84CUCV
3/4 ton status
on 241 can it be done? thanks
CK5
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electronic speedo to mechanical speedo
- Thread starter 84CUCV
- Start date
Yup!
Just buy an 89 NP241 tailhousing with the correct gears for your application.
Just buy an 89 NP241 tailhousing with the correct gears for your application.
84CUCV
3/4 ton status
damn i was hoping i could switch them. not that easy thanks
Why not just make the electric work? Not that complex, better than cable!
84CUCV
3/4 ton status
i was just thinking since it was already there. ok how do i go about it?
Electronic speedo cluster ('90-91, common, all burbs/K5's/crews/cab-chassis) DRAC from same vehicle, wiring from same vehicle. Power the DRAC, power the cluster correctly, done.
This of course assumes stock cluster. You would only really need the stock speedometer/housing I suppose, (for mounting and wiring, although you could probably solder the wires to the speedo connector) the eletric speedo is "standalone" from the other gauges, other than power and ground, which of course is simple to handle.
Sure simplifies speedo correction for tire/gear changes.
This of course assumes stock cluster. You would only really need the stock speedometer/housing I suppose, (for mounting and wiring, although you could probably solder the wires to the speedo connector) the eletric speedo is "standalone" from the other gauges, other than power and ground, which of course is simple to handle.
Sure simplifies speedo correction for tire/gear changes.
84CUCV
3/4 ton status
ok pretty simple thanks good to know
If you are using the stock cluster, the newer ones are arranged better, but have absolutely no provision for the factory tach small fuel gauge. The casting is entirely different in that location, and would require a lot of modification to get to work. Only real catch IMO, IF using the stock cluster.
You will do a fair amount of repinning of the cluster connector, but if you don't mind doing that and the small bit of figuring out what wire does what on your truck instrument panel connector now, it will indeed be easy, just a bit time consuming. Other than the speedo and clock, no functions really changed.
Oh, and the 4WD indicator light is also not a separate harness on the '90-91 clusters either, if that's important to you.
You will do a fair amount of repinning of the cluster connector, but if you don't mind doing that and the small bit of figuring out what wire does what on your truck instrument panel connector now, it will indeed be easy, just a bit time consuming. Other than the speedo and clock, no functions really changed.
Oh, and the 4WD indicator light is also not a separate harness on the '90-91 clusters either, if that's important to you.
They also have an alternator idiot light, which is super handy for CS130 alternator swaps 
I never looked at the one I have, I agree, probably would have been handy for the CS swap lol.
84CUCV
3/4 ton status
CS130 alternator swaps?? guess it has more amps?
Their voltage regulation is better, but from the charts I've seen, their output is pretty similar to a 94 amp 12SI. The CS144 puts out a lot more power at a lower RPM than either of those.
84CUCV
3/4 ton status
i will look into that. need a new alt anyway
Yes, check the threads. Someone just posted the output chart, but there is a lot of info on the CS swaps.
Big difference on mine that I noticed is that when I go to roll the window down or up, voltage stays constant. With the 12SI, voltage would draw down about as bad as when the starter is cranking the engine over.
If I had a lot of electrical load at idle, a 144 would be the clear choice.
Big difference on mine that I noticed is that when I go to roll the window down or up, voltage stays constant. With the 12SI, voltage would draw down about as bad as when the starter is cranking the engine over.
If I had a lot of electrical load at idle, a 144 would be the clear choice.
84CUCV
3/4 ton status
any chance you have a part number?
Not off the top of my head, but I believe the Pontiac Transport is given as a good donor to ask for the alternator from.
It's somewhere here in the forum, but I'd be surprised if someone doesn't already have the part number/application and responds.
It's somewhere here in the forum, but I'd be surprised if someone doesn't already have the part number/application and responds.
