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Anyone installed an aftermarket tach? #1077845 04/27/15 06:10 PM
Joined: Nov 2010
Posts: 173
promodmerc Offline OP
Wheeler
I'm thinking about putting an aftermarket tach in and was wondering if it is possible. There is nothing wrong with the factory tach other than having to look down to see it.

I know with new cars it sometime is not possible or very difficult to add an aftermarket tach.

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Re: Anyone installed an aftermarket tach? [Re: promodmerc] #1077846 04/27/15 09:16 PM
Joined: Apr 2011
Posts: 326
Peabody Offline
Mudrunner
Being that the FE3 engine is set up with dual coils on the plugs and no distributor-type setup, I think you'll be looking at something like this...

12V ECU Tachometer Output
If you have a modern ignition system and your ECU (computer) has a dedicated 12V tachometer signal output you can use this to drive the tachometer. Use the SIG 1 (In-Dash Tach) or purple wire (Pedestal Mount Tach) input (see "Signal Hookup" in the instructions).

NOTE: Some ECU outputs are 5V which will not drive the tachometer. If you have a 5V Tachometer signal you can:

Contact us to special order a tachometer that will work with the 5V ECU signal.
Install a Tach Driver (see "Coil Pack or Individual Coils" below).

Here's the link to the FAQs page I pulled that info from:

http://www.marshallinstruments.com/faqs/detail.cfm?id=29

I didn't look at other mfgs' tachs. But I suspect others do something similar because everything is going solid state/ECU driven. So it's all becoming a matter of finding the correct wire out of the ECU and tapping into that signal. Makes me laugh because I grew up around motor heads and old school hop ups to squeeze more HP out of the engine. Now you just "chip it" to sup things up. I think it takes all the fun out of tweeking engines. Ah, but I digress...

Hope that helps <img src="/forums/images/graemlins/patriot.gif" alt="" />


1997 Sportage 4x4, auto-trans, Warn manual hubs, 4" UPYOURKIA front lift, TJ 106AA rear springs, 2-5/8" body lift, 31x10.50 treads, SmittyBilt SRC front and XRC rear bumper, swing-out tire mount, OBX LSD front diff, Track Finder rear locker, 5.38 R&Ps and... really crappy gas mileage! <img src="/forums/images/graemlins/shiner.gif" alt="" />
Re: Anyone installed an aftermarket tach? [Re: Peabody] #1077847 04/29/15 09:41 PM
Joined: Sep 2010
Posts: 19
9
97sport Offline
Need a Spot
Still related but almost exactly the opposite of the OP's questions, how would you run the factory tach with a diesel swap? Beings there is no ignition signal and only the "w" terminal on the alternator to pull a tach signal from, I'm lost. Any ideas? I'm planning a VW turbo diesel swap this coming winter with a Toyota trans and case, Acme adapter, and the tach and speedo are two major obstacles I'm looking at. Using the factory gauges and idiot lights has become a priority beings my GF will be driving the car from time to time.


'97 Sporty, 4wd/MT- Mazda/Aisin manual hubs, ghetto cold air intake. Planning- Mechanical OD auto/Dana 300 swap, SAS, and a little tooob...
Re: Anyone installed an aftermarket tach? [Re: 97sport] #1077848 04/30/15 05:31 AM
Joined: Apr 2011
Posts: 326
Peabody Offline
Mudrunner
Depending on the year of the VW diesel, you may have to replace the KIA ECU with the ECU from the VW donor, or replace the ECU plus the instrument cluster and some other items due to VW's "immobilization" features (anti-theft). But I believe the immobilization functions can be deleted from the ECU by those with the knowledge and programming tools.


1997 Sportage 4x4, auto-trans, Warn manual hubs, 4" UPYOURKIA front lift, TJ 106AA rear springs, 2-5/8" body lift, 31x10.50 treads, SmittyBilt SRC front and XRC rear bumper, swing-out tire mount, OBX LSD front diff, Track Finder rear locker, 5.38 R&Ps and... really crappy gas mileage! <img src="/forums/images/graemlins/shiner.gif" alt="" />

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