I would use Holley's 12-1

Holley EFI 556-185 6.25-Inch 12-1x Crank Trigger Wheel

Upgrading to an MSD Flying Magnet Crank Trigger Kit will deliver the precise and reliable signal that a high performance engine requires. This kit gives you the ability to control timing electronically through a Holley EFI ECU (or other standalone engine management system / ignition controller)...

www.holley.com

 

Would that be ok to use if my balancer is bigger than the wheel?

 

Could use this one.

Holley EFI 556-180 8-Inch 12-1X Crank Trigger Wheel

Upgrading to an MSD Flying Magnet Crank Trigger Kit will deliver the precise and reliable signal that a high performance engine requires. This kit gives you the ability to control timing electronically through a Holley EFI ECU (or other standalone engine management system / ignition controller)...

www.holley.com

 

Innovators West also does a 12 magnet balancer. That's what I went with.

 

Gotcha I know I can do that but already have the ATI on there and has been for a few years now. I’m converting over from Blowthrough and don’t really want to swap balancers if I don’t have to.

That Flying magnet trigger kit will work ok for this with a Hall effect sensor?

 

That Flying magnet trigger kit will work ok for this with a Hall effect sensor?
[/QUOTE]
It will work with the sensor you listed. 554-118 That sensor looks for magnets.

 

I got the the 554-118 and the 85141 with the flying magnets 6-1/4 inch balancer . Works good 👍🏻 just have to tune the delay some .

 

Hey Gino,long time no see. What ring are you using on the balancer ?

Thanks for that info ThirdGenRacer!

 

ATI will convert your balancer to have magnets if you send it in. Not sure if you need it super quick but that's what I've done a couple times.

 

The Innovators West is a nice unit but I have had to do some machine work to get them to fit an ATI dampener correctly using the male rabbit on the dampener meant to locate whatever pulley/mandrel setup. Not saying don't go that direction just beware it may not be a completely bolt on affair to make it fit correctly. With the relatively tight air gap to the sensor, using the bolts alone to locate everything is not a good idea and could result in contact especially at high RPM. It is a true 12 magnet trigger with all 12 in the negative orientation. I think the Holley posted is a 12 -1 so either 11 magnets and a blank or 11 negative and 1 positive. Hopefully one of the Holley guys on here can verify this on their trigger wheel and report back. Just my $0.02

 

All of our IW wheels are designed for the IW damper that have the 2.275-2.280" ID BBC pulley register. ATI damper's seem to have a wide range of ID register sizes so its not a direct fit like you have seen. MSD like to use the ATI's larger 4.75" OD register on their wheels (even though I have found lots of variance on sizes there too). That said, for a more "bolt on" fit, Hyperaktive Performance (and MSD more recently) have bolt on 12 (or 12-1) trigger wheels. I'd love to sell more wheels since that is my job, but explaining how to modify the wheel to work (for people who don't understand how to do it, unlike yourself) is a bit time consuming.

 

When i did mine everyone liked the holley 36-1. So i did it and my buddy did it on our bbc setups. Works great. Now a days i think ppl are moving away from them it seems im not sure if true or why, but for whatever reason dont see them recommended as much

 

Yep , no issues with mine either .

 

the 36-1 works fine,
but sheep these days see pro mods with 12-1 so thats what they do,

 

Is there any problem running a 2 wire analogue sensor next to a 3 wire square wave? Both msd sensors. 1 runs msd box, the other collects rpm data in Haltech box.

 

No problem at all. They are both low voltage, nearly zero current so no real way to make EMI/RFI.

 

I run a 4 mag MSD wheel on an ATI balancer with the Holley sensor, no problems for about 9 years now. Good luck!

 

Why no love for the hall with the magnet in the sensor instead of in the wheel?

 

Because anything ferris can trigger it(or false trigger it). With the sensor looking for a magnet there is zero possibility of false triggering it. Everyone I know that was having false trigger issues, losing RPM signal etc were all corrected by going to flying magnet trigger wheel.

 

nothing wrong with a simple 4 magnet either, not many really need a 12-1

 

Is there a benefit using the 12.1 over say a 36 tooth wheel?

 

Absolutely zero benefit using a lower resolution wheel like a 12 tooth.

36-1 has been used the world over on hundreds of millions of vehicles. It's simple, effective and it just works. And no bullshit with silly magnets and the like.