Thanks for helping me with posting the pic. I just have to finish drlling the holes for the buttons and wiring them up so I can get back on the road.

 

Take it easy drilling the holes. Let the drill do the job and don't push down on it. The glass/plastic cracks really easy. Don't thank me, Thank Halfspec. I just posted/fallow his idea here.

 

Hey guys quick question on the fuel level guage did you do manual calibration or did you use one of preset ones the guage comes with.

 

On the one I used, you used the resistance reading from the OEM sender unit (FSM has this reading). The Speedhut unit, you can "calibrate" your empty/full point by telling it which one it is.

 

Hey very nicely done, I am planning to do the same thing this winter btw how did u hook up the tach? Using the oem pcb signal or get it from the cpu?
Khris

 

I got the the RPMs signal from the cluster wiring harness.

 

ok cool, I saw u cluster on speedhut gallery and it look awsome I did not know who it was I gonna do a search but something tell to come on the forum and that's when i saw ur original post.

 

im adding mine to this older thread in case someone stumbles on it looking for a solution. my car is a 78 and that is a fiberglass copy of the stock gauges with the holes cut for the speedhut gauges.

 

That's pretty awesome.

 

 

What size was each gauge you used from Speedhut?

 

4" for the tach and speedo and 2 1/16" for the others.

 

Thanks, that's what I have in my cart right now just wanted to verify. Hopefully I can order them soon, though I have more important items to get in the mean time.

 

Great work here guys. Really liking that FB retrofit too!

 

Just bought the Speedhut gauges last night and this is exactly what I was thinking...keeping the stock speedo hooked up and behind the gauge cluster. It's not like anyone will see it anyway. I'm going to try it this way. I'll let you guys know if it works.

 

Is it possible to use the non-GPS speedo if you don't have cruise control? I want to do this project soon but I need to check the legality of GPS speedos as the main speedo over here in the UK.

Cheers
Paul.

 

Whether its a GPS or non-GPS speedo has nothing to do with the cruise control, so you should be fine either way. I don't believe either of them will support cruise control so I'd have to modify the stock speedo to keep cc regardless.

It's just that the GPS speedo is easier to install.

 

Cheers. I wasn't sure with it being mentioned about keeping the stock speedo somewhere that it was required or not.

I just checked and GPS speedos aren't legal in the UK.

 

Think we really need the whole speedo... or just the guts that convert the signal?

I bet someone electronic savvy could make a signal conditioner that would eliminate the problem altogether

 

A buddy that has 20+ years of experience with electrical like this looked at my speedo and said I need to keep the speedo motor and odometer box on the board in order for it to work. I found a 16-track ribbon that he's going to trim down and solder to the ribbon on the back of the cluster for me so I can remote mount the speedo board behind the cluster. I was looking for a 15-track ribbon with a connector like stock so I could just extend it but I was told that would probably be impossible to find.

I'd much rather find a way to do without the board but I'm not great with electrical so I'll trust my buddy lol.

 

So my buddy soldered the extra length of ribbon onto the cluster ribbon for me, I wrapped the speedo circuit board in bubble wrap and slid it between the top of the cluster and the bottom side of the gauge hood and it fits there pretty well, holding itself in. However, I tried cruise control the other day and it didn't work. So I'm thinking the board needs to be grounded or something. Makes sense now but I hadn't thought of it before. I might do some testing with it, grounding it in different places to see what works, if anything. I'll post up again.

I also need to see why my tach isn't working. I'm not sure I tapped into the right wire, or maybe that wire became disconnected last time I was messing around back there and I didn't notice it, but I think either wrong wire or needing a ground or something is more likely. I think I got the yellow wire with blue stripe instead of blue wire with yellow stripe, but I haven't taken the cluster back out to check. Other than those two problems, I still need to set the fuel gauge correctly (I had chosen the 1/4 tank option on the fuel gauge because the ohms for that setting were the closest to the ohms for the stock float, but it didn't work).

 

the mounting screws on the back are the grounds

 

So I should get CC back if I ground at least one of those, huh? Or do you think I should ground all of them? lol I could run all of them together into one wire and then just ground that I guess, just to be safe.

Like I've told you in PM, electrical is part of my job but I HATE it lol.

And other than that, I have to figure out why I don't have anything reading on my tach. Not sure if I'm tapped into the wrong wire or what. Then I'll post a thread of exactly where you need to tap into wires for the Speedhut gauges, or at least the three that I have, then others can chime in with theirs too, and I'll post the link in here.

 

Try to ground them all together and make a common ground. Report back please.

 

Yeah I'll do that. Thanks!