Build Thread Mustang5L5's Build Thread -

Yup

So, played around with this a bit. Decided to test all 4 tachs I have and see how they differ.

The 4 clusters I have are
Original to my car white face 140MPH
A good spare 140MPH original cluster
My 160MPH cluster
A junk parts cluster. This one I played around with the pot a bit to adjust

Here's how it plots out. The RED line is the standard set value for the RPM. Closer to the red line, the better.




As you can see, the junk tach that I played with last night is the closest after tweaking the pot a little. The 160MPH and 140MPH cluster were pretty even. The surprise was the white face cluster. This is the cluster that's been in my car since 1988 and the one i've been staring at for 20+ years. It's off. WAAAAY off. It's one of the reasons I installed the Autometer shift light you might have seen in earlier posts. The shift light would go off at 5400RPM and my tach would be showing almost 7K.

I've also discovered the tach in my 160MPH cluster is a late 1989 tach with 2pots for adjustment. The earlier 87-early 89 tachs only have a single pot. My next step is to get that tach (blue line) as close to the red line as i can.

Anyway, too much geek stuff i guess but i ripped the shift light out, so i want to get the stock tach as accurate as i can in the 5000-6000 range.

And after adjusting the 2-pot tach

Blue original, green as left. Red is the target

Decided to play with the tach in my original cluster.

here’s the original setting at 6000 RPM. WAAAAY off.


here’s the best I could do at 6k RPM. Single pot adjustmrnt



Here's the spreadsheet. Green is original. Blue line is what I set it to. I had to adjust it so it was reading under the actual RPM at lower RPM for it to come in close to actual near redline. At some point in the future, i'll prob just swap this tach with one of the other ones I have that seems to be more accurate.



That's all for this. White clsuter going back into the box and squirreled away. I might make a youtube video on this.

Cruise stuff installed. For the record, had my car not been completely apart right now, I never would have done this. I needed to pull the dash, which was 10 mins considering I had most of it apart anyway. But there was no way I could have bolted the clutch switch and brake pedal vac mounts on with the dash in place. No way in tarnation.

but, amplifier in plsce and everything is plugged in.



The only hiccup is the depressor for the brake vacuum dump. It won’t fit my MM pedal. I’ll need to fabricate something.

But...this should work now.



I’m happy with my decision to flip the orientation of the button with regards to how they are normally setup. I can reach them easily with my left hand on the wheel. I tend to like my right hand free and steering wheel controls on my left, so this works for me

also, after doing some reading, decided not to go with the poly trans mount. Going to switch it to rubber.

I think the reason I went poly was because the Ford mount was discontinued and all I could find were cheap repros with bad reviews.

I hop on eBay, and behold....NOS goodness.

Got my hands on a wiper motor. NOS. Ford. $35. For a tempo

F7PU-17904-BA

But, the mount pattern is the same. In fact, it will bolt right up. Difference is it’s a 6-wire single plug, while oem is two 3-wire plugs. Plug harnesses are easy to find, but I need a wiring diagram now to rewire for this motor

I need new hardeare. Something tells me these wiper bolts are not standard thread. They are courser than the 1/4-20 bolt shown here.

anyone know what they are?