Ok. I have heard rumors about people fitting, Ford Tempo Alternators on Fc's. I don't know if there already is a write up or not, but I'm going to record what I do, in short detail, so I can use that as future reference. Would anyone like for me to take notes (with better detail, for others to use) and take photos. Possibly use it and make a sticky/DIY thread?

I'm asking this because I'm going to make reference sheet to what I used and how I had to modify anything and wire the alt(for future use). I want some feedback so I can make it more user friendly than just for me.

BTW I took out the Alt from a Tempo today and it seems to fit very well. (By just making rough measurements)


And if anyone asks. I picked up the Alt for 20 dollars, my S4 alternator is dead and I want something more powerful to take on the load for my new E-fan as well.
The Tempo (I think it came out of a 4cyl I will check tomorrow) alt pushes out 95 Amps of power and is relatively cheap. I do not plan on modifying the actual mounting points to install it, and am going to rig up a plug to fit into the stock location in case I ever need/find a stock alt over the Ford one... ( I plan on using the Ford one for now and testing how well it works with the car. and continue to use it if it turns out well)


Let me know what you guys think.
Adam

 

The more writeups the better. DO IT NOW!!!!

 

i was thinking today, since typical fords have lower rpm run ranges, that a tempo alt might be ok with a underdrive pulley for daily driving etc.. im not sure about the water pump tho

 

I read about this retrofit last week. I'm planning on doing it when I install my electric fan. I was under the impression that it put out 130amps though. Take notes on the adapter from RX-7 harness to ford harness that you come up with... I'm very interested.

 

Ok, I got it in. It's up and running.

At idle its charges about 12.5
While accelerating it peaked to 15.2
The battery was completely dead, and I'm going to drive around for a few days and recheck it.

I'll post up what i did when i get it up on the computer, I'm uploading the pics now

 

I used a tempo alt

The B terminal is too long touches the throttle body (On S5) shave it down

The connectors are the same as stock S5's, so a simple S4 to S5 alt guide would give the proper instructions for you S4 guys.

The tempo probably has a redline of 5-7k rpm, not sure. I don't have any issues when hitting 8k rpm

The tempo is more common, probably lasts longer. It's also much cheaper.

No brackets need to be modified, there is a notch on it which hits the wiring harness behind the alt so you need to shimmy it in from as low as you can

The bolt that goes through the casing didn't seem to want to go through all the way (Maybe hitting the wiring harness?) I'll put a few washers so I can get the plug bracket to fit where it used to be

At idle with everything on I'm getting about 12.5, during the day with nothing on at idle/accel its about 13

 

sweet.. size wise, how does it compare? my alt belts are a lil long so i have my alt tension up high, which pushes my top mount up into the hood.. curious if its taller

 

It's larger, I use the stock size belts and it's not even near maxed out.

The alt is also in the same exact position. You need to have the pulley's swapped which will require a smaller spacer if you don't got the tools any shop can do it in about 15 mins, I think it's much more cost effective.

A simple solution for the b term is to make sure the rubber is over it and I stuffed some cardboard behind it (I had everything jacked from my car when it was stranded outside of town, I just wanted her working) once I have time to look into it I'm sure a lil hack saw? would do the job fine.

The stock S4/s5 alts little thing that goes onto the b term wont fit stock I tried looking into making it fit looks like you'll 1) need to make the b term shorter regardless 2) drill out the hole, the b term on the tempo alt is alil thicker

Hypertek you'd probably be fine, the tempo alt wont go down enough to easially put on the belts, so if yours are a tad longer. It's not MUCH larger, the alt actually looks THE SAME, look on autozone or whatever, thats what convinced me to get it

 

I had a bit of trouble getting on the, belts. I had to tilt down the alt and slip on the belt. I used the dual alt pulley that I had on my old alt. The only issue I had was that the bolts I got with the alt was so long it was interfering with the OMP lever thats goes from the TB to the OMP. I just used a few washers so that it wouldn't stick out as much and gave it some clearance. I didnt have any other issues with it, its runing a lot better than before, smoothe acceleration, A LOT less misfire/popping in high RPM (actually none at all. I guess the dying alt gave it a weak spark).

My alt is getting real hot and peaked at 15.2 when I was revving it up, I'm going to keep monitoring it to see if the alt stabilizes. Maybe the dead bat was making a large draw on it? Not sure. Anyone have any ideas?


Cmanns, which pulley did you use on it?

 

I put on the stock S5 alt pulley

Mine has gotten pretty high but I don't think 15ish, stock gauge could be wrong but idk

All my lights are brighter, car runs strong, the batt was completely DEAD when I got the new alt on, after a jump it charged the batt fully and it hasnt let me down so far.

I've also herd no screetching sounds and such

I used the stock tempo pulley just to get my car off the side of the road and to my friends house, I had to do what you described. It's about the same size as a double pulley. to get the belts on now I just try to put on as much as I can then I move the belts and it snaps right into place

 

Our pulleys are larger in outside diameter, I held them side by side to compare. But since it is a serp. belt and a V-belt the inside diameter of the V-belt looks to be about the same size as the pulley from the Tempo.



My Stock guage reads wrong, it read 16 volts with a dead alt, and now with the new alt the Voltmeter bounced off the max limit lol...


My lights are very bright too, I love it. I'm just going to try to find a new guage cluster and install some more guages. Water temp, volt, oil psi, and oil temp to monitor the car better as i drive. I have them sitting in my garage, just need to install them, I lost my job yesterday, so as long as i dont have a job, i'll install the things that I have been putting on hold, while of course looking for a job.

 

pics please? so lets make everything clear for the rest of us:

Pulleys will swap so i can use my dual alt pulley off my FC alt?

mounting bolts are all the same?

what about plug wiring? do i have to get a plug for a tempo to splice into my harness?

diagram?

 

Tempo Alt


S5 Alt


If you have an S5, it'll be pretty much drop in replacement besides the obvious. If you have a S4 ask al0389.

If the dual pulley fits, which it should, then yes. The stock S5 alt pulley almost didn't fit

 

I was under the impression that at idle the alternator should be charging atleast 13.5 - 13.8 not 12.5. And I also thought that it wasn't supposed to get to 15. Seems like maybe something is wrong? Or am I mistaking?

 

I had to drill out the hole on my pulley to fit the tempo, The shaft of the tempo pulley is a bit thicker than the FC. The alternator fits very well in the stock location, all you need to do is wire it up. I finished the car late last night and was having trouble uploading pictures, but I will definitely get the information up as soon as I can..



It is normal for an alt to charge at 12.5-13volts when at idle, the charging voltage should definitely raise up to 13.6-14.5volts most... Anything below 13.6 while accelerating can be considered a weak alternator, and anything above 14.5 should be monitored for overcharging. Overcharging isn't a good thing, it can burn out many electrucal components, light bulbs, and kill the battery...

I picked up an alt from the junkyard, I spent 20 dollars on it. I considered it a rumor about fitting a Tempo alt on there, I wanted to see if it would really fit before I bought a new one. The voltage regulator on my alt may be damaged, or the dead battery may have put an extra load on the alt to charge it. I'm going to monitor it and see if the charging voltage levels out around 14.

 

Here are a few pics of it installed. I will continue to upload pics and wirte it up, I took about 4-5 pages of notes, I'll sort it out and try to make it as simple to read on a step by step basis.

 

al0389, I used the stock shaft or whatever its called, it just doesnt go in all the way, then again i didnt use much force like was required for about that amount to get the shaft? off

 

IIRC someone on these forums is using one of the high output tempo alts 170amps!!! I've read that getting too much out of an alt can actually put more drain on your system, but I don't understand the science behind it

http://www.motorcityreman.com/tempo.html

 

Alternators adjust I believe the more draw

If you had a 170amp alt, gotta make sure all your cables like to the b-term, batt, fuse box, is good size and condition. You will theoretically use more strain on the engine which most try to use as little as possible but where power is made power is needed

 

The regular pumps out 95Amps. the High output/performance one pushes out 170. But the regular will will do more than enough than I need for the car



Edit:
I went back to the junkyard today, The car I pulled the alt from was a 1994 Ford Escort. Apparently the 1992-1994 Ford Tempo and the 1991-1996 Ford Escort use the same Alternator. Which are the 1.9 4cyl for the Escort and the 2.34cyl for the Tempo. The tempo also has a V6 model, but it has a different alternator, I have not comfirmed if it will also fit. Best bet is to stick with the 4cyl Tempo model.

 

What are the dimensions of the Tempo alt. I'm looking at replacement for my FD alt. It needs rebuild, swap for a reman'd one, or a different used one. My FD barely fits under my TMIC.

I need alot of amps as I've got 2-3 amps (one might be dead), and by the time I'm done the car will have 4 gauges (boost, water and oil temp, oil pressure) and I'd love to toss on a Taurus efan.

The HO Tempo alt is tempting, it'd be round the same price as a reman'd FD alt. I've got 4ga wiring for my grounds, and power for amps. I consolidated my grounds of the ECU onto one...um...8ga. IIRC.

 

awesome.. so to fit a FC duel belt pully, you basically just bore out the hole? Sorry i dont know what it looks like off.. Just use a drill?

I think it would hit my tmic if i dont change my belts *yeah i got some longer belts because i was dumb and thought duel pully didnt use 2x stock alt belts*

 

Well you are not supposed to charge a battery using the alternator so that could be why it was so high. I guess I'll look into getting this alternator as well. Looking at the prices the FD Alternator is 220 out the door for 100amps, the tempo is around 180-200, and the escort is the cheapest at 165. So you can save about 60 dollars for 5 less amps. and 15 amps over your s5 one.

Watch out though according to Autozone there is a 75 amp alt. at least they sell one.

Although with a little modifying (bracket making) you could put 130 amps in there with a 96 Taurus 3.0 OHC Alt. Source: https://www.rx7club.com/showthread.p...rus+alternator
And tauruses have the higher redline.

 

here you go dude.. booyaah!!
http://cgi.ebay.com/ebaymotors/Reman...Q5fAccessories

dam good deal.. just it aint on my agenda right now, but will be put on the list =D

 

Now I got to decide if I want to get my FD alt replaced or go with this bad boy. This is cheaper =P