I have had a silver dot tach in my car for years but when I went to MSD ignition the tach no longer worked, which was not too surprising, but what was surprising to me me that a newer black plastic dot tach worked fine.

How can I get a silver dot tach to work without changing the "guts". I really don't want to add a Tach -Adapt" since I know the newer tach works fine - I just want all my gauges to be the same - Silver Dot.

What is the difference inside to the circuitry?

Thanks in advance!

EDIT: MSD 6AL, Mallory distributor and MSD Blaster coil.

Get a TachAdapt from Bob Ashlock

http://ashlocktech.com/

Oh you don't want one....well good luck with that.

I have a MSD red box if you want to try it...

Thanks Mark,

I will probably go ahead and buy one of Bob's tach adapters but adding one more point of failure for me is never a good thing.

I am a few weeks from firing up the restoration project and after looking at my gauges I might open them up and paint the needles anyway as they aren't as orange as they should be.

That Tach Adapt is really a great product. Bob is a super nice guy as well. He's been selling them for quite a while.

Modify with new guts, I agree with making it look OEM. Glance over my DIY thread for upgrading your tach in my signature.

I put a later (black dot) tach guts into my early model face and put the silver dot needle back on. I did this to use the later guts with damping to remove the tach overshoot designed into the 914 tach.

I will check out your thread - thanks!

EDIT: How did I miss your upgrade thread - brilliant - cheers!

I will try it since I have to open it up to paint the needle anyway and I have about 5 tachs to play with.

It's a pretty good upgrade for 30 some bucks,

Already ordered and I will do that to one of my spares - thanks again for the research and the documentation!

I may have a extra adapter plate laying around. I'll see if I can dig it up for you after my MCAT exam on Thursday.

Thanks - I would gladly buy it - I figured that might be the toughest part of the upgrade!

Good luck on the MCAT exam. Focus!