A little more progress on the EFI 461. The Holley 60-2 wheel is now mounted on the balancer, and a crank trigger bracket has been fabbed up and installed on the timing cover. The bracket positions the sensor face .020 above the tooth surface, and the maximum run out of the tooth OD on the wheel is <.002/inches. This precision run out and close sensor gap insures a solid signal for the crank timing. The bracket has a radial slot which allows adjustment of the position of the sensor in an arc around the crank C/L to position it correctly relative to TDC. The sensor position is set at 10 teeth after the “gap”, which is 60 degrees BTDC. The ECU takes over from there to establish engine timing.
Special thanks to Mark at Luhn Performance for all the hard work he did designing and fabricating the crank trigger bracket and the serpentine belt system. There are not many serpentine belt options out there for a Pontiac using an electric water pump, P/S and A/C-that includes an adjustable belt tensioner.
I still need to finalize the pulley spacing with the Gates laser alignment tool, and then it’s off to the anodizer. The motor is set in the chassis and is almost ready to light off.
Really happy with this system, and thanks again to Mark Luhn who has been great to work with.