or is it that easy to fab up?

 

Pose the question to Haltech. I asked the same thing a couple years ago when I built my first trigger and was told more magnets won't make a difference.

 

If you are interested drop me a PM. They're not difficult to make depending on what you're running for front cover, pulley, and whether or not the ac and power steering are intact.

 

to bring this back online so others can benefit:
from this link:

http://www.efi101.com/forum/viewtopic.php?t=1936

"Hello Chris,

The E11v2 uses an equilivant 32-bit processor to the MCP565. Neither of these are "Degree" based systems, as both these components are time based (as this is the way any computer functions)

Using a 60-2 motronic wheel is a very good trigger system. The more teeth the trigger has the more resolution the ECU will have. The timing split on the E11v2 did have a 2 degree variance some time back, which was fixed in current firmware.

If there is anything else we can do please let me know,

Kind Regards,
Scott Hilzinger
Haltech Sales / Support

 

Ok. I'm willing to eat a little crow on this. Talked to Eric today and posed the direct question about added teeth (or magnets) on a trigger wheel. To paraphrase his response; it will, theoretically, add a greater degree of accuracy to the ignition events. Practically speaking it's probably not going to do much. If one were to setup a multitooth trigger it would need to be similar to the FD trigger in that the home tooth could not be within the same arc as the trigger teeth. It would need to be on a concentric arc inside or outside of the trigger teeth and two sensors would need to be used. In multitooth mode the ECU will not correctly recognize a home event through the single sensor. This can only be done in standard mode.

Seeing as how guys like Enzo250 and Ari (and any number of guys in the piston world) have reliably put down huge numbers with the same standard trigger we started the discussion with I just don't see a need to overthink the solution. If there were a real advantage one would think the guys at Haltech would be aware of it.

 

I'd imagine also, seeing as how there's only one stroke being completed for each front and rear rotor in the 360* of crank rotation, that you're already accurately covering the spark event for that face of the rotor. So more magnets wouldn't exactly make it more precise given that nothing else is "happening" between the existing magnets.....no?

 

I absolutely agree that any advantage is theoretical, but would bet that there would be some measurably greater accuracy for the sequential injection, as inj events fall in between ignition events. Of course added accuracy on injection events would be of very little use.

Perhaps it would recognize events from the same sensor in custom rotary mode

 

Hmmmm!

-J

 

We changed servers a while back and all our links were broken. Just reposting the pics because I've had people ask about them.

 

Does it matter where the magnets are positioned on the pulley, or just as long as they're 180* apart?

 

The #1 magnet should align with the sensor between 50 and 70* BTDC. So, depending on where you place the sensor the magnets can really go anywhere. If you're building a setup from scratch figure out where you're mounting the sensor first. The align the engine at 50-70* BTDC front rotor and at that point the #1 magnet should be under the sensor.

With some ECUs it's vitally imperative that the magnets are exactly 180* apart or you'll have a difference in ignition timing between the front and rear rotor. With the E8/11 Haltechs, or any ECU that has independent cylinder timing trim, you can trim out slight difference in magnet placement.