i would like to have a tach for the hell of it and to help me time my car better so my question is will a gauge cluster with a tach swap with one that wont if the dont what do you have to do to make it work? 88 dl spfi 5 spd

It could be done, but it would require some rewireing. you'd have to rearrange everything to match all the connections for existing gauges. Then tap a wire into the neg(-) side of coil, or the ignition pulse wire of the ECU. Not TOOooo hard actually. Wiring the oil pressure unit would be an additional problem, but you could leave the idiot light operational, so you wouldn't be worse off.

If your dash is an analogue, not digital, with only a speedo, I would think another analogue with a tach would plug right in, but I could be wrong. The oil pressure and voltage meter would need to be wired in. If yours is a digital, then yes, there is a lot of rewiring to do. I did the conversion last summer, it's not hard, but it is time consuming.

If your dash is an analogue, not digital, with only a speedo, I would think another analogue with a tach would plug right in, but I could be wrong.

 

Sadly, I'm sure you are. It's not plug and play. BUT, all the wires are there in similar plugs, it's just they use different pins for most all of it. You could easily remove the wires pin by pin and reinsert in the proper connector to fit a tach dash.

 

The tach wire itself would have to be run, as well as power tapped for the Volmeter, and either an oil pressure wire run(requires installing sender into pump) or just swap the little panel that holds the *oil* light panel into the bezel, and keep the light only.