Factory Tachometer Install with EI - Resistorr Size for use with EI Dizzy

Paint, body preparation and modification, interior work and electrical
datzenmike
Supporter
Posts: 5305
Joined: 24 May 2006 12:40
Location: Van. Isle.

Re: Factory Tachometer Install with EI - Resistorr Size for use with EI Dizzy

Postby datzenmike » 17 Jan 2018 16:47

As current is the same anywhere in a circuit, being ahead of the coil or after may not matter... BUT it must be in line.
"Nissan 'shit the bed' when they made these, plain and simple." McShagger510 on flattop SUs

User avatar
Byron510
Moderator
Posts: 11768
Joined: 01 Jul 2003 23:06
Location: Maple Ridge, BC

Re: Factory Tachometer Install with EI - Resistorr Size for use with EI Dizzy

Postby Byron510 » 17 Jan 2018 18:44

datzenmike wrote:As current is the same anywhere in a circuit, being ahead of the coil or after may not matter... BUT it must be in line.


I do recall though reason of deduction that this inductive pick up won't work in line on the negative side from the coil on the way to the distributor.

I am not an electronics guy, but I do know that the sensor wire around the inductive pick up coil on the 510 factory tach only works on the (+) side before the coil.
And I believe it is polarized - in other words it works better in one direction better than the other - kind of like the inductive pick up for your timing light that clamps on your #1 plug wire.

Hope that helps.

Byron
Love people and use things,
because the opposite never works.

qwik510
Supporter
Posts: 3155
Joined: 29 Oct 2006 18:51
Location: Maryland - East Coast USA

Re: Factory Tachometer Install with EI - Resistorr Size for use with EI Dizzy

Postby qwik510 » 18 Jan 2018 03:25

There were two different tachs.

Early tach with 4 wires and later one with 3 wires. Which one do you have?

Check out this article that was on the DQ written by the late, great Randy York.

http://dimequarterly.blogspot.com/2011/ ... meter.html



" Early 510 Tachometers

The white needle and early orange needle tachs use an inductive pickup to detect the signal. These have two white wires that are connected in series with the coil. They should be wired as follows:
· Black wire to ground
· Green wire to +12 V
· Two white wires in series to the negative side of the coil. If it does not work try reversing the two white wires.


Late 510 Tachometers

The late orange needle tachs use a single wire that connects in parallel to the coil. These tachs have a single circuit board with more modern electronics, just like the late model circuit boards we are using here for the upgrade/repair. They should be wired as follows:
· Black to ground
· Green to +12
· Black with green stripe to negative side of coil. "
Enjoy The Ride!
David
ImageImage

datsun.dave
Posts: 26
Joined: 01 Mar 2017 21:52
Location: Calgary, Alberta, Canada

Re: Factory Tachometer Install with EI - Resistorr Size for use with EI Dizzy

Postby datsun.dave » 18 Jan 2018 22:28

Hey Guys -
Thanks for posting this Qwik510 as that is the article that I based all my work on - and it says negative side. But Byron's post and a couple others clearly say positive... SOOOOO, I am going to try + tomorrow and see what happens. I definitely have the 4 wire tach - with the two white wires. It is an early orange needle.

I will post results tomorrow to clarify what I end up with!
Thanks for all the input guys!

dw
David Wilson
65 WPL410 Wagon
67.5 SRL311 #00050
68 SPL/SRL311 Racecar project
72 510 Sedan - L18 w/Webers and Dogleg 5 spd
74 260Z - L26 w/ Triple Webers and 280ZX 5 spd
88 Be-1
89 Toyota HiAce Work Truck
91 Figaro

510rob
Moderator
Posts: 4614
Joined: 09 Oct 2003 23:37
Location: Vancouver, BC
Contact:

Re: Factory Tachometer Install with EI - Resistorr Size for use with EI Dizzy

Postby 510rob » 27 Jan 2018 09:08

Dave, did you find a solution?

datzenmike
Supporter
Posts: 5305
Joined: 24 May 2006 12:40
Location: Van. Isle.

Re: Factory Tachometer Install with EI - Resistorr Size for use with EI Dizzy

Postby datzenmike » 27 Jan 2018 21:30

?
"Nissan 'shit the bed' when they made these, plain and simple." McShagger510 on flattop SUs


Return to “Body & Electrical”



Who is online

Users browsing this forum: No registered users and 3 guests