is the old rb30 module's new price is quite high and sure
I could troll for s/h units but might be worth bringing out an updated
unit and see how this fares for fuel consumption issues.

I'm curious if anyone on this list has a skyline or VL with the RB30
motor and is prepared to trial one for a few weeks with before and
after fuel figures, ie. Has anyone with that module already kept
reasonably good fuel consumption records ?



Regards from


Mike
Perth, Western Australia
VL Commodore Fuse Rail that wont warp or melt !
Twin tyres for most sedans, trikes and motorcycle sidecars
http://niche.iinet.net.au