TACH (1 OF 1)
Now that this beasty boy is running good, I’ll be using it as a daily driver and watching how the engine and transmission behave. I thought it would be beneficial to have a tach in the cab to monitor the RPMs while I drive. I found this discussion going on recently that helped me decide what tach to install.
http://67-72chevytrucks.com/vboard/s...d.php?t=481747
After rummaging thru old threads, it looks like a factory tach for my truck would have been up to 5000 rpm.
So I decided on a 0-4K RPM AutoMeter 2890 - - - >
http://www.summitracing.com/parts/ATM-2890/?rtype=10
I ordered the tach from Summit and it arrived in just two days. With it, I also got a $50 certificate for future purchases and free stickers, what a great deal ! It took me a couple of days to install and it was a fun job to do. I had to buy some electrical connectors and that’s about it. To protect the paint on the steering column, I lined the inner surface of a hose clamp I had on hand. I also set 1/8" diameter wire shims near the wireway on the bottom of the steering column so I wouldnt crush the wireway. I used a piece of fuel hose for a conduit to get the wiring off the steering column and under the dash. I used a lot of plastic tie wraps to secure everything but I had lots of those already.
The 4K range seemed kinda short at first, but so far I haven’t pegged it. The trigger plugs directly into the tach connection on my MSD ignition and no adapter is needed (unlike some other tachs I looked at). The needle hangs out at around 2K for most of my driving which is smack dab in midrange. The light at night fits in well with the stock lighting on the dash, too.
Here is the finished installation. It looks like it belongs there, that’s always a plus.
After driving around for a while, here are some of the RPM figures I’ve come up with (under light throttle).
MPH……....…RPM
20………....….900
40…………...1800
60…………...2700
70……….…..3150
Idle (in D)...650
I’ll be back to edit this post when I obtain mo bettah RPM data.
All in all, its a cool little tach.
AutoMeter LoRev Tach...................$.101.90
Electrical parts for tach installation........2.69
Total..........................................$.104.59