Electricity. My amp draws alot of juice from my battery, which gives me a low fluctuating idle and dim lights, at idle my amps look like about 9, and around 3k they're less than 12.5, what options would I have as far as getting a bigger battery, alternator with bigger output, ideas?

 

If you have a s4 the s5 alt will drop right in and offer more amps. What is causing such a high draw anyway? If you have a s5 alt there's always the FD alts but they require a vbelt pulley and they don't match the S4 harness connector.

 

search alternator upgrade.

 

this is common problem with amps. one solution is to install a power cap.(1F i think) install it befor the amp that way the cap. can help with the amp draw. Bounes; some have a voltage output lcd screen

 

The S4 70A alternator is very weak. The FAQ has a diagram for conversions to S5 and S6+ alternators. There's also a thread somewhere about using a Taurus 140A alt.

Not completely true. While an S5 alternator will bolt on perfectly, the connector is the oval type found on an FD alternator. The S5 also requires a constant 12V source for the regulator, unlike the S4's switched 12V. The warning light wire remains the same, but a new, fused wire will have to be run to the L terminal.

 

Too add $.02 of help, the s5/FD alternator plug can be found on most all 90's mazdas in the junk yard. So if you go that route and need that plug, thats where.

 

i can post a pic of how the cap. is installed. am running 2 amps in my fc w/ 11 speakers. the sound is sweet!!!!.. my lights do not dim out at all. i think i paid out a little over a bill for the cap. install is easy. just trying to weigh out whats more cost effective a new /used alternator and the mod. you have to do to make it work or a power capacitor made for this problem

 

I thought that this was the primary reason the Taurus SHO had issues; the Ford acc couldn't handle 7000 Yamaha-made RPM. If they can't take 7K, how would they like 8K? Or are the Taurus pieces so inexpensive that one can justify replacing them every 25,000 miles?

 

if i did this right maybe you can look at pics

 

my pic above is w/ key on car not running, and car at idel

 

Ask Jackhild59. Whichever Taurus alternator he's using seems to work just fine: https://www.rx7club.com/showthread.p...ghlight=taurus

 

The s5 alt is a little stronger or a lot of people upgrade to FD too. Search the forums for a guide. The s5 isn't quite a direct drop in though; you need to swap a couple wires.