Magnetic & Hall-Effect Crank/Cam Sensor Setup

[Danny Cabral]

Just gonna order the MSD Flying Magnet and Holley DIS coils and go from there. Thanks.

Since you're holding me accountable for using a crank trigger, I should mention one last detail:
"Another advantage to using a 60-2 crank trigger kit with sequential injection & waste-spark DIS, is the ability to run the engine solely off of it, if the cam sync sensor fails. If you have a laptop computer* with you, enter the Ignition Parameters and change the Cam Sensor type to "Not Used" (non-sequential mode), and continue on your way. A nice emergency capability, that's not possible with a conventional 4x crank trigger (such as an MSD Flying Magnet kit)."
* FYI: The 3.5" & 5.7" LCD Touchscreens can also change Global Folders (create a non-sequential emergency GF), by storing them on the SD Card. And now the Digital Dash is also capable of storing/changing Global Files, except it's stored on a USB flash drive.

http://forums.holley.com/showthread....nk-Trigger-Kit (The above statement is an excerpt from my forum thread.)

[mhinchley]

Cool. I never take the car too far from home unless it is on my trailer with a winch. I prefer the ease of install at the moment. I'm actually an aerospace machinist, but have so much work in front of me for the foreseeable future, time is of the essence.

[Gravensg]

496, BBC Gen VI, one pulse per fire, cam sync from distributor. CNP

So, in the instructions - 1.2, it states do not place a crank reference angle (CRA) > 75. If I do this my timing no longer coincides to the ECU requested timing. However, if I put 90 in the CRA the ECU asks for 10 degrees and 10 is what I get. I can move the dist. Here, there and anywhere in between till it dies and never get the timing make to move. If I place 75 in the CRA, I need to put 0 in the ECU in the timing window to get 15 degrees on my light.

Any idea on what is the down fall of a CRA number > 75. Car runs good, making 650 on the dyno but wanted to figure out what if anything I am going to hurt. Oh, if your cylinder correct it works as designed. Cheers

[Danny Cabral]

I need more information:
Are you using a distributor for cam sync only?
Are you using a crank trigger kit? If so, OEM?
Is the crank sensor Hall-Effect or magnetic?
CRA? Do you mean Ignition Reference Angle?

[Gravensg]

Distributor is cam sync only, CNP/COP using LS2 coils.
I am using a stock GM configuration, the crank reference is 4 lobes...all OEM.

Hall-Effect, I think FAST calls it CRA, or how far away is #1 from TDC.
I guess I still have some translation issues to work on.
Sorry about the grammar, Apple likes to decide for you if you're not paying attention.

[Danny Cabral]

Distributor is cam sync only, CNP/COP using LS2 coils.
I am using a stock GM configuration, the crank reference is 4 lobes...all OEM.

OK, I understand your dilemma now. You're running a GM Gen VI "1 pulse/fire" (OEM) crank trigger, but can't adjust the crank sensor position because it's cast into the timing cover and the trigger wheel is keyed to the crankshaft. So you're forced to use the Ignition Reference Angle for alignment. Apparently, the GM Gen VI Ignition Reference Angle is 90°, but the Holley EFI manual states not to set it higher than 75°. I'm not familiar with this particular situation, so my advice is call or contact Holley Tech Service (Link) if we don't receive an answer here.

Any idea on what is the down fall of a CRA number > 75. Car runs good, making 650 on the dyno but wanted to figure out what if anything I am going to hurt.

The Holley manual may state that for other LSx engines. If your timing is fully synchronized with a 90° Ignition Reference Angle, then it's good and it can't hurt anything.

[strtcar]

I've read this post over & over, and the manual, but I'm still unclear how to install my crank trigger & cam sync.

302, HP EFI, LSx coils, Ford Explorer cam sync (3-wire), Innovators West 4 magnet balancer & Holley crank sensor.
I've got no balancer installed yet, no cam sync installed yet. What are the steps I need to follow?

[Danny Cabral]

I've read this post over & over, and the manual, but I'm still unclear how to install my crank trigger & cam sync.

You'll probably need someone to help you.

302, HP EFI, LSx coils, Ford Explorer cam sync (3-wire), Innovators West 4 magnet balancer & Holley crank sensor.
I've got no balancer installed yet, no cam sync installed yet. What are the steps I need to follow?

For your application, follow steps 1.2 & 2.1.

[strtcar]

OK, today I had some time to figure this out, see if my pics/explanation look correct.

1) I found TDC, used a piston stop/tool to find exact TDC, rotated on compression stroke until reached TDC, then rotated the other way, split the difference and put pointer to 0°.





2) Rotated engine to 60° BTDC, moved crank sensor mount so it now is inline with one of the magnets.





3) Rotated engine to 195° BTDC, put cam sync in with arrow on the cam sync tool pointed straight forward.

[Danny Cabral]

2) Rotated engine to 60° BTDC, moved crank sensor mount so it now is inline with one of the magnets.
3) Rotated engine to 195° BTDC, put cam sync in with arrow on the cam sync tool pointed straight forward.

Yes, that's what the instructions state.
You don't need the OEM cam sync sensor tool. The alignment tool isn't used for an aftermarket (Holley) EFI system.
Align the trailing end of the semicircular vane (in the direction of rotation), with the center of the Hall-Effect sensor.

[viciousride]

Yes, that seems like what the instructions state.
You don't need the cam sensor tool; just position the falling edge
of the semi-circular reluctor in the center of the Hall-Effect sensor.

Hi Danny, is this what you mean?


Bigger image here: https://goo.gl/photos/WreatimmSjDmnNgr5

[Danny Cabral]

Hi Danny, is this what you mean?

Yes, the falling edge in the direction of its rotation.

[viciousride]

Yes, the falling edge in the direction of its rotation.

Turning clockwise, here's the falling edge of the reluctor centered in the window, which also corresponds to the center of the cam sensor when the cap is bolted back on. Cam sensor is installed at 195° BTDC on cylinder #1. Is this all correct?

[Danny Cabral]

Turning clockwise, here's the falling edge of the reluctor centered in the window...

If that cam sensor's semi-circular reluctor turns clockwise, then that's the rising edge, not the falling edge.

[viciousride]

Oops, my mistake. Engine turns clockwise, cam sensor reluctor turns counter-clockwise. So in current position, the reluctor edge will be rotating counter-clockwise passing the sensor "beam", and thus digital falling. Thanks!