Quote:
Originally Posted by Coupe89
My book mark must be at work...
My shift light is like this.
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Dittos... Raptor in the AC grille = mine too.
Note: There are only two of the five LEDs lit in the photo, as the LEDs are caught running through a start-up light pattern. All 5 are very bright, and even in sunlight, you won't miss 'em when the light comes on!
I'm with Dom (and others) in that you don't really want to be watching the tach while racing - a shift light is soooo much better, and there is NO LAG with them either.
No need to remove dash, just use a coat hanger wire to fische the wires to the "C-100" bulkhead connector. Refer to the FSM for the proper white tach wilre. Tap into that, and then a "switch ON" power source and a ground point. Voila!
Sluggish?
Is your tach sluggish, or does it simply read low? If there is simply an error where it reads low, it is a relatively easy fix that you can do yourself, but the cluster does need to come out because it involves clipping the old resistor out of the circuit and installing one of the proper value to calibrate the tach. Let us know - the procedure is well known and several here, including me, have done it and can walk you through it.
Some lag is normal. If it is not a question of accuracy, but truly one of lack of respnse, is it really slow, or is it just "normal"? I'm not familiar with some of the better competition tachs, far as comparing the stock ZR-1 goes. But, I wouldn't be too surprised is the stock tack was less responsive that some high-end tachs you may be familiar with.
The stock tach is driven by a dual op-amp chip, receiving pulses from the ignition module (under the plenum). There is some lag, and the lag is greater with the rate at which rpm is changing. So, I guess the question is how much is too much?
Unless you can harvest a op-amp from an 1990+ cluster PC board, you might have to send it off to one of several places to have a new chip installed - usually for $150 to $250 (prices I ran across) - assuming your tach is actually
more sluggish than normal (hence the use of a shift light instead of the tach needle).
P.