Building a TA AL block 535. MSD distributor, MSD box and and Fast direct injection system. Wanting to run in sequential mode so need a crank trigger that will match up with an ATI 7" super damper, chevy bolt pattern pully and a buick hub. ATI can add magnets to the shell but would need to get the pick up and braket all separate. Anyone have a set up that they use?
I had issue with the ATI balancer working on my stk crank motor.......it wanted alot of weight added in an area no weight could be added. Put a romac on and had to take weight out hot add. I bought a sbc trigger kit that was drilled for our patter and had a centering hub. So the aluminum hub just slips over our hub......its counter bored to be a snug slip fit then then trigger wheel centers on the hub. The bolts don't center the wheel. I had to make the bracket to hold the sensor arm......I believe the TA block has provision to bolt this too I dont see why the same couldn't be done with the fast wheel.......its alot thinner than the msd wheel. I later had the center hole opened up enough to be able to fit a socket in to be able to turn the motor over with a bar.
Tried the MSD flying mag and it is drilled for chevy pattern but the centering piece would need to be honed out to 2.2 inches to fit buick hub. Forgot to mention it's an internal balanced motor and the ATI was the only balancer I found. Yes the TA block does have a place to hook up a bracket. Do have a way but thought maybe one of the racers may have already figured a vendor that would work.
ATI has an option where the put the magnets in the balancer. That's what I have. For the pick up, I used a bracket my buddy makes for the Oldsmobile Racers. It was not a "bolt on" deal, but I got it to work.
The hub hole on my msd is much bigger than the buick hub. That's why I need the spacer......its internally back cut in the part under the msd wheel......then the bushing steps back down to fit the buick pulley. I didn't have this made I bought if from Tom in PA. He had it all figured out minus the sensor mount.....that was an easy part to figure out.....just weld a bracket to a fuel pump block off plate My ATI i tried was for an external balance........I thought it was chevy pattern/chevy hub, but buick weighted.......I wanted to use it to have a bolt on crank trigger option
Going with a Moroso bracket and inductive pickup they sell at Summit and have ATI add magnets into the damper shell located to align with the pickup for a 50 degree reference angle. No pre- made trigger/pickup from any vendor that match the chevy pully bolt pattern and Buick hub.
Hopefully last update. Did use the MSD 36103 crank trigger kit and ATI Buick 455 internal balanced damper without the magnets. The crank trigger wheel fit the Buick hub without centering rings perfect and bolted to the chevy pattern damper also. The trigger sensor bracket will need a second custom bracket fabricated as could only get one hole lined up to match the 50 ref angle, magnet and have a good equal arc to damper. If anyone wants a picture to see the setup, I will take one when I fab the other support bracket out of aluminum.
It doesn't look like the arc ofbthe sensor matches the outside of the wheel. Meaning......if you change timing be moving the sensor either up or down you are going to get a very drastic change in your air gap. It also means the pickup in the sensor isn't square to wheel so you might get s crazy difference from leading or trailing edge
Got it, just a first raw setup. Adjusting arch and centering on wheel. Still getting motor in. I am running a FAST EFI system so it is doing timing for motor at rpm or power changes. Only using for reference angle.
I would guess if only being used for a reference angle say 50*btdc and then the computer does the rest of time table.....the arc might not be as critical seeing it only needs to correct there.........I think fast uses trailing or falling edge signal
I used a SBC MSD. Machined the wheel to fit on the Romaic balancer. Redrilled the holes to Buick pattern. Made a bracket to bolt on the fuel pump mounting holes. Used the slide part of the Chevy bracket and bolted it to my home bracket. Worked great.
