UPGRADING THE TACHOMETER FOR USE WITH ELECTRONIC IGNITIONS





Page 2

---

Figure 3: Rear of tach circuit board.

This new hole is about 0.375 diameter and is shown as No.1 in Figure 4.

This is also a good time to locate and drill a 0.250 hole to gain access to the calibration pot so that you can adjust the response with the tach in the dash. This new adjusment hole is No. 2 in Figure 4. Measure both of these hole locations carefully before you start drilling!

---

Figure 4: Case modifications.

This is a good time to paint the indicator needle with a matching fluorescent red paint. This is frequently found in model shops, where you can also look for a rub-on decal numeral'8' to replace the'4' in 4 CYL if you are using the 7K Alpine Tach. You should replace the rectangular metal loop from the original pickup (without the white ignition wire).

---

Figure 5: Completed tach assembly.

The finished assembly is shown in figure 5.

All that's left is to reinstall the tach, connect it to the tach input Many thanks to Gary Winblad in developing this handy and economical modification to allow you to run an OEM tach with a state of the art ignition system. Tom Hall connection on your electronic ignition, and adjust the calibration pot for proper readout. Remember that it will be most accurate at one engine speed (RPM), so you can tune it for red line or for a more commonly used freeway cruise speed.

Many thanks to Gary Winblad in developing this handy and economical modification to allow you to run an OEM tach with a state of the art ignition system.

Tom Hall

---

Our thanks to STOA and Tom Hall for this article.

If you would like a more detailed look at this article, it is available in Adobe PDF format. This takes a while to download, and requires you to have the Adobe® Acrobat® Reader, free from Adobe.

(click here!)

If you have the Reader now, get the STOA Tach Article now, or get the reaader (above), it's good for lot's of other web stuff.

1 | 2 |

	+ The Roots of Rootes   + History of the Tiger   + Tiger Model Overview   + Tiger Production   + People & Pioneers   + Workshop Manual   + Factory Race Equipment   + Literature: Books   + Articles & Videos   + Advertising   + See Rootes Resources		+ History of the Tiger   + Sunbeam Tiger 2005   + Early Race History   + Ken Miles, an appreciation   + The "Beastie" explained   + The Playboy Pink Tiger   + Casting a Light on Lucas   + LeMans at Goodwood 2002   + Monterey Historics 2003   + My Life With Cars   + See Articles & Humor		+ High Perf. Exhaust   + Tiger Dash Restoration   + 350 Lunati Tiger   + Installing a T5   + Sound Advice   + Installing New Carpet   + The Ackerman Angle   + "Cool It Buddy"   + 3 Point Belts   + Tiger Rotisserie Plans   + Tiger E-Mail List Archives   + See Technical Tips		+ Tiger Club Information   + Events Calendar   + Service Directory   + Owner's Gallery   + Buyer's Guides   + Contributing Editors   + Team Tiger Updates   + Photo Gallery   + See Online Resources