xflow electronic ignition

[Ross]

Recently accquired Caterham 05, Tach registers double the actual value...Tach experts (Noisonger) advised, if working, may be ok, check installation. Unit (electronic ignition)appears only inside distributor, no points, just a small black box sitting where the points used to be.....which manufacture or type is the best for this set up? There are no external electrical units installed with this ignition.

 

I have checked rear of tach and ran thru all the available setting options, no difference.

 

The manufacturer identification is not readily apparent....an option would be to replace it with a new and improved electronic ignition, any suggestions?

Bob

[locost7018]

I put a Petronix ignition in my xflow and had no problem with the tach. What did the previous owner have to say about it? Look on the tach and see if there is a switch for number of cylinders: 2/4/6/8. Sounds like it is set on 2. Russ

[lowflyer]

The Pertronix unit shouldn't have any effect on the tach readings.

 

I agree that the tach is set up incorrectly.

[Ross]

Thanks for your comments....as pulse is coming out from coil, a bench tach registers correct engine RPM, then must be a problem with the tach. Have ordered a replacement tach,# 71261. Anxious to see if that will solve the problem.

Bob

Caterham S3

+8 Morgan

TVR Vixen

[Ross]

Received new tach, same PN from Caterham....when installed it ran up past 8,000 RPM and pegged. After laboriously checking all connections & wires, ignition and coil out put found nothing wrong.....further looking at back of the original tach that came with the car, I noticed at the switching settings a "very small" hole with an indented arrow...made an adjustment and read correctly, problem solved. Previous owner must have used it this way for years.

 

BTW a new repacement tach (Caterham) has no adjustments on the back other than replacing a lite bulb.

Bob