Drag Racing Discussions > Front Engine Dragsters

First 1/4 mile runs

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H.G. Wells:
Jon, the one on the FED is not a play back tach. Just memory (tattle tale or highest RPM) and it is an old Autometer that works with the internal coil Vertex. Along with the Autometer shift light for the same application, neither of which they make anymore.  It is useful for top end RPM recording, if you turn it off for the burn out. Have also caught some missed shift points with it.

I do use a newer Autometer play back in the drag boat that has a SM3 with varied results. Lots of interference. It is a true play back in real time and when it records it give good info.  I will try to find the part#   So being a low tech guy I built a gauge panel with a mechanic drive tach, boost gauge, fuel pressure, and oil pressure gauge and parked a go pro in front of it. I believe I got the idea from the Kinsler catalog with a picture of an old can-am car with a similar set up and a big old 8mm movie camera.

Just an analog guy in a digital world.

roadster27:
I run a MSD 7AL and set the shift on an electric solenoid to shift at the rpm I want , have only looked at the tach 3 times , I let the trans brake go at 4000 rpm , kph vs mph conversion is approximately x.62     , 233 = 144 mph

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