Dual Sync Distributors are designed to work with aftermarket EFI systems including Holley EFI as well as other EFI systems that support Hall Effect crank and cam sensor inputs. While these distributors are designed to be used primarily in sequentially injected installations, you can easily use them as a crank trigger for TBI system also. The precision machined shutter wheel design ensures accurate timing, even at very high engine speeds.
How Does A Dual Sync Distributor Work And When Do You Need One? - 04/19/2021
Conventional distributors use centrifugal weights and springs to affect the engine timing. Essentially the faster the distributor spins, the more the weights move away from the center of the distributor, and that alters the engine timing in turn.
Although that design worked well enough for decades of automotive applications, it’s not exactly cutting edge tech by today’s standards, and it isn’t particularly user-friendly when it comes to tuning. - Read More
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